/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/n.c11.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 02:20:52,673 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 02:20:52,676 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 02:20:52,709 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 02:20:52,722 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 02:20:52,724 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 02:20:52,725 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 02:20:52,727 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 02:20:52,728 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 02:20:52,729 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 02:20:52,732 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 02:20:52,734 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 02:20:52,736 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 02:20:52,738 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 02:20:52,740 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 02:20:52,741 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 02:20:52,744 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-22 02:20:52,756 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 02:20:52,757 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 02:20:52,758 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 02:20:52,759 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 02:20:52,771 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 02:20:52,772 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 02:20:52,773 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 02:20:52,774 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 02:20:52,774 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 02:20:52,774 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 02:20:52,774 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 02:20:52,775 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 02:20:52,775 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 02:20:52,775 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 02:20:52,775 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 02:20:52,776 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 02:20:52,776 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 02:20:52,776 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 02:20:52,776 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 02:20:52,776 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 02:20:52,777 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 02:20:52,777 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 02:20:52,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 02:20:52,777 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 02:20:52,778 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 02:20:52,778 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 02:20:52,778 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 02:20:52,778 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 02:20:53,189 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 02:20:53,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 02:20:53,234 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 02:20:53,236 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 02:20:53,237 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 02:20:53,238 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/n.c11.c [2021-02-22 02:20:53,330 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/acdc33120/f6451d2938b646bd88cdcf19c02793ff/FLAG2935dae57 [2021-02-22 02:20:53,997 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 02:20:53,997 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c11.c [2021-02-22 02:20:54,005 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/acdc33120/f6451d2938b646bd88cdcf19c02793ff/FLAG2935dae57 [2021-02-22 02:20:54,362 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/acdc33120/f6451d2938b646bd88cdcf19c02793ff [2021-02-22 02:20:54,365 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 02:20:54,378 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 02:20:54,381 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 02:20:54,381 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 02:20:54,386 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 02:20:54,387 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:20:54" (1/1) ... [2021-02-22 02:20:54,388 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@741e2e61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:54, skipping insertion in model container [2021-02-22 02:20:54,389 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:20:54" (1/1) ... [2021-02-22 02:20:54,398 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 02:20:54,419 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 02:20:54,567 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/n.c11.c[317,330] [2021-02-22 02:20:54,587 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:20:54,603 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 02:20:54,623 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/n.c11.c[317,330] [2021-02-22 02:20:54,627 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:20:54,646 INFO L208 MainTranslator]: Completed translation [2021-02-22 02:20:54,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:54 WrapperNode [2021-02-22 02:20:54,647 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 02:20:54,648 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 02:20:54,648 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 02:20:54,649 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 02:20:54,664 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:54" (1/1) ... [2021-02-22 02:20:54,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:54" (1/1) ... [2021-02-22 02:20:54,673 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:54" (1/1) ... [2021-02-22 02:20:54,673 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:54" (1/1) ... [2021-02-22 02:20:54,680 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:54" (1/1) ... [2021-02-22 02:20:54,685 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:54" (1/1) ... [2021-02-22 02:20:54,686 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:54" (1/1) ... [2021-02-22 02:20:54,689 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 02:20:54,690 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 02:20:54,690 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 02:20:54,690 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 02:20:54,691 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:54" (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 02:20:54,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 02:20:54,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 02:20:54,831 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 02:20:54,831 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-22 02:20:54,831 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 02:20:54,832 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 02:20:54,832 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 02:20:54,833 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 02:20:54,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 02:20:54,834 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-22 02:20:54,834 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-02-22 02:20:54,834 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 02:20:54,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 02:20:54,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 02:20:54,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 02:20:54,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 02:20:54,836 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 02:20:54,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 02:20:55,246 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 02:20:55,247 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-22 02:20:55,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:20:55 BoogieIcfgContainer [2021-02-22 02:20:55,252 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 02:20:55,257 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 02:20:55,258 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 02:20:55,267 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 02:20:55,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 02:20:54" (1/3) ... [2021-02-22 02:20:55,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b28de63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:20:55, skipping insertion in model container [2021-02-22 02:20:55,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:54" (2/3) ... [2021-02-22 02:20:55,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b28de63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:20:55, skipping insertion in model container [2021-02-22 02:20:55,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:20:55" (3/3) ... [2021-02-22 02:20:55,274 INFO L111 eAbstractionObserver]: Analyzing ICFG n.c11.c [2021-02-22 02:20:55,291 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 02:20:55,303 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 02:20:55,352 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 02:20:55,383 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 02:20:55,383 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 02:20:55,383 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 02:20:55,383 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 02:20:55,384 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 02:20:55,384 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 02:20:55,384 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 02:20:55,384 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 02:20:55,403 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2021-02-22 02:20:55,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-22 02:20:55,413 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:20:55,415 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] [2021-02-22 02:20:55,415 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:20:55,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:20:55,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1083844101, now seen corresponding path program 1 times [2021-02-22 02:20:55,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:20:55,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125017265] [2021-02-22 02:20:55,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:20:55,561 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:20:55,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:55,677 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:55,679 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:55,681 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:55,682 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:55,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:20:55,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:55,778 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:55,780 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:55,786 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 02:20:55,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125017265] [2021-02-22 02:20:55,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:20:55,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-22 02:20:55,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302641582] [2021-02-22 02:20:55,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-22 02:20:55,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:20:55,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-22 02:20:55,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-22 02:20:55,818 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2021-02-22 02:20:55,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:20:55,933 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2021-02-22 02:20:55,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-22 02:20:55,936 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2021-02-22 02:20:55,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:20:55,945 INFO L225 Difference]: With dead ends: 49 [2021-02-22 02:20:55,945 INFO L226 Difference]: Without dead ends: 29 [2021-02-22 02:20:55,949 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 02:20:55,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-02-22 02:20:56,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-02-22 02:20:56,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-02-22 02:20:56,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-02-22 02:20:56,006 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 20 [2021-02-22 02:20:56,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:20:56,007 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-02-22 02:20:56,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-22 02:20:56,008 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-02-22 02:20:56,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-22 02:20:56,009 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:20:56,009 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] [2021-02-22 02:20:56,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 02:20:56,009 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:20:56,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:20:56,011 INFO L82 PathProgramCache]: Analyzing trace with hash 232671822, now seen corresponding path program 1 times [2021-02-22 02:20:56,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:20:56,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997769289] [2021-02-22 02:20:56,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:20:56,015 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:20:56,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:56,101 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:56,102 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:56,105 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:56,107 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:20:56,115 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:56,116 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:20:56,128 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:56,130 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:20:56,145 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:56,147 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:56,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:20:56,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:56,236 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:56,238 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:56,243 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 02:20:56,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1997769289] [2021-02-22 02:20:56,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:20:56,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-22 02:20:56,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060339254] [2021-02-22 02:20:56,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-22 02:20:56,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:20:56,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-22 02:20:56,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-22 02:20:56,247 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 6 states. [2021-02-22 02:20:56,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:20:56,686 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2021-02-22 02:20:56,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-22 02:20:56,687 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2021-02-22 02:20:56,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:20:56,689 INFO L225 Difference]: With dead ends: 53 [2021-02-22 02:20:56,689 INFO L226 Difference]: Without dead ends: 35 [2021-02-22 02:20:56,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-02-22 02:20:56,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-02-22 02:20:56,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-02-22 02:20:56,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-02-22 02:20:56,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-02-22 02:20:56,723 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 21 [2021-02-22 02:20:56,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:20:56,724 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-02-22 02:20:56,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-22 02:20:56,725 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-02-22 02:20:56,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-22 02:20:56,731 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:20:56,732 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] [2021-02-22 02:20:56,733 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 02:20:56,733 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:20:56,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:20:56,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1436452214, now seen corresponding path program 1 times [2021-02-22 02:20:56,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:20:56,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254195442] [2021-02-22 02:20:56,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:20:57,294 WARN L202 SmtUtils]: Spent 516.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-02-22 02:20:57,302 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 02:20:57,311 INFO L168 Benchmark]: Toolchain (without parser) took 2942.89 ms. Allocated memory is still 159.4 MB. Free memory was 136.2 MB in the beginning and 115.4 MB in the end (delta: 20.8 MB). Peak memory consumption was 86.6 MB. Max. memory is 8.0 GB. [2021-02-22 02:20:57,312 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 159.4 MB. Free memory is still 142.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 02:20:57,313 INFO L168 Benchmark]: CACSL2BoogieTranslator took 266.22 ms. Allocated memory is still 159.4 MB. Free memory was 135.1 MB in the beginning and 125.2 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-22 02:20:57,314 INFO L168 Benchmark]: Boogie Preprocessor took 40.76 ms. Allocated memory is still 159.4 MB. Free memory was 125.2 MB in the beginning and 123.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-22 02:20:57,318 INFO L168 Benchmark]: RCFGBuilder took 562.63 ms. Allocated memory is still 159.4 MB. Free memory was 123.7 MB in the beginning and 109.9 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-02-22 02:20:57,319 INFO L168 Benchmark]: TraceAbstraction took 2051.71 ms. Allocated memory is still 159.4 MB. Free memory was 109.5 MB in the beginning and 115.4 MB in the end (delta: -5.9 MB). Peak memory consumption was 59.3 MB. Max. memory is 8.0 GB. [2021-02-22 02:20:57,326 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 159.4 MB. Free memory is still 142.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 266.22 ms. Allocated memory is still 159.4 MB. Free memory was 135.1 MB in the beginning and 125.2 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.76 ms. Allocated memory is still 159.4 MB. Free memory was 125.2 MB in the beginning and 123.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 562.63 ms. Allocated memory is still 159.4 MB. Free memory was 123.7 MB in the beginning and 109.9 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2051.71 ms. Allocated memory is still 159.4 MB. Free memory was 109.5 MB in the beginning and 115.4 MB in the end (delta: -5.9 MB). Peak memory consumption was 59.3 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.loopaccelerator.AcceleratorWernerOverapprox.accelerateLoop(AcceleratorWernerOverapprox.java:55) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...