/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.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 18:48:10,649 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 18:48:10,652 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 18:48:10,688 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 18:48:10,702 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 18:48:10,703 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 18:48:10,705 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 18:48:10,724 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 18:48:10,726 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 18:48:10,727 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 18:48:10,729 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 18:48:10,732 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 18:48:10,734 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 18:48:10,736 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 18:48:10,737 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 18:48:10,738 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 18:48:10,742 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 18:48:10,754 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 18:48:10,755 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 18:48:10,757 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 18:48:10,759 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 18:48:10,774 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 18:48:10,774 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 18:48:10,776 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 18:48:10,776 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 18:48:10,777 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 18:48:10,777 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 18:48:10,777 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 18:48:10,777 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 18:48:10,778 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 18:48:10,778 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 18:48:10,778 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 18:48:10,779 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 18:48:10,779 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 18:48:10,779 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 18:48:10,779 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 18:48:10,780 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 18:48:10,780 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 18:48:10,780 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 18:48:10,781 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 18:48:10,781 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 18:48:10,781 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 18:48:10,781 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 18:48:10,782 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 18:48:11,162 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 18:48:11,204 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 18:48:11,208 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 18:48:11,210 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 18:48:11,211 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 18:48:11,212 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02.i [2021-02-23 18:48:11,319 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53760f753/c001572bb1a94875a38ec51367f45ac3/FLAG6f6187def [2021-02-23 18:48:11,996 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 18:48:11,997 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02.i [2021-02-23 18:48:12,006 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53760f753/c001572bb1a94875a38ec51367f45ac3/FLAG6f6187def [2021-02-23 18:48:12,376 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53760f753/c001572bb1a94875a38ec51367f45ac3 [2021-02-23 18:48:12,380 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 18:48:12,393 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 18:48:12,398 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 18:48:12,398 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 18:48:12,402 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 18:48:12,403 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:48:12" (1/1) ... [2021-02-23 18:48:12,405 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f1b9d51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:12, skipping insertion in model container [2021-02-23 18:48:12,405 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:48:12" (1/1) ... [2021-02-23 18:48:12,414 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 18:48:12,432 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 18:48:12,587 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] [2021-02-23 18:48:12,600 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:48:12,612 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 18:48:12,628 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] [2021-02-23 18:48:12,632 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:48:12,649 INFO L208 MainTranslator]: Completed translation [2021-02-23 18:48:12,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:12 WrapperNode [2021-02-23 18:48:12,650 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 18:48:12,652 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 18:48:12,652 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 18:48:12,652 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 18:48:12,665 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:12" (1/1) ... [2021-02-23 18:48:12,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:12" (1/1) ... [2021-02-23 18:48:12,673 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:12" (1/1) ... [2021-02-23 18:48:12,673 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:12" (1/1) ... [2021-02-23 18:48:12,678 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:12" (1/1) ... [2021-02-23 18:48:12,684 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:12" (1/1) ... [2021-02-23 18:48:12,685 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:12" (1/1) ... [2021-02-23 18:48:12,688 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 18:48:12,689 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 18:48:12,689 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 18:48:12,689 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 18:48:12,690 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:12" (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 [2021-02-23 18:48:12,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 18:48:12,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 18:48:12,804 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 18:48:12,804 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-23 18:48:12,804 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 18:48:12,804 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 18:48:12,805 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 18:48:12,805 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-23 18:48:12,805 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-23 18:48:12,806 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 18:48:12,806 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 18:48:12,807 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-23 18:48:12,807 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-02-23 18:48:12,807 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 18:48:12,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 18:48:12,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 18:48:12,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 18:48:12,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 18:48:12,811 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 18:48:12,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 18:48:13,207 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 18:48:13,207 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-23 18:48:13,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:48:13 BoogieIcfgContainer [2021-02-23 18:48:13,210 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 18:48:13,212 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 18:48:13,212 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 18:48:13,216 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 18:48:13,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 06:48:12" (1/3) ... [2021-02-23 18:48:13,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@740b1625 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:48:13, skipping insertion in model container [2021-02-23 18:48:13,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:12" (2/3) ... [2021-02-23 18:48:13,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@740b1625 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:48:13, skipping insertion in model container [2021-02-23 18:48:13,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:48:13" (3/3) ... [2021-02-23 18:48:13,221 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2021-02-23 18:48:13,229 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 18:48:13,235 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 18:48:13,260 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 18:48:13,297 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 18:48:13,300 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 18:48:13,300 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 18:48:13,301 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 18:48:13,301 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 18:48:13,301 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 18:48:13,301 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 18:48:13,301 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 18:48:13,344 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2021-02-23 18:48:13,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-23 18:48:13,364 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:48:13,368 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] [2021-02-23 18:48:13,369 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:48:13,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:48:13,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1758505504, now seen corresponding path program 1 times [2021-02-23 18:48:13,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:48:13,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133885159] [2021-02-23 18:48:13,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:48:13,535 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:48:13,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:48:13,802 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:13,804 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:13,815 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:13,817 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 18:48:13,836 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:13,837 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:48:13,844 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:13,845 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:48:13,853 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:13,854 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:13,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:48:13,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:48:13,908 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:13,910 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:13,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:48:13,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1133885159] [2021-02-23 18:48:13,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:48:13,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 18:48:13,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933069227] [2021-02-23 18:48:13,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 18:48:13,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:48:13,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 18:48:13,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 18:48:13,969 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 6 states. [2021-02-23 18:48:14,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:48:14,356 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2021-02-23 18:48:14,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-23 18:48:14,358 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2021-02-23 18:48:14,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:48:14,367 INFO L225 Difference]: With dead ends: 65 [2021-02-23 18:48:14,367 INFO L226 Difference]: Without dead ends: 40 [2021-02-23 18:48:14,371 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 [2021-02-23 18:48:14,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-02-23 18:48:14,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-02-23 18:48:14,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-02-23 18:48:14,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2021-02-23 18:48:14,428 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 22 [2021-02-23 18:48:14,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:48:14,429 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2021-02-23 18:48:14,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 18:48:14,429 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2021-02-23 18:48:14,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-23 18:48:14,431 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:48:14,431 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] [2021-02-23 18:48:14,431 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 18:48:14,432 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:48:14,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:48:14,433 INFO L82 PathProgramCache]: Analyzing trace with hash -878254983, now seen corresponding path program 1 times [2021-02-23 18:48:14,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:48:14,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1295419679] [2021-02-23 18:48:14,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:48:16,606 WARN L141 QuantifierPusher]: treesize reduction 88, result has 58.5 percent of original size [2021-02-23 18:48:16,646 WARN L147 QuantifierPusher]: treesize reduction 88, result has 58.5 percent of original size 124 [2021-02-23 18:48:16,649 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-02-23 18:48:16,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:48:16,835 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:16,837 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:16,838 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:16,840 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:48:16,849 WARN L141 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size [2021-02-23 18:48:16,850 WARN L147 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size 7 [2021-02-23 18:48:16,864 WARN L141 QuantifierPusher]: treesize reduction 24, result has 56.4 percent of original size [2021-02-23 18:48:16,867 WARN L147 QuantifierPusher]: treesize reduction 24, result has 56.4 percent of original size 31 [2021-02-23 18:48:16,899 WARN L141 QuantifierPusher]: treesize reduction 24, result has 48.9 percent of original size [2021-02-23 18:48:16,901 WARN L147 QuantifierPusher]: treesize reduction 24, result has 48.9 percent of original size 23 [2021-02-23 18:48:16,921 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:16,922 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:48:16,931 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:16,932 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:48:16,940 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:16,940 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:16,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:48:16,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:48:17,011 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:17,012 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:17,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:48:17,028 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:17,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:48:17,036 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:17,037 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 18:48:17,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:48:17,039 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:17,040 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-23 18:48:17,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:48:17,171 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:17,174 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-23 18:48:17,181 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 261 [2021-02-23 18:48:17,331 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 87 [2021-02-23 18:48:17,482 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:17,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:48:17,486 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:17,488 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-23 18:48:17,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:48:17,495 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:17,496 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 18:48:17,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:48:17,542 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:17,545 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-23 18:48:17,555 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 239 [2021-02-23 18:48:17,742 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 86 [2021-02-23 18:48:17,751 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:17,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:48:17,784 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:17,787 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-23 18:48:17,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:48:17,791 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:17,792 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-23 18:48:17,797 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 231 [2021-02-23 18:48:17,973 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 80 [2021-02-23 18:48:17,982 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:18,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:48:18,003 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:18,008 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-23 18:48:18,012 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 222 [2021-02-23 18:48:18,187 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:18,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:48:18,205 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:18,208 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-23 18:48:18,211 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 219 [2021-02-23 18:48:19,073 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:19,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:48:19,092 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:19,094 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-23 18:48:19,098 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 225 [2021-02-23 18:48:26,211 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:26,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:48:26,234 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:26,237 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-23 18:48:26,242 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 222 [2021-02-23 18:48:35,276 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:35,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:48:35,292 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:35,294 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-23 18:48:35,298 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-02-23 18:48:40,149 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:40,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:48:40,164 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:40,166 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-23 18:48:40,170 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 227 [2021-02-23 18:48:46,915 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:46,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:48:46,931 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:46,933 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-23 18:48:46,937 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 224 [2021-02-23 18:48:51,740 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:51,742 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:51,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1295419679] [2021-02-23 18:48:51,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:48:51,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-02-23 18:48:51,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475366051] [2021-02-23 18:48:51,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-23 18:48:51,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:48:51,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-23 18:48:51,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=273, Unknown=10, NotChecked=0, Total=342 [2021-02-23 18:48:51,747 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 17 states. [2021-02-23 18:48:52,577 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 35 [2021-02-23 18:49:24,334 WARN L202 SmtUtils]: Spent 22.83 s on a formula simplification. DAG size of input: 121 DAG size of output: 116 [2021-02-23 18:50:16,201 WARN L202 SmtUtils]: Spent 36.49 s on a formula simplification. DAG size of input: 121 DAG size of output: 119 [2021-02-23 18:50:30,533 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-02-23 18:50:39,724 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-02-23 18:50:57,786 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-02-23 18:51:13,917 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-02-23 18:51:21,913 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-02-23 18:51:28,765 WARN L202 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 107 [2021-02-23 18:51:45,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:51:45,981 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2021-02-23 18:51:45,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-23 18:51:45,982 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 31 [2021-02-23 18:51:45,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:51:45,986 INFO L225 Difference]: With dead ends: 62 [2021-02-23 18:51:45,986 INFO L226 Difference]: Without dead ends: 57 [2021-02-23 18:51:45,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 166.0s TimeCoverageRelationStatistics Valid=160, Invalid=859, Unknown=37, NotChecked=0, Total=1056 [2021-02-23 18:51:45,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-02-23 18:51:46,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2021-02-23 18:51:46,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-02-23 18:51:46,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2021-02-23 18:51:46,010 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 31 [2021-02-23 18:51:46,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:51:46,010 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2021-02-23 18:51:46,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-02-23 18:51:46,011 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2021-02-23 18:51:46,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-23 18:51:46,012 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:51:46,012 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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] [2021-02-23 18:51:46,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 18:51:46,013 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:51:46,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:51:46,013 INFO L82 PathProgramCache]: Analyzing trace with hash -2003708337, now seen corresponding path program 1 times [2021-02-23 18:51:46,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:51:46,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317598471] [2021-02-23 18:51:46,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:51:48,127 WARN L141 QuantifierPusher]: treesize reduction 88, result has 58.5 percent of original size [2021-02-23 18:51:48,137 WARN L147 QuantifierPusher]: treesize reduction 88, result has 58.5 percent of original size 124 [2021-02-23 18:51:50,231 WARN L141 QuantifierPusher]: treesize reduction 73, result has 56.8 percent of original size [2021-02-23 18:51:50,237 WARN L147 QuantifierPusher]: treesize reduction 73, result has 56.8 percent of original size 96 [2021-02-23 18:51:50,238 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-23 18:51:52,391 WARN L141 QuantifierPusher]: treesize reduction 85, result has 58.7 percent of original size [2021-02-23 18:51:52,399 WARN L147 QuantifierPusher]: treesize reduction 85, result has 58.7 percent of original size 121 [2021-02-23 18:51:52,400 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-23 18:51:52,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 18:51:52,452 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 18:51:52,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 18:51:52,492 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 18:51:52,543 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 18:51:52,543 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 18:51:52,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 18:51:52,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 06:51:52 BoogieIcfgContainer [2021-02-23 18:51:52,563 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 18:51:52,569 INFO L168 Benchmark]: Toolchain (without parser) took 220182.92 ms. Allocated memory was 152.0 MB in the beginning and 182.5 MB in the end (delta: 30.4 MB). Free memory was 129.4 MB in the beginning and 78.3 MB in the end (delta: 51.1 MB). Peak memory consumption was 82.2 MB. Max. memory is 8.0 GB. [2021-02-23 18:51:52,570 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 152.0 MB. Free memory is still 125.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 18:51:52,571 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.04 ms. Allocated memory is still 152.0 MB. Free memory was 128.2 MB in the beginning and 118.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 18:51:52,573 INFO L168 Benchmark]: Boogie Preprocessor took 36.42 ms. Allocated memory is still 152.0 MB. Free memory was 118.7 MB in the beginning and 117.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-23 18:51:52,579 INFO L168 Benchmark]: RCFGBuilder took 520.98 ms. Allocated memory is still 152.0 MB. Free memory was 117.3 MB in the beginning and 134.3 MB in the end (delta: -17.0 MB). Peak memory consumption was 16.3 MB. Max. memory is 8.0 GB. [2021-02-23 18:51:52,581 INFO L168 Benchmark]: TraceAbstraction took 219351.49 ms. Allocated memory was 152.0 MB in the beginning and 182.5 MB in the end (delta: 30.4 MB). Free memory was 133.9 MB in the beginning and 78.3 MB in the end (delta: 55.6 MB). Peak memory consumption was 85.8 MB. Max. memory is 8.0 GB. [2021-02-23 18:51:52,588 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 152.0 MB. Free memory is still 125.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 253.04 ms. Allocated memory is still 152.0 MB. Free memory was 128.2 MB in the beginning and 118.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.42 ms. Allocated memory is still 152.0 MB. Free memory was 118.7 MB in the beginning and 117.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 520.98 ms. Allocated memory is still 152.0 MB. Free memory was 117.3 MB in the beginning and 134.3 MB in the end (delta: -17.0 MB). Peak memory consumption was 16.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 219351.49 ms. Allocated memory was 152.0 MB in the beginning and 182.5 MB in the end (delta: 30.4 MB). Free memory was 133.9 MB in the beginning and 78.3 MB in the end (delta: 55.6 MB). Peak memory consumption was 85.8 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