/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/array-fpi/ss2f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 13:58:29,943 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 13:58:29,946 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 13:58:29,964 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 13:58:29,964 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 13:58:29,966 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 13:58:29,968 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 13:58:29,980 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 13:58:29,982 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 13:58:29,983 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 13:58:29,984 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 13:58:29,987 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 13:58:29,987 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 13:58:29,990 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 13:58:29,993 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 13:58:29,995 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 13:58:29,997 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 13:58:29,998 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 13:58:30,000 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 13:58:30,005 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 13:58:30,009 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 13:58:30,013 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 13:58:30,015 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 13:58:30,015 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 13:58:30,020 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 13:58:30,031 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 13:58:30,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 13:58:30,033 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 13:58:30,034 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-07 13:58:30,042 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 13:58:30,043 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 13:58:30,044 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 13:58:30,044 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 13:58:30,044 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 13:58:30,044 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 13:58:30,045 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 13:58:30,045 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 13:58:30,045 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 13:58:30,045 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 13:58:30,045 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 13:58:30,046 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 13:58:30,046 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 13:58:30,046 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 13:58:30,046 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 13:58:30,046 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 13:58:30,047 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 13:58:30,047 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 13:58:30,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:58:30,047 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 13:58:30,048 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 13:58:30,048 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 13:58:30,048 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 13:58:30,345 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 13:58:30,359 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 13:58:30,362 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 13:58:30,363 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 13:58:30,364 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 13:58:30,364 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ss2f.c [2020-07-07 13:58:30,427 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07347a600/8f9c1d26c18e4c11896c2a9ff19245e5/FLAGb2f962a83 [2020-07-07 13:58:30,889 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 13:58:30,890 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ss2f.c [2020-07-07 13:58:30,896 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07347a600/8f9c1d26c18e4c11896c2a9ff19245e5/FLAGb2f962a83 [2020-07-07 13:58:31,268 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07347a600/8f9c1d26c18e4c11896c2a9ff19245e5 [2020-07-07 13:58:31,277 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 13:58:31,279 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 13:58:31,280 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 13:58:31,280 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 13:58:31,284 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 13:58:31,285 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:58:31" (1/1) ... [2020-07-07 13:58:31,288 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2936918d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:31, skipping insertion in model container [2020-07-07 13:58:31,288 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:58:31" (1/1) ... [2020-07-07 13:58:31,296 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 13:58:31,316 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 13:58:31,512 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:58:31,521 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 13:58:31,548 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:58:31,568 INFO L208 MainTranslator]: Completed translation [2020-07-07 13:58:31,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:31 WrapperNode [2020-07-07 13:58:31,569 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 13:58:31,569 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 13:58:31,570 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 13:58:31,570 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 13:58:31,676 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:31" (1/1) ... [2020-07-07 13:58:31,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:31" (1/1) ... [2020-07-07 13:58:31,686 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:31" (1/1) ... [2020-07-07 13:58:31,686 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:31" (1/1) ... [2020-07-07 13:58:31,695 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:31" (1/1) ... [2020-07-07 13:58:31,702 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:31" (1/1) ... [2020-07-07 13:58:31,704 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:31" (1/1) ... [2020-07-07 13:58:31,707 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 13:58:31,708 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 13:58:31,708 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 13:58:31,708 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 13:58:31,709 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:31" (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 [2020-07-07 13:58:31,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 13:58:31,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 13:58:31,770 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-07 13:58:31,770 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-07 13:58:31,771 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 13:58:31,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 13:58:31,771 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-07 13:58:31,771 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-07 13:58:31,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-07 13:58:31,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 13:58:31,771 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-07 13:58:31,772 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 13:58:31,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-07 13:58:31,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-07 13:58:31,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-07 13:58:31,772 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-07 13:58:31,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-07 13:58:31,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 13:58:31,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 13:58:32,165 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 13:58:32,165 INFO L295 CfgBuilder]: Removed 7 assume(true) statements. [2020-07-07 13:58:32,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:58:32 BoogieIcfgContainer [2020-07-07 13:58:32,170 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 13:58:32,172 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 13:58:32,172 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 13:58:32,175 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 13:58:32,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 01:58:31" (1/3) ... [2020-07-07 13:58:32,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36db2bb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:58:32, skipping insertion in model container [2020-07-07 13:58:32,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:31" (2/3) ... [2020-07-07 13:58:32,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36db2bb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:58:32, skipping insertion in model container [2020-07-07 13:58:32,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:58:32" (3/3) ... [2020-07-07 13:58:32,179 INFO L109 eAbstractionObserver]: Analyzing ICFG ss2f.c [2020-07-07 13:58:32,189 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 13:58:32,196 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 13:58:32,209 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 13:58:32,230 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 13:58:32,231 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 13:58:32,231 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 13:58:32,231 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 13:58:32,231 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 13:58:32,231 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 13:58:32,231 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 13:58:32,232 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 13:58:32,246 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states. [2020-07-07 13:58:32,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-07 13:58:32,257 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:58:32,258 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] [2020-07-07 13:58:32,258 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:58:32,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:58:32,263 INFO L82 PathProgramCache]: Analyzing trace with hash -456074008, now seen corresponding path program 1 times [2020-07-07 13:58:32,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:58:32,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [865084984] [2020-07-07 13:58:32,270 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:58:32,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:58:32,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:58:32,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:58:32,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:58:32,499 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:58:32,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [865084984] [2020-07-07 13:58:32,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:58:32,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 13:58:32,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513014177] [2020-07-07 13:58:32,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 13:58:32,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:58:32,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 13:58:32,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 13:58:32,531 INFO L87 Difference]: Start difference. First operand 97 states. Second operand 3 states. [2020-07-07 13:58:32,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:58:32,867 INFO L93 Difference]: Finished difference Result 177 states and 208 transitions. [2020-07-07 13:58:32,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 13:58:32,869 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-07-07 13:58:32,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:58:32,883 INFO L225 Difference]: With dead ends: 177 [2020-07-07 13:58:32,884 INFO L226 Difference]: Without dead ends: 88 [2020-07-07 13:58:32,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 13:58:32,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-07 13:58:32,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-07-07 13:58:32,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-07-07 13:58:32,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2020-07-07 13:58:32,955 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 41 [2020-07-07 13:58:32,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:58:32,956 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2020-07-07 13:58:32,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 13:58:32,957 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2020-07-07 13:58:32,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-07 13:58:32,959 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:58:32,959 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] [2020-07-07 13:58:32,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 13:58:32,960 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:58:32,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:58:32,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1964521925, now seen corresponding path program 1 times [2020-07-07 13:58:32,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:58:32,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000762659] [2020-07-07 13:58:32,962 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:58:32,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:58:33,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:58:33,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:58:33,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:58:33,087 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:58:33,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000762659] [2020-07-07 13:58:33,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:58:33,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 13:58:33,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733180019] [2020-07-07 13:58:33,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 13:58:33,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:58:33,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 13:58:33,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:58:33,090 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand 5 states. [2020-07-07 13:58:33,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:58:33,438 INFO L93 Difference]: Finished difference Result 194 states and 212 transitions. [2020-07-07 13:58:33,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 13:58:33,438 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-07-07 13:58:33,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:58:33,442 INFO L225 Difference]: With dead ends: 194 [2020-07-07 13:58:33,442 INFO L226 Difference]: Without dead ends: 134 [2020-07-07 13:58:33,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-07 13:58:33,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-07-07 13:58:33,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 94. [2020-07-07 13:58:33,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-07-07 13:58:33,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2020-07-07 13:58:33,470 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 41 [2020-07-07 13:58:33,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:58:33,470 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2020-07-07 13:58:33,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 13:58:33,471 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2020-07-07 13:58:33,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-07-07 13:58:33,473 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:58:33,474 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, 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] [2020-07-07 13:58:33,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 13:58:33,476 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:58:33,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:58:33,477 INFO L82 PathProgramCache]: Analyzing trace with hash -725795370, now seen corresponding path program 1 times [2020-07-07 13:58:33,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:58:33,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398922205] [2020-07-07 13:58:33,478 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:58:33,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 13:58:33,508 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:442) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:277) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:184) 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) [2020-07-07 13:58:33,516 INFO L168 Benchmark]: Toolchain (without parser) took 2237.14 ms. Allocated memory was 138.9 MB in the beginning and 235.4 MB in the end (delta: 96.5 MB). Free memory was 102.7 MB in the beginning and 172.7 MB in the end (delta: -70.0 MB). Peak memory consumption was 26.5 MB. Max. memory is 7.1 GB. [2020-07-07 13:58:33,518 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 138.9 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-07 13:58:33,519 INFO L168 Benchmark]: CACSL2BoogieTranslator took 289.12 ms. Allocated memory is still 138.9 MB. Free memory was 102.3 MB in the beginning and 91.5 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-07-07 13:58:33,520 INFO L168 Benchmark]: Boogie Preprocessor took 137.93 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 91.5 MB in the beginning and 180.9 MB in the end (delta: -89.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2020-07-07 13:58:33,520 INFO L168 Benchmark]: RCFGBuilder took 462.91 ms. Allocated memory is still 203.4 MB. Free memory was 180.9 MB in the beginning and 156.5 MB in the end (delta: 24.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 7.1 GB. [2020-07-07 13:58:33,521 INFO L168 Benchmark]: TraceAbstraction took 1342.17 ms. Allocated memory was 203.4 MB in the beginning and 235.4 MB in the end (delta: 32.0 MB). Free memory was 155.9 MB in the beginning and 172.7 MB in the end (delta: -16.8 MB). Peak memory consumption was 15.2 MB. Max. memory is 7.1 GB. [2020-07-07 13:58:33,526 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 138.9 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 289.12 ms. Allocated memory is still 138.9 MB. Free memory was 102.3 MB in the beginning and 91.5 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 137.93 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 91.5 MB in the beginning and 180.9 MB in the end (delta: -89.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 462.91 ms. Allocated memory is still 203.4 MB. Free memory was 180.9 MB in the beginning and 156.5 MB in the end (delta: 24.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1342.17 ms. Allocated memory was 203.4 MB in the beginning and 235.4 MB in the end (delta: 32.0 MB). Free memory was 155.9 MB in the beginning and 172.7 MB in the end (delta: -16.8 MB). Peak memory consumption was 15.2 MB. 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:442) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...