/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/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-acceleration/simple_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-a47f07a [2021-04-16 07:09:26,150 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-16 07:09:26,153 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-16 07:09:26,191 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-16 07:09:26,209 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-04-16 07:09:26,211 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-04-16 07:09:26,213 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-04-16 07:09:26,215 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-04-16 07:09:26,217 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-04-16 07:09:26,218 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-04-16 07:09:26,221 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-04-16 07:09:26,230 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-04-16 07:09:26,234 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-04-16 07:09:26,241 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-04-16 07:09:26,243 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-04-16 07:09:26,245 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-04-16 07:09:26,249 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-04-16 07:09:26,275 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-04-16 07:09:26,277 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-04-16 07:09:26,278 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-04-16 07:09:26,281 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-04-16 07:09:26,299 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-16 07:09:26,300 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-16 07:09:26,302 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-16 07:09:26,303 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-16 07:09:26,303 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-16 07:09:26,303 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-16 07:09:26,303 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-16 07:09:26,304 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-16 07:09:26,304 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-16 07:09:26,304 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-16 07:09:26,304 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-16 07:09:26,304 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-16 07:09:26,305 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-16 07:09:26,305 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-16 07:09:26,305 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-16 07:09:26,305 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-16 07:09:26,306 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-16 07:09:26,306 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-16 07:09:26,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-16 07:09:26,306 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-16 07:09:26,306 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-04-16 07:09:26,307 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-16 07:09:26,307 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-04-16 07:09:26,307 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-16 07:09:26,915 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-16 07:09:26,963 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-16 07:09:26,970 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-16 07:09:26,972 INFO L271 PluginConnector]: Initializing CDTParser... [2021-04-16 07:09:26,974 INFO L275 PluginConnector]: CDTParser initialized [2021-04-16 07:09:26,983 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/simple_1-1.c [2021-04-16 07:09:27,113 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b02ce7cc3/2b0777d518ba46bb9e3146bbf5cccf7a/FLAG65f755dd5 [2021-04-16 07:09:28,041 INFO L306 CDTParser]: Found 1 translation units. [2021-04-16 07:09:28,043 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/simple_1-1.c [2021-04-16 07:09:28,053 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b02ce7cc3/2b0777d518ba46bb9e3146bbf5cccf7a/FLAG65f755dd5 [2021-04-16 07:09:28,090 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b02ce7cc3/2b0777d518ba46bb9e3146bbf5cccf7a [2021-04-16 07:09:28,095 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-16 07:09:28,102 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-16 07:09:28,112 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-04-16 07:09:28,112 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-04-16 07:09:28,117 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-04-16 07:09:28,119 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.04 07:09:28" (1/1) ... [2021-04-16 07:09:28,122 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@258b8ed1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:09:28, skipping insertion in model container [2021-04-16 07:09:28,122 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.04 07:09:28" (1/1) ... [2021-04-16 07:09:28,133 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-04-16 07:09:28,159 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-04-16 07:09:28,397 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/simple_1-1.c[322,335] [2021-04-16 07:09:28,429 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-16 07:09:28,451 INFO L203 MainTranslator]: Completed pre-run [2021-04-16 07:09:28,473 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/simple_1-1.c[322,335] [2021-04-16 07:09:28,491 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-16 07:09:28,516 INFO L208 MainTranslator]: Completed translation [2021-04-16 07:09:28,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:09:28 WrapperNode [2021-04-16 07:09:28,517 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-04-16 07:09:28,519 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-16 07:09:28,520 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-16 07:09:28,520 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-16 07:09:28,538 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:09:28" (1/1) ... [2021-04-16 07:09:28,538 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:09:28" (1/1) ... [2021-04-16 07:09:28,550 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:09:28" (1/1) ... [2021-04-16 07:09:28,551 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:09:28" (1/1) ... [2021-04-16 07:09:28,620 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:09:28" (1/1) ... [2021-04-16 07:09:28,634 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:09:28" (1/1) ... [2021-04-16 07:09:28,644 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:09:28" (1/1) ... [2021-04-16 07:09:28,669 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-16 07:09:28,685 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-16 07:09:28,685 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-16 07:09:28,685 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-16 07:09:28,687 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:09:28" (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 [2021-04-16 07:09:28,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-04-16 07:09:28,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-16 07:09:28,826 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-04-16 07:09:28,826 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-04-16 07:09:28,826 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-04-16 07:09:28,827 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-04-16 07:09:28,828 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-04-16 07:09:28,828 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-04-16 07:09:28,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-04-16 07:09:28,828 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-04-16 07:09:28,829 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-04-16 07:09:28,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-04-16 07:09:28,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-04-16 07:09:28,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-16 07:09:28,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-04-16 07:09:28,830 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-04-16 07:09:28,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-04-16 07:09:29,224 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-16 07:09:29,224 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-04-16 07:09:29,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 07:09:29 BoogieIcfgContainer [2021-04-16 07:09:29,228 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-16 07:09:29,230 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-16 07:09:29,231 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-16 07:09:29,237 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-16 07:09:29,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.04 07:09:28" (1/3) ... [2021-04-16 07:09:29,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d7ab12f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.04 07:09:29, skipping insertion in model container [2021-04-16 07:09:29,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:09:28" (2/3) ... [2021-04-16 07:09:29,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d7ab12f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.04 07:09:29, skipping insertion in model container [2021-04-16 07:09:29,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 07:09:29" (3/3) ... [2021-04-16 07:09:29,243 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_1-1.c [2021-04-16 07:09:29,254 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-04-16 07:09:29,261 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-16 07:09:29,291 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-04-16 07:09:29,341 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-16 07:09:29,342 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-16 07:09:29,342 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-04-16 07:09:29,342 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-16 07:09:29,342 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-16 07:09:29,343 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-16 07:09:29,344 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-16 07:09:29,344 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-16 07:09:29,379 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-04-16 07:09:29,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-04-16 07:09:29,392 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 07:09:29,393 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 07:09:29,394 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 07:09:29,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 07:09:29,410 INFO L82 PathProgramCache]: Analyzing trace with hash -219174432, now seen corresponding path program 1 times [2021-04-16 07:09:29,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 07:09:29,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1730047289] [2021-04-16 07:09:29,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 07:09:29,530 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 07:09:29,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 07:09:29,723 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:09:29,726 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:09:29,729 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:09:29,732 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:09:29,884 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-04-16 07:09:29,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 07:09:29,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 07:09:29,919 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:09:29,921 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:09:29,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-16 07:09:29,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1730047289] [2021-04-16 07:09:29,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 07:09:29,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-16 07:09:29,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160209843] [2021-04-16 07:09:29,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-16 07:09:29,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 07:09:29,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-16 07:09:29,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-16 07:09:29,973 INFO L87 Difference]: Start difference. First operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-16 07:09:30,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 07:09:30,158 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-04-16 07:09:30,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-16 07:09:30,165 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-04-16 07:09:30,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 07:09:30,177 INFO L225 Difference]: With dead ends: 29 [2021-04-16 07:09:30,178 INFO L226 Difference]: Without dead ends: 12 [2021-04-16 07:09:30,182 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 151.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-16 07:09:30,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-04-16 07:09:30,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-04-16 07:09:30,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-16 07:09:30,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2021-04-16 07:09:30,253 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 11 [2021-04-16 07:09:30,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 07:09:30,255 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2021-04-16 07:09:30,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-16 07:09:30,256 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2021-04-16 07:09:30,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-04-16 07:09:30,258 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 07:09:30,259 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 07:09:30,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-16 07:09:30,260 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 07:09:30,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 07:09:30,263 INFO L82 PathProgramCache]: Analyzing trace with hash -222868516, now seen corresponding path program 1 times [2021-04-16 07:09:30,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 07:09:30,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1069511781] [2021-04-16 07:09:30,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 07:09:30,284 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 07:09:30,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 07:09:30,406 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:09:30,407 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:09:30,410 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:09:30,412 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 07:09:30,454 INFO L142 QuantifierPusher]: treesize reduction 1, result has 97.4 percent of original size [2021-04-16 07:09:30,465 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-04-16 07:09:30,473 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:09:30,474 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:09:30,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 07:09:30,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 07:09:30,563 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:09:30,564 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:09:30,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-16 07:09:30,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1069511781] [2021-04-16 07:09:30,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 07:09:30,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-16 07:09:30,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691608330] [2021-04-16 07:09:30,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-16 07:09:30,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 07:09:30,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-16 07:09:30,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-16 07:09:30,568 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-16 07:09:30,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 07:09:30,657 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-04-16 07:09:30,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-16 07:09:30,657 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-04-16 07:09:30,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 07:09:30,658 INFO L225 Difference]: With dead ends: 18 [2021-04-16 07:09:30,658 INFO L226 Difference]: Without dead ends: 13 [2021-04-16 07:09:30,660 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 111.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-16 07:09:30,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-04-16 07:09:30,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-04-16 07:09:30,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-16 07:09:30,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-04-16 07:09:30,666 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2021-04-16 07:09:30,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 07:09:30,666 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-04-16 07:09:30,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-16 07:09:30,667 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-04-16 07:09:30,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-04-16 07:09:30,667 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 07:09:30,667 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 07:09:30,667 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-16 07:09:30,668 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 07:09:30,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 07:09:30,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1717471862, now seen corresponding path program 1 times [2021-04-16 07:09:30,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 07:09:30,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1559658063] [2021-04-16 07:09:30,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 07:09:30,721 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:09:30,737 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-04-16 07:09:30,738 INFO L175 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~x~0_8 4294967296) 268435455) InVars {main_~x~0=v_main_~x~0_8} OutVars{main_~x~0=v_main_~x~0_8} AuxVars[] AssignedVars[] [2021-04-16 07:09:30,757 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.5 percent of original size [2021-04-16 07:09:30,767 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:09:30,773 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:09:30,782 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:09:30,790 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:09:30,868 INFO L108 tifierPushTermWalker]: treesize reduction 13, result has 7.1 percent of original size [2021-04-16 07:09:30,889 INFO L108 tifierPushTermWalker]: treesize reduction 2, result has 33.3 percent of original size [2021-04-16 07:09:30,932 INFO L108 tifierPushTermWalker]: treesize reduction 13, result has 7.1 percent of original size [2021-04-16 07:09:30,955 INFO L108 tifierPushTermWalker]: treesize reduction 28, result has 3.4 percent of original size [2021-04-16 07:09:30,980 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:09:30,997 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-04-16 07:09:31,008 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:09:31,018 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:09:31,029 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:09:31,050 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:09:31,056 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:09:31,058 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.5 percent of original size 58 [2021-04-16 07:09:31,236 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-04-16 07:09:31,247 INFO L142 QuantifierPusher]: treesize reduction 8, result has 90.8 percent of original size [2021-04-16 07:09:31,250 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 79 [2021-04-16 07:09:31,253 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-04-16 07:09:31,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-04-16 07:09:31,355 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-04-16 07:09:31,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-04-16 07:09:31,419 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-04-16 07:09:31,470 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-04-16 07:09:31,471 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-04-16 07:09:31,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-04-16 07:09:31,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.04 07:09:31 BoogieIcfgContainer [2021-04-16 07:09:31,494 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-16 07:09:31,498 INFO L168 Benchmark]: Toolchain (without parser) took 3394.68 ms. Allocated memory is still 187.7 MB. Free memory was 154.5 MB in the beginning and 154.4 MB in the end (delta: 90.5 kB). Peak memory consumption was 923.2 kB. Max. memory is 8.0 GB. [2021-04-16 07:09:31,499 INFO L168 Benchmark]: CDTParser took 0.69 ms. Allocated memory is still 187.7 MB. Free memory is still 171.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-04-16 07:09:31,502 INFO L168 Benchmark]: CACSL2BoogieTranslator took 405.78 ms. Allocated memory is still 187.7 MB. Free memory was 154.3 MB in the beginning and 145.2 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-04-16 07:09:31,503 INFO L168 Benchmark]: Boogie Preprocessor took 151.07 ms. Allocated memory is still 187.7 MB. Free memory was 145.1 MB in the beginning and 172.3 MB in the end (delta: -27.2 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. [2021-04-16 07:09:31,510 INFO L168 Benchmark]: RCFGBuilder took 543.36 ms. Allocated memory is still 187.7 MB. Free memory was 172.0 MB in the beginning and 159.6 MB in the end (delta: 12.4 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-04-16 07:09:31,510 INFO L168 Benchmark]: TraceAbstraction took 2264.20 ms. Allocated memory is still 187.7 MB. Free memory was 159.4 MB in the beginning and 154.4 MB in the end (delta: 5.0 MB). Peak memory consumption was 6.1 MB. Max. memory is 8.0 GB. [2021-04-16 07:09:31,516 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.69 ms. Allocated memory is still 187.7 MB. Free memory is still 171.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 405.78 ms. Allocated memory is still 187.7 MB. Free memory was 154.3 MB in the beginning and 145.2 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 151.07 ms. Allocated memory is still 187.7 MB. Free memory was 145.1 MB in the beginning and 172.3 MB in the end (delta: -27.2 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. * RCFGBuilder took 543.36 ms. Allocated memory is still 187.7 MB. Free memory was 172.0 MB in the beginning and 159.6 MB in the end (delta: 12.4 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2264.20 ms. Allocated memory is still 187.7 MB. Free memory was 159.4 MB in the beginning and 154.4 MB in the end (delta: 5.0 MB). Peak memory consumption was 6.1 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 = 0; [L15] COND TRUE x < 0x0fffffff [L16] x += 2 [L15] COND FALSE !(x < 0x0fffffff) [L19] CALL __VERIFIER_assert(x % 2) [L6] COND TRUE !(cond) [L7] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2139.5ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 27.9ms, AutomataDifference: 325.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 21.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 26 SDtfs, 15 SDslu, 10 SDs, 0 SdLazy, 13 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 108.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 263.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, InterpolantAutomatonStates: 7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 55.1ms AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 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...