/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/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/loops/heavy-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 02:20:46,531 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 02:20:46,536 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 02:20:46,597 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 02:20:46,632 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 02:20:46,637 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 02:20:46,639 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 02:20:46,641 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 02:20:46,642 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 02:20:46,646 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 02:20:46,648 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 02:20:46,652 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 02:20:46,656 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 02:20:46,662 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 02:20:46,664 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 02:20:46,665 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 02:20:46,674 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-22 02:20:46,688 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 02:20:46,689 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 02:20:46,689 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 02:20:46,690 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-22 02:20:46,717 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 02:20:46,717 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 02:20:46,722 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 02:20:46,722 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 02:20:46,722 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 02:20:46,722 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 02:20:46,723 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 02:20:46,723 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 02:20:46,723 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 02:20:46,723 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 02:20:46,724 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 02:20:46,725 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 02:20:46,725 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 02:20:46,725 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 02:20:46,726 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 02:20:46,726 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 02:20:46,726 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 02:20:46,726 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 02:20:46,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 02:20:46,727 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 02:20:46,727 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 02:20:46,727 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 02:20:46,727 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 02:20:46,727 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 02:20:47,067 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 02:20:47,090 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 02:20:47,093 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 02:20:47,095 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 02:20:47,095 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 02:20:47,096 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/heavy-2.c [2021-02-22 02:20:47,170 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60a0b0ae7/0f09c618ca774b3a9b4e2526860a3eb9/FLAG3a3139da6 [2021-02-22 02:20:47,838 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 02:20:47,839 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/heavy-2.c [2021-02-22 02:20:47,846 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60a0b0ae7/0f09c618ca774b3a9b4e2526860a3eb9/FLAG3a3139da6 [2021-02-22 02:20:48,213 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60a0b0ae7/0f09c618ca774b3a9b4e2526860a3eb9 [2021-02-22 02:20:48,218 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 02:20:48,233 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 02:20:48,237 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 02:20:48,237 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 02:20:48,241 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 02:20:48,242 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:20:48" (1/1) ... [2021-02-22 02:20:48,243 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@202e6658 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:48, skipping insertion in model container [2021-02-22 02:20:48,243 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:20:48" (1/1) ... [2021-02-22 02:20:48,252 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 02:20:48,266 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 02:20:48,424 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/heavy-2.c[600,613] [2021-02-22 02:20:48,429 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:20:48,487 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 02:20:48,517 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/heavy-2.c[600,613] [2021-02-22 02:20:48,522 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:20:48,622 INFO L208 MainTranslator]: Completed translation [2021-02-22 02:20:48,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:48 WrapperNode [2021-02-22 02:20:48,623 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 02:20:48,624 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 02:20:48,624 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 02:20:48,625 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 02:20:48,635 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:48" (1/1) ... [2021-02-22 02:20:48,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:48" (1/1) ... [2021-02-22 02:20:48,642 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:48" (1/1) ... [2021-02-22 02:20:48,643 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:48" (1/1) ... [2021-02-22 02:20:48,651 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:48" (1/1) ... [2021-02-22 02:20:48,656 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:48" (1/1) ... [2021-02-22 02:20:48,658 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:48" (1/1) ... [2021-02-22 02:20:48,660 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 02:20:48,661 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 02:20:48,661 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 02:20:48,661 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 02:20:48,662 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:48" (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 [2021-02-22 02:20:48,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 02:20:48,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 02:20:48,762 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 02:20:48,762 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 02:20:48,762 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 02:20:48,763 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 02:20:48,763 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 02:20:48,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 02:20:48,763 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 02:20:48,763 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 02:20:48,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 02:20:48,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 02:20:48,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 02:20:48,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-02-22 02:20:48,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 02:20:48,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 02:20:49,155 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 02:20:49,156 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-02-22 02:20:49,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:20:49 BoogieIcfgContainer [2021-02-22 02:20:49,162 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 02:20:49,166 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 02:20:49,166 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 02:20:49,170 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 02:20:49,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 02:20:48" (1/3) ... [2021-02-22 02:20:49,171 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c91b586 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:20:49, skipping insertion in model container [2021-02-22 02:20:49,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:48" (2/3) ... [2021-02-22 02:20:49,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c91b586 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:20:49, skipping insertion in model container [2021-02-22 02:20:49,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:20:49" (3/3) ... [2021-02-22 02:20:49,176 INFO L111 eAbstractionObserver]: Analyzing ICFG heavy-2.c [2021-02-22 02:20:49,183 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 02:20:49,188 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 02:20:49,209 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 02:20:49,246 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 02:20:49,246 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 02:20:49,246 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 02:20:49,246 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 02:20:49,246 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 02:20:49,246 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 02:20:49,247 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 02:20:49,247 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 02:20:49,274 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states. [2021-02-22 02:20:49,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-22 02:20:49,291 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:20:49,292 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] [2021-02-22 02:20:49,292 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:20:49,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:20:49,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1876603401, now seen corresponding path program 1 times [2021-02-22 02:20:49,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:20:49,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126882836] [2021-02-22 02:20:49,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:20:49,404 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:20:49,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:49,634 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:49,636 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:49,638 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:49,639 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:49,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:20:49,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:49,750 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:49,751 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:49,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:20:49,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126882836] [2021-02-22 02:20:49,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:20:49,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-22 02:20:49,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322188125] [2021-02-22 02:20:49,767 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-22 02:20:49,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:20:49,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-22 02:20:49,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-22 02:20:49,784 INFO L87 Difference]: Start difference. First operand 53 states. Second operand 3 states. [2021-02-22 02:20:49,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:20:49,943 INFO L93 Difference]: Finished difference Result 104 states and 123 transitions. [2021-02-22 02:20:49,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-22 02:20:49,945 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2021-02-22 02:20:49,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:20:49,955 INFO L225 Difference]: With dead ends: 104 [2021-02-22 02:20:49,956 INFO L226 Difference]: Without dead ends: 61 [2021-02-22 02:20:49,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-22 02:20:49,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-02-22 02:20:50,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 44. [2021-02-22 02:20:50,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-02-22 02:20:50,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-02-22 02:20:50,008 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 25 [2021-02-22 02:20:50,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:20:50,009 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-02-22 02:20:50,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-22 02:20:50,009 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-02-22 02:20:50,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-22 02:20:50,010 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:20:50,010 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] [2021-02-22 02:20:50,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 02:20:50,011 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:20:50,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:20:50,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1876644724, now seen corresponding path program 1 times [2021-02-22 02:20:50,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:20:50,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848712599] [2021-02-22 02:20:50,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:20:50,015 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:20:50,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:50,081 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:50,081 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:50,082 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:50,083 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:20:50,100 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:50,101 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:50,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:20:50,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:50,150 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:50,151 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:50,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:20:50,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848712599] [2021-02-22 02:20:50,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:20:50,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-22 02:20:50,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406075944] [2021-02-22 02:20:50,156 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-22 02:20:50,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:20:50,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-22 02:20:50,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-22 02:20:50,158 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 4 states. [2021-02-22 02:20:50,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:20:50,350 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2021-02-22 02:20:50,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-22 02:20:50,351 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2021-02-22 02:20:50,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:20:50,353 INFO L225 Difference]: With dead ends: 93 [2021-02-22 02:20:50,353 INFO L226 Difference]: Without dead ends: 90 [2021-02-22 02:20:50,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-22 02:20:50,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-02-22 02:20:50,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 45. [2021-02-22 02:20:50,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-02-22 02:20:50,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-02-22 02:20:50,374 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 25 [2021-02-22 02:20:50,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:20:50,375 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-02-22 02:20:50,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-22 02:20:50,375 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-02-22 02:20:50,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-22 02:20:50,377 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:20:50,377 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] [2021-02-22 02:20:50,378 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 02:20:50,378 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:20:50,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:20:50,380 INFO L82 PathProgramCache]: Analyzing trace with hash 823473260, now seen corresponding path program 1 times [2021-02-22 02:20:50,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:20:50,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627315246] [2021-02-22 02:20:50,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:20:50,404 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.loopaccelerator.AcceleratorWernerOverapprox.accelerateLoop(AcceleratorWernerOverapprox.java:55) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolationCore.acceleratedInterpolationCoreIsCorrect(AcceleratedInterpolationCore.java:183) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:145) 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:437) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:62) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateAllErrorsAtOnce(TraceAbstractionStarter.java:317) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:131) 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) [2021-02-22 02:20:50,421 INFO L168 Benchmark]: Toolchain (without parser) took 2196.66 ms. Allocated memory was 162.5 MB in the beginning and 197.1 MB in the end (delta: 34.6 MB). Free memory was 139.5 MB in the beginning and 142.9 MB in the end (delta: -3.5 MB). Peak memory consumption was 31.8 MB. Max. memory is 8.0 GB. [2021-02-22 02:20:50,422 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 162.5 MB. Free memory is still 134.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 02:20:50,426 INFO L168 Benchmark]: CACSL2BoogieTranslator took 387.14 ms. Allocated memory is still 162.5 MB. Free memory was 138.4 MB in the beginning and 132.6 MB in the end (delta: 5.7 MB). Peak memory consumption was 32.1 MB. Max. memory is 8.0 GB. [2021-02-22 02:20:50,428 INFO L168 Benchmark]: Boogie Preprocessor took 35.72 ms. Allocated memory is still 162.5 MB. Free memory was 132.6 MB in the beginning and 131.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-22 02:20:50,431 INFO L168 Benchmark]: RCFGBuilder took 500.96 ms. Allocated memory is still 162.5 MB. Free memory was 131.1 MB in the beginning and 113.2 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-02-22 02:20:50,435 INFO L168 Benchmark]: TraceAbstraction took 1249.86 ms. Allocated memory was 162.5 MB in the beginning and 197.1 MB in the end (delta: 34.6 MB). Free memory was 112.7 MB in the beginning and 142.9 MB in the end (delta: -30.2 MB). Peak memory consumption was 4.9 MB. Max. memory is 8.0 GB. [2021-02-22 02:20:50,443 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 162.5 MB. Free memory is still 134.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 387.14 ms. Allocated memory is still 162.5 MB. Free memory was 138.4 MB in the beginning and 132.6 MB in the end (delta: 5.7 MB). Peak memory consumption was 32.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.72 ms. Allocated memory is still 162.5 MB. Free memory was 132.6 MB in the beginning and 131.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 500.96 ms. Allocated memory is still 162.5 MB. Free memory was 131.1 MB in the beginning and 113.2 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1249.86 ms. Allocated memory was 162.5 MB in the beginning and 197.1 MB in the end (delta: 34.6 MB). Free memory was 112.7 MB in the beginning and 142.9 MB in the end (delta: -30.2 MB). Peak memory consumption was 4.9 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.loopaccelerator.AcceleratorWernerOverapprox.accelerateLoop(AcceleratorWernerOverapprox.java:55) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...