/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/modnf.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 13:57:59,893 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 13:57:59,896 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 13:57:59,914 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 13:57:59,915 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 13:57:59,917 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 13:57:59,919 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 13:57:59,929 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 13:57:59,932 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 13:57:59,935 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 13:57:59,937 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 13:57:59,940 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 13:57:59,940 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 13:57:59,942 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 13:57:59,944 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 13:57:59,946 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 13:57:59,947 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 13:57:59,948 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 13:57:59,950 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 13:57:59,955 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 13:57:59,962 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 13:57:59,966 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 13:57:59,967 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 13:57:59,968 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 13:57:59,971 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-07 13:57:59,972 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-07 13:57:59,972 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-07 13:57:59,975 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-07 13:57:59,975 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-07 13:57:59,977 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-07 13:57:59,977 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-07 13:57:59,978 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-07 13:57:59,979 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-07 13:57:59,980 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-07 13:57:59,981 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-07 13:57:59,982 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-07 13:57:59,982 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-07 13:57:59,983 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-07 13:57:59,983 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 13:57:59,984 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 13:57:59,985 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 13:57:59,986 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 13:58:00,009 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 13:58:00,013 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 13:58:00,015 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 13:58:00,015 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 13:58:00,015 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 13:58:00,016 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 13:58:00,016 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 13:58:00,016 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 13:58:00,016 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 13:58:00,016 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 13:58:00,017 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 13:58:00,017 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 13:58:00,017 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 13:58:00,022 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 13:58:00,023 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 13:58:00,023 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 13:58:00,023 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 13:58:00,023 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 13:58:00,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:58:00,024 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 13:58:00,024 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 13:58:00,024 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 13:58:00,024 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 13:58:00,304 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 13:58:00,315 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 13:58:00,319 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 13:58:00,320 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 13:58:00,321 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 13:58:00,322 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/modnf.c [2020-07-07 13:58:00,402 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47e9d285c/b541830815364e18ba97f6eda23e2ece/FLAG75504afe4 [2020-07-07 13:58:00,851 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 13:58:00,851 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/modnf.c [2020-07-07 13:58:00,856 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47e9d285c/b541830815364e18ba97f6eda23e2ece/FLAG75504afe4 [2020-07-07 13:58:01,232 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47e9d285c/b541830815364e18ba97f6eda23e2ece [2020-07-07 13:58:01,243 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 13:58:01,245 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 13:58:01,246 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 13:58:01,246 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 13:58:01,250 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 13:58:01,250 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:58:01" (1/1) ... [2020-07-07 13:58:01,253 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e2e350c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:01, skipping insertion in model container [2020-07-07 13:58:01,254 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:58:01" (1/1) ... [2020-07-07 13:58:01,261 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 13:58:01,280 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 13:58:01,509 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:58:01,519 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 13:58:01,540 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:58:01,557 INFO L208 MainTranslator]: Completed translation [2020-07-07 13:58:01,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:01 WrapperNode [2020-07-07 13:58:01,557 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 13:58:01,558 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 13:58:01,558 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 13:58:01,558 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 13:58:01,655 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:01" (1/1) ... [2020-07-07 13:58:01,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:01" (1/1) ... [2020-07-07 13:58:01,668 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:01" (1/1) ... [2020-07-07 13:58:01,669 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:01" (1/1) ... [2020-07-07 13:58:01,676 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:01" (1/1) ... [2020-07-07 13:58:01,682 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:01" (1/1) ... [2020-07-07 13:58:01,684 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:01" (1/1) ... [2020-07-07 13:58:01,686 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 13:58:01,686 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 13:58:01,686 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 13:58:01,687 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 13:58:01,688 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:01" (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 13:58:01,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 13:58:01,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 13:58:01,747 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-07 13:58:01,747 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-07 13:58:01,747 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 13:58:01,747 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 13:58:01,747 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-07 13:58:01,748 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-07 13:58:01,748 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-07 13:58:01,748 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 13:58:01,748 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-07 13:58:01,748 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 13:58:01,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-07 13:58:01,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-07 13:58:01,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-07 13:58:01,749 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-07 13:58:01,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-07 13:58:01,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 13:58:01,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 13:58:02,113 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 13:58:02,113 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-07 13:58:02,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:58:02 BoogieIcfgContainer [2020-07-07 13:58:02,118 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 13:58:02,119 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 13:58:02,119 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 13:58:02,122 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 13:58:02,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 01:58:01" (1/3) ... [2020-07-07 13:58:02,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@565430c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:58:02, skipping insertion in model container [2020-07-07 13:58:02,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:58:01" (2/3) ... [2020-07-07 13:58:02,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@565430c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:58:02, skipping insertion in model container [2020-07-07 13:58:02,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:58:02" (3/3) ... [2020-07-07 13:58:02,126 INFO L109 eAbstractionObserver]: Analyzing ICFG modnf.c [2020-07-07 13:58:02,137 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 13:58:02,144 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 13:58:02,158 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 13:58:02,180 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 13:58:02,180 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 13:58:02,181 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 13:58:02,181 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 13:58:02,181 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 13:58:02,181 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 13:58:02,181 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 13:58:02,181 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 13:58:02,198 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-07-07 13:58:02,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-07 13:58:02,209 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:58:02,209 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] [2020-07-07 13:58:02,210 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:58:02,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:58:02,215 INFO L82 PathProgramCache]: Analyzing trace with hash 864246722, now seen corresponding path program 1 times [2020-07-07 13:58:02,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:58:02,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355562281] [2020-07-07 13:58:02,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:58:02,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:58:02,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:58:02,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:58:02,475 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 13:58:02,475 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:58:02,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355562281] [2020-07-07 13:58:02,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:58:02,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 13:58:02,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862390024] [2020-07-07 13:58:02,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 13:58:02,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:58:02,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 13:58:02,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 13:58:02,500 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 3 states. [2020-07-07 13:58:02,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:58:02,670 INFO L93 Difference]: Finished difference Result 105 states and 120 transitions. [2020-07-07 13:58:02,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 13:58:02,672 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-07-07 13:58:02,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:58:02,682 INFO L225 Difference]: With dead ends: 105 [2020-07-07 13:58:02,683 INFO L226 Difference]: Without dead ends: 52 [2020-07-07 13:58:02,687 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 13:58:02,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-07 13:58:02,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-07-07 13:58:02,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-07 13:58:02,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-07-07 13:58:02,735 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 33 [2020-07-07 13:58:02,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:58:02,735 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-07-07 13:58:02,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 13:58:02,736 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-07-07 13:58:02,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-07 13:58:02,737 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:58:02,738 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] [2020-07-07 13:58:02,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 13:58:02,738 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:58:02,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:58:02,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1269072019, now seen corresponding path program 1 times [2020-07-07 13:58:02,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:58:02,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233163729] [2020-07-07 13:58:02,741 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:58:02,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:58:02,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:58:02,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:58:02,876 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 13:58:02,876 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:58:02,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233163729] [2020-07-07 13:58:02,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:58:02,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 13:58:02,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574903945] [2020-07-07 13:58:02,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 13:58:02,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:58:02,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 13:58:02,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:58:02,880 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 5 states. [2020-07-07 13:58:03,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:58:03,100 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2020-07-07 13:58:03,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 13:58:03,101 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-07-07 13:58:03,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:58:03,105 INFO L225 Difference]: With dead ends: 92 [2020-07-07 13:58:03,105 INFO L226 Difference]: Without dead ends: 70 [2020-07-07 13:58:03,107 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 13:58:03,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-07 13:58:03,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 54. [2020-07-07 13:58:03,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-07 13:58:03,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-07-07 13:58:03,128 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 33 [2020-07-07 13:58:03,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:58:03,128 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-07-07 13:58:03,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 13:58:03,129 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-07-07 13:58:03,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-07-07 13:58:03,130 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:58:03,131 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] [2020-07-07 13:58:03,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 13:58:03,131 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:58:03,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:58:03,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1661969402, now seen corresponding path program 1 times [2020-07-07 13:58:03,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:58:03,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566510612] [2020-07-07 13:58:03,133 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:58:03,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 13:58:03,190 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 13:58:03,197 INFO L168 Benchmark]: Toolchain (without parser) took 1951.20 ms. Allocated memory was 140.0 MB in the beginning and 234.9 MB in the end (delta: 94.9 MB). Free memory was 105.5 MB in the beginning and 203.7 MB in the end (delta: -98.2 MB). Peak memory consumption was 83.5 MB. Max. memory is 7.1 GB. [2020-07-07 13:58:03,199 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 140.0 MB. Free memory was 123.4 MB in the beginning and 123.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-07 13:58:03,201 INFO L168 Benchmark]: CACSL2BoogieTranslator took 311.99 ms. Allocated memory is still 140.0 MB. Free memory was 105.3 MB in the beginning and 94.8 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-07-07 13:58:03,203 INFO L168 Benchmark]: Boogie Preprocessor took 127.86 ms. Allocated memory was 140.0 MB in the beginning and 203.9 MB in the end (delta: 64.0 MB). Free memory was 94.8 MB in the beginning and 182.1 MB in the end (delta: -87.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2020-07-07 13:58:03,204 INFO L168 Benchmark]: RCFGBuilder took 431.42 ms. Allocated memory is still 203.9 MB. Free memory was 182.1 MB in the beginning and 163.0 MB in the end (delta: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 7.1 GB. [2020-07-07 13:58:03,206 INFO L168 Benchmark]: TraceAbstraction took 1074.99 ms. Allocated memory was 203.9 MB in the beginning and 234.9 MB in the end (delta: 30.9 MB). Free memory was 162.4 MB in the beginning and 203.7 MB in the end (delta: -41.3 MB). Peak memory consumption was 76.5 MB. Max. memory is 7.1 GB. [2020-07-07 13:58:03,216 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 140.0 MB. Free memory was 123.4 MB in the beginning and 123.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 311.99 ms. Allocated memory is still 140.0 MB. Free memory was 105.3 MB in the beginning and 94.8 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 127.86 ms. Allocated memory was 140.0 MB in the beginning and 203.9 MB in the end (delta: 64.0 MB). Free memory was 94.8 MB in the beginning and 182.1 MB in the end (delta: -87.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 431.42 ms. Allocated memory is still 203.9 MB. Free memory was 182.1 MB in the beginning and 163.0 MB in the end (delta: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1074.99 ms. Allocated memory was 203.9 MB in the beginning and 234.9 MB in the end (delta: 30.9 MB). Free memory was 162.4 MB in the beginning and 203.7 MB in the end (delta: -41.3 MB). Peak memory consumption was 76.5 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...