/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.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-invgen/id_trans.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 23:14:34,773 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 23:14:34,777 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 23:14:34,806 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 23:14:34,806 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 23:14:34,808 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 23:14:34,809 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 23:14:34,812 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 23:14:34,814 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 23:14:34,815 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 23:14:34,816 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 23:14:34,818 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 23:14:34,818 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 23:14:34,819 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 23:14:34,821 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 23:14:34,822 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 23:14:34,824 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 23:14:34,827 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 23:14:34,830 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 23:14:34,833 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 23:14:34,839 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 23:14:34,841 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 23:14:34,844 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 23:14:34,846 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 23:14:34,853 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 23:14:34,878 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 23:14:34,879 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 23:14:34,885 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 23:14:34,886 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 23:14:34,909 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 23:14:34,910 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 23:14:34,911 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 23:14:34,912 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 23:14:34,912 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 23:14:34,913 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 23:14:34,913 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 23:14:34,913 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 23:14:34,913 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 23:14:34,914 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 23:14:34,915 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 23:14:34,915 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 23:14:34,915 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 23:14:34,915 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 23:14:34,916 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 23:14:34,916 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 23:14:34,916 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 23:14:34,916 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 23:14:34,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 23:14:34,917 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 23:14:34,917 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 23:14:34,917 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 23:14:34,918 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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: Use separate solver for trace checks -> true [2020-09-04 23:14:35,407 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 23:14:35,425 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 23:14:35,430 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 23:14:35,432 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 23:14:35,432 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 23:14:35,433 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/id_trans.i [2020-09-04 23:14:35,518 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a292860b7/08106a03bb824f36b0f26e6c6c0f81a6/FLAGeaea0c6dd [2020-09-04 23:14:36,099 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 23:14:36,100 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/id_trans.i [2020-09-04 23:14:36,109 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a292860b7/08106a03bb824f36b0f26e6c6c0f81a6/FLAGeaea0c6dd [2020-09-04 23:14:36,441 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a292860b7/08106a03bb824f36b0f26e6c6c0f81a6 [2020-09-04 23:14:36,456 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 23:14:36,459 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 23:14:36,463 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 23:14:36,463 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 23:14:36,468 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 23:14:36,469 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:14:36" (1/1) ... [2020-09-04 23:14:36,474 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@291cbb33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:14:36, skipping insertion in model container [2020-09-04 23:14:36,474 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:14:36" (1/1) ... [2020-09-04 23:14:36,484 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 23:14:36,513 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 23:14:36,758 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:14:36,764 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 23:14:36,783 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:14:36,801 INFO L208 MainTranslator]: Completed translation [2020-09-04 23:14:36,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:14:36 WrapperNode [2020-09-04 23:14:36,802 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 23:14:36,803 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 23:14:36,803 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 23:14:36,803 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 23:14:36,819 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:14:36" (1/1) ... [2020-09-04 23:14:36,820 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:14:36" (1/1) ... [2020-09-04 23:14:36,826 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:14:36" (1/1) ... [2020-09-04 23:14:36,826 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:14:36" (1/1) ... [2020-09-04 23:14:36,831 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:14:36" (1/1) ... [2020-09-04 23:14:36,838 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:14:36" (1/1) ... [2020-09-04 23:14:36,839 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:14:36" (1/1) ... [2020-09-04 23:14:36,916 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 23:14:36,917 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 23:14:36,917 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 23:14:36,917 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 23:14:36,919 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:14:36" (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 [2020-09-04 23:14:36,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 23:14:36,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 23:14:36,997 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-04 23:14:36,997 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 23:14:36,997 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 23:14:36,997 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 23:14:36,998 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 23:14:36,998 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-04 23:14:36,998 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 23:14:36,998 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 23:14:36,998 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 23:14:36,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 23:14:36,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 23:14:37,313 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 23:14:37,314 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-04 23:14:37,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:14:37 BoogieIcfgContainer [2020-09-04 23:14:37,320 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 23:14:37,335 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 23:14:37,335 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 23:14:37,340 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 23:14:37,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 11:14:36" (1/3) ... [2020-09-04 23:14:37,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75cfdbd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:14:37, skipping insertion in model container [2020-09-04 23:14:37,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:14:36" (2/3) ... [2020-09-04 23:14:37,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75cfdbd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:14:37, skipping insertion in model container [2020-09-04 23:14:37,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:14:37" (3/3) ... [2020-09-04 23:14:37,350 INFO L109 eAbstractionObserver]: Analyzing ICFG id_trans.i [2020-09-04 23:14:37,363 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 23:14:37,379 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 23:14:37,402 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 23:14:37,438 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 23:14:37,438 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 23:14:37,439 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-04 23:14:37,439 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 23:14:37,439 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 23:14:37,440 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 23:14:37,441 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 23:14:37,441 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 23:14:37,463 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-09-04 23:14:37,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-04 23:14:37,476 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:37,477 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:37,477 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:37,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:37,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1049898450, now seen corresponding path program 1 times [2020-09-04 23:14:37,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:37,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932987583] [2020-09-04 23:14:37,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:37,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:37,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:37,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:37,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:14:37,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932987583] [2020-09-04 23:14:37,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:14:37,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 23:14:37,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84258372] [2020-09-04 23:14:37,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 23:14:37,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:37,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 23:14:37,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 23:14:37,812 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 5 states. [2020-09-04 23:14:37,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:37,960 INFO L93 Difference]: Finished difference Result 73 states and 98 transitions. [2020-09-04 23:14:37,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 23:14:37,963 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-09-04 23:14:37,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:37,978 INFO L225 Difference]: With dead ends: 73 [2020-09-04 23:14:37,978 INFO L226 Difference]: Without dead ends: 45 [2020-09-04 23:14:37,984 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 [2020-09-04 23:14:38,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-04 23:14:38,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-09-04 23:14:38,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-04 23:14:38,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2020-09-04 23:14:38,049 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 25 [2020-09-04 23:14:38,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:38,050 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2020-09-04 23:14:38,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 23:14:38,051 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2020-09-04 23:14:38,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-04 23:14:38,053 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:38,053 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:38,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 23:14:38,054 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:38,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:38,055 INFO L82 PathProgramCache]: Analyzing trace with hash 56397381, now seen corresponding path program 1 times [2020-09-04 23:14:38,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:38,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256406325] [2020-09-04 23:14:38,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:38,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:38,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:38,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:38,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-04 23:14:38,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:38,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:14:38,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256406325] [2020-09-04 23:14:38,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:14:38,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 23:14:38,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163448939] [2020-09-04 23:14:38,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 23:14:38,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:38,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 23:14:38,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 23:14:38,170 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 5 states. [2020-09-04 23:14:38,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:38,237 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-09-04 23:14:38,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 23:14:38,238 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-09-04 23:14:38,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:38,242 INFO L225 Difference]: With dead ends: 48 [2020-09-04 23:14:38,243 INFO L226 Difference]: Without dead ends: 46 [2020-09-04 23:14:38,244 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 [2020-09-04 23:14:38,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-04 23:14:38,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-09-04 23:14:38,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-04 23:14:38,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-09-04 23:14:38,263 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 30 [2020-09-04 23:14:38,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:38,264 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-09-04 23:14:38,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 23:14:38,264 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-09-04 23:14:38,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-04 23:14:38,267 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:38,268 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:38,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 23:14:38,268 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:38,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:38,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1292887515, now seen corresponding path program 1 times [2020-09-04 23:14:38,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:38,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552789154] [2020-09-04 23:14:38,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:38,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 23:14:38,356 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 23:14:38,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 23:14:38,414 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 23:14:38,447 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 23:14:38,447 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 23:14:38,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 23:14:38,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 11:14:38 BoogieIcfgContainer [2020-09-04 23:14:38,480 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 23:14:38,484 INFO L168 Benchmark]: Toolchain (without parser) took 2024.60 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 104.4 MB in the beginning and 116.0 MB in the end (delta: -11.6 MB). Peak memory consumption was 51.3 MB. Max. memory is 7.1 GB. [2020-09-04 23:14:38,485 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 139.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 23:14:38,486 INFO L168 Benchmark]: CACSL2BoogieTranslator took 339.93 ms. Allocated memory is still 139.5 MB. Free memory was 104.2 MB in the beginning and 94.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-09-04 23:14:38,487 INFO L168 Benchmark]: Boogie Preprocessor took 113.60 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 94.5 MB in the beginning and 181.4 MB in the end (delta: -87.0 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2020-09-04 23:14:38,488 INFO L168 Benchmark]: RCFGBuilder took 402.96 ms. Allocated memory is still 202.4 MB. Free memory was 181.4 MB in the beginning and 166.5 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. [2020-09-04 23:14:38,489 INFO L168 Benchmark]: TraceAbstraction took 1145.81 ms. Allocated memory is still 202.4 MB. Free memory was 166.5 MB in the beginning and 116.0 MB in the end (delta: 50.5 MB). Peak memory consumption was 50.5 MB. Max. memory is 7.1 GB. [2020-09-04 23:14:38,493 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 139.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 339.93 ms. Allocated memory is still 139.5 MB. Free memory was 104.2 MB in the beginning and 94.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 113.60 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 94.5 MB in the beginning and 181.4 MB in the end (delta: -87.0 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 402.96 ms. Allocated memory is still 202.4 MB. Free memory was 181.4 MB in the beginning and 166.5 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1145.81 ms. Allocated memory is still 202.4 MB. Free memory was 166.5 MB in the beginning and 116.0 MB in the end (delta: 50.5 MB). Peak memory consumption was 50.5 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() VAL [__VERIFIER_nondet_int()=0, nlen=0] [L17] idBitLength = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=9, idBitLength=9, nlen=0] [L18] material_length = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=1, idBitLength=9, material_length=1, nlen=0] [L19] COND FALSE !(!( nlen == idBitLength / 32 )) VAL [idBitLength=9, material_length=1, nlen=0] [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, 45 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 3, TraceHistogramMax: 4, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 79 SDtfs, 15 SDslu, 206 SDs, 0 SdLazy, 52 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s 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=46occurred 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, 3 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 95 NumberOfCodeBlocks, 95 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 53 ConstructedInterpolants, 0 QuantifiedInterpolants, 1947 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...