/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/ifeqn2f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-8fc6572 [2020-07-10 20:21:02,552 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-10 20:21:02,555 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-10 20:21:02,568 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-10 20:21:02,569 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-10 20:21:02,570 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-10 20:21:02,571 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-10 20:21:02,573 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-10 20:21:02,576 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-10 20:21:02,577 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-10 20:21:02,578 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-10 20:21:02,579 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-10 20:21:02,579 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-10 20:21:02,581 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-10 20:21:02,582 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-10 20:21:02,583 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-10 20:21:02,584 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-10 20:21:02,585 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-10 20:21:02,587 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-10 20:21:02,589 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-10 20:21:02,591 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-10 20:21:02,592 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-10 20:21:02,593 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-10 20:21:02,594 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-10 20:21:02,598 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-10 20:21:02,607 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-10 20:21:02,608 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-10 20:21:02,609 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-10 20:21:02,610 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-10 20:21:02,620 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-10 20:21:02,621 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-10 20:21:02,622 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-10 20:21:02,623 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-10 20:21:02,623 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-10 20:21:02,623 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-10 20:21:02,623 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-10 20:21:02,624 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-10 20:21:02,624 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-10 20:21:02,624 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-10 20:21:02,624 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-10 20:21:02,625 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-10 20:21:02,625 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-10 20:21:02,625 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-10 20:21:02,625 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-10 20:21:02,626 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-10 20:21:02,626 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-10 20:21:02,626 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-10 20:21:02,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-10 20:21:02,626 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-10 20:21:02,627 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-10 20:21:02,627 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-10 20:21:02,627 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-10 20:21:02,932 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-10 20:21:02,953 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-10 20:21:02,960 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-10 20:21:02,961 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-10 20:21:02,961 INFO L275 PluginConnector]: CDTParser initialized [2020-07-10 20:21:02,962 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ifeqn2f.c [2020-07-10 20:21:03,041 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1f6207c5/87b7184f24ed4f9fb70fa1dde142a257/FLAG11c87356c [2020-07-10 20:21:03,555 INFO L306 CDTParser]: Found 1 translation units. [2020-07-10 20:21:03,556 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ifeqn2f.c [2020-07-10 20:21:03,564 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1f6207c5/87b7184f24ed4f9fb70fa1dde142a257/FLAG11c87356c [2020-07-10 20:21:03,947 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1f6207c5/87b7184f24ed4f9fb70fa1dde142a257 [2020-07-10 20:21:03,959 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-10 20:21:03,961 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-10 20:21:03,963 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-10 20:21:03,964 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-10 20:21:03,969 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-10 20:21:03,971 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.07 08:21:03" (1/1) ... [2020-07-10 20:21:03,976 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cac8201 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 08:21:03, skipping insertion in model container [2020-07-10 20:21:03,976 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.07 08:21:03" (1/1) ... [2020-07-10 20:21:03,986 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-10 20:21:04,005 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-10 20:21:04,260 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-10 20:21:04,279 INFO L203 MainTranslator]: Completed pre-run [2020-07-10 20:21:04,328 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-10 20:21:04,349 INFO L208 MainTranslator]: Completed translation [2020-07-10 20:21:04,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 08:21:04 WrapperNode [2020-07-10 20:21:04,350 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-10 20:21:04,351 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-10 20:21:04,351 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-10 20:21:04,351 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-10 20:21:04,493 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 08:21:04" (1/1) ... [2020-07-10 20:21:04,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 08:21:04" (1/1) ... [2020-07-10 20:21:04,506 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 08:21:04" (1/1) ... [2020-07-10 20:21:04,506 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 08:21:04" (1/1) ... [2020-07-10 20:21:04,534 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 08:21:04" (1/1) ... [2020-07-10 20:21:04,549 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 08:21:04" (1/1) ... [2020-07-10 20:21:04,555 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 08:21:04" (1/1) ... [2020-07-10 20:21:04,559 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-10 20:21:04,560 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-10 20:21:04,560 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-10 20:21:04,560 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-10 20:21:04,563 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 08:21:04" (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 [2020-07-10 20:21:04,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-10 20:21:04,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-10 20:21:04,647 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-10 20:21:04,647 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-10 20:21:04,647 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-10 20:21:04,648 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-10 20:21:04,648 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-10 20:21:04,648 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-10 20:21:04,648 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-10 20:21:04,648 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-10 20:21:04,648 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-10 20:21:04,649 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-10 20:21:04,649 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-10 20:21:04,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-10 20:21:04,649 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-10 20:21:04,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-10 20:21:04,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-10 20:21:04,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-10 20:21:05,184 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-10 20:21:05,184 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-10 20:21:05,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.07 08:21:05 BoogieIcfgContainer [2020-07-10 20:21:05,189 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-10 20:21:05,190 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-10 20:21:05,190 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-10 20:21:05,194 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-10 20:21:05,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.07 08:21:03" (1/3) ... [2020-07-10 20:21:05,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75d55f16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.07 08:21:05, skipping insertion in model container [2020-07-10 20:21:05,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 08:21:04" (2/3) ... [2020-07-10 20:21:05,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75d55f16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.07 08:21:05, skipping insertion in model container [2020-07-10 20:21:05,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.07 08:21:05" (3/3) ... [2020-07-10 20:21:05,198 INFO L109 eAbstractionObserver]: Analyzing ICFG ifeqn2f.c [2020-07-10 20:21:05,210 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-10 20:21:05,220 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-10 20:21:05,235 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-10 20:21:05,260 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-10 20:21:05,260 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-10 20:21:05,260 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-10 20:21:05,260 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-10 20:21:05,261 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-10 20:21:05,261 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-10 20:21:05,261 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-10 20:21:05,262 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-10 20:21:05,279 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states. [2020-07-10 20:21:05,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-10 20:21:05,292 INFO L414 BasicCegarLoop]: Found error trace [2020-07-10 20:21:05,294 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] [2020-07-10 20:21:05,294 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-10 20:21:05,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-10 20:21:05,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1150160147, now seen corresponding path program 1 times [2020-07-10 20:21:05,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-10 20:21:05,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867247995] [2020-07-10 20:21:05,313 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-10 20:21:05,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 20:21:05,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 20:21:05,608 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 [2020-07-10 20:21:05,609 INFO L280 TraceCheckUtils]: 1: Hoare triple {68#true} #valid := #valid[0 := 0]; {68#true} is VALID [2020-07-10 20:21:05,610 INFO L280 TraceCheckUtils]: 2: Hoare triple {68#true} assume 0 < #StackHeapBarrier; {68#true} is VALID [2020-07-10 20:21:05,610 INFO L280 TraceCheckUtils]: 3: Hoare triple {68#true} ~N~0 := 0; {68#true} is VALID [2020-07-10 20:21:05,612 INFO L280 TraceCheckUtils]: 4: Hoare triple {68#true} assume true; {68#true} is VALID [2020-07-10 20:21:05,612 INFO L275 TraceCheckUtils]: 5: Hoare quadruple {68#true} {68#true} #120#return; {68#true} is VALID [2020-07-10 20:21:05,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 20:21:05,627 INFO L280 TraceCheckUtils]: 0: Hoare triple {68#true} ~cond := #in~cond; {68#true} is VALID [2020-07-10 20:21:05,628 INFO L280 TraceCheckUtils]: 1: Hoare triple {68#true} assume !(0 == ~cond); {68#true} is VALID [2020-07-10 20:21:05,628 INFO L280 TraceCheckUtils]: 2: Hoare triple {68#true} assume true; {68#true} is VALID [2020-07-10 20:21:05,630 INFO L275 TraceCheckUtils]: 3: Hoare quadruple {68#true} {76#(<= 1 ~N~0)} #116#return; {76#(<= 1 ~N~0)} is VALID [2020-07-10 20:21:05,632 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 [2020-07-10 20:21:05,633 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 [2020-07-10 20:21:05,634 INFO L280 TraceCheckUtils]: 2: Hoare triple {68#true} #valid := #valid[0 := 0]; {68#true} is VALID [2020-07-10 20:21:05,634 INFO L280 TraceCheckUtils]: 3: Hoare triple {68#true} assume 0 < #StackHeapBarrier; {68#true} is VALID [2020-07-10 20:21:05,634 INFO L280 TraceCheckUtils]: 4: Hoare triple {68#true} ~N~0 := 0; {68#true} is VALID [2020-07-10 20:21:05,635 INFO L280 TraceCheckUtils]: 5: Hoare triple {68#true} assume true; {68#true} is VALID [2020-07-10 20:21:05,635 INFO L275 TraceCheckUtils]: 6: Hoare quadruple {68#true} {68#true} #120#return; {68#true} is VALID [2020-07-10 20:21:05,636 INFO L263 TraceCheckUtils]: 7: Hoare triple {68#true} call #t~ret10 := main(); {68#true} is VALID [2020-07-10 20:21:05,636 INFO L280 TraceCheckUtils]: 8: Hoare triple {68#true} assume -2147483648 <= #t~nondet0 && #t~nondet0 <= 2147483647; {68#true} is VALID [2020-07-10 20:21:05,637 INFO L280 TraceCheckUtils]: 9: Hoare triple {68#true} ~N~0 := #t~nondet0; {68#true} is VALID [2020-07-10 20:21:05,637 INFO L280 TraceCheckUtils]: 10: Hoare triple {68#true} havoc #t~nondet0; {68#true} is VALID [2020-07-10 20:21:05,639 INFO L280 TraceCheckUtils]: 11: Hoare triple {68#true} assume !(~N~0 <= 0); {76#(<= 1 ~N~0)} is VALID [2020-07-10 20:21:05,640 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 [2020-07-10 20:21:05,640 INFO L280 TraceCheckUtils]: 13: Hoare triple {68#true} ~cond := #in~cond; {68#true} is VALID [2020-07-10 20:21:05,641 INFO L280 TraceCheckUtils]: 14: Hoare triple {68#true} assume !(0 == ~cond); {68#true} is VALID [2020-07-10 20:21:05,641 INFO L280 TraceCheckUtils]: 15: Hoare triple {68#true} assume true; {68#true} is VALID [2020-07-10 20:21:05,643 INFO L275 TraceCheckUtils]: 16: Hoare quadruple {68#true} {76#(<= 1 ~N~0)} #116#return; {76#(<= 1 ~N~0)} is VALID [2020-07-10 20:21:05,644 INFO L280 TraceCheckUtils]: 17: Hoare triple {76#(<= 1 ~N~0)} havoc ~i~0; {76#(<= 1 ~N~0)} is VALID [2020-07-10 20:21:05,645 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 [2020-07-10 20:21:05,646 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 [2020-07-10 20:21:05,647 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 [2020-07-10 20:21:05,648 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 [2020-07-10 20:21:05,650 INFO L280 TraceCheckUtils]: 22: Hoare triple {76#(<= 1 ~N~0)} ~i~0 := 0; {81#(and (= 0 main_~i~0) (<= 1 ~N~0))} is VALID [2020-07-10 20:21:05,651 INFO L280 TraceCheckUtils]: 23: Hoare triple {81#(and (= 0 main_~i~0) (<= 1 ~N~0))} assume !(~i~0 < ~N~0); {69#false} is VALID [2020-07-10 20:21:05,651 INFO L280 TraceCheckUtils]: 24: Hoare triple {69#false} ~i~0 := 0; {69#false} is VALID [2020-07-10 20:21:05,652 INFO L280 TraceCheckUtils]: 25: Hoare triple {69#false} assume !(~i~0 < ~N~0); {69#false} is VALID [2020-07-10 20:21:05,652 INFO L280 TraceCheckUtils]: 26: Hoare triple {69#false} ~i~0 := 0; {69#false} is VALID [2020-07-10 20:21:05,653 INFO L280 TraceCheckUtils]: 27: Hoare triple {69#false} assume !!(~i~0 < ~N~0); {69#false} is VALID [2020-07-10 20:21:05,653 INFO L280 TraceCheckUtils]: 28: Hoare triple {69#false} SUMMARY for call #t~mem9 := read~int(~b~0.base, ~b~0.offset + 8 * ~i~0, 8); srcloc: L49 {69#false} is VALID [2020-07-10 20:21:05,654 INFO L263 TraceCheckUtils]: 29: Hoare triple {69#false} call __VERIFIER_assert((if #t~mem9 == 2 * ~i~0 * ~i~0 + 2 * ~i~0 then 1 else 0)); {69#false} is VALID [2020-07-10 20:21:05,654 INFO L280 TraceCheckUtils]: 30: Hoare triple {69#false} ~cond := #in~cond; {69#false} is VALID [2020-07-10 20:21:05,655 INFO L280 TraceCheckUtils]: 31: Hoare triple {69#false} assume 0 == ~cond; {69#false} is VALID [2020-07-10 20:21:05,655 INFO L280 TraceCheckUtils]: 32: Hoare triple {69#false} assume !false; {69#false} is VALID [2020-07-10 20:21:05,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-10 20:21:05,663 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-10 20:21:05,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867247995] [2020-07-10 20:21:05,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-10 20:21:05,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-10 20:21:05,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775445036] [2020-07-10 20:21:05,677 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-07-10 20:21:05,680 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-10 20:21:05,684 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 5 states. [2020-07-10 20:21:05,748 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 33 edges. 33 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-10 20:21:05,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-10 20:21:05,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-10 20:21:05,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-10 20:21:05,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-10 20:21:05,764 INFO L87 Difference]: Start difference. First operand 65 states. Second operand 5 states. [2020-07-10 20:21:06,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 20:21:06,539 INFO L93 Difference]: Finished difference Result 131 states and 159 transitions. [2020-07-10 20:21:06,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-10 20:21:06,539 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-07-10 20:21:06,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-10 20:21:06,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-07-10 20:21:06,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2020-07-10 20:21:06,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-07-10 20:21:06,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2020-07-10 20:21:06,565 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 6 states and 159 transitions. [2020-07-10 20:21:06,814 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 159 edges. 159 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-10 20:21:06,856 INFO L225 Difference]: With dead ends: 131 [2020-07-10 20:21:06,857 INFO L226 Difference]: Without dead ends: 72 [2020-07-10 20:21:06,866 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 [2020-07-10 20:21:06,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-10 20:21:07,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 62. [2020-07-10 20:21:07,083 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-10 20:21:07,084 INFO L82 GeneralOperation]: Start isEquivalent. First operand 72 states. Second operand 62 states. [2020-07-10 20:21:07,085 INFO L74 IsIncluded]: Start isIncluded. First operand 72 states. Second operand 62 states. [2020-07-10 20:21:07,085 INFO L87 Difference]: Start difference. First operand 72 states. Second operand 62 states. [2020-07-10 20:21:07,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 20:21:07,093 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2020-07-10 20:21:07,094 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2020-07-10 20:21:07,095 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-10 20:21:07,095 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-10 20:21:07,095 INFO L74 IsIncluded]: Start isIncluded. First operand 62 states. Second operand 72 states. [2020-07-10 20:21:07,096 INFO L87 Difference]: Start difference. First operand 62 states. Second operand 72 states. [2020-07-10 20:21:07,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 20:21:07,103 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2020-07-10 20:21:07,103 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2020-07-10 20:21:07,104 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-10 20:21:07,104 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-10 20:21:07,104 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-10 20:21:07,105 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-10 20:21:07,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-07-10 20:21:07,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-07-10 20:21:07,111 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 33 [2020-07-10 20:21:07,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-10 20:21:07,112 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-07-10 20:21:07,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-10 20:21:07,112 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 62 states and 66 transitions. [2020-07-10 20:21:07,212 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 66 edges. 66 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-10 20:21:07,213 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-07-10 20:21:07,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-10 20:21:07,215 INFO L414 BasicCegarLoop]: Found error trace [2020-07-10 20:21:07,215 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] [2020-07-10 20:21:07,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-10 20:21:07,216 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-10 20:21:07,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-10 20:21:07,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1596799413, now seen corresponding path program 1 times [2020-07-10 20:21:07,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-10 20:21:07,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357060533] [2020-07-10 20:21:07,217 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-10 20:21:07,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-10 20:21:07,258 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) [2020-07-10 20:21:07,265 INFO L168 Benchmark]: Toolchain (without parser) took 3303.80 ms. Allocated memory was 138.9 MB in the beginning and 244.3 MB in the end (delta: 105.4 MB). Free memory was 103.7 MB in the beginning and 194.7 MB in the end (delta: -91.0 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2020-07-10 20:21:07,266 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 138.9 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-10 20:21:07,267 INFO L168 Benchmark]: CACSL2BoogieTranslator took 387.04 ms. Allocated memory is still 138.9 MB. Free memory was 103.5 MB in the beginning and 92.4 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. [2020-07-10 20:21:07,269 INFO L168 Benchmark]: Boogie Preprocessor took 208.39 ms. Allocated memory was 138.9 MB in the beginning and 205.0 MB in the end (delta: 66.1 MB). Free memory was 92.4 MB in the beginning and 182.5 MB in the end (delta: -90.1 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-10 20:21:07,270 INFO L168 Benchmark]: RCFGBuilder took 629.09 ms. Allocated memory is still 205.0 MB. Free memory was 182.5 MB in the beginning and 152.9 MB in the end (delta: 29.6 MB). Peak memory consumption was 29.6 MB. Max. memory is 7.1 GB. [2020-07-10 20:21:07,270 INFO L168 Benchmark]: TraceAbstraction took 2071.35 ms. Allocated memory was 205.0 MB in the beginning and 244.3 MB in the end (delta: 39.3 MB). Free memory was 152.2 MB in the beginning and 196.4 MB in the end (delta: -44.2 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-10 20:21:07,275 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 0.27 ms. Allocated memory is still 138.9 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 387.04 ms. Allocated memory is still 138.9 MB. Free memory was 103.5 MB in the beginning and 92.4 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 208.39 ms. Allocated memory was 138.9 MB in the beginning and 205.0 MB in the end (delta: 66.1 MB). Free memory was 92.4 MB in the beginning and 182.5 MB in the end (delta: -90.1 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 629.09 ms. Allocated memory is still 205.0 MB. Free memory was 182.5 MB in the beginning and 152.9 MB in the end (delta: 29.6 MB). Peak memory consumption was 29.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2071.35 ms. Allocated memory was 205.0 MB in the beginning and 244.3 MB in the end (delta: 39.3 MB). Free memory was 152.2 MB in the beginning and 196.4 MB in the end (delta: -44.2 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:442) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...