/usr/bin/java -ea -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/nsqm-iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-18 00:47:27,359 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-18 00:47:27,362 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-18 00:47:27,381 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-18 00:47:27,381 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-18 00:47:27,383 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-18 00:47:27,384 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-18 00:47:27,386 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-18 00:47:27,387 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-18 00:47:27,388 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-18 00:47:27,389 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-18 00:47:27,390 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-18 00:47:27,390 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-18 00:47:27,391 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-18 00:47:27,392 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-18 00:47:27,393 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-18 00:47:27,394 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-18 00:47:27,395 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-18 00:47:27,397 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-18 00:47:27,399 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-18 00:47:27,401 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-18 00:47:27,402 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-18 00:47:27,403 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-18 00:47:27,403 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-18 00:47:27,406 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-18 00:47:27,413 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-18 00:47:27,414 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-18 00:47:27,415 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-18 00:47:27,416 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-18 00:47:27,424 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-18 00:47:27,425 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-18 00:47:27,426 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-18 00:47:27,426 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-18 00:47:27,426 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-18 00:47:27,427 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-18 00:47:27,427 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-18 00:47:27,427 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-18 00:47:27,427 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-18 00:47:27,427 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-18 00:47:27,427 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-18 00:47:27,428 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-18 00:47:27,428 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-18 00:47:27,428 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-18 00:47:27,428 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-18 00:47:27,428 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-18 00:47:27,429 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-18 00:47:27,429 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-18 00:47:27,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-18 00:47:27,429 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-18 00:47:27,429 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-18 00:47:27,430 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-18 00:47:27,430 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-18 00:47:27,699 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-18 00:47:27,712 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-18 00:47:27,715 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-18 00:47:27,716 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-18 00:47:27,717 INFO L275 PluginConnector]: CDTParser initialized [2020-07-18 00:47:27,717 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/nsqm-iff.c [2020-07-18 00:47:27,787 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55a69e00f/5629d51617954ae689b4bcfda48bbc3e/FLAGd869f661f [2020-07-18 00:47:28,265 INFO L306 CDTParser]: Found 1 translation units. [2020-07-18 00:47:28,266 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/nsqm-iff.c [2020-07-18 00:47:28,273 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55a69e00f/5629d51617954ae689b4bcfda48bbc3e/FLAGd869f661f [2020-07-18 00:47:28,603 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55a69e00f/5629d51617954ae689b4bcfda48bbc3e [2020-07-18 00:47:28,612 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-18 00:47:28,615 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-18 00:47:28,617 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-18 00:47:28,617 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-18 00:47:28,620 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-18 00:47:28,621 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.07 12:47:28" (1/1) ... [2020-07-18 00:47:28,624 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1af6619f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:47:28, skipping insertion in model container [2020-07-18 00:47:28,625 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.07 12:47:28" (1/1) ... [2020-07-18 00:47:28,632 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-18 00:47:28,650 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-18 00:47:28,824 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-18 00:47:28,836 INFO L203 MainTranslator]: Completed pre-run [2020-07-18 00:47:28,869 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-18 00:47:28,886 INFO L208 MainTranslator]: Completed translation [2020-07-18 00:47:28,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:47:28 WrapperNode [2020-07-18 00:47:28,886 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-18 00:47:28,887 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-18 00:47:28,887 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-18 00:47:28,887 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-18 00:47:28,978 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:47:28" (1/1) ... [2020-07-18 00:47:28,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:47:28" (1/1) ... [2020-07-18 00:47:28,986 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:47:28" (1/1) ... [2020-07-18 00:47:28,986 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:47:28" (1/1) ... [2020-07-18 00:47:28,999 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:47:28" (1/1) ... [2020-07-18 00:47:29,005 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:47:28" (1/1) ... [2020-07-18 00:47:29,006 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:47:28" (1/1) ... [2020-07-18 00:47:29,009 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-18 00:47:29,009 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-18 00:47:29,009 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-18 00:47:29,010 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-18 00:47:29,010 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:47:28" (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 [2020-07-18 00:47:29,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-18 00:47:29,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-18 00:47:29,069 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-18 00:47:29,070 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-18 00:47:29,070 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-18 00:47:29,070 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-18 00:47:29,070 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-18 00:47:29,070 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-18 00:47:29,070 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-18 00:47:29,071 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-18 00:47:29,071 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-18 00:47:29,071 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-18 00:47:29,071 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-18 00:47:29,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-18 00:47:29,071 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-18 00:47:29,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-18 00:47:29,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-18 00:47:29,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-18 00:47:29,500 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-18 00:47:29,500 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-18 00:47:29,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.07 12:47:29 BoogieIcfgContainer [2020-07-18 00:47:29,504 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-18 00:47:29,506 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-18 00:47:29,506 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-18 00:47:29,509 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-18 00:47:29,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.07 12:47:28" (1/3) ... [2020-07-18 00:47:29,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d89f4c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.07 12:47:29, skipping insertion in model container [2020-07-18 00:47:29,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:47:28" (2/3) ... [2020-07-18 00:47:29,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d89f4c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.07 12:47:29, skipping insertion in model container [2020-07-18 00:47:29,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.07 12:47:29" (3/3) ... [2020-07-18 00:47:29,512 INFO L109 eAbstractionObserver]: Analyzing ICFG nsqm-iff.c [2020-07-18 00:47:29,525 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-18 00:47:29,533 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-18 00:47:29,547 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-18 00:47:29,568 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-18 00:47:29,568 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-18 00:47:29,569 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-18 00:47:29,569 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-18 00:47:29,569 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-18 00:47:29,569 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-18 00:47:29,569 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-18 00:47:29,570 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-18 00:47:29,586 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states. [2020-07-18 00:47:29,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-18 00:47:29,596 INFO L414 BasicCegarLoop]: Found error trace [2020-07-18 00:47:29,597 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] [2020-07-18 00:47:29,598 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-18 00:47:29,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-18 00:47:29,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1150160147, now seen corresponding path program 1 times [2020-07-18 00:47:29,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-18 00:47:29,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746196444] [2020-07-18 00:47:29,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-18 00:47:29,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-18 00:47:29,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-18 00:47:29,909 INFO L280 TraceCheckUtils]: 0: Hoare triple {82#(and (= |#valid| |old(#valid)|) (= |#NULL.base| |old(#NULL.base)|) (= ~N~0 |old(~N~0)|) (= |#NULL.offset| |old(#NULL.offset)|))} #NULL.base, #NULL.offset := 0, 0; {68#true} is VALID [2020-07-18 00:47:29,909 INFO L280 TraceCheckUtils]: 1: Hoare triple {68#true} #valid := #valid[0 := 0]; {68#true} is VALID [2020-07-18 00:47:29,910 INFO L280 TraceCheckUtils]: 2: Hoare triple {68#true} assume 0 < #StackHeapBarrier; {68#true} is VALID [2020-07-18 00:47:29,910 INFO L280 TraceCheckUtils]: 3: Hoare triple {68#true} ~N~0 := 0; {68#true} is VALID [2020-07-18 00:47:29,911 INFO L280 TraceCheckUtils]: 4: Hoare triple {68#true} assume true; {68#true} is VALID [2020-07-18 00:47:29,911 INFO L275 TraceCheckUtils]: 5: Hoare quadruple {68#true} {68#true} #120#return; {68#true} is VALID [2020-07-18 00:47:29,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-18 00:47:29,925 INFO L280 TraceCheckUtils]: 0: Hoare triple {68#true} ~cond := #in~cond; {68#true} is VALID [2020-07-18 00:47:29,926 INFO L280 TraceCheckUtils]: 1: Hoare triple {68#true} assume !(0 == ~cond); {68#true} is VALID [2020-07-18 00:47:29,926 INFO L280 TraceCheckUtils]: 2: Hoare triple {68#true} assume true; {68#true} is VALID [2020-07-18 00:47:29,928 INFO L275 TraceCheckUtils]: 3: Hoare quadruple {68#true} {76#(<= 1 ~N~0)} #116#return; {76#(<= 1 ~N~0)} is VALID [2020-07-18 00:47:29,930 INFO L263 TraceCheckUtils]: 0: Hoare triple {68#true} call ULTIMATE.init(); {82#(and (= |#valid| |old(#valid)|) (= |#NULL.base| |old(#NULL.base)|) (= ~N~0 |old(~N~0)|) (= |#NULL.offset| |old(#NULL.offset)|))} is VALID [2020-07-18 00:47:29,930 INFO L280 TraceCheckUtils]: 1: Hoare triple {82#(and (= |#valid| |old(#valid)|) (= |#NULL.base| |old(#NULL.base)|) (= ~N~0 |old(~N~0)|) (= |#NULL.offset| |old(#NULL.offset)|))} #NULL.base, #NULL.offset := 0, 0; {68#true} is VALID [2020-07-18 00:47:29,931 INFO L280 TraceCheckUtils]: 2: Hoare triple {68#true} #valid := #valid[0 := 0]; {68#true} is VALID [2020-07-18 00:47:29,931 INFO L280 TraceCheckUtils]: 3: Hoare triple {68#true} assume 0 < #StackHeapBarrier; {68#true} is VALID [2020-07-18 00:47:29,931 INFO L280 TraceCheckUtils]: 4: Hoare triple {68#true} ~N~0 := 0; {68#true} is VALID [2020-07-18 00:47:29,932 INFO L280 TraceCheckUtils]: 5: Hoare triple {68#true} assume true; {68#true} is VALID [2020-07-18 00:47:29,932 INFO L275 TraceCheckUtils]: 6: Hoare quadruple {68#true} {68#true} #120#return; {68#true} is VALID [2020-07-18 00:47:29,933 INFO L263 TraceCheckUtils]: 7: Hoare triple {68#true} call #t~ret10 := main(); {68#true} is VALID [2020-07-18 00:47:29,933 INFO L280 TraceCheckUtils]: 8: Hoare triple {68#true} assume -2147483648 <= #t~nondet0 && #t~nondet0 <= 2147483647; {68#true} is VALID [2020-07-18 00:47:29,934 INFO L280 TraceCheckUtils]: 9: Hoare triple {68#true} ~N~0 := #t~nondet0; {68#true} is VALID [2020-07-18 00:47:29,934 INFO L280 TraceCheckUtils]: 10: Hoare triple {68#true} havoc #t~nondet0; {68#true} is VALID [2020-07-18 00:47:29,936 INFO L280 TraceCheckUtils]: 11: Hoare triple {68#true} assume !(~N~0 <= 0); {76#(<= 1 ~N~0)} is VALID [2020-07-18 00:47:29,936 INFO L263 TraceCheckUtils]: 12: Hoare triple {76#(<= 1 ~N~0)} call assume_abort_if_not((if ~N~0 <= 536870911 then 1 else 0)); {68#true} is VALID [2020-07-18 00:47:29,937 INFO L280 TraceCheckUtils]: 13: Hoare triple {68#true} ~cond := #in~cond; {68#true} is VALID [2020-07-18 00:47:29,937 INFO L280 TraceCheckUtils]: 14: Hoare triple {68#true} assume !(0 == ~cond); {68#true} is VALID [2020-07-18 00:47:29,938 INFO L280 TraceCheckUtils]: 15: Hoare triple {68#true} assume true; {68#true} is VALID [2020-07-18 00:47:29,939 INFO L275 TraceCheckUtils]: 16: Hoare quadruple {68#true} {76#(<= 1 ~N~0)} #116#return; {76#(<= 1 ~N~0)} is VALID [2020-07-18 00:47:29,940 INFO L280 TraceCheckUtils]: 17: Hoare triple {76#(<= 1 ~N~0)} havoc ~i~0; {76#(<= 1 ~N~0)} is VALID [2020-07-18 00:47:29,941 INFO L280 TraceCheckUtils]: 18: Hoare triple {76#(<= 1 ~N~0)} SUMMARY for call #t~malloc1.base, #t~malloc1.offset := #Ultimate.allocOnHeap(8 * ~N~0); srcloc: L26 {76#(<= 1 ~N~0)} is VALID [2020-07-18 00:47:29,942 INFO L280 TraceCheckUtils]: 19: Hoare triple {76#(<= 1 ~N~0)} ~a~0.base, ~a~0.offset := #t~malloc1.base, #t~malloc1.offset; {76#(<= 1 ~N~0)} is VALID [2020-07-18 00:47:29,943 INFO L280 TraceCheckUtils]: 20: Hoare triple {76#(<= 1 ~N~0)} SUMMARY for call #t~malloc2.base, #t~malloc2.offset := #Ultimate.allocOnHeap(8 * ~N~0); srcloc: L27 {76#(<= 1 ~N~0)} is VALID [2020-07-18 00:47:29,944 INFO L280 TraceCheckUtils]: 21: Hoare triple {76#(<= 1 ~N~0)} ~b~0.base, ~b~0.offset := #t~malloc2.base, #t~malloc2.offset; {76#(<= 1 ~N~0)} is VALID [2020-07-18 00:47:29,945 INFO L280 TraceCheckUtils]: 22: Hoare triple {76#(<= 1 ~N~0)} ~i~0 := 0; {81#(and (= 0 main_~i~0) (<= 1 ~N~0))} is VALID [2020-07-18 00:47:29,947 INFO L280 TraceCheckUtils]: 23: Hoare triple {81#(and (= 0 main_~i~0) (<= 1 ~N~0))} assume !(~i~0 < ~N~0); {69#false} is VALID [2020-07-18 00:47:29,947 INFO L280 TraceCheckUtils]: 24: Hoare triple {69#false} ~i~0 := 0; {69#false} is VALID [2020-07-18 00:47:29,948 INFO L280 TraceCheckUtils]: 25: Hoare triple {69#false} assume !(~i~0 < ~N~0); {69#false} is VALID [2020-07-18 00:47:29,948 INFO L280 TraceCheckUtils]: 26: Hoare triple {69#false} ~i~0 := 0; {69#false} is VALID [2020-07-18 00:47:29,949 INFO L280 TraceCheckUtils]: 27: Hoare triple {69#false} assume !!(~i~0 < ~N~0); {69#false} is VALID [2020-07-18 00:47:29,949 INFO L280 TraceCheckUtils]: 28: Hoare triple {69#false} SUMMARY for call #t~mem9 := read~int(~a~0.base, ~a~0.offset + 8 * ~i~0, 8); srcloc: L49 {69#false} is VALID [2020-07-18 00:47:29,950 INFO L263 TraceCheckUtils]: 29: Hoare triple {69#false} call __VERIFIER_assert((if #t~mem9 == (1 + ~i~0) * (1 + ~i~0) then 1 else 0)); {69#false} is VALID [2020-07-18 00:47:29,950 INFO L280 TraceCheckUtils]: 30: Hoare triple {69#false} ~cond := #in~cond; {69#false} is VALID [2020-07-18 00:47:29,951 INFO L280 TraceCheckUtils]: 31: Hoare triple {69#false} assume 0 == ~cond; {69#false} is VALID [2020-07-18 00:47:29,951 INFO L280 TraceCheckUtils]: 32: Hoare triple {69#false} assume !false; {69#false} is VALID [2020-07-18 00:47:29,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-18 00:47:29,964 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-18 00:47:29,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746196444] [2020-07-18 00:47:29,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-18 00:47:29,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-18 00:47:29,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697837215] [2020-07-18 00:47:29,975 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-07-18 00:47:29,978 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-18 00:47:29,982 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 5 states. [2020-07-18 00:47:30,045 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 33 edges. 33 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-18 00:47:30,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-18 00:47:30,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-18 00:47:30,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-18 00:47:30,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-18 00:47:30,059 INFO L87 Difference]: Start difference. First operand 65 states. Second operand 5 states. [2020-07-18 00:47:30,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-18 00:47:30,805 INFO L93 Difference]: Finished difference Result 131 states and 159 transitions. [2020-07-18 00:47:30,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-18 00:47:30,806 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-07-18 00:47:30,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-18 00:47:30,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-07-18 00:47:30,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2020-07-18 00:47:30,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-07-18 00:47:30,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2020-07-18 00:47:30,831 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 6 states and 159 transitions. [2020-07-18 00:47:31,028 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 159 edges. 159 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-18 00:47:31,043 INFO L225 Difference]: With dead ends: 131 [2020-07-18 00:47:31,043 INFO L226 Difference]: Without dead ends: 72 [2020-07-18 00:47:31,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-18 00:47:31,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-18 00:47:31,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 62. [2020-07-18 00:47:31,204 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-18 00:47:31,205 INFO L82 GeneralOperation]: Start isEquivalent. First operand 72 states. Second operand 62 states. [2020-07-18 00:47:31,206 INFO L74 IsIncluded]: Start isIncluded. First operand 72 states. Second operand 62 states. [2020-07-18 00:47:31,206 INFO L87 Difference]: Start difference. First operand 72 states. Second operand 62 states. [2020-07-18 00:47:31,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-18 00:47:31,213 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2020-07-18 00:47:31,213 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2020-07-18 00:47:31,214 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-18 00:47:31,215 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-18 00:47:31,215 INFO L74 IsIncluded]: Start isIncluded. First operand 62 states. Second operand 72 states. [2020-07-18 00:47:31,215 INFO L87 Difference]: Start difference. First operand 62 states. Second operand 72 states. [2020-07-18 00:47:31,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-18 00:47:31,222 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2020-07-18 00:47:31,222 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2020-07-18 00:47:31,223 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-18 00:47:31,223 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-18 00:47:31,223 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-18 00:47:31,224 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-18 00:47:31,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-07-18 00:47:31,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-07-18 00:47:31,229 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 33 [2020-07-18 00:47:31,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-18 00:47:31,230 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-07-18 00:47:31,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-18 00:47:31,230 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 62 states and 66 transitions. [2020-07-18 00:47:31,313 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 66 edges. 66 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-18 00:47:31,313 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-07-18 00:47:31,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-18 00:47:31,315 INFO L414 BasicCegarLoop]: Found error trace [2020-07-18 00:47:31,315 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] [2020-07-18 00:47:31,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-18 00:47:31,316 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-18 00:47:31,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-18 00:47:31,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1596799413, now seen corresponding path program 1 times [2020-07-18 00:47:31,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-18 00:47:31,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647047666] [2020-07-18 00:47:31,317 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-18 00:47:31,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-18 00:47:31,351 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$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-07-18 00:47:31,357 INFO L168 Benchmark]: Toolchain (without parser) took 2742.34 ms. Allocated memory was 146.3 MB in the beginning and 245.4 MB in the end (delta: 99.1 MB). Free memory was 104.5 MB in the beginning and 196.7 MB in the end (delta: -92.2 MB). Peak memory consumption was 6.9 MB. Max. memory is 7.1 GB. [2020-07-18 00:47:31,358 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 146.3 MB. Free memory is still 122.5 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-18 00:47:31,359 INFO L168 Benchmark]: CACSL2BoogieTranslator took 270.15 ms. Allocated memory is still 146.3 MB. Free memory was 104.1 MB in the beginning and 93.2 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-07-18 00:47:31,360 INFO L168 Benchmark]: Boogie Preprocessor took 121.83 ms. Allocated memory was 146.3 MB in the beginning and 202.4 MB in the end (delta: 56.1 MB). Free memory was 93.2 MB in the beginning and 180.0 MB in the end (delta: -86.9 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-18 00:47:31,361 INFO L168 Benchmark]: RCFGBuilder took 495.34 ms. Allocated memory is still 202.4 MB. Free memory was 180.0 MB in the beginning and 149.6 MB in the end (delta: 30.5 MB). Peak memory consumption was 30.5 MB. Max. memory is 7.1 GB. [2020-07-18 00:47:31,361 INFO L168 Benchmark]: TraceAbstraction took 1848.29 ms. Allocated memory was 202.4 MB in the beginning and 245.4 MB in the end (delta: 43.0 MB). Free memory was 149.6 MB in the beginning and 196.7 MB in the end (delta: -47.1 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-18 00:47:31,365 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - AssertionsEnabledResult: Assertions are enabled Assertions are enabled - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 146.3 MB. Free memory is still 122.5 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 270.15 ms. Allocated memory is still 146.3 MB. Free memory was 104.1 MB in the beginning and 93.2 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 121.83 ms. Allocated memory was 146.3 MB in the beginning and 202.4 MB in the end (delta: 56.1 MB). Free memory was 93.2 MB in the beginning and 180.0 MB in the end (delta: -86.9 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 495.34 ms. Allocated memory is still 202.4 MB. Free memory was 180.0 MB in the beginning and 149.6 MB in the end (delta: 30.5 MB). Peak memory consumption was 30.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1848.29 ms. Allocated memory was 202.4 MB in the beginning and 245.4 MB in the end (delta: 43.0 MB). Free memory was 149.6 MB in the beginning and 196.7 MB in the end (delta: -47.1 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...