/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-invariants/linear-inequality-inv-b.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-1a84f73 [2021-05-01 08:07:25,445 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-01 08:07:25,448 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-01 08:07:25,490 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-01 08:07:25,511 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-01 08:07:25,513 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-01 08:07:25,514 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-01 08:07:25,515 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-01 08:07:25,518 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-01 08:07:25,519 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-01 08:07:25,521 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-01 08:07:25,527 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-01 08:07:25,528 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-01 08:07:25,529 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-01 08:07:25,530 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-01 08:07:25,532 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-01 08:07:25,538 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-01 08:07:25,567 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-01 08:07:25,568 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-01 08:07:25,570 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-01 08:07:25,572 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-01 08:07:25,587 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-01 08:07:25,588 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-01 08:07:25,591 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-01 08:07:25,591 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-01 08:07:25,591 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-01 08:07:25,591 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-01 08:07:25,592 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-01 08:07:25,592 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-01 08:07:25,592 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-01 08:07:25,592 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-01 08:07:25,593 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-01 08:07:25,593 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-01 08:07:25,593 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-01 08:07:25,594 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-01 08:07:25,594 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-01 08:07:25,594 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-01 08:07:25,594 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-01 08:07:25,594 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-01 08:07:25,595 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 08:07:25,595 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-01 08:07:25,595 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-01 08:07:25,595 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-01 08:07:25,595 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-01 08:07:25,595 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-01 08:07:26,181 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-01 08:07:26,215 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-01 08:07:26,225 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-01 08:07:26,226 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-01 08:07:26,227 INFO L275 PluginConnector]: CDTParser initialized [2021-05-01 08:07:26,227 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invariants/linear-inequality-inv-b.c [2021-05-01 08:07:26,333 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1228e2375/2aaa712f56d94600a08c9467e14c7004/FLAGe3b3fb96e [2021-05-01 08:07:27,011 INFO L306 CDTParser]: Found 1 translation units. [2021-05-01 08:07:27,012 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/linear-inequality-inv-b.c [2021-05-01 08:07:27,042 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1228e2375/2aaa712f56d94600a08c9467e14c7004/FLAGe3b3fb96e [2021-05-01 08:07:27,060 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1228e2375/2aaa712f56d94600a08c9467e14c7004 [2021-05-01 08:07:27,066 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-01 08:07:27,075 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-01 08:07:27,077 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-01 08:07:27,078 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-01 08:07:27,095 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-01 08:07:27,096 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:07:27" (1/1) ... [2021-05-01 08:07:27,097 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d74be46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:07:27, skipping insertion in model container [2021-05-01 08:07:27,097 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:07:27" (1/1) ... [2021-05-01 08:07:27,103 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-01 08:07:27,128 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-01 08:07:27,325 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/linear-inequality-inv-b.c[557,570] [2021-05-01 08:07:27,328 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/linear-inequality-inv-b.c[613,626] [2021-05-01 08:07:27,329 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:07:27,339 INFO L203 MainTranslator]: Completed pre-run [2021-05-01 08:07:27,410 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/linear-inequality-inv-b.c[557,570] [2021-05-01 08:07:27,411 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/linear-inequality-inv-b.c[613,626] [2021-05-01 08:07:27,412 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:07:27,431 INFO L208 MainTranslator]: Completed translation [2021-05-01 08:07:27,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:07:27 WrapperNode [2021-05-01 08:07:27,432 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-01 08:07:27,433 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-01 08:07:27,434 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-01 08:07:27,434 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-01 08:07:27,442 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:07:27" (1/1) ... [2021-05-01 08:07:27,442 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:07:27" (1/1) ... [2021-05-01 08:07:27,449 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:07:27" (1/1) ... [2021-05-01 08:07:27,450 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:07:27" (1/1) ... [2021-05-01 08:07:27,465 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:07:27" (1/1) ... [2021-05-01 08:07:27,468 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:07:27" (1/1) ... [2021-05-01 08:07:27,469 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:07:27" (1/1) ... [2021-05-01 08:07:27,470 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-01 08:07:27,471 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-01 08:07:27,471 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-01 08:07:27,471 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-01 08:07:27,472 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:07:27" (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 [2021-05-01 08:07:27,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-01 08:07:27,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-01 08:07:27,598 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-01 08:07:27,598 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-01 08:07:27,599 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-01 08:07:27,599 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-01 08:07:27,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-01 08:07:27,599 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2021-05-01 08:07:27,599 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-01 08:07:27,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-01 08:07:27,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-01 08:07:27,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-01 08:07:27,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-01 08:07:27,600 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-01 08:07:27,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-01 08:07:27,888 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-01 08:07:27,888 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-01 08:07:27,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:07:27 BoogieIcfgContainer [2021-05-01 08:07:27,889 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-01 08:07:27,891 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-01 08:07:27,891 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-01 08:07:27,893 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-01 08:07:27,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 08:07:27" (1/3) ... [2021-05-01 08:07:27,894 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b4f4ffe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:07:27, skipping insertion in model container [2021-05-01 08:07:27,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:07:27" (2/3) ... [2021-05-01 08:07:27,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b4f4ffe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:07:27, skipping insertion in model container [2021-05-01 08:07:27,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:07:27" (3/3) ... [2021-05-01 08:07:27,896 INFO L111 eAbstractionObserver]: Analyzing ICFG linear-inequality-inv-b.c [2021-05-01 08:07:27,918 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-01 08:07:27,936 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-05-01 08:07:27,964 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-05-01 08:07:27,983 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-01 08:07:27,984 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-01 08:07:27,984 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-01 08:07:27,984 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-01 08:07:27,984 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-01 08:07:27,984 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-01 08:07:27,984 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-01 08:07:27,984 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-01 08:07:28,001 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-01 08:07:28,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-05-01 08:07:28,014 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:07:28,014 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 08:07:28,015 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:07:28,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:07:28,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1624254505, now seen corresponding path program 1 times [2021-05-01 08:07:28,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:07:28,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945302466] [2021-05-01 08:07:28,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:07:28,088 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:07:28,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:07:28,197 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:07:28,205 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:07:28,229 INFO L142 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-05-01 08:07:28,238 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-01 08:07:28,269 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:07:28,270 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:07:28,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:07:28,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:07:28,321 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:07:28,322 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:07:28,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 08:07:28,325 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:07:28,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1945302466] [2021-05-01 08:07:28,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1945302466] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:07:28,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:07:28,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-01 08:07:28,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593192047] [2021-05-01 08:07:28,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-01 08:07:28,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:07:28,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-01 08:07:28,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-01 08:07:28,344 INFO L87 Difference]: Start difference. First operand has 18 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-01 08:07:28,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:07:28,449 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2021-05-01 08:07:28,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-01 08:07:28,451 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), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-05-01 08:07:28,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:07:28,457 INFO L225 Difference]: With dead ends: 27 [2021-05-01 08:07:28,457 INFO L226 Difference]: Without dead ends: 12 [2021-05-01 08:07:28,460 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 97.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-01 08:07:28,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-05-01 08:07:28,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-05-01 08:07:28,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-01 08:07:28,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2021-05-01 08:07:28,501 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2021-05-01 08:07:28,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:07:28,502 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2021-05-01 08:07:28,502 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), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-01 08:07:28,502 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2021-05-01 08:07:28,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-01 08:07:28,503 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:07:28,503 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 08:07:28,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-01 08:07:28,503 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:07:28,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:07:28,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1187666007, now seen corresponding path program 1 times [2021-05-01 08:07:28,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:07:28,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369439938] [2021-05-01 08:07:28,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:07:28,555 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-01 08:07:28,558 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:07:28,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:07:28,651 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:07:28,652 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:07:28,653 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:07:28,653 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 08:07:28,667 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:07:28,668 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-01 08:07:28,698 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:07:28,699 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:07:28,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:07:28,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:07:28,763 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:07:28,764 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:07:28,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 08:07:28,765 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:07:28,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369439938] [2021-05-01 08:07:28,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [369439938] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:07:28,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:07:28,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-01 08:07:28,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819477961] [2021-05-01 08:07:28,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-01 08:07:28,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:07:28,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-01 08:07:28,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-01 08:07:28,769 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-01 08:07:28,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:07:28,936 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2021-05-01 08:07:28,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-01 08:07:28,937 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-01 08:07:28,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:07:28,938 INFO L225 Difference]: With dead ends: 16 [2021-05-01 08:07:28,938 INFO L226 Difference]: Without dead ends: 13 [2021-05-01 08:07:28,939 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 175.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-01 08:07:28,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-05-01 08:07:28,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-05-01 08:07:28,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-01 08:07:28,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-05-01 08:07:28,944 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2021-05-01 08:07:28,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:07:28,944 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-05-01 08:07:28,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-01 08:07:28,945 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-05-01 08:07:28,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-01 08:07:28,945 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:07:28,945 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 08:07:28,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-01 08:07:28,945 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:07:28,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:07:28,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1837111337, now seen corresponding path program 2 times [2021-05-01 08:07:28,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:07:28,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1843626305] [2021-05-01 08:07:28,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:07:28,959 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2021-05-01 08:07:28,961 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:07:29,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-01 08:07:29,002 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-01 08:07:29,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-01 08:07:29,038 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-01 08:07:29,077 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-05-01 08:07:29,077 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-05-01 08:07:29,078 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-01 08:07:29,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 08:07:29 BoogieIcfgContainer [2021-05-01 08:07:29,092 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-01 08:07:29,094 INFO L168 Benchmark]: Toolchain (without parser) took 2021.76 ms. Allocated memory is still 198.2 MB. Free memory was 162.5 MB in the beginning and 147.1 MB in the end (delta: 15.3 MB). Peak memory consumption was 15.6 MB. Max. memory is 8.0 GB. [2021-05-01 08:07:29,095 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 198.2 MB. Free memory is still 179.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 08:07:29,097 INFO L168 Benchmark]: CACSL2BoogieTranslator took 354.38 ms. Allocated memory is still 198.2 MB. Free memory was 162.3 MB in the beginning and 181.1 MB in the end (delta: -18.8 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. [2021-05-01 08:07:29,098 INFO L168 Benchmark]: Boogie Preprocessor took 37.24 ms. Allocated memory is still 198.2 MB. Free memory was 181.1 MB in the beginning and 180.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-01 08:07:29,099 INFO L168 Benchmark]: RCFGBuilder took 418.43 ms. Allocated memory is still 198.2 MB. Free memory was 180.0 MB in the beginning and 166.9 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-01 08:07:29,102 INFO L168 Benchmark]: TraceAbstraction took 1201.57 ms. Allocated memory is still 198.2 MB. Free memory was 166.9 MB in the beginning and 147.1 MB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 8.0 GB. [2021-05-01 08:07:29,104 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 198.2 MB. Free memory is still 179.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 354.38 ms. Allocated memory is still 198.2 MB. Free memory was 162.3 MB in the beginning and 181.1 MB in the end (delta: -18.8 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.24 ms. Allocated memory is still 198.2 MB. Free memory was 181.1 MB in the beginning and 180.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 418.43 ms. Allocated memory is still 198.2 MB. Free memory was 180.0 MB in the beginning and 166.9 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1201.57 ms. Allocated memory is still 198.2 MB. Free memory was 166.9 MB in the beginning and 147.1 MB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L5] unsigned char n = __VERIFIER_nondet_uchar(); [L6] COND FALSE !(n == 0) [L9] unsigned char v = 0; [L10] unsigned char s = 0; [L11] unsigned int i = 0; [L12] COND TRUE i < n [L13] v = __VERIFIER_nondet_uchar() [L14] s += v [L15] ++i [L12] COND TRUE i < n [L13] v = __VERIFIER_nondet_uchar() [L14] s += v [L15] ++i [L12] COND FALSE !(i < n) [L17] COND TRUE s < v [L18] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1098.0ms, OverallIterations: 3, TraceHistogramMax: 2, EmptinessCheckTime: 19.2ms, AutomataDifference: 300.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 24 SDtfs, 17 SDslu, 19 SDs, 0 SdLazy, 29 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 88.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 272.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 31.5ms 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...