/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/id_trans.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 23:19:26,998 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 23:19:27,001 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 23:19:27,013 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 23:19:27,014 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 23:19:27,015 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 23:19:27,016 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 23:19:27,018 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 23:19:27,020 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 23:19:27,021 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 23:19:27,022 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 23:19:27,023 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 23:19:27,023 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 23:19:27,024 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 23:19:27,025 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 23:19:27,027 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 23:19:27,027 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 23:19:27,028 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 23:19:27,030 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 23:19:27,032 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 23:19:27,033 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 23:19:27,035 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 23:19:27,036 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 23:19:27,036 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 23:19:27,039 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 23:19:27,046 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 23:19:27,047 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 23:19:27,048 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 23:19:27,049 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 23:19:27,063 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 23:19:27,064 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 23:19:27,065 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 23:19:27,065 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 23:19:27,065 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 23:19:27,065 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 23:19:27,066 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 23:19:27,066 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 23:19:27,066 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 23:19:27,066 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 23:19:27,066 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 23:19:27,067 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 23:19:27,067 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 23:19:27,067 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 23:19:27,067 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 23:19:27,067 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 23:19:27,068 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 23:19:27,068 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 23:19:27,068 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 23:19:27,068 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 23:19:27,068 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 23:19:27,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:19:27,069 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 23:19:27,069 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 23:19:27,069 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 23:19:27,069 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 23:19:27,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:19:27,070 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 23:19:27,070 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 23:19:27,070 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 23:19:27,386 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 23:19:27,400 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 23:19:27,404 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 23:19:27,405 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 23:19:27,406 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 23:19:27,406 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/id_trans.i [2020-07-21 23:19:27,479 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ed33d249/d82450e675604c2fbdec214d5ec22515/FLAG3a2b62e84 [2020-07-21 23:19:27,928 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 23:19:27,929 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/id_trans.i [2020-07-21 23:19:27,939 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ed33d249/d82450e675604c2fbdec214d5ec22515/FLAG3a2b62e84 [2020-07-21 23:19:28,303 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ed33d249/d82450e675604c2fbdec214d5ec22515 [2020-07-21 23:19:28,314 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 23:19:28,317 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 23:19:28,318 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 23:19:28,318 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 23:19:28,322 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 23:19:28,323 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:19:28" (1/1) ... [2020-07-21 23:19:28,326 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@decd492 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:19:28, skipping insertion in model container [2020-07-21 23:19:28,326 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:19:28" (1/1) ... [2020-07-21 23:19:28,334 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 23:19:28,352 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 23:19:28,505 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:19:28,510 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 23:19:28,528 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:19:28,544 INFO L208 MainTranslator]: Completed translation [2020-07-21 23:19:28,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:19:28 WrapperNode [2020-07-21 23:19:28,545 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 23:19:28,545 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 23:19:28,545 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 23:19:28,546 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 23:19:28,560 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:19:28" (1/1) ... [2020-07-21 23:19:28,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:19:28" (1/1) ... [2020-07-21 23:19:28,566 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:19:28" (1/1) ... [2020-07-21 23:19:28,566 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:19:28" (1/1) ... [2020-07-21 23:19:28,571 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:19:28" (1/1) ... [2020-07-21 23:19:28,576 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:19:28" (1/1) ... [2020-07-21 23:19:28,578 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:19:28" (1/1) ... [2020-07-21 23:19:28,579 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 23:19:28,580 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 23:19:28,580 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 23:19:28,580 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 23:19:28,581 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:19:28" (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 23:19:28,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 23:19:28,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 23:19:28,735 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 23:19:28,735 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 23:19:28,735 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 23:19:28,736 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 23:19:28,736 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 23:19:28,737 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 23:19:28,737 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 23:19:28,737 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 23:19:28,738 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 23:19:28,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 23:19:28,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 23:19:28,950 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 23:19:28,951 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 23:19:28,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:19:28 BoogieIcfgContainer [2020-07-21 23:19:28,955 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 23:19:28,956 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 23:19:28,956 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 23:19:28,959 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 23:19:28,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:19:28" (1/3) ... [2020-07-21 23:19:28,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d027e32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:19:28, skipping insertion in model container [2020-07-21 23:19:28,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:19:28" (2/3) ... [2020-07-21 23:19:28,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d027e32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:19:28, skipping insertion in model container [2020-07-21 23:19:28,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:19:28" (3/3) ... [2020-07-21 23:19:28,963 INFO L109 eAbstractionObserver]: Analyzing ICFG id_trans.i [2020-07-21 23:19:28,973 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 23:19:28,980 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 23:19:28,994 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 23:19:29,016 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 23:19:29,016 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 23:19:29,017 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 23:19:29,017 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 23:19:29,017 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 23:19:29,017 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 23:19:29,017 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 23:19:29,017 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 23:19:29,035 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-07-21 23:19:29,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 23:19:29,041 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:19:29,042 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:19:29,043 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:19:29,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:19:29,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1541464652, now seen corresponding path program 1 times [2020-07-21 23:19:29,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:19:29,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505381543] [2020-07-21 23:19:29,057 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:19:29,139 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:19:29,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:19:29,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:19:29,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:19:29,212 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:19:29,238 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 23:19:29,239 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:19:29,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505381543] [2020-07-21 23:19:29,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:19:29,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 23:19:29,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330305164] [2020-07-21 23:19:29,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 23:19:29,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:19:29,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 23:19:29,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:19:29,267 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2020-07-21 23:19:29,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:19:29,385 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2020-07-21 23:19:29,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 23:19:29,388 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-07-21 23:19:29,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:19:29,398 INFO L225 Difference]: With dead ends: 46 [2020-07-21 23:19:29,399 INFO L226 Difference]: Without dead ends: 22 [2020-07-21 23:19:29,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 23:19:29,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-21 23:19:29,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-21 23:19:29,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-21 23:19:29,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-07-21 23:19:29,451 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 11 [2020-07-21 23:19:29,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:19:29,452 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-07-21 23:19:29,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 23:19:29,452 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-07-21 23:19:29,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 23:19:29,454 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:19:29,454 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:19:29,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:19:29,670 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:19:29,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:19:29,672 INFO L82 PathProgramCache]: Analyzing trace with hash -621797359, now seen corresponding path program 1 times [2020-07-21 23:19:29,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:19:29,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1193268169] [2020-07-21 23:19:29,675 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:19:29,719 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:19:29,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:19:29,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:19:29,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:19:29,736 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:19:29,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:19:29,760 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:19:29,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1193268169] [2020-07-21 23:19:29,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:19:29,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 23:19:29,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800975085] [2020-07-21 23:19:29,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 23:19:29,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:19:29,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 23:19:29,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:19:29,765 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 5 states. [2020-07-21 23:19:29,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:19:29,824 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-07-21 23:19:29,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 23:19:29,826 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-21 23:19:29,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:19:29,827 INFO L225 Difference]: With dead ends: 28 [2020-07-21 23:19:29,827 INFO L226 Difference]: Without dead ends: 26 [2020-07-21 23:19:29,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 23:19:29,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-21 23:19:29,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-07-21 23:19:29,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 23:19:29,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-07-21 23:19:29,837 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 16 [2020-07-21 23:19:29,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:19:29,838 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-07-21 23:19:29,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 23:19:29,838 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-07-21 23:19:29,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 23:19:29,839 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:19:29,840 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:19:30,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:19:30,054 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:19:30,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:19:30,055 INFO L82 PathProgramCache]: Analyzing trace with hash -561745487, now seen corresponding path program 1 times [2020-07-21 23:19:30,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:19:30,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054948435] [2020-07-21 23:19:30,057 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:19:30,095 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:19:30,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 23:19:30,095 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 23:19:30,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 23:19:30,107 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 23:19:30,122 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 23:19:30,123 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 23:19:30,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:19:30,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:19:30 BoogieIcfgContainer [2020-07-21 23:19:30,363 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 23:19:30,366 INFO L168 Benchmark]: Toolchain (without parser) took 2049.56 ms. Allocated memory was 145.2 MB in the beginning and 202.4 MB in the end (delta: 57.1 MB). Free memory was 103.2 MB in the beginning and 113.4 MB in the end (delta: -10.1 MB). Peak memory consumption was 47.0 MB. Max. memory is 7.1 GB. [2020-07-21 23:19:30,367 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 145.2 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-21 23:19:30,368 INFO L168 Benchmark]: CACSL2BoogieTranslator took 227.11 ms. Allocated memory is still 145.2 MB. Free memory was 102.8 MB in the beginning and 93.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-21 23:19:30,369 INFO L168 Benchmark]: Boogie Preprocessor took 34.22 ms. Allocated memory is still 145.2 MB. Free memory was 93.3 MB in the beginning and 91.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. [2020-07-21 23:19:30,370 INFO L168 Benchmark]: RCFGBuilder took 374.79 ms. Allocated memory was 145.2 MB in the beginning and 202.4 MB in the end (delta: 57.1 MB). Free memory was 91.8 MB in the beginning and 168.5 MB in the end (delta: -76.8 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-21 23:19:30,371 INFO L168 Benchmark]: TraceAbstraction took 1407.00 ms. Allocated memory is still 202.4 MB. Free memory was 168.5 MB in the beginning and 113.4 MB in the end (delta: 55.2 MB). Peak memory consumption was 55.2 MB. Max. memory is 7.1 GB. [2020-07-21 23:19:30,376 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 145.2 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 227.11 ms. Allocated memory is still 145.2 MB. Free memory was 102.8 MB in the beginning and 93.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 34.22 ms. Allocated memory is still 145.2 MB. Free memory was 93.3 MB in the beginning and 91.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 374.79 ms. Allocated memory was 145.2 MB in the beginning and 202.4 MB in the end (delta: 57.1 MB). Free memory was 91.8 MB in the beginning and 168.5 MB in the end (delta: -76.8 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1407.00 ms. Allocated memory is still 202.4 MB. Free memory was 168.5 MB in the beginning and 113.4 MB in the end (delta: 55.2 MB). Peak memory consumption was 55.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 8]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int idBitLength, material_length, nlen; [L15] int j, k; [L16] nlen = __VERIFIER_nondet_int() [L17] idBitLength = __VERIFIER_nondet_int() [L18] material_length = __VERIFIER_nondet_int() [L19] COND FALSE !(!( nlen == idBitLength / 32 )) [L20] j = 0 VAL [idBitLength=9, j=0, material_length=1, nlen=0] [L20] COND TRUE (j < idBitLength / 8) && (j < material_length) VAL [idBitLength=9, j=0, material_length=1, nlen=0] [L21] CALL __VERIFIER_assert( 0 <= j) VAL [\old(cond)=1] [L7] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L21] RET __VERIFIER_assert( 0 <= j) VAL [idBitLength=9, j=0, material_length=1, nlen=0] [L22] CALL __VERIFIER_assert( j < material_length ) VAL [\old(cond)=1] [L7] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L22] RET __VERIFIER_assert( j < material_length ) VAL [idBitLength=9, j=0, material_length=1, nlen=0] [L23] CALL __VERIFIER_assert( 0 <= j/4 ) VAL [\old(cond)=1] [L7] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L23] RET __VERIFIER_assert( 0 <= j/4 ) VAL [idBitLength=9, j=0, material_length=1, nlen=0] [L24] CALL __VERIFIER_assert( j/4 < nlen) VAL [\old(cond)=0] [L7] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L8] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.3s, OverallIterations: 3, TraceHistogramMax: 4, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 42 SDtfs, 13 SDslu, 100 SDs, 0 SdLazy, 46 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=2, 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 53 NumberOfCodeBlocks, 53 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 25 ConstructedInterpolants, 0 QuantifiedInterpolants, 525 SizeOfPredicates, 4 NumberOfNonLiveVariables, 83 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 2/2 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 incorrect! Received shutdown request...