/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 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/n.c11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 17:41:07,946 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 17:41:07,950 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 17:41:07,970 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 17:41:07,970 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 17:41:07,973 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 17:41:07,975 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 17:41:07,989 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 17:41:07,991 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 17:41:07,992 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 17:41:07,994 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 17:41:07,996 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 17:41:07,996 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 17:41:07,997 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 17:41:07,998 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 17:41:07,999 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 17:41:08,000 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 17:41:08,001 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 17:41:08,003 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 17:41:08,004 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 17:41:08,006 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 17:41:08,007 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 17:41:08,008 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 17:41:08,008 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 17:41:08,011 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 17:41:08,019 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 17:41:08,019 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 17:41:08,020 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 17:41:08,021 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 [2020-07-20 17:41:08,036 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 17:41:08,036 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 17:41:08,037 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 17:41:08,038 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 17:41:08,038 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 17:41:08,038 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 17:41:08,038 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 17:41:08,038 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 17:41:08,039 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 17:41:08,039 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 17:41:08,039 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 17:41:08,039 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 17:41:08,039 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 17:41:08,040 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 17:41:08,040 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 17:41:08,040 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 17:41:08,040 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 17:41:08,040 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 17:41:08,041 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 17:41:08,041 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 17:41:08,041 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 17:41:08,041 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:41:08,041 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 17:41:08,042 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 17:41:08,042 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 17:41:08,042 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 17:41:08,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:41:08,042 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 17:41:08,043 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 17:41:08,043 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 -> 4 [2020-07-20 17:41:08,328 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 17:41:08,342 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 17:41:08,345 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 17:41:08,347 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 17:41:08,347 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 17:41:08,348 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/n.c11.c [2020-07-20 17:41:08,412 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e63c8cd2/149e3131655b4094bd9faadc9c76f6eb/FLAG20ea7affd [2020-07-20 17:41:08,884 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 17:41:08,886 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c11.c [2020-07-20 17:41:08,892 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e63c8cd2/149e3131655b4094bd9faadc9c76f6eb/FLAG20ea7affd [2020-07-20 17:41:09,262 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e63c8cd2/149e3131655b4094bd9faadc9c76f6eb [2020-07-20 17:41:09,272 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 17:41:09,275 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 17:41:09,276 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 17:41:09,276 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 17:41:09,280 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 17:41:09,281 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:41:09" (1/1) ... [2020-07-20 17:41:09,284 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cd9a6d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:41:09, skipping insertion in model container [2020-07-20 17:41:09,284 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:41:09" (1/1) ... [2020-07-20 17:41:09,293 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 17:41:09,311 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 17:41:09,494 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:41:09,499 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 17:41:09,516 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:41:09,529 INFO L208 MainTranslator]: Completed translation [2020-07-20 17:41:09,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:41:09 WrapperNode [2020-07-20 17:41:09,530 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 17:41:09,530 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 17:41:09,531 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 17:41:09,531 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 17:41:09,637 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:41:09" (1/1) ... [2020-07-20 17:41:09,649 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:41:09" (1/1) ... [2020-07-20 17:41:09,654 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:41:09" (1/1) ... [2020-07-20 17:41:09,654 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:41:09" (1/1) ... [2020-07-20 17:41:09,658 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:41:09" (1/1) ... [2020-07-20 17:41:09,662 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:41:09" (1/1) ... [2020-07-20 17:41:09,663 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:41:09" (1/1) ... [2020-07-20 17:41:09,664 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 17:41:09,665 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 17:41:09,665 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 17:41:09,665 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 17:41:09,666 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:41:09" (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 [2020-07-20 17:41:09,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 17:41:09,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 17:41:09,730 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 17:41:09,730 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 17:41:09,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 17:41:09,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 17:41:09,731 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 17:41:09,731 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 17:41:09,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 17:41:09,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 17:41:09,938 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 17:41:09,939 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 17:41:09,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:41:09 BoogieIcfgContainer [2020-07-20 17:41:09,944 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 17:41:09,946 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 17:41:09,946 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 17:41:09,950 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 17:41:09,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:41:09" (1/3) ... [2020-07-20 17:41:09,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dc05088 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:41:09, skipping insertion in model container [2020-07-20 17:41:09,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:41:09" (2/3) ... [2020-07-20 17:41:09,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dc05088 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:41:09, skipping insertion in model container [2020-07-20 17:41:09,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:41:09" (3/3) ... [2020-07-20 17:41:09,970 INFO L109 eAbstractionObserver]: Analyzing ICFG n.c11.c [2020-07-20 17:41:10,006 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 17:41:10,027 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 17:41:10,062 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 17:41:10,089 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 17:41:10,090 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 17:41:10,090 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 17:41:10,090 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 17:41:10,090 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 17:41:10,090 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 17:41:10,090 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 17:41:10,091 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 17:41:10,110 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-20 17:41:10,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 17:41:10,115 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:41:10,116 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:41:10,116 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:41:10,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:41:10,122 INFO L82 PathProgramCache]: Analyzing trace with hash -147882559, now seen corresponding path program 1 times [2020-07-20 17:41:10,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:41:10,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028214872] [2020-07-20 17:41:10,133 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 [2020-07-20 17:41:10,229 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:41:10,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:41:10,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 17:41:10,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:41:10,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:41:10,255 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:41:10,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028214872] [2020-07-20 17:41:10,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:41:10,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 17:41:10,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098596188] [2020-07-20 17:41:10,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 17:41:10,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:41:10,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 17:41:10,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 17:41:10,276 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-07-20 17:41:10,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:41:10,300 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-07-20 17:41:10,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 17:41:10,302 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-20 17:41:10,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:41:10,311 INFO L225 Difference]: With dead ends: 32 [2020-07-20 17:41:10,312 INFO L226 Difference]: Without dead ends: 13 [2020-07-20 17:41:10,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 17:41:10,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-07-20 17:41:10,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-07-20 17:41:10,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-07-20 17:41:10,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-07-20 17:41:10,354 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-07-20 17:41:10,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:41:10,354 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-07-20 17:41:10,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 17:41:10,355 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-07-20 17:41:10,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 17:41:10,355 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:41:10,356 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:41:10,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:41:10,572 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:41:10,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:41:10,573 INFO L82 PathProgramCache]: Analyzing trace with hash -158041290, now seen corresponding path program 1 times [2020-07-20 17:41:10,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:41:10,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094344226] [2020-07-20 17:41:10,574 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 [2020-07-20 17:41:10,608 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:41:10,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:41:10,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 17:41:10,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:41:10,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:41:10,675 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:41:10,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094344226] [2020-07-20 17:41:10,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:41:10,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 17:41:10,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418089103] [2020-07-20 17:41:10,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 17:41:10,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:41:10,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 17:41:10,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:41:10,682 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2020-07-20 17:41:10,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:41:10,740 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2020-07-20 17:41:10,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 17:41:10,741 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-20 17:41:10,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:41:10,742 INFO L225 Difference]: With dead ends: 27 [2020-07-20 17:41:10,742 INFO L226 Difference]: Without dead ends: 16 [2020-07-20 17:41:10,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 17:41:10,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-07-20 17:41:10,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-07-20 17:41:10,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-20 17:41:10,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-07-20 17:41:10,748 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-07-20 17:41:10,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:41:10,749 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-07-20 17:41:10,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 17:41:10,749 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-07-20 17:41:10,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 17:41:10,750 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:41:10,750 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:41:10,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:41:10,951 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:41:10,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:41:10,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1776138601, now seen corresponding path program 1 times [2020-07-20 17:41:10,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:41:10,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1590942884] [2020-07-20 17:41:10,955 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 [2020-07-20 17:41:10,985 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:41:10,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:41:10,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 17:41:10,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:41:11,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:41:11,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:41:11,069 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:41:11,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:41:11,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1590942884] [2020-07-20 17:41:11,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:41:11,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-20 17:41:11,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119760668] [2020-07-20 17:41:11,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 17:41:11,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:41:11,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 17:41:11,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-20 17:41:11,136 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2020-07-20 17:41:11,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:41:11,259 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2020-07-20 17:41:11,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 17:41:11,260 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-07-20 17:41:11,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:41:11,261 INFO L225 Difference]: With dead ends: 29 [2020-07-20 17:41:11,261 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 17:41:11,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-07-20 17:41:11,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 17:41:11,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 17:41:11,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 17:41:11,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 17:41:11,263 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2020-07-20 17:41:11,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:41:11,263 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 17:41:11,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 17:41:11,264 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 17:41:11,264 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 17:41:11,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:41:11,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 17:41:11,567 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 17:41:11,567 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 17:41:11,567 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 17:41:11,567 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 17:41:11,568 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 17:41:11,568 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 17:41:11,568 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 12 32) the Hoare annotation is: true [2020-07-20 17:41:11,568 INFO L268 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-07-20 17:41:11,568 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 12 32) no Hoare annotation was computed. [2020-07-20 17:41:11,569 INFO L268 CegarLoopResult]: For program point L21(lines 21 22) no Hoare annotation was computed. [2020-07-20 17:41:11,569 INFO L268 CegarLoopResult]: For program point L21-2(lines 21 22) no Hoare annotation was computed. [2020-07-20 17:41:11,569 INFO L264 CegarLoopResult]: At program point L19-2(lines 19 27) the Hoare annotation is: (< (mod main_~len~0 4294967296) 5) [2020-07-20 17:41:11,569 INFO L264 CegarLoopResult]: At program point L19-3(lines 19 27) the Hoare annotation is: (< (mod main_~len~0 4294967296) 5) [2020-07-20 17:41:11,569 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 12 32) no Hoare annotation was computed. [2020-07-20 17:41:11,570 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-07-20 17:41:11,570 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-07-20 17:41:11,570 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-20 17:41:11,571 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-07-20 17:41:11,571 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-07-20 17:41:11,571 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-07-20 17:41:11,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:41:11 BoogieIcfgContainer [2020-07-20 17:41:11,593 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 17:41:11,598 INFO L168 Benchmark]: Toolchain (without parser) took 2321.50 ms. Allocated memory was 144.7 MB in the beginning and 202.9 MB in the end (delta: 58.2 MB). Free memory was 102.3 MB in the beginning and 106.1 MB in the end (delta: -3.8 MB). Peak memory consumption was 54.4 MB. Max. memory is 7.1 GB. [2020-07-20 17:41:11,601 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 144.7 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 17:41:11,602 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.96 ms. Allocated memory is still 144.7 MB. Free memory was 101.9 MB in the beginning and 92.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-20 17:41:11,604 INFO L168 Benchmark]: Boogie Preprocessor took 133.88 ms. Allocated memory was 144.7 MB in the beginning and 202.9 MB in the end (delta: 58.2 MB). Free memory was 92.4 MB in the beginning and 181.0 MB in the end (delta: -88.6 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-07-20 17:41:11,611 INFO L168 Benchmark]: RCFGBuilder took 279.22 ms. Allocated memory is still 202.9 MB. Free memory was 181.0 MB in the beginning and 168.8 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-07-20 17:41:11,612 INFO L168 Benchmark]: TraceAbstraction took 1647.09 ms. Allocated memory is still 202.9 MB. Free memory was 168.8 MB in the beginning and 106.1 MB in the end (delta: 62.7 MB). Peak memory consumption was 62.7 MB. Max. memory is 7.1 GB. [2020-07-20 17:41:11,626 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 144.7 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 253.96 ms. Allocated memory is still 144.7 MB. Free memory was 101.9 MB in the beginning and 92.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 133.88 ms. Allocated memory was 144.7 MB in the beginning and 202.9 MB in the end (delta: 58.2 MB). Free memory was 92.4 MB in the beginning and 181.0 MB in the end (delta: -88.6 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 279.22 ms. Allocated memory is still 202.9 MB. Free memory was 181.0 MB in the beginning and 168.8 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1647.09 ms. Allocated memory is still 202.9 MB. Free memory was 168.8 MB in the beginning and 106.1 MB in the end (delta: 62.7 MB). Peak memory consumption was 62.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: len % 4294967296 < 5 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.3s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 41 SDtfs, 16 SDslu, 67 SDs, 0 SdLazy, 41 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred 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, 13 PreInvPairs, 21 NumberOfFragments, 15 HoareAnnotationTreeSize, 13 FomulaSimplifications, 26 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 14 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 33 NumberOfCodeBlocks, 30 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 42 ConstructedInterpolants, 0 QuantifiedInterpolants, 1050 SizeOfPredicates, 4 NumberOfNonLiveVariables, 70 ConjunctsInSsa, 13 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 0/2 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...