/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-b7b32d2 [2021-02-21 21:17:41,384 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 21:17:41,387 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 21:17:41,426 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-21 21:17:41,440 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 21:17:41,441 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 21:17:41,443 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 21:17:41,444 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 21:17:41,445 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 21:17:41,457 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 21:17:41,473 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 21:17:41,476 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 21:17:41,482 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 21:17:41,484 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 21:17:41,486 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 21:17:41,488 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 21:17:41,496 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 21:17:41,514 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 21:17:41,515 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 21:17:41,516 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 21:17:41,517 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-21 21:17:41,539 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 21:17:41,539 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 21:17:41,545 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 21:17:41,545 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 21:17:41,545 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 21:17:41,545 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 21:17:41,546 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 21:17:41,546 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 21:17:41,546 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 21:17:41,546 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 21:17:41,548 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 21:17:41,548 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 21:17:41,548 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 21:17:41,548 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 21:17:41,549 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 21:17:41,549 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 21:17:41,549 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 21:17:41,549 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 21:17:41,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 21:17:41,550 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 21:17:41,550 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 21:17:41,550 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 21:17:41,550 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 21:17:41,965 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 21:17:41,995 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 21:17:41,999 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 21:17:42,000 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 21:17:42,002 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 21:17:42,003 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02.i [2021-02-21 21:17:42,097 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45f4ef6b1/2e0c7e62f41e46ee9616d28f892bdf64/FLAG7b886626a [2021-02-21 21:17:42,656 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 21:17:42,656 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02.i [2021-02-21 21:17:42,668 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45f4ef6b1/2e0c7e62f41e46ee9616d28f892bdf64/FLAG7b886626a [2021-02-21 21:17:43,045 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45f4ef6b1/2e0c7e62f41e46ee9616d28f892bdf64 [2021-02-21 21:17:43,048 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 21:17:43,064 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 21:17:43,067 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 21:17:43,067 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 21:17:43,071 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 21:17:43,072 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:17:43" (1/1) ... [2021-02-21 21:17:43,074 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ee56dd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:43, skipping insertion in model container [2021-02-21 21:17:43,074 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:17:43" (1/1) ... [2021-02-21 21:17:43,085 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 21:17:43,105 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 21:17:43,283 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] [2021-02-21 21:17:43,295 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:17:43,305 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 21:17:43,320 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] [2021-02-21 21:17:43,324 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:17:43,340 INFO L208 MainTranslator]: Completed translation [2021-02-21 21:17:43,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:43 WrapperNode [2021-02-21 21:17:43,341 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 21:17:43,342 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 21:17:43,342 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 21:17:43,342 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 21:17:43,355 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:43" (1/1) ... [2021-02-21 21:17:43,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:43" (1/1) ... [2021-02-21 21:17:43,364 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:43" (1/1) ... [2021-02-21 21:17:43,364 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:43" (1/1) ... [2021-02-21 21:17:43,371 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:43" (1/1) ... [2021-02-21 21:17:43,375 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:43" (1/1) ... [2021-02-21 21:17:43,377 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:43" (1/1) ... [2021-02-21 21:17:43,379 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 21:17:43,380 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 21:17:43,380 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 21:17:43,381 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 21:17:43,382 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:43" (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 [2021-02-21 21:17:43,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 21:17:43,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 21:17:43,471 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 21:17:43,471 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-21 21:17:43,471 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 21:17:43,471 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 21:17:43,472 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 21:17:43,472 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-21 21:17:43,472 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-21 21:17:43,472 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 21:17:43,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 21:17:43,472 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-21 21:17:43,473 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-02-21 21:17:43,473 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 21:17:43,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 21:17:43,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 21:17:43,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 21:17:43,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 21:17:43,474 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 21:17:43,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 21:17:43,818 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 21:17:43,818 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-21 21:17:43,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:17:43 BoogieIcfgContainer [2021-02-21 21:17:43,822 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 21:17:43,851 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 21:17:43,852 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 21:17:43,855 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 21:17:43,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 09:17:43" (1/3) ... [2021-02-21 21:17:43,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c698c9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:17:43, skipping insertion in model container [2021-02-21 21:17:43,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:43" (2/3) ... [2021-02-21 21:17:43,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c698c9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:17:43, skipping insertion in model container [2021-02-21 21:17:43,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:17:43" (3/3) ... [2021-02-21 21:17:43,866 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2021-02-21 21:17:43,890 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 21:17:43,899 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 21:17:43,952 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 21:17:44,012 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 21:17:44,013 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 21:17:44,013 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 21:17:44,013 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 21:17:44,013 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 21:17:44,013 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 21:17:44,013 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 21:17:44,013 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 21:17:44,030 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2021-02-21 21:17:44,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-21 21:17:44,040 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:17:44,041 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] [2021-02-21 21:17:44,044 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:17:44,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:17:44,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1758505504, now seen corresponding path program 1 times [2021-02-21 21:17:44,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:17:44,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144249588] [2021-02-21 21:17:44,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:17:44,150 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:17:44,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:44,372 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:44,373 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:44,383 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:44,385 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 21:17:44,408 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:44,409 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:17:44,419 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:44,420 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:17:44,433 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:44,434 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:44,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:17:44,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:44,543 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:44,544 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:44,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:17:44,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144249588] [2021-02-21 21:17:44,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:17:44,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 21:17:44,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280159083] [2021-02-21 21:17:44,570 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 21:17:44,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:17:44,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 21:17:44,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-21 21:17:44,600 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 6 states. [2021-02-21 21:17:44,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:17:44,937 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2021-02-21 21:17:44,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-21 21:17:44,939 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2021-02-21 21:17:44,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:17:44,950 INFO L225 Difference]: With dead ends: 65 [2021-02-21 21:17:44,951 INFO L226 Difference]: Without dead ends: 40 [2021-02-21 21:17:44,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-21 21:17:44,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-02-21 21:17:45,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-02-21 21:17:45,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-02-21 21:17:45,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2021-02-21 21:17:45,023 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 22 [2021-02-21 21:17:45,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:17:45,024 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2021-02-21 21:17:45,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 21:17:45,024 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2021-02-21 21:17:45,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-21 21:17:45,026 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:17:45,026 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] [2021-02-21 21:17:45,026 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 21:17:45,027 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:17:45,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:17:45,028 INFO L82 PathProgramCache]: Analyzing trace with hash -878254983, now seen corresponding path program 1 times [2021-02-21 21:17:45,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:17:45,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072132545] [2021-02-21 21:17:45,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:17:47,259 WARN L141 QuantifierPusher]: treesize reduction 88, result has 58.5 percent of original size [2021-02-21 21:17:47,296 WARN L147 QuantifierPusher]: treesize reduction 88, result has 58.5 percent of original size 124 [2021-02-21 21:17:47,298 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-02-21 21:17:47,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:47,407 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:47,408 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:47,408 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:47,409 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:47,413 WARN L141 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size [2021-02-21 21:17:47,414 WARN L147 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size 7 [2021-02-21 21:17:47,425 WARN L141 QuantifierPusher]: treesize reduction 24, result has 56.4 percent of original size [2021-02-21 21:17:47,427 WARN L147 QuantifierPusher]: treesize reduction 24, result has 56.4 percent of original size 31 [2021-02-21 21:17:47,446 WARN L141 QuantifierPusher]: treesize reduction 24, result has 48.9 percent of original size [2021-02-21 21:17:47,448 WARN L147 QuantifierPusher]: treesize reduction 24, result has 48.9 percent of original size 23 [2021-02-21 21:17:47,463 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:47,464 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:17:47,476 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:47,476 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:17:47,483 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:47,484 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:47,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:17:47,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:47,515 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:47,516 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:47,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:17:47,528 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:47,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:17:47,536 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:47,537 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:17:47,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:17:47,541 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:47,543 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-21 21:17:47,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:17:47,716 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:47,719 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-21 21:17:47,726 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 261 [2021-02-21 21:17:47,870 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 87 [2021-02-21 21:17:48,005 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:48,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:17:48,007 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:48,008 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-21 21:17:48,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:17:48,010 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:48,011 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:17:48,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:17:48,037 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:48,040 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-21 21:17:48,045 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 239 [2021-02-21 21:17:48,232 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 86 [2021-02-21 21:17:48,242 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:48,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:17:48,276 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:48,283 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-21 21:17:48,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:17:48,286 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:48,287 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-21 21:17:48,292 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 231 [2021-02-21 21:17:48,463 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 80 [2021-02-21 21:17:48,473 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:48,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:17:48,500 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:48,502 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-21 21:17:48,505 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 222 [2021-02-21 21:17:48,623 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:48,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:17:48,639 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:48,641 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-21 21:17:48,644 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 219 [2021-02-21 21:17:48,763 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:48,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:17:48,780 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:48,782 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-21 21:17:48,785 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 225 [2021-02-21 21:17:49,443 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:49,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:17:49,466 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:49,468 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-21 21:17:49,472 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 222 [2021-02-21 21:18:01,443 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:01,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:18:01,457 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:01,460 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-21 21:18:01,474 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-02-21 21:18:08,567 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:08,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:18:08,584 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:08,587 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-21 21:18:08,591 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 227 [2021-02-21 21:18:15,010 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:15,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:18:15,025 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:15,027 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-21 21:18:15,030 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 224 [2021-02-21 21:18:19,784 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:19,786 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:19,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072132545] [2021-02-21 21:18:19,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:18:19,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-02-21 21:18:19,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322573665] [2021-02-21 21:18:19,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-21 21:18:19,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:18:19,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-21 21:18:19,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=274, Unknown=9, NotChecked=0, Total=342 [2021-02-21 21:18:19,790 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 17 states. [2021-02-21 21:18:20,517 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 35 [2021-02-21 21:18:45,240 WARN L202 SmtUtils]: Spent 24.58 s on a formula simplification. DAG size of input: 121 DAG size of output: 116 [2021-02-21 21:19:26,202 WARN L202 SmtUtils]: Spent 34.45 s on a formula simplification. DAG size of input: 121 DAG size of output: 119 [2021-02-21 21:19:37,630 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-02-21 21:19:39,657 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-02-21 21:19:46,710 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-02-21 21:19:52,215 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-02-21 21:19:56,841 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-02-21 21:20:01,630 WARN L202 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 107 [2021-02-21 21:20:16,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:20:16,486 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2021-02-21 21:20:16,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-21 21:20:16,487 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 31 [2021-02-21 21:20:16,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:20:16,489 INFO L225 Difference]: With dead ends: 62 [2021-02-21 21:20:16,489 INFO L226 Difference]: Without dead ends: 57 [2021-02-21 21:20:16,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 108.0s TimeCoverageRelationStatistics Valid=161, Invalid=880, Unknown=15, NotChecked=0, Total=1056 [2021-02-21 21:20:16,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-02-21 21:20:16,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2021-02-21 21:20:16,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-02-21 21:20:16,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2021-02-21 21:20:16,510 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 31 [2021-02-21 21:20:16,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:20:16,510 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2021-02-21 21:20:16,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-02-21 21:20:16,511 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2021-02-21 21:20:16,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-21 21:20:16,512 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:20:16,512 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] [2021-02-21 21:20:16,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 21:20:16,513 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:20:16,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:20:16,513 INFO L82 PathProgramCache]: Analyzing trace with hash -2003708337, now seen corresponding path program 1 times [2021-02-21 21:20:16,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:20:16,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976684095] [2021-02-21 21:20:16,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:20:18,637 WARN L141 QuantifierPusher]: treesize reduction 88, result has 58.5 percent of original size [2021-02-21 21:20:18,647 WARN L147 QuantifierPusher]: treesize reduction 88, result has 58.5 percent of original size 124 [2021-02-21 21:20:20,735 WARN L141 QuantifierPusher]: treesize reduction 73, result has 56.8 percent of original size [2021-02-21 21:20:20,740 WARN L147 QuantifierPusher]: treesize reduction 73, result has 56.8 percent of original size 96 [2021-02-21 21:20:20,741 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-21 21:20:22,839 WARN L141 QuantifierPusher]: treesize reduction 85, result has 58.7 percent of original size [2021-02-21 21:20:22,850 WARN L147 QuantifierPusher]: treesize reduction 85, result has 58.7 percent of original size 121 [2021-02-21 21:20:22,854 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-21 21:20:22,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 21:20:22,973 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 21:20:23,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 21:20:23,046 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 21:20:23,076 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-21 21:20:23,077 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 21:20:23,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 21:20:23,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 09:20:23 BoogieIcfgContainer [2021-02-21 21:20:23,093 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 21:20:23,095 INFO L168 Benchmark]: Toolchain (without parser) took 160042.01 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 127.6 MB in the beginning and 124.3 MB in the end (delta: 3.3 MB). Peak memory consumption was 34.6 MB. Max. memory is 8.0 GB. [2021-02-21 21:20:23,096 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 125.2 MB in the end (delta: 118.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 21:20:23,096 INFO L168 Benchmark]: CACSL2BoogieTranslator took 274.54 ms. Allocated memory is still 151.0 MB. Free memory was 126.4 MB in the beginning and 117.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-21 21:20:23,097 INFO L168 Benchmark]: Boogie Preprocessor took 37.39 ms. Allocated memory is still 151.0 MB. Free memory was 117.1 MB in the beginning and 115.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-21 21:20:23,098 INFO L168 Benchmark]: RCFGBuilder took 442.45 ms. Allocated memory is still 151.0 MB. Free memory was 115.5 MB in the beginning and 133.6 MB in the end (delta: -18.1 MB). Peak memory consumption was 18.5 MB. Max. memory is 8.0 GB. [2021-02-21 21:20:23,099 INFO L168 Benchmark]: TraceAbstraction took 159241.92 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 133.1 MB in the beginning and 124.3 MB in the end (delta: 8.8 MB). Peak memory consumption was 39.2 MB. Max. memory is 8.0 GB. [2021-02-21 21:20:23,107 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 125.2 MB in the end (delta: 118.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 274.54 ms. Allocated memory is still 151.0 MB. Free memory was 126.4 MB in the beginning and 117.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.39 ms. Allocated memory is still 151.0 MB. Free memory was 117.1 MB in the beginning and 115.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 442.45 ms. Allocated memory is still 151.0 MB. Free memory was 115.5 MB in the beginning and 133.6 MB in the end (delta: -18.1 MB). Peak memory consumption was 18.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 159241.92 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 133.1 MB in the beginning and 124.3 MB in the end (delta: 8.8 MB). Peak memory consumption was 39.2 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