/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/loop-lit/afnp2014.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 02:23:10,776 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 02:23:10,779 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 02:23:10,817 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 02:23:10,837 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 02:23:10,838 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 02:23:10,839 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 02:23:10,841 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 02:23:10,842 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 02:23:10,845 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 02:23:10,847 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 02:23:10,852 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 02:23:10,854 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 02:23:10,856 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 02:23:10,857 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 02:23:10,858 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 02:23:10,861 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-22 02:23:10,872 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 02:23:10,873 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 02:23:10,874 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 02:23:10,875 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 02:23:10,888 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 02:23:10,889 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 02:23:10,890 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 02:23:10,891 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 02:23:10,891 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 02:23:10,891 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 02:23:10,891 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 02:23:10,892 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 02:23:10,892 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 02:23:10,892 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 02:23:10,893 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 02:23:10,893 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 02:23:10,893 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 02:23:10,893 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 02:23:10,894 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 02:23:10,894 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 02:23:10,894 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 02:23:10,894 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 02:23:10,895 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 02:23:10,895 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 02:23:10,895 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 02:23:10,895 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 02:23:10,896 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 02:23:10,896 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 02:23:11,250 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 02:23:11,285 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 02:23:11,288 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 02:23:11,289 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 02:23:11,291 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 02:23:11,292 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/afnp2014.i [2021-02-22 02:23:11,381 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ef798dc8/dbd8bb070bde4b1a86b3e4fc075a6fb9/FLAG015dd201d [2021-02-22 02:23:12,012 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 02:23:12,013 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/afnp2014.i [2021-02-22 02:23:12,019 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ef798dc8/dbd8bb070bde4b1a86b3e4fc075a6fb9/FLAG015dd201d [2021-02-22 02:23:12,409 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ef798dc8/dbd8bb070bde4b1a86b3e4fc075a6fb9 [2021-02-22 02:23:12,412 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 02:23:12,423 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 02:23:12,426 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 02:23:12,426 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 02:23:12,435 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 02:23:12,435 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:23:12" (1/1) ... [2021-02-22 02:23:12,437 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53dfd644 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:12, skipping insertion in model container [2021-02-22 02:23:12,437 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:23:12" (1/1) ... [2021-02-22 02:23:12,446 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 02:23:12,463 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 02:23:12,613 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/afnp2014.i[895,908] [2021-02-22 02:23:12,623 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:23:12,633 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 02:23:12,649 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/afnp2014.i[895,908] [2021-02-22 02:23:12,652 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:23:12,670 INFO L208 MainTranslator]: Completed translation [2021-02-22 02:23:12,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:12 WrapperNode [2021-02-22 02:23:12,670 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 02:23:12,672 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 02:23:12,672 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 02:23:12,672 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 02:23:12,685 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:12" (1/1) ... [2021-02-22 02:23:12,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:12" (1/1) ... [2021-02-22 02:23:12,693 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:12" (1/1) ... [2021-02-22 02:23:12,694 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:12" (1/1) ... [2021-02-22 02:23:12,700 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:12" (1/1) ... [2021-02-22 02:23:12,704 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:12" (1/1) ... [2021-02-22 02:23:12,706 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:12" (1/1) ... [2021-02-22 02:23:12,708 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 02:23:12,709 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 02:23:12,709 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 02:23:12,709 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 02:23:12,710 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:12" (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 02:23:12,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 02:23:12,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 02:23:12,810 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 02:23:12,810 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-22 02:23:12,811 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-22 02:23:12,811 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 02:23:12,811 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 02:23:12,812 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 02:23:12,812 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-22 02:23:12,812 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-22 02:23:12,812 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 02:23:12,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 02:23:12,813 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-22 02:23:12,813 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-22 02:23:12,813 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-22 02:23:12,813 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 02:23:12,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 02:23:12,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 02:23:12,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 02:23:12,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 02:23:12,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 02:23:12,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 02:23:13,182 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 02:23:13,183 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-22 02:23:13,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:23:13 BoogieIcfgContainer [2021-02-22 02:23:13,185 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 02:23:13,187 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 02:23:13,187 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 02:23:13,192 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 02:23:13,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 02:23:12" (1/3) ... [2021-02-22 02:23:13,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3301fbc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:23:13, skipping insertion in model container [2021-02-22 02:23:13,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:12" (2/3) ... [2021-02-22 02:23:13,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3301fbc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:23:13, skipping insertion in model container [2021-02-22 02:23:13,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:23:13" (3/3) ... [2021-02-22 02:23:13,196 INFO L111 eAbstractionObserver]: Analyzing ICFG afnp2014.i [2021-02-22 02:23:13,204 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 02:23:13,208 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 02:23:13,237 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 02:23:13,263 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 02:23:13,263 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 02:23:13,263 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 02:23:13,263 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 02:23:13,263 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 02:23:13,264 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 02:23:13,264 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 02:23:13,264 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 02:23:13,280 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2021-02-22 02:23:13,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-22 02:23:13,317 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:23:13,318 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 02:23:13,319 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:23:13,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:23:13,326 INFO L82 PathProgramCache]: Analyzing trace with hash 613655507, now seen corresponding path program 1 times [2021-02-22 02:23:13,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:23:13,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678467019] [2021-02-22 02:23:13,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:23:13,418 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:23:13,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:23:13,575 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:23:13,587 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:23:13,592 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:23:13,594 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:23:13,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:23:13,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:23:13,728 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:23:13,729 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:23:13,741 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 02:23:13,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1678467019] [2021-02-22 02:23:13,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:23:13,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-22 02:23:13,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523258494] [2021-02-22 02:23:13,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-22 02:23:13,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:23:13,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-22 02:23:13,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-22 02:23:13,776 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2021-02-22 02:23:13,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:23:13,928 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2021-02-22 02:23:13,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-22 02:23:13,932 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2021-02-22 02:23:13,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:23:13,941 INFO L225 Difference]: With dead ends: 49 [2021-02-22 02:23:13,941 INFO L226 Difference]: Without dead ends: 29 [2021-02-22 02:23:13,945 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 02:23:13,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-02-22 02:23:14,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-02-22 02:23:14,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-02-22 02:23:14,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-02-22 02:23:14,013 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 18 [2021-02-22 02:23:14,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:23:14,014 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-02-22 02:23:14,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-22 02:23:14,014 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-02-22 02:23:14,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-22 02:23:14,016 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:23:14,016 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] [2021-02-22 02:23:14,017 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 02:23:14,017 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:23:14,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:23:14,018 INFO L82 PathProgramCache]: Analyzing trace with hash -495401181, now seen corresponding path program 1 times [2021-02-22 02:23:14,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:23:14,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129018771] [2021-02-22 02:23:14,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:23:14,036 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:23:14,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:23:14,184 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:23:14,186 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:23:14,188 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:23:14,189 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-22 02:23:14,213 WARN L141 QuantifierPusher]: treesize reduction 2, result has 84.6 percent of original size [2021-02-22 02:23:14,214 WARN L147 QuantifierPusher]: treesize reduction 2, result has 84.6 percent of original size 11 [2021-02-22 02:23:14,235 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:23:14,237 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:23:14,250 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:23:14,252 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:23:14,268 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:23:14,269 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:23:14,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:23:14,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:23:14,336 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:23:14,337 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:23:14,339 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 02:23:14,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129018771] [2021-02-22 02:23:14,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:23:14,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-22 02:23:14,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751849156] [2021-02-22 02:23:14,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-22 02:23:14,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:23:14,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-22 02:23:14,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-22 02:23:14,343 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 7 states. [2021-02-22 02:23:14,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:23:14,643 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2021-02-22 02:23:14,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-22 02:23:14,644 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2021-02-22 02:23:14,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:23:14,646 INFO L225 Difference]: With dead ends: 45 [2021-02-22 02:23:14,646 INFO L226 Difference]: Without dead ends: 38 [2021-02-22 02:23:14,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-02-22 02:23:14,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-02-22 02:23:14,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2021-02-22 02:23:14,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-02-22 02:23:14,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2021-02-22 02:23:14,661 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 22 [2021-02-22 02:23:14,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:23:14,661 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2021-02-22 02:23:14,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-22 02:23:14,662 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2021-02-22 02:23:14,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-22 02:23:14,663 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:23:14,663 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-02-22 02:23:14,663 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 02:23:14,664 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:23:14,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:23:14,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1815760705, now seen corresponding path program 1 times [2021-02-22 02:23:14,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:23:14,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568019085] [2021-02-22 02:23:14,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:23:14,678 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 02:23:14,682 INFO L168 Benchmark]: Toolchain (without parser) took 2267.64 ms. Allocated memory is still 168.8 MB. Free memory was 145.8 MB in the beginning and 76.1 MB in the end (delta: 69.7 MB). Peak memory consumption was 70.5 MB. Max. memory is 8.0 GB. [2021-02-22 02:23:14,682 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 168.8 MB. Free memory is still 140.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 02:23:14,683 INFO L168 Benchmark]: CACSL2BoogieTranslator took 244.91 ms. Allocated memory is still 168.8 MB. Free memory was 144.7 MB in the beginning and 135.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-22 02:23:14,684 INFO L168 Benchmark]: Boogie Preprocessor took 36.43 ms. Allocated memory is still 168.8 MB. Free memory was 135.2 MB in the beginning and 133.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-22 02:23:14,685 INFO L168 Benchmark]: RCFGBuilder took 476.49 ms. Allocated memory is still 168.8 MB. Free memory was 133.8 MB in the beginning and 118.8 MB in the end (delta: 15.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-02-22 02:23:14,685 INFO L168 Benchmark]: TraceAbstraction took 1493.06 ms. Allocated memory is still 168.8 MB. Free memory was 118.4 MB in the beginning and 76.1 MB in the end (delta: 42.2 MB). Peak memory consumption was 43.2 MB. Max. memory is 8.0 GB. [2021-02-22 02:23:14,689 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 168.8 MB. Free memory is still 140.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 244.91 ms. Allocated memory is still 168.8 MB. Free memory was 144.7 MB in the beginning and 135.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.43 ms. Allocated memory is still 168.8 MB. Free memory was 135.2 MB in the beginning and 133.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 476.49 ms. Allocated memory is still 168.8 MB. Free memory was 133.8 MB in the beginning and 118.8 MB in the end (delta: 15.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1493.06 ms. Allocated memory is still 168.8 MB. Free memory was 118.4 MB in the beginning and 76.1 MB in the end (delta: 42.2 MB). Peak memory consumption was 43.2 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...