/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/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 21:46:08,739 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 21:46:08,742 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 21:46:08,794 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 21:46:08,795 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 21:46:08,800 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 21:46:08,803 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 21:46:08,811 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 21:46:08,815 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 21:46:08,821 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 21:46:08,822 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 21:46:08,824 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 21:46:08,824 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 21:46:08,827 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 21:46:08,830 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 21:46:08,832 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 21:46:08,833 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 21:46:08,836 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 21:46:08,843 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 21:46:08,851 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 21:46:08,853 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 21:46:08,856 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 21:46:08,861 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 21:46:08,864 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 21:46:08,882 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 21:46:08,894 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 21:46:08,895 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 21:46:08,895 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 21:46:08,896 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 21:46:08,919 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 21:46:08,920 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 21:46:08,925 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 21:46:08,926 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 21:46:08,926 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 21:46:08,926 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 21:46:08,926 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 21:46:08,926 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 21:46:08,927 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 21:46:08,927 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 21:46:08,928 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 21:46:08,928 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 21:46:08,929 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 21:46:08,929 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 21:46:08,929 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 21:46:08,929 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 21:46:08,930 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 21:46:08,930 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 21:46:08,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 21:46:08,930 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 21:46:08,930 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 21:46:08,931 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 21:46:08,931 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 21:46:09,349 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 21:46:09,375 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 21:46:09,378 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 21:46:09,380 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 21:46:09,381 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 21:46:09,382 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2020-10-23 21:46:09,472 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75d31892d/466785582dd54e7aa760673edc83ce25/FLAG8a3219a73 [2020-10-23 21:46:10,080 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 21:46:10,081 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2020-10-23 21:46:10,089 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75d31892d/466785582dd54e7aa760673edc83ce25/FLAG8a3219a73 [2020-10-23 21:46:10,445 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75d31892d/466785582dd54e7aa760673edc83ce25 [2020-10-23 21:46:10,448 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 21:46:10,455 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 21:46:10,461 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 21:46:10,462 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 21:46:10,466 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 21:46:10,467 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:46:10" (1/1) ... [2020-10-23 21:46:10,471 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@383ca202 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:46:10, skipping insertion in model container [2020-10-23 21:46:10,471 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:46:10" (1/1) ... [2020-10-23 21:46:10,480 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 21:46:10,499 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 21:46:10,672 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 21:46:10,683 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 21:46:10,699 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 21:46:10,713 INFO L208 MainTranslator]: Completed translation [2020-10-23 21:46:10,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:46:10 WrapperNode [2020-10-23 21:46:10,714 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 21:46:10,715 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 21:46:10,716 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 21:46:10,716 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 21:46:10,728 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:46:10" (1/1) ... [2020-10-23 21:46:10,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:46:10" (1/1) ... [2020-10-23 21:46:10,735 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:46:10" (1/1) ... [2020-10-23 21:46:10,735 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:46:10" (1/1) ... [2020-10-23 21:46:10,740 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:46:10" (1/1) ... [2020-10-23 21:46:10,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:46:10" (1/1) ... [2020-10-23 21:46:10,746 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:46:10" (1/1) ... [2020-10-23 21:46:10,748 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 21:46:10,749 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 21:46:10,749 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 21:46:10,749 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 21:46:10,750 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:46:10" (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 [2020-10-23 21:46:10,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 21:46:10,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 21:46:10,828 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 21:46:10,828 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 21:46:10,829 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 21:46:10,829 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 21:46:10,829 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 21:46:10,830 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-23 21:46:10,830 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-23 21:46:10,830 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 21:46:10,831 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 21:46:10,831 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 21:46:10,831 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-23 21:46:10,831 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 21:46:10,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 21:46:10,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 21:46:10,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 21:46:10,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 21:46:10,834 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 21:46:10,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 21:46:11,104 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 21:46:11,104 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 21:46:11,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:46:11 BoogieIcfgContainer [2020-10-23 21:46:11,106 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 21:46:11,109 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 21:46:11,109 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 21:46:11,121 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 21:46:11,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 09:46:10" (1/3) ... [2020-10-23 21:46:11,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f17dae4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:46:11, skipping insertion in model container [2020-10-23 21:46:11,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:46:10" (2/3) ... [2020-10-23 21:46:11,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f17dae4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:46:11, skipping insertion in model container [2020-10-23 21:46:11,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:46:11" (3/3) ... [2020-10-23 21:46:11,135 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01_bug02_sum01_bug02_base.case.i [2020-10-23 21:46:11,169 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 21:46:11,178 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 21:46:11,214 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 21:46:11,275 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 21:46:11,276 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 21:46:11,276 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 21:46:11,276 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 21:46:11,276 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 21:46:11,276 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 21:46:11,276 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 21:46:11,277 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 21:46:11,296 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-10-23 21:46:11,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-23 21:46:11,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:46:11,307 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] [2020-10-23 21:46:11,308 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:46:11,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:46:11,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1111598142, now seen corresponding path program 1 times [2020-10-23 21:46:11,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:46:11,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [990298301] [2020-10-23 21:46:11,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:46:11,435 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:46:11,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:11,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:46:11,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:11,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:46:11,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [990298301] [2020-10-23 21:46:11,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:46:11,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 21:46:11,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944193628] [2020-10-23 21:46:11,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 21:46:11,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:46:11,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 21:46:11,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 21:46:11,647 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 3 states. [2020-10-23 21:46:11,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:46:11,737 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2020-10-23 21:46:11,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 21:46:11,739 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-10-23 21:46:11,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:46:11,747 INFO L225 Difference]: With dead ends: 53 [2020-10-23 21:46:11,747 INFO L226 Difference]: Without dead ends: 30 [2020-10-23 21:46:11,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 21:46:11,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-23 21:46:11,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-23 21:46:11,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-23 21:46:11,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-10-23 21:46:11,803 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 23 [2020-10-23 21:46:11,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:46:11,803 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-10-23 21:46:11,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 21:46:11,804 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-10-23 21:46:11,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-23 21:46:11,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:46:11,805 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] [2020-10-23 21:46:11,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 21:46:11,806 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:46:11,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:46:11,807 INFO L82 PathProgramCache]: Analyzing trace with hash 683944815, now seen corresponding path program 1 times [2020-10-23 21:46:11,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:46:11,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [510136823] [2020-10-23 21:46:11,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:46:11,811 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:46:11,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:11,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:46:11,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:11,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:46:11,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [510136823] [2020-10-23 21:46:11,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:46:11,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 21:46:11,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658912088] [2020-10-23 21:46:11,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 21:46:11,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:46:11,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 21:46:11,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 21:46:11,941 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 6 states. [2020-10-23 21:46:12,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:46:12,187 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2020-10-23 21:46:12,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 21:46:12,187 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-23 21:46:12,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:46:12,189 INFO L225 Difference]: With dead ends: 39 [2020-10-23 21:46:12,189 INFO L226 Difference]: Without dead ends: 32 [2020-10-23 21:46:12,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-23 21:46:12,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-23 21:46:12,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-23 21:46:12,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-23 21:46:12,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-10-23 21:46:12,204 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 23 [2020-10-23 21:46:12,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:46:12,204 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-10-23 21:46:12,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 21:46:12,204 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-10-23 21:46:12,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-23 21:46:12,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:46:12,206 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:46:12,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 21:46:12,206 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:46:12,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:46:12,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1464441781, now seen corresponding path program 1 times [2020-10-23 21:46:12,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:46:12,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [414668260] [2020-10-23 21:46:12,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:46:14,908 INFO L309 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-10-23 21:46:15,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:15,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:46:15,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:15,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:46:15,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [414668260] [2020-10-23 21:46:15,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:46:15,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-23 21:46:15,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812719729] [2020-10-23 21:46:15,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-23 21:46:15,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:46:15,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-23 21:46:15,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-23 21:46:15,595 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 13 states. [2020-10-23 21:46:16,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:46:16,633 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2020-10-23 21:46:16,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-23 21:46:16,634 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-10-23 21:46:16,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:46:16,636 INFO L225 Difference]: With dead ends: 47 [2020-10-23 21:46:16,636 INFO L226 Difference]: Without dead ends: 40 [2020-10-23 21:46:16,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2020-10-23 21:46:16,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-23 21:46:16,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2020-10-23 21:46:16,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-23 21:46:16,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-10-23 21:46:16,648 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2020-10-23 21:46:16,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:46:16,648 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-10-23 21:46:16,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-23 21:46:16,649 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-10-23 21:46:16,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-23 21:46:16,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:46:16,650 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:46:16,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 21:46:16,650 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:46:16,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:46:16,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1527114563, now seen corresponding path program 1 times [2020-10-23 21:46:16,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:46:16,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679599880] [2020-10-23 21:46:16,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:46:16,736 INFO L309 leratedInterpolation]: Starting analysis with loop acceleration approximation PRECISE [2020-10-23 21:46:16,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 21:46:16,774 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 21:46:16,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 21:46:16,815 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 21:46:16,857 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-23 21:46:16,857 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 21:46:16,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 21:46:16,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 09:46:16 BoogieIcfgContainer [2020-10-23 21:46:16,876 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 21:46:16,878 INFO L168 Benchmark]: Toolchain (without parser) took 6426.21 ms. Allocated memory was 157.3 MB in the beginning and 194.0 MB in the end (delta: 36.7 MB). Free memory was 132.8 MB in the beginning and 125.6 MB in the end (delta: 7.2 MB). Peak memory consumption was 44.7 MB. Max. memory is 8.0 GB. [2020-10-23 21:46:16,879 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 157.3 MB. Free memory was 131.9 MB in the beginning and 131.8 MB in the end (delta: 95.5 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 21:46:16,880 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.00 ms. Allocated memory is still 157.3 MB. Free memory was 132.2 MB in the beginning and 123.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 21:46:16,881 INFO L168 Benchmark]: Boogie Preprocessor took 33.10 ms. Allocated memory is still 157.3 MB. Free memory was 123.0 MB in the beginning and 121.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 21:46:16,882 INFO L168 Benchmark]: RCFGBuilder took 357.39 ms. Allocated memory is still 157.3 MB. Free memory was 121.5 MB in the beginning and 107.2 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2020-10-23 21:46:16,883 INFO L168 Benchmark]: TraceAbstraction took 5766.56 ms. Allocated memory was 157.3 MB in the beginning and 194.0 MB in the end (delta: 36.7 MB). Free memory was 106.7 MB in the beginning and 125.6 MB in the end (delta: -18.9 MB). Peak memory consumption was 18.5 MB. Max. memory is 8.0 GB. [2020-10-23 21:46:16,886 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 157.3 MB. Free memory was 131.9 MB in the beginning and 131.8 MB in the end (delta: 95.5 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 253.00 ms. Allocated memory is still 157.3 MB. Free memory was 132.2 MB in the beginning and 123.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.10 ms. Allocated memory is still 157.3 MB. Free memory was 123.0 MB in the beginning and 121.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 357.39 ms. Allocated memory is still 157.3 MB. Free memory was 121.5 MB in the beginning and 107.2 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5766.56 ms. Allocated memory was 157.3 MB in the beginning and 194.0 MB in the end (delta: 36.7 MB). Free memory was 106.7 MB in the beginning and 125.6 MB in the end (delta: -18.9 MB). Peak memory consumption was 18.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L24] i=1 [L24] COND TRUE i<=n [L25] sn = sn + (2) [L26] COND TRUE i==4 [L26] sn=-10 [L24] i++ [L24] COND FALSE !(i<=n) [L28] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) [L15] COND TRUE !(cond) [L16] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "sum01_bug02_sum01_bug02_base.case.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.5s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 92 SDtfs, 86 SDslu, 138 SDs, 0 SdLazy, 261 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred 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, 3 MinimizatonAttempts, 7 StatesRemovedByMinimization, 2 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...