/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-acceleration/const_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 02:21:35,242 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 02:21:35,245 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 02:21:35,279 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 02:21:35,312 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 02:21:35,314 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 02:21:35,318 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 02:21:35,320 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 02:21:35,322 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 02:21:35,335 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 02:21:35,340 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 02:21:35,344 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 02:21:35,351 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 02:21:35,352 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 02:21:35,354 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 02:21:35,357 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 02:21:35,366 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-22 02:21:35,380 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 02:21:35,381 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 02:21:35,381 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 02:21:35,387 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 02:21:35,410 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 02:21:35,411 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 02:21:35,415 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 02:21:35,416 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 02:21:35,416 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 02:21:35,416 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 02:21:35,416 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 02:21:35,416 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 02:21:35,417 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 02:21:35,417 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 02:21:35,418 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 02:21:35,418 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 02:21:35,418 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 02:21:35,419 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 02:21:35,419 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 02:21:35,419 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 02:21:35,420 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 02:21:35,420 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 02:21:35,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 02:21:35,420 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 02:21:35,420 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 02:21:35,421 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 02:21:35,421 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 02:21:35,421 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 02:21:35,846 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 02:21:35,891 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 02:21:35,895 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 02:21:35,897 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 02:21:35,898 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 02:21:35,899 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/const_1-1.c [2021-02-22 02:21:35,988 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82e773249/da6ed4e47f814e5d94b211ce831cfdbe/FLAG71d058f16 [2021-02-22 02:21:36,696 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 02:21:36,696 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/const_1-1.c [2021-02-22 02:21:36,704 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82e773249/da6ed4e47f814e5d94b211ce831cfdbe/FLAG71d058f16 [2021-02-22 02:21:37,065 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82e773249/da6ed4e47f814e5d94b211ce831cfdbe [2021-02-22 02:21:37,068 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 02:21:37,083 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 02:21:37,089 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 02:21:37,089 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 02:21:37,093 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 02:21:37,094 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:21:37" (1/1) ... [2021-02-22 02:21:37,095 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f119c54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:37, skipping insertion in model container [2021-02-22 02:21:37,096 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:21:37" (1/1) ... [2021-02-22 02:21:37,104 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 02:21:37,120 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 02:21:37,266 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-acceleration/const_1-1.c[321,334] [2021-02-22 02:21:37,277 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:21:37,288 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 02:21:37,303 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-acceleration/const_1-1.c[321,334] [2021-02-22 02:21:37,306 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:21:37,323 INFO L208 MainTranslator]: Completed translation [2021-02-22 02:21:37,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:37 WrapperNode [2021-02-22 02:21:37,324 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 02:21:37,325 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 02:21:37,325 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 02:21:37,326 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 02:21:37,339 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:37" (1/1) ... [2021-02-22 02:21:37,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:37" (1/1) ... [2021-02-22 02:21:37,347 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:37" (1/1) ... [2021-02-22 02:21:37,348 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:37" (1/1) ... [2021-02-22 02:21:37,354 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:37" (1/1) ... [2021-02-22 02:21:37,358 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:37" (1/1) ... [2021-02-22 02:21:37,359 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:37" (1/1) ... [2021-02-22 02:21:37,361 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 02:21:37,362 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 02:21:37,363 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 02:21:37,363 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 02:21:37,364 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:37" (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 02:21:37,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 02:21:37,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 02:21:37,472 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 02:21:37,472 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-22 02:21:37,473 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 02:21:37,473 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 02:21:37,473 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 02:21:37,473 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 02:21:37,474 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 02:21:37,474 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-22 02:21:37,474 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 02:21:37,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 02:21:37,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 02:21:37,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 02:21:37,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 02:21:37,475 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 02:21:37,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 02:21:37,879 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 02:21:37,881 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-22 02:21:37,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:21:37 BoogieIcfgContainer [2021-02-22 02:21:37,887 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 02:21:37,891 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 02:21:37,891 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 02:21:37,895 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 02:21:37,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 02:21:37" (1/3) ... [2021-02-22 02:21:37,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d62452a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:21:37, skipping insertion in model container [2021-02-22 02:21:37,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:37" (2/3) ... [2021-02-22 02:21:37,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d62452a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:21:37, skipping insertion in model container [2021-02-22 02:21:37,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:21:37" (3/3) ... [2021-02-22 02:21:37,899 INFO L111 eAbstractionObserver]: Analyzing ICFG const_1-1.c [2021-02-22 02:21:37,907 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 02:21:37,912 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 02:21:37,937 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 02:21:38,004 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 02:21:38,005 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 02:21:38,005 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 02:21:38,005 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 02:21:38,005 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 02:21:38,006 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 02:21:38,006 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 02:21:38,006 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 02:21:38,060 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2021-02-22 02:21:38,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-22 02:21:38,076 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:21:38,077 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 02:21:38,078 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:21:38,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:21:38,087 INFO L82 PathProgramCache]: Analyzing trace with hash 645207053, now seen corresponding path program 1 times [2021-02-22 02:21:38,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:21:38,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271827742] [2021-02-22 02:21:38,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:21:38,192 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:21:38,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:38,350 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:38,352 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:38,354 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:38,355 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:21:38,372 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:38,373 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:38,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:21:38,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:38,460 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:38,462 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:38,467 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 02:21:38,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271827742] [2021-02-22 02:21:38,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:21:38,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-22 02:21:38,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95803680] [2021-02-22 02:21:38,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-22 02:21:38,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:21:38,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-22 02:21:38,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-22 02:21:38,500 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 4 states. [2021-02-22 02:21:38,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:21:38,756 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2021-02-22 02:21:38,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-22 02:21:38,759 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2021-02-22 02:21:38,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:21:38,768 INFO L225 Difference]: With dead ends: 46 [2021-02-22 02:21:38,768 INFO L226 Difference]: Without dead ends: 28 [2021-02-22 02:21:38,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-22 02:21:38,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-02-22 02:21:38,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2021-02-22 02:21:38,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-02-22 02:21:38,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2021-02-22 02:21:38,823 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 19 [2021-02-22 02:21:38,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:21:38,824 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2021-02-22 02:21:38,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-22 02:21:38,824 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2021-02-22 02:21:38,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-22 02:21:38,825 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:21:38,826 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] [2021-02-22 02:21:38,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 02:21:38,826 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:21:38,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:21:38,827 INFO L82 PathProgramCache]: Analyzing trace with hash -567626551, now seen corresponding path program 1 times [2021-02-22 02:21:38,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:21:38,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1394519437] [2021-02-22 02:21:38,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:21:38,974 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-02-22 02:21:38,994 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:39,009 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-22 02:21:39,016 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:39,019 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-22 02:21:39,030 WARN L141 QuantifierPusher]: treesize reduction 6, result has 76.0 percent of original size [2021-02-22 02:21:39,047 INFO L723 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2021-02-22 02:21:39,052 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:39,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:21:39,055 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:39,061 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-22 02:21:39,065 WARN L147 QuantifierPusher]: treesize reduction 6, result has 76.0 percent of original size 19 [2021-02-22 02:21:39,071 WARN L141 QuantifierPusher]: treesize reduction 5, result has 86.8 percent of original size [2021-02-22 02:21:39,075 WARN L147 QuantifierPusher]: treesize reduction 5, result has 86.8 percent of original size 33 [2021-02-22 02:21:39,077 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:39,080 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-22 02:21:39,082 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:39,084 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-22 02:21:39,091 WARN L141 QuantifierPusher]: treesize reduction 6, result has 76.0 percent of original size [2021-02-22 02:21:39,093 INFO L723 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2021-02-22 02:21:39,095 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:39,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:21:39,097 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:39,102 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-22 02:21:39,104 WARN L147 QuantifierPusher]: treesize reduction 6, result has 76.0 percent of original size 19 [2021-02-22 02:21:39,107 WARN L141 QuantifierPusher]: treesize reduction 5, result has 86.8 percent of original size [2021-02-22 02:21:39,111 WARN L147 QuantifierPusher]: treesize reduction 5, result has 86.8 percent of original size 33 [2021-02-22 02:21:39,113 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:39,115 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-02-22 02:21:39,117 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:39,120 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-02-22 02:21:39,126 WARN L141 QuantifierPusher]: treesize reduction 8, result has 72.4 percent of original size [2021-02-22 02:21:39,128 INFO L723 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2021-02-22 02:21:39,131 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:39,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:21:39,133 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:39,137 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-22 02:21:39,139 WARN L147 QuantifierPusher]: treesize reduction 8, result has 72.4 percent of original size 21 [2021-02-22 02:21:39,142 WARN L141 QuantifierPusher]: treesize reduction 5, result has 87.8 percent of original size [2021-02-22 02:21:39,145 WARN L147 QuantifierPusher]: treesize reduction 5, result has 87.8 percent of original size 36 [2021-02-22 02:21:39,146 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-22 02:21:39,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 02:21:39,191 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 02:21:39,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 02:21:39,242 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 02:21:39,293 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-22 02:21:39,294 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-22 02:21:39,301 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-22 02:21:39,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 02:21:39 BoogieIcfgContainer [2021-02-22 02:21:39,318 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-22 02:21:39,321 INFO L168 Benchmark]: Toolchain (without parser) took 2248.66 ms. Allocated memory is still 159.4 MB. Free memory was 136.3 MB in the beginning and 74.2 MB in the end (delta: 62.1 MB). Peak memory consumption was 61.9 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:39,324 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 159.4 MB. Free memory is still 132.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 02:21:39,325 INFO L168 Benchmark]: CACSL2BoogieTranslator took 235.45 ms. Allocated memory is still 159.4 MB. Free memory was 135.2 MB in the beginning and 125.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:39,327 INFO L168 Benchmark]: Boogie Preprocessor took 36.48 ms. Allocated memory is still 159.4 MB. Free memory was 125.5 MB in the beginning and 124.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:39,328 INFO L168 Benchmark]: RCFGBuilder took 524.82 ms. Allocated memory is still 159.4 MB. Free memory was 124.0 MB in the beginning and 111.1 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:39,333 INFO L168 Benchmark]: TraceAbstraction took 1427.48 ms. Allocated memory is still 159.4 MB. Free memory was 110.6 MB in the beginning and 74.2 MB in the end (delta: 36.4 MB). Peak memory consumption was 35.7 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:39,342 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 159.4 MB. Free memory is still 132.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 235.45 ms. Allocated memory is still 159.4 MB. Free memory was 135.2 MB in the beginning and 125.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.48 ms. Allocated memory is still 159.4 MB. Free memory was 125.5 MB in the beginning and 124.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 524.82 ms. Allocated memory is still 159.4 MB. Free memory was 124.0 MB in the beginning and 111.1 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1427.48 ms. Allocated memory is still 159.4 MB. Free memory was 110.6 MB in the beginning and 74.2 MB in the end (delta: 36.4 MB). Peak memory consumption was 35.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L13] unsigned int x = 1; [L14] unsigned int y = 0; [L16] COND TRUE y < 1024 [L17] x = 0 [L18] y++ [L16] COND FALSE !(y < 1024) [L21] CALL __VERIFIER_assert(x == 0) [L6] COND TRUE !(cond) [L7] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 27 SDtfs, 21 SDslu, 19 SDs, 0 SdLazy, 25 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 3 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...