/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 NOT_INCREMENTALLY -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 11:44:51,587 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 11:44:51,589 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 11:44:51,602 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 11:44:51,603 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 11:44:51,604 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 11:44:51,605 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 11:44:51,608 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 11:44:51,609 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 11:44:51,610 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 11:44:51,611 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 11:44:51,613 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 11:44:51,613 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 11:44:51,614 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 11:44:51,616 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 11:44:51,617 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 11:44:51,618 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 11:44:51,619 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 11:44:51,621 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 11:44:51,623 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 11:44:51,625 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 11:44:51,626 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 11:44:51,627 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 11:44:51,628 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 11:44:51,631 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 11:44:51,640 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 11:44:51,641 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 11:44:51,642 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 11:44:51,643 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 11:44:51,658 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 11:44:51,658 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 11:44:51,659 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 11:44:51,660 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 11:44:51,660 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 11:44:51,660 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 11:44:51,660 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 11:44:51,660 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 11:44:51,661 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 11:44:51,661 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 11:44:51,661 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 11:44:51,661 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 11:44:51,661 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 11:44:51,662 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 11:44:51,662 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 11:44:51,662 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 11:44:51,662 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 11:44:51,662 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 11:44:51,663 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 11:44:51,663 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 11:44:51,663 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 11:44:51,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:44:51,663 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 11:44:51,664 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 11:44:51,664 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 11:44:51,664 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 11:44:51,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:44:51,664 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 11:44:51,665 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 11:44:51,665 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 -> NOT_INCREMENTALLY [2020-07-21 11:44:51,929 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 11:44:51,944 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 11:44:51,947 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 11:44:51,949 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 11:44:51,952 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 11:44:51,953 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/id_trans.i [2020-07-21 11:44:52,021 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/043c664b7/64e54dc60c2a4c4aa1a3948725e1aaae/FLAG3cee224ac [2020-07-21 11:44:52,494 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 11:44:52,495 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/id_trans.i [2020-07-21 11:44:52,502 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/043c664b7/64e54dc60c2a4c4aa1a3948725e1aaae/FLAG3cee224ac [2020-07-21 11:44:52,814 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/043c664b7/64e54dc60c2a4c4aa1a3948725e1aaae [2020-07-21 11:44:52,825 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 11:44:52,827 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 11:44:52,828 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 11:44:52,828 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 11:44:52,832 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 11:44:52,833 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:44:52" (1/1) ... [2020-07-21 11:44:52,836 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c7bccb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:44:52, skipping insertion in model container [2020-07-21 11:44:52,836 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:44:52" (1/1) ... [2020-07-21 11:44:52,844 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 11:44:52,862 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 11:44:53,027 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:44:53,031 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 11:44:53,050 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:44:53,065 INFO L208 MainTranslator]: Completed translation [2020-07-21 11:44:53,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:44:53 WrapperNode [2020-07-21 11:44:53,066 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 11:44:53,067 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 11:44:53,067 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 11:44:53,067 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 11:44:53,081 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:44:53" (1/1) ... [2020-07-21 11:44:53,081 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:44:53" (1/1) ... [2020-07-21 11:44:53,087 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:44:53" (1/1) ... [2020-07-21 11:44:53,087 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:44:53" (1/1) ... [2020-07-21 11:44:53,091 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:44:53" (1/1) ... [2020-07-21 11:44:53,097 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:44:53" (1/1) ... [2020-07-21 11:44:53,098 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:44:53" (1/1) ... [2020-07-21 11:44:53,100 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 11:44:53,100 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 11:44:53,100 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 11:44:53,101 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 11:44:53,101 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:44:53" (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 11:44:53,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 11:44:53,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 11:44:53,257 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 11:44:53,257 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 11:44:53,257 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 11:44:53,257 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 11:44:53,257 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 11:44:53,257 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 11:44:53,258 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 11:44:53,258 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 11:44:53,258 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 11:44:53,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 11:44:53,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 11:44:53,632 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 11:44:53,633 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 11:44:53,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:44:53 BoogieIcfgContainer [2020-07-21 11:44:53,638 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 11:44:53,639 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 11:44:53,639 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 11:44:53,659 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 11:44:53,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:44:52" (1/3) ... [2020-07-21 11:44:53,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ad7b315 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:44:53, skipping insertion in model container [2020-07-21 11:44:53,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:44:53" (2/3) ... [2020-07-21 11:44:53,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ad7b315 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:44:53, skipping insertion in model container [2020-07-21 11:44:53,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:44:53" (3/3) ... [2020-07-21 11:44:53,664 INFO L109 eAbstractionObserver]: Analyzing ICFG id_trans.i [2020-07-21 11:44:53,673 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 11:44:53,680 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 11:44:53,695 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 11:44:53,722 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 11:44:53,722 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 11:44:53,722 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 11:44:53,722 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 11:44:53,722 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 11:44:53,723 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 11:44:53,723 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 11:44:53,723 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 11:44:53,748 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-07-21 11:44:53,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 11:44:53,755 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:44:53,756 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:44:53,756 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:44:53,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:44:53,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1541464652, now seen corresponding path program 1 times [2020-07-21 11:44:53,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:44:53,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256340704] [2020-07-21 11:44:53,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:44:53,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:44:53,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 11:44:53,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:44:53,889 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:44:53,932 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 11:44:53,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:44:53,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256340704] [2020-07-21 11:44:53,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:44:53,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 11:44:53,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709354852] [2020-07-21 11:44:53,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 11:44:53,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:44:53,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 11:44:53,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 11:44:53,961 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2020-07-21 11:44:54,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:44:54,091 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2020-07-21 11:44:54,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 11:44:54,093 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-07-21 11:44:54,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:44:54,104 INFO L225 Difference]: With dead ends: 46 [2020-07-21 11:44:54,104 INFO L226 Difference]: Without dead ends: 22 [2020-07-21 11:44:54,108 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 11:44:54,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-21 11:44:54,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-21 11:44:54,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-21 11:44:54,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-07-21 11:44:54,160 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 11 [2020-07-21 11:44:54,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:44:54,161 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-07-21 11:44:54,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 11:44:54,162 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-07-21 11:44:54,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 11:44:54,164 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:44:54,164 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:44:54,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:44:54,380 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:44:54,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:44:54,381 INFO L82 PathProgramCache]: Analyzing trace with hash -621797359, now seen corresponding path program 1 times [2020-07-21 11:44:54,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:44:54,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1677223956] [2020-07-21 11:44:54,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:44:54,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:44:54,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 11:44:54,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:44:54,431 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:44:54,451 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 11:44:54,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:44:54,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1677223956] [2020-07-21 11:44:54,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:44:54,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 11:44:54,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945290989] [2020-07-21 11:44:54,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 11:44:54,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:44:54,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 11:44:54,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 11:44:54,456 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 5 states. [2020-07-21 11:44:54,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:44:54,517 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-07-21 11:44:54,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 11:44:54,518 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-21 11:44:54,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:44:54,519 INFO L225 Difference]: With dead ends: 28 [2020-07-21 11:44:54,520 INFO L226 Difference]: Without dead ends: 26 [2020-07-21 11:44:54,521 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 11:44:54,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-21 11:44:54,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-07-21 11:44:54,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 11:44:54,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-07-21 11:44:54,530 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 16 [2020-07-21 11:44:54,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:44:54,530 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-07-21 11:44:54,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 11:44:54,531 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-07-21 11:44:54,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 11:44:54,532 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:44:54,532 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 11:44:54,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:44:54,747 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:44:54,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:44:54,747 INFO L82 PathProgramCache]: Analyzing trace with hash -561745487, now seen corresponding path program 1 times [2020-07-21 11:44:54,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:44:54,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94287953] [2020-07-21 11:44:54,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:44:54,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:44:54,795 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:44:54,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:44:54,822 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:44:54,840 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 11:44:54,841 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 11:44:55,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:44:55,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:44:55 BoogieIcfgContainer [2020-07-21 11:44:55,078 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 11:44:55,081 INFO L168 Benchmark]: Toolchain (without parser) took 2254.00 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 102.6 MB in the beginning and 117.7 MB in the end (delta: -15.1 MB). Peak memory consumption was 49.4 MB. Max. memory is 7.1 GB. [2020-07-21 11:44:55,082 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 138.4 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-21 11:44:55,083 INFO L168 Benchmark]: CACSL2BoogieTranslator took 238.65 ms. Allocated memory is still 138.4 MB. Free memory was 102.4 MB in the beginning and 92.8 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-21 11:44:55,084 INFO L168 Benchmark]: Boogie Preprocessor took 32.84 ms. Allocated memory is still 138.4 MB. Free memory was 92.8 MB in the beginning and 91.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. [2020-07-21 11:44:55,085 INFO L168 Benchmark]: RCFGBuilder took 537.72 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 91.2 MB in the beginning and 168.9 MB in the end (delta: -77.7 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-07-21 11:44:55,086 INFO L168 Benchmark]: TraceAbstraction took 1439.46 ms. Allocated memory is still 202.9 MB. Free memory was 168.9 MB in the beginning and 117.7 MB in the end (delta: 51.2 MB). Peak memory consumption was 51.2 MB. Max. memory is 7.1 GB. [2020-07-21 11:44:55,090 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 138.4 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 238.65 ms. Allocated memory is still 138.4 MB. Free memory was 102.4 MB in the beginning and 92.8 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 32.84 ms. Allocated memory is still 138.4 MB. Free memory was 92.8 MB in the beginning and 91.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 537.72 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 91.2 MB in the beginning and 168.9 MB in the end (delta: -77.7 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1439.46 ms. Allocated memory is still 202.9 MB. Free memory was 168.9 MB in the beginning and 117.7 MB in the end (delta: 51.2 MB). Peak memory consumption was 51.2 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, 3 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...