/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_b3_o2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 04:13:15,217 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 04:13:15,221 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 04:13:15,281 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 04:13:15,316 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 04:13:15,319 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 04:13:15,321 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 04:13:15,323 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 04:13:15,327 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 04:13:15,329 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 04:13:15,338 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 04:13:15,347 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 04:13:15,349 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 04:13:15,351 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 04:13:15,353 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 04:13:15,356 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 04:13:15,366 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 04:13:15,380 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-24 04:13:15,382 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-24 04:13:15,383 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-24 04:13:15,390 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-24 04:13:15,416 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 04:13:15,416 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 04:13:15,421 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 04:13:15,422 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 04:13:15,422 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 04:13:15,422 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 04:13:15,422 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 04:13:15,423 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 04:13:15,423 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 04:13:15,423 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 04:13:15,424 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 04:13:15,425 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 04:13:15,425 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 04:13:15,426 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 04:13:15,426 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 04:13:15,427 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 04:13:15,427 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 04:13:15,427 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 04:13:15,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 04:13:15,428 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 04:13:15,428 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 04:13:15,429 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 04:13:15,429 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-24 04:13:15,429 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-24 04:13:15,869 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 04:13:15,905 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 04:13:15,908 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 04:13:15,910 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 04:13:15,911 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 04:13:15,912 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_b3_o2-2.c [2021-02-24 04:13:16,036 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7aa5d8bc4/b0f73ab82a474ee1a413a42a640ee54e/FLAG249a312e1 [2021-02-24 04:13:16,587 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 04:13:16,588 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_b3_o2-2.c [2021-02-24 04:13:16,595 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7aa5d8bc4/b0f73ab82a474ee1a413a42a640ee54e/FLAG249a312e1 [2021-02-24 04:13:16,973 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7aa5d8bc4/b0f73ab82a474ee1a413a42a640ee54e [2021-02-24 04:13:16,976 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 04:13:16,991 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 04:13:16,993 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 04:13:16,993 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 04:13:16,997 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 04:13:16,998 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:13:16" (1/1) ... [2021-02-24 04:13:16,999 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cd02391 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:13:16, skipping insertion in model container [2021-02-24 04:13:17,000 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:13:16" (1/1) ... [2021-02-24 04:13:17,009 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 04:13:17,023 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 04:13:17,196 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_b3_o2-2.c[528,541] [2021-02-24 04:13:17,200 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:13:17,211 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 04:13:17,227 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_b3_o2-2.c[528,541] [2021-02-24 04:13:17,228 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:13:17,247 INFO L208 MainTranslator]: Completed translation [2021-02-24 04:13:17,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:13:17 WrapperNode [2021-02-24 04:13:17,248 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 04:13:17,249 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 04:13:17,249 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 04:13:17,249 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 04:13:17,265 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:13:17" (1/1) ... [2021-02-24 04:13:17,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:13:17" (1/1) ... [2021-02-24 04:13:17,275 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:13:17" (1/1) ... [2021-02-24 04:13:17,275 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:13:17" (1/1) ... [2021-02-24 04:13:17,286 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:13:17" (1/1) ... [2021-02-24 04:13:17,288 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:13:17" (1/1) ... [2021-02-24 04:13:17,290 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:13:17" (1/1) ... [2021-02-24 04:13:17,292 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 04:13:17,293 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 04:13:17,294 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 04:13:17,294 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 04:13:17,295 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:13:17" (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 [2021-02-24 04:13:17,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 04:13:17,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 04:13:17,396 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 04:13:17,396 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2021-02-24 04:13:17,396 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 04:13:17,396 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 04:13:17,397 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 04:13:17,398 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 04:13:17,398 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 04:13:17,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 04:13:17,399 INFO L130 BoogieDeclarations]: Found specification of procedure id [2021-02-24 04:13:17,399 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 04:13:17,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 04:13:17,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 04:13:17,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 04:13:17,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 04:13:17,402 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 04:13:17,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 04:13:17,714 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 04:13:17,715 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-24 04:13:17,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:13:17 BoogieIcfgContainer [2021-02-24 04:13:17,717 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 04:13:17,719 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 04:13:17,719 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 04:13:17,723 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 04:13:17,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:13:16" (1/3) ... [2021-02-24 04:13:17,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ea25d29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:13:17, skipping insertion in model container [2021-02-24 04:13:17,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:13:17" (2/3) ... [2021-02-24 04:13:17,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ea25d29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:13:17, skipping insertion in model container [2021-02-24 04:13:17,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:13:17" (3/3) ... [2021-02-24 04:13:17,728 INFO L111 eAbstractionObserver]: Analyzing ICFG id_b3_o2-2.c [2021-02-24 04:13:17,736 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 04:13:17,741 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 04:13:17,764 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 04:13:17,795 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 04:13:17,796 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 04:13:17,796 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-24 04:13:17,796 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 04:13:17,796 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 04:13:17,796 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 04:13:17,797 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 04:13:17,797 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 04:13:17,818 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2021-02-24 04:13:17,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-24 04:13:17,832 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:13:17,834 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] [2021-02-24 04:13:17,834 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:13:17,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:13:17,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1860388581, now seen corresponding path program 1 times [2021-02-24 04:13:17,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:13:17,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438270314] [2021-02-24 04:13:17,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:13:18,050 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:13:18,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:13:18,311 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:18,314 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:18,315 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:18,318 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:13:18,336 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:18,337 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:13:18,358 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:18,359 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:18,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:13:18,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:13:18,456 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:18,458 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:18,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-24 04:13:18,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:13:18,477 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:18,480 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:18,481 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:18,481 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:13:18,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:13:18,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438270314] [2021-02-24 04:13:18,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:13:18,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-24 04:13:18,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382570195] [2021-02-24 04:13:18,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-24 04:13:18,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:13:18,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-24 04:13:18,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-24 04:13:18,537 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 6 states. [2021-02-24 04:13:18,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:13:18,853 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2021-02-24 04:13:18,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-24 04:13:18,855 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2021-02-24 04:13:18,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:13:18,865 INFO L225 Difference]: With dead ends: 53 [2021-02-24 04:13:18,865 INFO L226 Difference]: Without dead ends: 36 [2021-02-24 04:13:18,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-24 04:13:18,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-02-24 04:13:18,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-02-24 04:13:18,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-02-24 04:13:18,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-02-24 04:13:18,932 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 26 [2021-02-24 04:13:18,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:13:18,932 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-02-24 04:13:18,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-24 04:13:18,933 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-02-24 04:13:18,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-24 04:13:18,935 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:13:18,935 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:13:18,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 04:13:18,936 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:13:18,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:13:18,937 INFO L82 PathProgramCache]: Analyzing trace with hash -558808662, now seen corresponding path program 1 times [2021-02-24 04:13:18,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:13:18,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [896580188] [2021-02-24 04:13:18,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:13:18,941 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:13:18,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:13:18,990 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:18,991 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:18,992 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:18,992 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:19,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:13:19,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:13:19,026 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:19,027 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:19,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-24 04:13:19,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:13:19,057 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:19,058 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:19,059 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:19,060 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:13:19,064 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:19,065 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:13:19,071 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:19,071 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:19,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-24 04:13:19,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:13:19,082 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:19,083 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:19,084 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:19,084 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:13:19,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-24 04:13:19,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [896580188] [2021-02-24 04:13:19,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:13:19,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-24 04:13:19,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187724840] [2021-02-24 04:13:19,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-24 04:13:19,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:13:19,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-24 04:13:19,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-24 04:13:19,098 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 6 states. [2021-02-24 04:13:19,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:13:19,337 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2021-02-24 04:13:19,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-24 04:13:19,338 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2021-02-24 04:13:19,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:13:19,340 INFO L225 Difference]: With dead ends: 57 [2021-02-24 04:13:19,340 INFO L226 Difference]: Without dead ends: 43 [2021-02-24 04:13:19,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-24 04:13:19,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-02-24 04:13:19,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-02-24 04:13:19,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-02-24 04:13:19,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-02-24 04:13:19,357 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 36 [2021-02-24 04:13:19,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:13:19,358 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-02-24 04:13:19,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-24 04:13:19,358 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-02-24 04:13:19,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-24 04:13:19,360 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:13:19,360 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:13:19,361 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 04:13:19,361 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:13:19,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:13:19,362 INFO L82 PathProgramCache]: Analyzing trace with hash -688096918, now seen corresponding path program 1 times [2021-02-24 04:13:19,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:13:19,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247825372] [2021-02-24 04:13:19,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:13:19,365 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:13:19,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:13:19,405 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:19,406 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:19,407 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:19,408 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:13:19,411 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:19,412 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:13:19,416 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:19,416 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:19,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:13:19,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:13:19,449 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:19,449 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:19,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-24 04:13:19,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:13:19,472 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:19,473 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:19,474 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:19,475 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:13:19,481 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:19,481 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:13:19,489 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:19,489 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:13:19,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-24 04:13:19,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:13:19,506 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:19,507 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:19,507 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:19,508 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:13:19,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-24 04:13:19,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247825372] [2021-02-24 04:13:19,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:13:19,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-24 04:13:19,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452062246] [2021-02-24 04:13:19,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-24 04:13:19,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:13:19,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-24 04:13:19,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-02-24 04:13:19,522 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 9 states. [2021-02-24 04:13:19,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:13:19,859 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2021-02-24 04:13:19,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-24 04:13:19,859 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2021-02-24 04:13:19,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:13:19,861 INFO L225 Difference]: With dead ends: 49 [2021-02-24 04:13:19,861 INFO L226 Difference]: Without dead ends: 43 [2021-02-24 04:13:19,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-02-24 04:13:19,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-02-24 04:13:19,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-02-24 04:13:19,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-02-24 04:13:19,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2021-02-24 04:13:19,875 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 36 [2021-02-24 04:13:19,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:13:19,876 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2021-02-24 04:13:19,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-24 04:13:19,876 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2021-02-24 04:13:19,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-02-24 04:13:19,878 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:13:19,878 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1] [2021-02-24 04:13:19,878 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-24 04:13:19,878 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:13:19,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:13:19,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1524591493, now seen corresponding path program 1 times [2021-02-24 04:13:19,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:13:19,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1791541554] [2021-02-24 04:13:19,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:13:19,882 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:13:19,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:13:19,915 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:19,916 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:19,917 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:19,917 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:13:19,920 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:19,921 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:13:19,925 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:19,925 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:19,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:13:19,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:13:19,959 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:19,960 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:19,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-24 04:13:19,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:13:19,976 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:19,977 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:19,978 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:19,978 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:13:19,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-24 04:13:19,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:13:19,991 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:19,992 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:19,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-24 04:13:19,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:13:19,997 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:19,997 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:20,001 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-24 04:13:20,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1791541554] [2021-02-24 04:13:20,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:13:20,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-24 04:13:20,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038727179] [2021-02-24 04:13:20,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-24 04:13:20,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:13:20,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-24 04:13:20,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-24 04:13:20,005 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 6 states. [2021-02-24 04:13:20,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:13:20,208 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2021-02-24 04:13:20,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-24 04:13:20,208 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2021-02-24 04:13:20,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:13:20,213 INFO L225 Difference]: With dead ends: 51 [2021-02-24 04:13:20,213 INFO L226 Difference]: Without dead ends: 45 [2021-02-24 04:13:20,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-24 04:13:20,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-02-24 04:13:20,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2021-02-24 04:13:20,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-02-24 04:13:20,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2021-02-24 04:13:20,238 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 46 [2021-02-24 04:13:20,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:13:20,240 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2021-02-24 04:13:20,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-24 04:13:20,240 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2021-02-24 04:13:20,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-02-24 04:13:20,248 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:13:20,249 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 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] [2021-02-24 04:13:20,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-24 04:13:20,249 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:13:20,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:13:20,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1653879749, now seen corresponding path program 2 times [2021-02-24 04:13:20,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:13:20,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55370213] [2021-02-24 04:13:20,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:13:20,254 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:13:20,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 04:13:20,324 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 04:13:20,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 04:13:20,371 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 04:13:20,404 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-24 04:13:20,404 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 04:13:20,405 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-24 04:13:20,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 04:13:20 BoogieIcfgContainer [2021-02-24 04:13:20,425 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 04:13:20,427 INFO L168 Benchmark]: Toolchain (without parser) took 3448.62 ms. Allocated memory was 161.5 MB in the beginning and 195.0 MB in the end (delta: 33.6 MB). Free memory was 137.8 MB in the beginning and 82.1 MB in the end (delta: 55.7 MB). Peak memory consumption was 90.1 MB. Max. memory is 8.0 GB. [2021-02-24 04:13:20,428 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 125.8 MB. Free memory is still 82.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 04:13:20,428 INFO L168 Benchmark]: CACSL2BoogieTranslator took 255.04 ms. Allocated memory is still 161.5 MB. Free memory was 136.7 MB in the beginning and 127.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-24 04:13:20,429 INFO L168 Benchmark]: Boogie Preprocessor took 43.49 ms. Allocated memory is still 161.5 MB. Free memory was 127.4 MB in the beginning and 126.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-24 04:13:20,430 INFO L168 Benchmark]: RCFGBuilder took 423.84 ms. Allocated memory is still 161.5 MB. Free memory was 126.0 MB in the beginning and 137.3 MB in the end (delta: -11.2 MB). Peak memory consumption was 11.0 MB. Max. memory is 8.0 GB. [2021-02-24 04:13:20,431 INFO L168 Benchmark]: TraceAbstraction took 2706.08 ms. Allocated memory was 161.5 MB in the beginning and 195.0 MB in the end (delta: 33.6 MB). Free memory was 136.9 MB in the beginning and 82.1 MB in the end (delta: 54.8 MB). Peak memory consumption was 89.6 MB. Max. memory is 8.0 GB. [2021-02-24 04:13:20,435 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 125.8 MB. Free memory is still 82.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 255.04 ms. Allocated memory is still 161.5 MB. Free memory was 136.7 MB in the beginning and 127.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 43.49 ms. Allocated memory is still 161.5 MB. Free memory was 127.4 MB in the beginning and 126.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 423.84 ms. Allocated memory is still 161.5 MB. Free memory was 126.0 MB in the beginning and 137.3 MB in the end (delta: -11.2 MB). Peak memory consumption was 11.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2706.08 ms. Allocated memory was 161.5 MB in the beginning and 195.0 MB in the end (delta: 33.6 MB). Free memory was 136.9 MB in the beginning and 82.1 MB in the end (delta: 54.8 MB). Peak memory consumption was 89.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] int input = __VERIFIER_nondet_int(); [L15] CALL, EXPR id(input) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id((unsigned int)x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id((unsigned int)x-1) [L7] COND TRUE x==0 [L7] return 0; [L8] RET, EXPR id((unsigned int)x-1) [L8] int ret = id((unsigned int)x-1) + 1; [L9] COND FALSE !(ret > 3) [L10] return ret; [L8] RET, EXPR id((unsigned int)x-1) [L8] int ret = id((unsigned int)x-1) + 1; [L9] COND FALSE !(ret > 3) [L10] return ret; [L15] RET, EXPR id(input) [L15] int result = id(input); [L16] COND TRUE result == 2 [L17] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.6s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 128 SDtfs, 120 SDslu, 215 SDs, 0 SdLazy, 382 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 5 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...