/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.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 02:21:04,097 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 02:21:04,102 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 02:21:04,162 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 02:21:04,195 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 02:21:04,198 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 02:21:04,200 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 02:21:04,213 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 02:21:04,214 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 02:21:04,215 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 02:21:04,217 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 02:21:04,220 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 02:21:04,222 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 02:21:04,223 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 02:21:04,225 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 02:21:04,226 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 02:21:04,229 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-22 02:21:04,239 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 02:21:04,241 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 02:21:04,242 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 02:21:04,245 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 02:21:04,258 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 02:21:04,259 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 02:21:04,260 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 02:21:04,261 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 02:21:04,261 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 02:21:04,261 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 02:21:04,261 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 02:21:04,261 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 02:21:04,262 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 02:21:04,262 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 02:21:04,262 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 02:21:04,262 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 02:21:04,263 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 02:21:04,263 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 02:21:04,263 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 02:21:04,263 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 02:21:04,264 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 02:21:04,264 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 02:21:04,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 02:21:04,264 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 02:21:04,265 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 02:21:04,265 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 02:21:04,265 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 02:21:04,265 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 02:21:04,660 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 02:21:04,689 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 02:21:04,692 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 02:21:04,694 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 02:21:04,694 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 02:21:04,696 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02.i [2021-02-22 02:21:04,770 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49d0d5643/ed686d5248684a5f8bc5d443f3ef6c5a/FLAGde9600acb [2021-02-22 02:21:05,360 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 02:21:05,360 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02.i [2021-02-22 02:21:05,368 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49d0d5643/ed686d5248684a5f8bc5d443f3ef6c5a/FLAGde9600acb [2021-02-22 02:21:05,744 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49d0d5643/ed686d5248684a5f8bc5d443f3ef6c5a [2021-02-22 02:21:05,748 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 02:21:05,764 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 02:21:05,766 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 02:21:05,767 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 02:21:05,771 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 02:21:05,772 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:21:05" (1/1) ... [2021-02-22 02:21:05,774 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@526d9df6 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 02:21:05,774 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:21:05" (1/1) ... [2021-02-22 02:21:05,785 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 02:21:05,806 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 02:21:06,038 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.i[812,825] [2021-02-22 02:21:06,062 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:21:06,074 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 02:21:06,092 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.i[812,825] [2021-02-22 02:21:06,097 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:21:06,118 INFO L208 MainTranslator]: Completed translation [2021-02-22 02:21:06,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:06 WrapperNode [2021-02-22 02:21:06,119 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 02:21:06,122 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 02:21:06,123 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 02:21:06,123 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 02:21:06,136 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:06" (1/1) ... [2021-02-22 02:21:06,136 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:06" (1/1) ... [2021-02-22 02:21:06,145 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:06" (1/1) ... [2021-02-22 02:21:06,145 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:06" (1/1) ... [2021-02-22 02:21:06,162 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:06" (1/1) ... [2021-02-22 02:21:06,168 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:06" (1/1) ... [2021-02-22 02:21:06,172 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:06" (1/1) ... [2021-02-22 02:21:06,180 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 02:21:06,182 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 02:21:06,183 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 02:21:06,183 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 02:21:06,184 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:06" (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 02:21:06,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 02:21:06,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 02:21:06,297 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 02:21:06,297 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-22 02:21:06,297 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 02:21:06,298 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 02:21:06,298 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 02:21:06,298 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-22 02:21:06,298 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-22 02:21:06,298 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 02:21:06,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 02:21:06,299 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-22 02:21:06,299 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-02-22 02:21:06,299 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 02:21:06,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 02:21:06,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 02:21:06,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 02:21:06,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 02:21:06,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 02:21:06,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 02:21:06,695 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 02:21:06,696 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-22 02:21:06,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:21:06 BoogieIcfgContainer [2021-02-22 02:21:06,699 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 02:21:06,702 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 02:21:06,702 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 02:21:06,707 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 02:21:06,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 02:21:05" (1/3) ... [2021-02-22 02:21:06,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bee0c56 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 02:21:06,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:06" (2/3) ... [2021-02-22 02:21:06,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bee0c56 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 02:21:06,710 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 02:21:06,712 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2021-02-22 02:21:06,719 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 02:21:06,724 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 02:21:06,746 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 02:21:06,785 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 02:21:06,785 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 02:21:06,786 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 02:21:06,786 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 02:21:06,786 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 02:21:06,786 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 02:21:06,787 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 02:21:06,787 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 02:21:06,812 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2021-02-22 02:21:06,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-22 02:21:06,823 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:21:06,824 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] [2021-02-22 02:21:06,824 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:21:06,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:21:06,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1758505504, now seen corresponding path program 1 times [2021-02-22 02:21:06,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:21:06,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717446076] [2021-02-22 02:21:06,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:21:06,934 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:21:07,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:07,125 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:07,127 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:07,139 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:07,142 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-22 02:21:07,171 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:07,172 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:21:07,179 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:07,180 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:21:07,195 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:07,196 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:07,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:21:07,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:07,244 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:07,245 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:07,256 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 02:21:07,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717446076] [2021-02-22 02:21:07,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:21:07,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-22 02:21:07,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776894757] [2021-02-22 02:21:07,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-22 02:21:07,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:21:07,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-22 02:21:07,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-22 02:21:07,289 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 6 states. [2021-02-22 02:21:07,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:21:07,707 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2021-02-22 02:21:07,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-22 02:21:07,711 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2021-02-22 02:21:07,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:21:07,723 INFO L225 Difference]: With dead ends: 65 [2021-02-22 02:21:07,723 INFO L226 Difference]: Without dead ends: 40 [2021-02-22 02:21:07,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-22 02:21:07,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-02-22 02:21:07,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-02-22 02:21:07,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-02-22 02:21:07,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2021-02-22 02:21:07,816 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 22 [2021-02-22 02:21:07,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:21:07,817 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2021-02-22 02:21:07,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-22 02:21:07,817 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2021-02-22 02:21:07,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-22 02:21:07,820 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:21:07,820 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, 1] [2021-02-22 02:21:07,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 02:21:07,821 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:21:07,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:21:07,822 INFO L82 PathProgramCache]: Analyzing trace with hash -878254983, now seen corresponding path program 1 times [2021-02-22 02:21:07,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:21:07,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [175314973] [2021-02-22 02:21:07,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:21:07,868 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:07,884 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-22 02:21:07,891 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:07,895 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-22 02:21:07,907 WARN L141 QuantifierPusher]: treesize reduction 8, result has 72.4 percent of original size [2021-02-22 02:21:07,922 INFO L723 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2021-02-22 02:21:07,929 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:07,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:21:07,933 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:07,946 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-22 02:21:07,951 WARN L147 QuantifierPusher]: treesize reduction 8, result has 72.4 percent of original size 21 [2021-02-22 02:21:07,962 WARN L141 QuantifierPusher]: treesize reduction 12, result has 83.3 percent of original size [2021-02-22 02:21:07,969 WARN L147 QuantifierPusher]: treesize reduction 12, result has 83.3 percent of original size 60 [2021-02-22 02:21:07,972 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-02-22 02:21:08,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 02:21:08,072 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 02:21:08,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 02:21:08,107 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 02:21:08,137 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-22 02:21:08,137 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-22 02:21:08,138 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-22 02:21:08,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 02:21:08 BoogieIcfgContainer [2021-02-22 02:21:08,153 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-22 02:21:08,155 INFO L168 Benchmark]: Toolchain (without parser) took 2403.46 ms. Allocated memory is still 151.0 MB. Free memory was 127.6 MB in the beginning and 103.6 MB in the end (delta: 24.1 MB). Peak memory consumption was 25.2 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:08,156 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 124.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 02:21:08,157 INFO L168 Benchmark]: CACSL2BoogieTranslator took 352.66 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 117.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:08,157 INFO L168 Benchmark]: Boogie Preprocessor took 58.27 ms. Allocated memory is still 151.0 MB. Free memory was 117.0 MB in the beginning and 115.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:08,158 INFO L168 Benchmark]: RCFGBuilder took 517.03 ms. Allocated memory is still 151.0 MB. Free memory was 115.5 MB in the beginning and 131.9 MB in the end (delta: -16.4 MB). Peak memory consumption was 15.8 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:08,159 INFO L168 Benchmark]: TraceAbstraction took 1451.96 ms. Allocated memory is still 151.0 MB. Free memory was 131.9 MB in the beginning and 103.6 MB in the end (delta: 28.3 MB). Peak memory consumption was 29.4 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:08,162 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 124.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 352.66 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 117.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 58.27 ms. Allocated memory is still 151.0 MB. Free memory was 117.0 MB in the beginning and 115.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 517.03 ms. Allocated memory is still 151.0 MB. Free memory was 115.5 MB in the beginning and 131.9 MB in the end (delta: -16.4 MB). Peak memory consumption was 15.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1451.96 ms. Allocated memory is still 151.0 MB. Free memory was 131.9 MB in the beginning and 103.6 MB in the end (delta: 28.3 MB). Peak memory consumption was 29.4 MB. 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, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L23] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L24] i=1 [L24] COND TRUE i<=n [L25] COND TRUE i