/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive/Ackermann01-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 20:25:57,658 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 20:25:57,661 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 20:25:57,699 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 20:25:57,699 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 20:25:57,701 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 20:25:57,703 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 20:25:57,705 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 20:25:57,707 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 20:25:57,709 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 20:25:57,710 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 20:25:57,712 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 20:25:57,712 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 20:25:57,713 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 20:25:57,715 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 20:25:57,716 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 20:25:57,717 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 20:25:57,718 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 20:25:57,732 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 20:25:57,739 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 20:25:57,745 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 20:25:57,747 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 20:25:57,749 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 20:25:57,751 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 20:25:57,761 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 20:25:57,783 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 20:25:57,784 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 20:25:57,785 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 20:25:57,786 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 20:25:57,810 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 20:25:57,810 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 20:25:57,815 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 20:25:57,815 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 20:25:57,815 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 20:25:57,816 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 20:25:57,816 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 20:25:57,816 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 20:25:57,816 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 20:25:57,817 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 20:25:57,818 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 20:25:57,818 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 20:25:57,818 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 20:25:57,818 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 20:25:57,819 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 20:25:57,819 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 20:25:57,819 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 20:25:57,820 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 20:25:57,820 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 20:25:57,820 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 20:25:57,820 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 20:25:57,821 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 20:25:57,821 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 20:25:58,207 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 20:25:58,260 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 20:25:58,266 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 20:25:58,267 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 20:25:58,268 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 20:25:58,269 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann01-2.c [2020-10-23 20:25:58,362 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4a5501c2/366446f27d1d403a8986b7c1d78d2211/FLAG8d42eea2f [2020-10-23 20:25:58,919 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 20:25:58,920 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann01-2.c [2020-10-23 20:25:58,928 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4a5501c2/366446f27d1d403a8986b7c1d78d2211/FLAG8d42eea2f [2020-10-23 20:25:59,283 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4a5501c2/366446f27d1d403a8986b7c1d78d2211 [2020-10-23 20:25:59,287 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 20:25:59,325 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 20:25:59,332 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 20:25:59,332 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 20:25:59,340 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 20:25:59,341 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:25:59" (1/1) ... [2020-10-23 20:25:59,345 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46922da8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:59, skipping insertion in model container [2020-10-23 20:25:59,346 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:25:59" (1/1) ... [2020-10-23 20:25:59,355 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 20:25:59,377 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 20:25:59,618 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:25:59,628 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 20:25:59,653 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:25:59,680 INFO L208 MainTranslator]: Completed translation [2020-10-23 20:25:59,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:59 WrapperNode [2020-10-23 20:25:59,681 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 20:25:59,684 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 20:25:59,684 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 20:25:59,684 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 20:25:59,698 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:59" (1/1) ... [2020-10-23 20:25:59,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:59" (1/1) ... [2020-10-23 20:25:59,707 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:59" (1/1) ... [2020-10-23 20:25:59,708 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:59" (1/1) ... [2020-10-23 20:25:59,719 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:59" (1/1) ... [2020-10-23 20:25:59,721 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:59" (1/1) ... [2020-10-23 20:25:59,724 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:59" (1/1) ... [2020-10-23 20:25:59,733 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 20:25:59,734 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 20:25:59,734 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 20:25:59,734 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 20:25:59,735 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:59" (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 [2020-10-23 20:25:59,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 20:25:59,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 20:25:59,851 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 20:25:59,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2020-10-23 20:25:59,852 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 20:25:59,852 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 20:25:59,852 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 20:25:59,852 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 20:25:59,852 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 20:25:59,853 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 20:25:59,853 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2020-10-23 20:25:59,853 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 20:25:59,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 20:25:59,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 20:25:59,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 20:25:59,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 20:25:59,854 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 20:25:59,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 20:26:00,127 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 20:26:00,127 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 20:26:00,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:26:00 BoogieIcfgContainer [2020-10-23 20:26:00,129 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 20:26:00,133 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 20:26:00,133 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 20:26:00,137 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 20:26:00,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:25:59" (1/3) ... [2020-10-23 20:26:00,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43ae62ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:26:00, skipping insertion in model container [2020-10-23 20:26:00,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:59" (2/3) ... [2020-10-23 20:26:00,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43ae62ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:26:00, skipping insertion in model container [2020-10-23 20:26:00,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:26:00" (3/3) ... [2020-10-23 20:26:00,142 INFO L111 eAbstractionObserver]: Analyzing ICFG Ackermann01-2.c [2020-10-23 20:26:00,164 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 20:26:00,171 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 20:26:00,191 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 20:26:00,257 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 20:26:00,257 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 20:26:00,257 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 20:26:00,257 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 20:26:00,257 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 20:26:00,258 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 20:26:00,258 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 20:26:00,262 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 20:26:00,281 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-10-23 20:26:00,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-23 20:26:00,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:00,293 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] [2020-10-23 20:26:00,294 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:00,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:00,301 INFO L82 PathProgramCache]: Analyzing trace with hash -946996355, now seen corresponding path program 1 times [2020-10-23 20:26:00,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:00,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409197825] [2020-10-23 20:26:00,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:00,395 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:26:00,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:00,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:26:00,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:00,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-23 20:26:00,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:00,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:26:00,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409197825] [2020-10-23 20:26:00,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:26:00,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 20:26:00,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158221759] [2020-10-23 20:26:00,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 20:26:00,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:26:00,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 20:26:00,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-23 20:26:00,809 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 8 states. [2020-10-23 20:26:01,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:26:01,636 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2020-10-23 20:26:01,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 20:26:01,638 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-23 20:26:01,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:26:01,649 INFO L225 Difference]: With dead ends: 74 [2020-10-23 20:26:01,650 INFO L226 Difference]: Without dead ends: 48 [2020-10-23 20:26:01,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-23 20:26:01,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-23 20:26:01,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-23 20:26:01,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-23 20:26:01,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2020-10-23 20:26:01,731 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 33 [2020-10-23 20:26:01,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:26:01,732 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2020-10-23 20:26:01,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 20:26:01,732 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2020-10-23 20:26:01,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-23 20:26:01,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:01,736 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:26:01,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 20:26:01,737 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:01,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:01,738 INFO L82 PathProgramCache]: Analyzing trace with hash 300807360, now seen corresponding path program 1 times [2020-10-23 20:26:01,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:01,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [161310481] [2020-10-23 20:26:01,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:01,742 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:26:01,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:01,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:26:01,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:01,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-23 20:26:01,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:01,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-23 20:26:01,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:01,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 20:26:01,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [161310481] [2020-10-23 20:26:01,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:26:01,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-23 20:26:01,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934939189] [2020-10-23 20:26:01,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 20:26:01,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:26:01,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 20:26:01,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-23 20:26:01,987 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 9 states. [2020-10-23 20:26:02,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:26:02,587 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-10-23 20:26:02,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 20:26:02,588 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2020-10-23 20:26:02,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:26:02,591 INFO L225 Difference]: With dead ends: 60 [2020-10-23 20:26:02,591 INFO L226 Difference]: Without dead ends: 53 [2020-10-23 20:26:02,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-23 20:26:02,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-23 20:26:02,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2020-10-23 20:26:02,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-23 20:26:02,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2020-10-23 20:26:02,612 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 43 [2020-10-23 20:26:02,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:26:02,612 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2020-10-23 20:26:02,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 20:26:02,613 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2020-10-23 20:26:02,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-23 20:26:02,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:02,616 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:26:02,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 20:26:02,616 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:02,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:02,617 INFO L82 PathProgramCache]: Analyzing trace with hash 855044706, now seen corresponding path program 1 times [2020-10-23 20:26:02,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:02,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493397091] [2020-10-23 20:26:02,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:02,620 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:26:02,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:02,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:26:02,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:02,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-23 20:26:02,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:02,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-23 20:26:02,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:02,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-23 20:26:02,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:02,807 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-23 20:26:02,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493397091] [2020-10-23 20:26:02,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:26:02,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 20:26:02,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408720506] [2020-10-23 20:26:02,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 20:26:02,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:26:02,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 20:26:02,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 20:26:02,811 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand 6 states. [2020-10-23 20:26:03,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:26:03,063 INFO L93 Difference]: Finished difference Result 83 states and 100 transitions. [2020-10-23 20:26:03,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 20:26:03,064 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-10-23 20:26:03,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:26:03,066 INFO L225 Difference]: With dead ends: 83 [2020-10-23 20:26:03,066 INFO L226 Difference]: Without dead ends: 53 [2020-10-23 20:26:03,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-23 20:26:03,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-23 20:26:03,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-23 20:26:03,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-23 20:26:03,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2020-10-23 20:26:03,085 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 52 [2020-10-23 20:26:03,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:26:03,086 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2020-10-23 20:26:03,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 20:26:03,086 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2020-10-23 20:26:03,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-23 20:26:03,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:03,088 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:26:03,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 20:26:03,089 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:03,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:03,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1772464485, now seen corresponding path program 1 times [2020-10-23 20:26:03,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:03,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [889302485] [2020-10-23 20:26:03,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:03,092 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.looppreprocessor.LoopPreprocessorFastUPR.preProcessLoop(LoopPreprocessorFastUPR.java:119) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:266) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:147) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:241) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) 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:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-10-23 20:26:03,099 INFO L168 Benchmark]: Toolchain (without parser) took 3806.73 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 108.5 MB in the beginning and 79.9 MB in the end (delta: 28.6 MB). Peak memory consumption was 60.0 MB. Max. memory is 8.0 GB. [2020-10-23 20:26:03,100 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 125.2 MB in the end (delta: 109.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 20:26:03,101 INFO L168 Benchmark]: CACSL2BoogieTranslator took 349.41 ms. Allocated memory is still 151.0 MB. Free memory was 134.6 MB in the beginning and 125.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 20:26:03,102 INFO L168 Benchmark]: Boogie Preprocessor took 49.04 ms. Allocated memory is still 151.0 MB. Free memory was 125.4 MB in the beginning and 124.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 20:26:03,103 INFO L168 Benchmark]: RCFGBuilder took 395.71 ms. Allocated memory is still 151.0 MB. Free memory was 124.0 MB in the beginning and 120.1 MB in the end (delta: 3.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2020-10-23 20:26:03,104 INFO L168 Benchmark]: TraceAbstraction took 2962.96 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 119.5 MB in the beginning and 79.9 MB in the end (delta: 39.5 MB). Peak memory consumption was 70.3 MB. Max. memory is 8.0 GB. [2020-10-23 20:26:03,108 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 125.2 MB in the end (delta: 109.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 349.41 ms. Allocated memory is still 151.0 MB. Free memory was 134.6 MB in the beginning and 125.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 49.04 ms. Allocated memory is still 151.0 MB. Free memory was 125.4 MB in the beginning and 124.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 395.71 ms. Allocated memory is still 151.0 MB. Free memory was 124.0 MB in the beginning and 120.1 MB in the end (delta: 3.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2962.96 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 119.5 MB in the beginning and 79.9 MB in the end (delta: 39.5 MB). Peak memory consumption was 70.3 MB. Max. memory is 8.0 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.looppreprocessor.LoopPreprocessorFastUPR.preProcessLoop(LoopPreprocessorFastUPR.java:119) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...