/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-invariants/eq1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 02:24:51,129 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 02:24:51,132 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 02:24:51,179 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 02:24:51,198 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 02:24:51,200 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 02:24:51,201 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 02:24:51,203 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 02:24:51,205 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 02:24:51,222 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 02:24:51,225 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 02:24:51,229 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 02:24:51,232 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 02:24:51,236 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 02:24:51,237 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 02:24:51,242 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 02:24:51,249 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-22 02:24:51,278 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 02:24:51,280 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 02:24:51,283 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 02:24:51,284 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 02:24:51,308 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 02:24:51,309 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 02:24:51,313 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 02:24:51,314 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 02:24:51,314 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 02:24:51,315 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 02:24:51,315 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 02:24:51,315 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 02:24:51,315 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 02:24:51,316 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 02:24:51,317 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 02:24:51,318 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 02:24:51,318 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 02:24:51,318 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 02:24:51,320 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 02:24:51,320 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 02:24:51,320 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 02:24:51,321 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 02:24:51,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 02:24:51,321 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 02:24:51,321 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 02:24:51,322 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 02:24:51,322 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 02:24:51,322 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 02:24:51,841 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 02:24:51,899 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 02:24:51,904 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 02:24:51,906 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 02:24:51,907 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 02:24:51,908 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invariants/eq1.c [2021-02-22 02:24:52,007 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55beed573/d6afdac5aac04fdf875f6c9963ab7106/FLAG8fc9ef008 [2021-02-22 02:24:52,713 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 02:24:52,714 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/eq1.c [2021-02-22 02:24:52,723 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55beed573/d6afdac5aac04fdf875f6c9963ab7106/FLAG8fc9ef008 [2021-02-22 02:24:53,076 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55beed573/d6afdac5aac04fdf875f6c9963ab7106 [2021-02-22 02:24:53,081 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 02:24:53,096 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 02:24:53,105 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 02:24:53,105 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 02:24:53,109 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 02:24:53,111 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:24:53" (1/1) ... [2021-02-22 02:24:53,114 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a2f8a38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:53, skipping insertion in model container [2021-02-22 02:24:53,114 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:24:53" (1/1) ... [2021-02-22 02:24:53,126 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 02:24:53,157 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 02:24:53,436 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-invariants/eq1.c[364,377] [2021-02-22 02:24:53,461 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:24:53,478 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 02:24:53,499 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-invariants/eq1.c[364,377] [2021-02-22 02:24:53,504 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:24:53,527 INFO L208 MainTranslator]: Completed translation [2021-02-22 02:24:53,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:53 WrapperNode [2021-02-22 02:24:53,528 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 02:24:53,530 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 02:24:53,530 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 02:24:53,531 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 02:24:53,552 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:53" (1/1) ... [2021-02-22 02:24:53,553 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:53" (1/1) ... [2021-02-22 02:24:53,567 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:53" (1/1) ... [2021-02-22 02:24:53,567 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:53" (1/1) ... [2021-02-22 02:24:53,586 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:53" (1/1) ... [2021-02-22 02:24:53,592 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:53" (1/1) ... [2021-02-22 02:24:53,602 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:53" (1/1) ... [2021-02-22 02:24:53,610 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 02:24:53,613 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 02:24:53,614 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 02:24:53,614 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 02:24:53,616 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:53" (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 02:24:53,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 02:24:53,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 02:24:53,784 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 02:24:53,785 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-22 02:24:53,785 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 02:24:53,785 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 02:24:53,786 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 02:24:53,786 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 02:24:53,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 02:24:53,787 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-02-22 02:24:53,788 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-22 02:24:53,788 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 02:24:53,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 02:24:53,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 02:24:53,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 02:24:53,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 02:24:53,791 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 02:24:53,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 02:24:54,405 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 02:24:54,405 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-22 02:24:54,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:24:54 BoogieIcfgContainer [2021-02-22 02:24:54,407 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 02:24:54,409 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 02:24:54,409 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 02:24:54,414 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 02:24:54,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 02:24:53" (1/3) ... [2021-02-22 02:24:54,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4205fa23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:24:54, skipping insertion in model container [2021-02-22 02:24:54,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:53" (2/3) ... [2021-02-22 02:24:54,416 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4205fa23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:24:54, skipping insertion in model container [2021-02-22 02:24:54,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:24:54" (3/3) ... [2021-02-22 02:24:54,419 INFO L111 eAbstractionObserver]: Analyzing ICFG eq1.c [2021-02-22 02:24:54,427 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 02:24:54,436 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 02:24:54,461 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 02:24:54,493 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 02:24:54,493 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 02:24:54,493 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 02:24:54,494 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 02:24:54,494 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 02:24:54,494 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 02:24:54,494 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 02:24:54,494 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 02:24:54,516 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2021-02-22 02:24:54,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-22 02:24:54,528 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:24:54,530 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] [2021-02-22 02:24:54,530 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:24:54,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:24:54,539 INFO L82 PathProgramCache]: Analyzing trace with hash -713805134, now seen corresponding path program 1 times [2021-02-22 02:24:54,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:24:54,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542312866] [2021-02-22 02:24:54,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:24:54,655 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:24:54,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:24:54,886 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:24:54,888 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:24:54,890 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:24:54,891 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:24:54,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:24:54,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:24:54,987 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:24:54,988 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:24:55,000 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 02:24:55,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542312866] [2021-02-22 02:24:55,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:24:55,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-22 02:24:55,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901994965] [2021-02-22 02:24:55,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-22 02:24:55,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:24:55,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-22 02:24:55,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-22 02:24:55,034 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 3 states. [2021-02-22 02:24:55,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:24:55,217 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2021-02-22 02:24:55,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-22 02:24:55,219 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2021-02-22 02:24:55,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:24:55,230 INFO L225 Difference]: With dead ends: 67 [2021-02-22 02:24:55,230 INFO L226 Difference]: Without dead ends: 47 [2021-02-22 02:24:55,236 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 02:24:55,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-02-22 02:24:55,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-02-22 02:24:55,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-02-22 02:24:55,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2021-02-22 02:24:55,312 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 29 [2021-02-22 02:24:55,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:24:55,312 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2021-02-22 02:24:55,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-22 02:24:55,313 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2021-02-22 02:24:55,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-22 02:24:55,314 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:24:55,315 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] [2021-02-22 02:24:55,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 02:24:55,315 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:24:55,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:24:55,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1452537245, now seen corresponding path program 1 times [2021-02-22 02:24:55,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:24:55,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1305380590] [2021-02-22 02:24:55,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:24:55,325 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:24:55,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:24:55,568 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:24:55,573 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:24:55,575 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:24:55,577 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:24:55,603 WARN L141 QuantifierPusher]: treesize reduction 8, result has 46.7 percent of original size [2021-02-22 02:24:55,605 WARN L147 QuantifierPusher]: treesize reduction 8, result has 46.7 percent of original size 7 [2021-02-22 02:24:55,619 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:24:55,620 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:24:55,632 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:24:55,633 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:24:55,646 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:24:55,648 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:24:55,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:24:55,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:24:55,726 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:24:55,728 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:24:55,733 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 02:24:55,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1305380590] [2021-02-22 02:24:55,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:24:55,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-22 02:24:55,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404462444] [2021-02-22 02:24:55,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-22 02:24:55,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:24:55,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-22 02:24:55,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-02-22 02:24:55,740 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 7 states. [2021-02-22 02:24:56,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:24:56,357 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2021-02-22 02:24:56,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-22 02:24:56,358 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2021-02-22 02:24:56,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:24:56,367 INFO L225 Difference]: With dead ends: 77 [2021-02-22 02:24:56,367 INFO L226 Difference]: Without dead ends: 71 [2021-02-22 02:24:56,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-02-22 02:24:56,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-02-22 02:24:56,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2021-02-22 02:24:56,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-02-22 02:24:56,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-02-22 02:24:56,416 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 30 [2021-02-22 02:24:56,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:24:56,417 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-02-22 02:24:56,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-22 02:24:56,423 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-02-22 02:24:56,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-02-22 02:24:56,428 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:24:56,428 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 02:24:56,434 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 02:24:56,435 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:24:56,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:24:56,436 INFO L82 PathProgramCache]: Analyzing trace with hash 253640520, now seen corresponding path program 1 times [2021-02-22 02:24:56,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:24:56,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [578016428] [2021-02-22 02:24:56,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:24:56,868 WARN L202 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-02-22 02:24:56,880 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 02:24:56,886 INFO L168 Benchmark]: Toolchain (without parser) took 3801.41 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 126.7 MB in the beginning and 161.5 MB in the end (delta: -34.8 MB). Peak memory consumption was 80.0 MB. Max. memory is 8.0 GB. [2021-02-22 02:24:56,888 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory was 125.1 MB in the beginning and 125.1 MB in the end (delta: 81.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 02:24:56,889 INFO L168 Benchmark]: CACSL2BoogieTranslator took 424.18 ms. Allocated memory is still 151.0 MB. Free memory was 125.7 MB in the beginning and 116.2 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-22 02:24:56,890 INFO L168 Benchmark]: Boogie Preprocessor took 80.50 ms. Allocated memory is still 151.0 MB. Free memory was 116.2 MB in the beginning and 114.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-22 02:24:56,893 INFO L168 Benchmark]: RCFGBuilder took 793.74 ms. Allocated memory is still 151.0 MB. Free memory was 114.6 MB in the beginning and 130.4 MB in the end (delta: -15.8 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-02-22 02:24:56,895 INFO L168 Benchmark]: TraceAbstraction took 2475.28 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 129.9 MB in the beginning and 161.5 MB in the end (delta: -31.6 MB). Peak memory consumption was 82.7 MB. Max. memory is 8.0 GB. [2021-02-22 02:24:56,908 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory was 125.1 MB in the beginning and 125.1 MB in the end (delta: 81.6 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 424.18 ms. Allocated memory is still 151.0 MB. Free memory was 125.7 MB in the beginning and 116.2 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 80.50 ms. Allocated memory is still 151.0 MB. Free memory was 116.2 MB in the beginning and 114.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 793.74 ms. Allocated memory is still 151.0 MB. Free memory was 114.6 MB in the beginning and 130.4 MB in the end (delta: -15.8 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2475.28 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 129.9 MB in the beginning and 161.5 MB in the end (delta: -31.6 MB). Peak memory consumption was 82.7 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...