/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/id_trans.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 20:41:45,563 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 20:41:45,566 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 20:41:45,596 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 20:41:45,596 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 20:41:45,599 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 20:41:45,600 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 20:41:45,609 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 20:41:45,612 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 20:41:45,613 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 20:41:45,614 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 20:41:45,615 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 20:41:45,615 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 20:41:45,618 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 20:41:45,619 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 20:41:45,620 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 20:41:45,622 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 20:41:45,624 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 20:41:45,626 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 20:41:45,632 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 20:41:45,633 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 20:41:45,635 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 20:41:45,637 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 20:41:45,638 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 20:41:45,651 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 20:41:45,661 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 20:41:45,662 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 20:41:45,662 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 20:41:45,664 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 20:41:45,694 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 20:41:45,695 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 20:41:45,696 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 20:41:45,696 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 20:41:45,696 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 20:41:45,696 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 20:41:45,697 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 20:41:45,697 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 20:41:45,697 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 20:41:45,697 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 20:41:45,697 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 20:41:45,698 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 20:41:45,698 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 20:41:45,698 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 20:41:45,698 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 20:41:45,698 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 20:41:45,699 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 20:41:45,699 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 20:41:45,699 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 20:41:45,699 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 20:41:45,699 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 20:41:45,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 20:41:45,700 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 20:41:45,700 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 20:41:45,700 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 20:41:45,700 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 20:41:45,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 20:41:45,701 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 20:41:45,701 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 20:41:45,701 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 -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; [2020-08-21 20:41:46,014 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 20:41:46,026 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 20:41:46,030 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 20:41:46,031 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 20:41:46,032 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 20:41:46,032 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/id_trans.i [2020-08-21 20:41:46,086 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/372e14b4c/f44ec0c92adf41458467a89f4532a3af/FLAG2c054f9ae [2020-08-21 20:41:46,492 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 20:41:46,493 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/id_trans.i [2020-08-21 20:41:46,500 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/372e14b4c/f44ec0c92adf41458467a89f4532a3af/FLAG2c054f9ae [2020-08-21 20:41:46,832 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/372e14b4c/f44ec0c92adf41458467a89f4532a3af [2020-08-21 20:41:46,841 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 20:41:46,843 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 20:41:46,844 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 20:41:46,844 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 20:41:46,848 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 20:41:46,849 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 08:41:46" (1/1) ... [2020-08-21 20:41:46,854 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@693a331e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:41:46, skipping insertion in model container [2020-08-21 20:41:46,854 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 08:41:46" (1/1) ... [2020-08-21 20:41:46,864 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 20:41:46,886 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 20:41:47,057 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 20:41:47,062 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 20:41:47,077 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 20:41:47,089 INFO L208 MainTranslator]: Completed translation [2020-08-21 20:41:47,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:41:47 WrapperNode [2020-08-21 20:41:47,090 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 20:41:47,091 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 20:41:47,092 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 20:41:47,092 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 20:41:47,104 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:41:47" (1/1) ... [2020-08-21 20:41:47,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:41:47" (1/1) ... [2020-08-21 20:41:47,109 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:41:47" (1/1) ... [2020-08-21 20:41:47,109 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:41:47" (1/1) ... [2020-08-21 20:41:47,113 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:41:47" (1/1) ... [2020-08-21 20:41:47,118 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:41:47" (1/1) ... [2020-08-21 20:41:47,119 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:41:47" (1/1) ... [2020-08-21 20:41:47,121 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 20:41:47,121 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 20:41:47,122 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 20:41:47,122 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 20:41:47,123 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:41:47" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-21 20:41:47,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 20:41:47,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 20:41:47,282 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 20:41:47,283 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 20:41:47,283 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 20:41:47,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 20:41:47,283 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 20:41:47,284 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 20:41:47,284 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 20:41:47,285 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 20:41:47,285 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 20:41:47,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 20:41:47,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 20:41:47,499 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 20:41:47,499 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 20:41:47,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 08:41:47 BoogieIcfgContainer [2020-08-21 20:41:47,505 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 20:41:47,507 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 20:41:47,507 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 20:41:47,510 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 20:41:47,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 08:41:46" (1/3) ... [2020-08-21 20:41:47,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20dac302 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 08:41:47, skipping insertion in model container [2020-08-21 20:41:47,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:41:47" (2/3) ... [2020-08-21 20:41:47,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20dac302 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 08:41:47, skipping insertion in model container [2020-08-21 20:41:47,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 08:41:47" (3/3) ... [2020-08-21 20:41:47,517 INFO L109 eAbstractionObserver]: Analyzing ICFG id_trans.i [2020-08-21 20:41:47,529 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 20:41:47,539 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 20:41:47,555 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 20:41:47,586 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 20:41:47,586 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 20:41:47,587 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 20:41:47,587 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 20:41:47,587 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 20:41:47,587 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 20:41:47,587 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 20:41:47,587 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 20:41:47,613 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-08-21 20:41:47,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-21 20:41:47,622 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:41:47,623 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:41:47,624 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:41:47,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:41:47,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1541464652, now seen corresponding path program 1 times [2020-08-21 20:41:47,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:41:47,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2104026791] [2020-08-21 20:41:47,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:41:47,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:47,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:41:47,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:47,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:41:47,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2104026791] [2020-08-21 20:41:47,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:41:47,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 20:41:47,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406597737] [2020-08-21 20:41:47,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 20:41:47,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:41:47,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 20:41:47,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 20:41:47,929 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2020-08-21 20:41:48,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:41:48,081 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2020-08-21 20:41:48,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 20:41:48,082 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-08-21 20:41:48,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:41:48,092 INFO L225 Difference]: With dead ends: 46 [2020-08-21 20:41:48,092 INFO L226 Difference]: Without dead ends: 22 [2020-08-21 20:41:48,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 20:41:48,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-21 20:41:48,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-08-21 20:41:48,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-21 20:41:48,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-08-21 20:41:48,144 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 11 [2020-08-21 20:41:48,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:41:48,144 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-08-21 20:41:48,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 20:41:48,145 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-08-21 20:41:48,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-21 20:41:48,147 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:41:48,147 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:41:48,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 20:41:48,149 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:41:48,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:41:48,150 INFO L82 PathProgramCache]: Analyzing trace with hash -621797359, now seen corresponding path program 1 times [2020-08-21 20:41:48,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:41:48,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952209187] [2020-08-21 20:41:48,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:41:48,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:48,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:41:48,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:48,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 20:41:48,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:41:48,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:41:48,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952209187] [2020-08-21 20:41:48,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:41:48,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 20:41:48,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768952071] [2020-08-21 20:41:48,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 20:41:48,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:41:48,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 20:41:48,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 20:41:48,251 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 5 states. [2020-08-21 20:41:48,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:41:48,315 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-21 20:41:48,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 20:41:48,315 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-08-21 20:41:48,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:41:48,317 INFO L225 Difference]: With dead ends: 28 [2020-08-21 20:41:48,317 INFO L226 Difference]: Without dead ends: 26 [2020-08-21 20:41:48,318 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 [2020-08-21 20:41:48,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-21 20:41:48,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-08-21 20:41:48,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-21 20:41:48,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-08-21 20:41:48,326 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 16 [2020-08-21 20:41:48,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:41:48,327 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-08-21 20:41:48,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 20:41:48,327 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-08-21 20:41:48,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 20:41:48,328 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:41:48,329 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:41:48,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 20:41:48,329 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:41:48,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:41:48,330 INFO L82 PathProgramCache]: Analyzing trace with hash -561745487, now seen corresponding path program 1 times [2020-08-21 20:41:48,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:41:48,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197929612] [2020-08-21 20:41:48,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:41:48,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 20:41:48,366 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 20:41:48,366 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 20:41:48,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 20:41:48,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 08:41:48 BoogieIcfgContainer [2020-08-21 20:41:48,388 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 20:41:48,390 INFO L168 Benchmark]: Toolchain (without parser) took 1546.91 ms. Allocated memory was 146.8 MB in the beginning and 202.9 MB in the end (delta: 56.1 MB). Free memory was 103.5 MB in the beginning and 125.5 MB in the end (delta: -22.0 MB). Peak memory consumption was 34.1 MB. Max. memory is 7.1 GB. [2020-08-21 20:41:48,391 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 146.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 20:41:48,392 INFO L168 Benchmark]: CACSL2BoogieTranslator took 246.73 ms. Allocated memory is still 146.8 MB. Free memory was 103.1 MB in the beginning and 93.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-08-21 20:41:48,393 INFO L168 Benchmark]: Boogie Preprocessor took 30.38 ms. Allocated memory is still 146.8 MB. Free memory was 93.6 MB in the beginning and 92.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. [2020-08-21 20:41:48,400 INFO L168 Benchmark]: RCFGBuilder took 383.35 ms. Allocated memory was 146.8 MB in the beginning and 202.9 MB in the end (delta: 56.1 MB). Free memory was 92.1 MB in the beginning and 168.9 MB in the end (delta: -76.9 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-08-21 20:41:48,401 INFO L168 Benchmark]: TraceAbstraction took 880.98 ms. Allocated memory is still 202.9 MB. Free memory was 168.3 MB in the beginning and 125.5 MB in the end (delta: 42.8 MB). Peak memory consumption was 42.8 MB. Max. memory is 7.1 GB. [2020-08-21 20:41:48,409 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 146.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 246.73 ms. Allocated memory is still 146.8 MB. Free memory was 103.1 MB in the beginning and 93.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.38 ms. Allocated memory is still 146.8 MB. Free memory was 93.6 MB in the beginning and 92.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 383.35 ms. Allocated memory was 146.8 MB in the beginning and 202.9 MB in the end (delta: 56.1 MB). Free memory was 92.1 MB in the beginning and 168.9 MB in the end (delta: -76.9 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 880.98 ms. Allocated memory is still 202.9 MB. Free memory was 168.3 MB in the beginning and 125.5 MB in the end (delta: 42.8 MB). Peak memory consumption was 42.8 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 [L20] COND TRUE (j < idBitLength / 8) && (j < material_length) [L21] CALL __VERIFIER_assert( 0 <= j) [L7] COND FALSE !(!(cond)) [L21] RET __VERIFIER_assert( 0 <= j) [L22] CALL __VERIFIER_assert( j < material_length ) [L7] COND FALSE !(!(cond)) [L22] RET __VERIFIER_assert( j < material_length ) [L23] CALL __VERIFIER_assert( 0 <= j/4 ) [L7] COND FALSE !(!(cond)) [L23] RET __VERIFIER_assert( 0 <= j/4 ) [L24] CALL __VERIFIER_assert( j/4 < nlen) [L7] COND TRUE !(cond) [L8] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.7s, OverallIterations: 3, TraceHistogramMax: 4, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 42 SDtfs, 13 SDslu, 98 SDs, 0 SdLazy, 44 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18 GetRequests, 10 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, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 53 NumberOfCodeBlocks, 53 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 25 ConstructedInterpolants, 0 QuantifiedInterpolants, 575 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 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...