/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 -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops/string-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 14:53:54,832 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 14:53:54,837 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 14:53:54,862 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 14:53:54,863 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 14:53:54,865 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 14:53:54,868 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 14:53:54,877 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 14:53:54,881 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 14:53:54,887 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 14:53:54,889 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 14:53:54,891 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 14:53:54,892 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 14:53:54,896 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 14:53:54,899 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 14:53:54,901 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 14:53:54,904 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 14:53:54,905 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 14:53:54,906 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 14:53:54,913 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 14:53:54,921 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 14:53:54,926 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 14:53:54,927 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 14:53:54,928 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 14:53:54,931 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 14:53:54,948 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 14:53:54,950 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 14:53:54,952 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 14:53:54,953 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-17 14:53:54,974 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 14:53:54,975 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 14:53:54,978 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 14:53:54,979 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 14:53:54,979 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 14:53:54,979 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 14:53:54,979 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 14:53:54,980 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 14:53:54,980 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 14:53:54,980 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 14:53:54,981 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 14:53:54,982 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 14:53:54,982 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 14:53:54,982 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 14:53:54,983 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 14:53:54,983 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 14:53:54,984 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 14:53:54,984 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 14:53:54,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 14:53:54,984 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 14:53:54,984 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 14:53:54,985 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 14:53:54,985 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-17 14:53:55,347 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 14:53:55,363 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 14:53:55,368 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 14:53:55,371 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 14:53:55,371 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 14:53:55,373 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/string-1.i [2020-07-17 14:53:55,467 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/562d691f8/010e352422b040a8bfabb92324c4b423/FLAGed178d0f2 [2020-07-17 14:53:56,087 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 14:53:56,090 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/string-1.i [2020-07-17 14:53:56,105 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/562d691f8/010e352422b040a8bfabb92324c4b423/FLAGed178d0f2 [2020-07-17 14:53:56,413 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/562d691f8/010e352422b040a8bfabb92324c4b423 [2020-07-17 14:53:56,426 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 14:53:56,431 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 14:53:56,435 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 14:53:56,435 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 14:53:56,439 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 14:53:56,440 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 02:53:56" (1/1) ... [2020-07-17 14:53:56,443 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7100592f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:53:56, skipping insertion in model container [2020-07-17 14:53:56,443 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 02:53:56" (1/1) ... [2020-07-17 14:53:56,456 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 14:53:56,479 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 14:53:56,727 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 14:53:56,736 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 14:53:56,774 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 14:53:56,919 INFO L208 MainTranslator]: Completed translation [2020-07-17 14:53:56,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:53:56 WrapperNode [2020-07-17 14:53:56,920 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 14:53:56,921 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 14:53:56,922 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 14:53:56,922 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 14:53:56,939 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:53:56" (1/1) ... [2020-07-17 14:53:56,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:53:56" (1/1) ... [2020-07-17 14:53:56,950 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:53:56" (1/1) ... [2020-07-17 14:53:56,951 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:53:56" (1/1) ... [2020-07-17 14:53:56,966 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:53:56" (1/1) ... [2020-07-17 14:53:56,976 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:53:56" (1/1) ... [2020-07-17 14:53:56,979 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:53:56" (1/1) ... [2020-07-17 14:53:56,982 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 14:53:56,984 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 14:53:56,984 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 14:53:56,984 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 14:53:56,986 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:53:56" (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 [2020-07-17 14:53:57,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 14:53:57,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 14:53:57,065 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-17 14:53:57,065 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-17 14:53:57,065 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 14:53:57,065 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 14:53:57,065 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-17 14:53:57,066 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-17 14:53:57,066 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-17 14:53:57,066 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-17 14:53:57,066 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 14:53:57,067 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-17 14:53:57,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-17 14:53:57,067 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-17 14:53:57,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-17 14:53:57,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 14:53:57,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 14:53:57,572 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 14:53:57,572 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-07-17 14:53:57,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 02:53:57 BoogieIcfgContainer [2020-07-17 14:53:57,582 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 14:53:57,583 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 14:53:57,584 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 14:53:57,589 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 14:53:57,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 02:53:56" (1/3) ... [2020-07-17 14:53:57,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2252c175 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 02:53:57, skipping insertion in model container [2020-07-17 14:53:57,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:53:56" (2/3) ... [2020-07-17 14:53:57,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2252c175 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 02:53:57, skipping insertion in model container [2020-07-17 14:53:57,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 02:53:57" (3/3) ... [2020-07-17 14:53:57,595 INFO L109 eAbstractionObserver]: Analyzing ICFG string-1.i [2020-07-17 14:53:57,624 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 14:53:57,638 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 14:53:57,659 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 14:53:57,687 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 14:53:57,687 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 14:53:57,688 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-17 14:53:57,688 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 14:53:57,688 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 14:53:57,688 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 14:53:57,688 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 14:53:57,689 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 14:53:57,719 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states. [2020-07-17 14:53:57,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-17 14:53:57,741 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:53:57,742 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 14:53:57,743 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:53:57,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:53:57,751 INFO L82 PathProgramCache]: Analyzing trace with hash -768807104, now seen corresponding path program 1 times [2020-07-17 14:53:57,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:53:57,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867202720] [2020-07-17 14:53:57,765 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:53:57,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:53:58,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:53:58,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:53:58,056 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:53:58,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867202720] [2020-07-17 14:53:58,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:53:58,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 14:53:58,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352975375] [2020-07-17 14:53:58,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 14:53:58,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:53:58,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 14:53:58,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 14:53:58,115 INFO L87 Difference]: Start difference. First operand 105 states. Second operand 3 states. [2020-07-17 14:53:58,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:53:58,605 INFO L93 Difference]: Finished difference Result 188 states and 215 transitions. [2020-07-17 14:53:58,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 14:53:58,607 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-07-17 14:53:58,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:53:58,630 INFO L225 Difference]: With dead ends: 188 [2020-07-17 14:53:58,630 INFO L226 Difference]: Without dead ends: 77 [2020-07-17 14:53:58,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 14:53:58,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-17 14:53:58,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-07-17 14:53:58,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-17 14:53:58,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2020-07-17 14:53:58,757 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 37 [2020-07-17 14:53:58,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:53:58,761 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2020-07-17 14:53:58,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 14:53:58,763 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2020-07-17 14:53:58,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-17 14:53:58,767 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:53:58,767 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 14:53:58,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 14:53:58,770 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:53:58,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:53:58,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1309055982, now seen corresponding path program 1 times [2020-07-17 14:53:58,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:53:58,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18717480] [2020-07-17 14:53:58,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:53:58,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:53:58,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:53:58,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:53:58,908 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:53:58,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18717480] [2020-07-17 14:53:58,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:53:58,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 14:53:58,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322661540] [2020-07-17 14:53:58,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 14:53:58,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:53:58,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 14:53:58,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 14:53:58,914 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand 4 states. [2020-07-17 14:53:59,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:53:59,191 INFO L93 Difference]: Finished difference Result 144 states and 155 transitions. [2020-07-17 14:53:59,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 14:53:59,191 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-07-17 14:53:59,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:53:59,194 INFO L225 Difference]: With dead ends: 144 [2020-07-17 14:53:59,194 INFO L226 Difference]: Without dead ends: 89 [2020-07-17 14:53:59,197 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 14:53:59,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-07-17 14:53:59,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2020-07-17 14:53:59,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-07-17 14:53:59,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2020-07-17 14:53:59,214 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 41 [2020-07-17 14:53:59,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:53:59,214 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2020-07-17 14:53:59,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 14:53:59,215 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2020-07-17 14:53:59,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-17 14:53:59,217 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:53:59,218 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, 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] [2020-07-17 14:53:59,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 14:53:59,218 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:53:59,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:53:59,219 INFO L82 PathProgramCache]: Analyzing trace with hash 512896601, now seen corresponding path program 1 times [2020-07-17 14:53:59,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:53:59,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186440797] [2020-07-17 14:53:59,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:53:59,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 14:53:59,262 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.generateMetaTrace(AcceleratedInterpolation.java:458) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:290) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:191) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:144) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:508) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:370) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-07-17 14:53:59,271 INFO L168 Benchmark]: Toolchain (without parser) took 2839.95 ms. Allocated memory was 136.3 MB in the beginning and 231.2 MB in the end (delta: 94.9 MB). Free memory was 100.2 MB in the beginning and 192.2 MB in the end (delta: -92.0 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. [2020-07-17 14:53:59,273 INFO L168 Benchmark]: CDTParser took 0.43 ms. Allocated memory is still 136.3 MB. Free memory was 118.5 MB in the beginning and 118.3 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-17 14:53:59,274 INFO L168 Benchmark]: CACSL2BoogieTranslator took 486.13 ms. Allocated memory was 136.3 MB in the beginning and 201.9 MB in the end (delta: 65.5 MB). Free memory was 99.8 MB in the beginning and 180.9 MB in the end (delta: -81.1 MB). Peak memory consumption was 24.2 MB. Max. memory is 7.1 GB. [2020-07-17 14:53:59,275 INFO L168 Benchmark]: Boogie Preprocessor took 61.60 ms. Allocated memory is still 201.9 MB. Free memory was 180.9 MB in the beginning and 178.1 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-07-17 14:53:59,276 INFO L168 Benchmark]: RCFGBuilder took 598.25 ms. Allocated memory is still 201.9 MB. Free memory was 178.1 MB in the beginning and 153.8 MB in the end (delta: 24.3 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. [2020-07-17 14:53:59,277 INFO L168 Benchmark]: TraceAbstraction took 1683.72 ms. Allocated memory was 201.9 MB in the beginning and 231.2 MB in the end (delta: 29.4 MB). Free memory was 153.8 MB in the beginning and 192.2 MB in the end (delta: -38.4 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-17 14:53:59,282 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.43 ms. Allocated memory is still 136.3 MB. Free memory was 118.5 MB in the beginning and 118.3 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 486.13 ms. Allocated memory was 136.3 MB in the beginning and 201.9 MB in the end (delta: 65.5 MB). Free memory was 99.8 MB in the beginning and 180.9 MB in the end (delta: -81.1 MB). Peak memory consumption was 24.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 61.60 ms. Allocated memory is still 201.9 MB. Free memory was 180.9 MB in the beginning and 178.1 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 598.25 ms. Allocated memory is still 201.9 MB. Free memory was 178.1 MB in the beginning and 153.8 MB in the end (delta: 24.3 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1683.72 ms. Allocated memory was 201.9 MB in the beginning and 231.2 MB in the end (delta: 29.4 MB). Free memory was 153.8 MB in the beginning and 192.2 MB in the end (delta: -38.4 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.generateMetaTrace(AcceleratedInterpolation.java:458) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...