/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 02:21:04,094 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 02:21:04,096 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 02:21:04,130 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 02:21:04,143 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 02:21:04,144 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 02:21:04,146 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 02:21:04,147 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 02:21:04,148 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 02:21:04,149 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 02:21:04,159 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 02:21:04,161 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 02:21:04,163 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 02:21:04,164 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 02:21:04,166 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 02:21:04,167 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 02:21:04,170 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-22 02:21:04,180 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 02:21:04,181 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 02:21:04,182 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 02:21:04,183 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-22 02:21:04,195 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 02:21:04,196 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 02:21:04,197 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 02:21:04,198 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 02:21:04,198 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 02:21:04,198 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 02:21:04,199 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 02:21:04,199 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 02:21:04,199 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 02:21:04,199 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 02:21:04,200 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 02:21:04,200 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 02:21:04,200 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 02:21:04,201 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 02:21:04,201 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 02:21:04,201 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 02:21:04,202 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 02:21:04,202 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 02:21:04,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 02:21:04,202 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 02:21:04,203 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 02:21:04,203 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 02:21:04,203 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 02:21:04,203 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 02:21:04,579 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 02:21:04,606 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 02:21:04,610 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 02:21:04,611 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 02:21:04,612 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 02:21:04,613 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2021-02-22 02:21:04,691 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e47909aae/0ef8ad61407a49a39b9903501e67e6d2/FLAG2a416abad [2021-02-22 02:21:05,322 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 02:21:05,323 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2021-02-22 02:21:05,329 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e47909aae/0ef8ad61407a49a39b9903501e67e6d2/FLAG2a416abad [2021-02-22 02:21:05,689 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e47909aae/0ef8ad61407a49a39b9903501e67e6d2 [2021-02-22 02:21:05,692 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 02:21:05,706 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 02:21:05,707 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 02:21:05,708 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 02:21:05,714 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 02:21:05,715 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:21:05" (1/1) ... [2021-02-22 02:21:05,716 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45c3aaab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:05, skipping insertion in model container [2021-02-22 02:21:05,717 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:21:05" (1/1) ... [2021-02-22 02:21:05,725 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 02:21:05,743 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 02:21:05,886 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i[834,847] [2021-02-22 02:21:05,903 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:21:05,916 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 02:21:05,935 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i[834,847] [2021-02-22 02:21:05,942 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:21:05,962 INFO L208 MainTranslator]: Completed translation [2021-02-22 02:21:05,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:05 WrapperNode [2021-02-22 02:21:05,963 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 02:21:05,964 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 02:21:05,965 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 02:21:05,965 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 02:21:05,978 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:05" (1/1) ... [2021-02-22 02:21:05,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:05" (1/1) ... [2021-02-22 02:21:05,989 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:05" (1/1) ... [2021-02-22 02:21:05,993 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:05" (1/1) ... [2021-02-22 02:21:06,013 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:05" (1/1) ... [2021-02-22 02:21:06,019 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:05" (1/1) ... [2021-02-22 02:21:06,021 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:05" (1/1) ... [2021-02-22 02:21:06,030 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 02:21:06,033 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 02:21:06,034 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 02:21:06,034 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 02:21:06,035 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 02:21:06,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 02:21:06,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 02:21:06,140 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 02:21:06,140 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-22 02:21:06,141 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 02:21:06,141 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 02:21:06,141 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 02:21:06,141 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-22 02:21:06,142 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-22 02:21:06,142 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 02:21:06,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 02:21:06,143 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-22 02:21:06,143 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-02-22 02:21:06,143 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 02:21:06,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 02:21:06,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 02:21:06,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 02:21:06,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 02:21:06,145 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 02:21:06,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 02:21:06,541 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 02:21:06,542 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-22 02:21:06,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:21:06 BoogieIcfgContainer [2021-02-22 02:21:06,544 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 02:21:06,546 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 02:21:06,546 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 02:21:06,550 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 02:21:06,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 02:21:05" (1/3) ... [2021-02-22 02:21:06,551 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64d151e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:21:06, skipping insertion in model container [2021-02-22 02:21:06,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:05" (2/3) ... [2021-02-22 02:21:06,551 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64d151e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:21:06, skipping insertion in model container [2021-02-22 02:21:06,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:21:06" (3/3) ... [2021-02-22 02:21:06,590 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01_bug02_sum01_bug02_base.case.i [2021-02-22 02:21:06,600 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 02:21:06,604 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 02:21:06,624 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 02:21:06,650 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 02:21:06,650 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 02:21:06,650 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 02:21:06,650 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 02:21:06,650 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 02:21:06,650 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 02:21:06,651 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 02:21:06,651 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 02:21:06,666 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2021-02-22 02:21:06,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-22 02:21:06,676 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:21:06,677 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] [2021-02-22 02:21:06,678 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:21:06,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:21:06,685 INFO L82 PathProgramCache]: Analyzing trace with hash -143449552, now seen corresponding path program 1 times [2021-02-22 02:21:06,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:21:06,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1732138483] [2021-02-22 02:21:06,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:21:06,780 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:21:06,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:06,899 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:06,901 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:06,903 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:06,904 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:06,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:21:06,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:06,981 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:06,982 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:06,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:21:06,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1732138483] [2021-02-22 02:21:06,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:21:06,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-22 02:21:06,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785146154] [2021-02-22 02:21:06,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-22 02:21:06,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:21:07,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-22 02:21:07,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-22 02:21:07,019 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2021-02-22 02:21:07,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:21:07,124 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2021-02-22 02:21:07,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-22 02:21:07,127 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2021-02-22 02:21:07,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:21:07,138 INFO L225 Difference]: With dead ends: 46 [2021-02-22 02:21:07,138 INFO L226 Difference]: Without dead ends: 28 [2021-02-22 02:21:07,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-22 02:21:07,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-02-22 02:21:07,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-02-22 02:21:07,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-02-22 02:21:07,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-02-22 02:21:07,195 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 21 [2021-02-22 02:21:07,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:21:07,196 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-02-22 02:21:07,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-22 02:21:07,196 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-02-22 02:21:07,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-22 02:21:07,197 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:21:07,197 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] [2021-02-22 02:21:07,198 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 02:21:07,198 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:21:07,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:21:07,199 INFO L82 PathProgramCache]: Analyzing trace with hash -157302367, now seen corresponding path program 1 times [2021-02-22 02:21:07,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:21:07,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344410082] [2021-02-22 02:21:07,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:21:07,203 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:21:07,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:07,327 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:07,328 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:07,339 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:07,341 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-22 02:21:07,356 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:07,358 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:21:07,368 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:07,369 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:21:07,382 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:07,383 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:07,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:21:07,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:07,445 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:07,446 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:07,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:21:07,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344410082] [2021-02-22 02:21:07,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:21:07,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-22 02:21:07,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702471380] [2021-02-22 02:21:07,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-22 02:21:07,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:21:07,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-22 02:21:07,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-22 02:21:07,452 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 6 states. [2021-02-22 02:21:07,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:21:07,886 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2021-02-22 02:21:07,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-22 02:21:07,888 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2021-02-22 02:21:07,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:21:07,890 INFO L225 Difference]: With dead ends: 35 [2021-02-22 02:21:07,891 INFO L226 Difference]: Without dead ends: 30 [2021-02-22 02:21:07,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-02-22 02:21:07,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-02-22 02:21:07,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-02-22 02:21:07,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-02-22 02:21:07,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-02-22 02:21:07,922 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 21 [2021-02-22 02:21:07,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:21:07,923 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-02-22 02:21:07,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-22 02:21:07,927 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-02-22 02:21:07,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-22 02:21:07,929 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:21:07,930 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] [2021-02-22 02:21:07,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 02:21:07,934 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:21:07,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:21:07,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1837920541, now seen corresponding path program 1 times [2021-02-22 02:21:07,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:21:07,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512980466] [2021-02-22 02:21:07,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:21:07,972 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:08,000 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-22 02:21:08,015 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:08,023 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-22 02:21:08,041 WARN L141 QuantifierPusher]: treesize reduction 6, result has 76.0 percent of original size [2021-02-22 02:21:08,059 INFO L723 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2021-02-22 02:21:08,071 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:08,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:21:08,075 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:08,084 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-22 02:21:08,088 WARN L147 QuantifierPusher]: treesize reduction 6, result has 76.0 percent of original size 19 [2021-02-22 02:21:08,097 WARN L141 QuantifierPusher]: treesize reduction 8, result has 84.9 percent of original size [2021-02-22 02:21:08,107 WARN L147 QuantifierPusher]: treesize reduction 8, result has 84.9 percent of original size 45 [2021-02-22 02:21:08,113 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:08,118 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-22 02:21:08,120 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:08,126 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-22 02:21:08,143 WARN L141 QuantifierPusher]: treesize reduction 6, result has 76.0 percent of original size [2021-02-22 02:21:08,148 INFO L723 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2021-02-22 02:21:08,155 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:08,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:21:08,158 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:08,167 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-22 02:21:08,169 WARN L147 QuantifierPusher]: treesize reduction 6, result has 76.0 percent of original size 19 [2021-02-22 02:21:08,177 WARN L141 QuantifierPusher]: treesize reduction 8, result has 84.3 percent of original size [2021-02-22 02:21:08,183 WARN L147 QuantifierPusher]: treesize reduction 8, result has 84.3 percent of original size 43 [2021-02-22 02:21:08,184 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-22 02:21:08,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 02:21:08,261 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 02:21:08,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 02:21:08,297 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 02:21:08,322 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-22 02:21:08,322 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-22 02:21:08,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-22 02:21:08,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 02:21:08 BoogieIcfgContainer [2021-02-22 02:21:08,338 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-22 02:21:08,340 INFO L168 Benchmark]: Toolchain (without parser) took 2645.76 ms. Allocated memory was 152.0 MB in the beginning and 194.0 MB in the end (delta: 41.9 MB). Free memory was 127.6 MB in the beginning and 152.4 MB in the end (delta: -24.8 MB). Peak memory consumption was 17.3 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:08,341 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 152.0 MB. Free memory is still 125.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 02:21:08,341 INFO L168 Benchmark]: CACSL2BoogieTranslator took 256.11 ms. Allocated memory is still 152.0 MB. Free memory was 126.4 MB in the beginning and 116.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:08,342 INFO L168 Benchmark]: Boogie Preprocessor took 66.15 ms. Allocated memory is still 152.0 MB. Free memory was 116.9 MB in the beginning and 115.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:08,343 INFO L168 Benchmark]: RCFGBuilder took 510.76 ms. Allocated memory is still 152.0 MB. Free memory was 115.6 MB in the beginning and 101.2 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:08,344 INFO L168 Benchmark]: TraceAbstraction took 1792.60 ms. Allocated memory was 152.0 MB in the beginning and 194.0 MB in the end (delta: 41.9 MB). Free memory was 100.9 MB in the beginning and 152.4 MB in the end (delta: -51.5 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 02:21:08,347 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 152.0 MB. Free memory is still 125.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 256.11 ms. Allocated memory is still 152.0 MB. Free memory was 126.4 MB in the beginning and 116.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 66.15 ms. Allocated memory is still 152.0 MB. Free memory was 116.9 MB in the beginning and 115.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 510.76 ms. Allocated memory is still 152.0 MB. Free memory was 115.6 MB in the beginning and 101.2 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1792.60 ms. Allocated memory was 152.0 MB in the beginning and 194.0 MB in the end (delta: 41.9 MB). Free memory was 100.9 MB in the beginning and 152.4 MB in the end (delta: -51.5 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_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 FALSE !(i==4) [L24] i++ [L24] COND FALSE !(i<=n) [L28] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) [L15] COND TRUE !(cond) [L16] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.6s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 59 SDtfs, 42 SDslu, 42 SDs, 0 SdLazy, 68 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred 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, 2 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...