/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/recursive/gcd01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 20:12:14,140 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 20:12:14,143 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 20:12:14,179 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-21 20:12:14,214 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 20:12:14,219 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 20:12:14,221 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 20:12:14,232 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 20:12:14,234 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 20:12:14,237 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 20:12:14,241 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 20:12:14,247 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 20:12:14,251 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 20:12:14,252 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 20:12:14,253 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 20:12:14,254 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 20:12:14,257 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 20:12:14,267 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 20:12:14,268 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 20:12:14,268 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 20:12:14,273 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 20:12:14,291 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 20:12:14,292 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 20:12:14,297 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 20:12:14,297 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 20:12:14,297 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 20:12:14,297 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 20:12:14,297 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 20:12:14,298 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 20:12:14,298 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 20:12:14,298 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 20:12:14,299 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 20:12:14,299 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 20:12:14,300 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 20:12:14,300 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 20:12:14,300 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 20:12:14,300 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 20:12:14,301 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 20:12:14,301 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 20:12:14,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 20:12:14,301 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 20:12:14,301 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 20:12:14,302 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 20:12:14,302 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 20:12:14,730 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 20:12:14,760 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 20:12:14,764 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 20:12:14,765 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 20:12:14,766 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 20:12:14,767 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/gcd01-1.c [2021-02-21 20:12:14,851 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6d3f9531/7d14582c8d1041a6969430683e63e030/FLAG7f170bc4f [2021-02-21 20:12:15,347 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 20:12:15,347 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/gcd01-1.c [2021-02-21 20:12:15,367 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6d3f9531/7d14582c8d1041a6969430683e63e030/FLAG7f170bc4f [2021-02-21 20:12:15,736 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6d3f9531/7d14582c8d1041a6969430683e63e030 [2021-02-21 20:12:15,739 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 20:12:15,755 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 20:12:15,759 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 20:12:15,759 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 20:12:15,764 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 20:12:15,764 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:12:15" (1/1) ... [2021-02-21 20:12:15,766 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d39cbe1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:12:15, skipping insertion in model container [2021-02-21 20:12:15,767 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:12:15" (1/1) ... [2021-02-21 20:12:15,776 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 20:12:15,797 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 20:12:15,999 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/gcd01-1.c[1008,1021] [2021-02-21 20:12:16,003 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:12:16,013 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 20:12:16,032 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/gcd01-1.c[1008,1021] [2021-02-21 20:12:16,033 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:12:16,049 INFO L208 MainTranslator]: Completed translation [2021-02-21 20:12:16,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:12:16 WrapperNode [2021-02-21 20:12:16,050 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 20:12:16,051 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 20:12:16,051 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 20:12:16,051 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 20:12:16,065 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:12:16" (1/1) ... [2021-02-21 20:12:16,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:12:16" (1/1) ... [2021-02-21 20:12:16,073 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:12:16" (1/1) ... [2021-02-21 20:12:16,073 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:12:16" (1/1) ... [2021-02-21 20:12:16,079 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:12:16" (1/1) ... [2021-02-21 20:12:16,081 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:12:16" (1/1) ... [2021-02-21 20:12:16,082 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:12:16" (1/1) ... [2021-02-21 20:12:16,085 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 20:12:16,086 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 20:12:16,086 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 20:12:16,086 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 20:12:16,087 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:12:16" (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 20:12:16,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 20:12:16,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 20:12:16,219 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 20:12:16,220 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2021-02-21 20:12:16,220 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 20:12:16,220 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 20:12:16,220 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 20:12:16,220 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 20:12:16,221 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 20:12:16,221 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 20:12:16,221 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2021-02-21 20:12:16,221 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 20:12:16,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 20:12:16,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 20:12:16,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 20:12:16,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 20:12:16,222 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 20:12:16,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 20:12:16,494 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 20:12:16,494 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-21 20:12:16,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:12:16 BoogieIcfgContainer [2021-02-21 20:12:16,497 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 20:12:16,498 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 20:12:16,499 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 20:12:16,503 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 20:12:16,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 08:12:15" (1/3) ... [2021-02-21 20:12:16,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d8795ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:12:16, skipping insertion in model container [2021-02-21 20:12:16,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:12:16" (2/3) ... [2021-02-21 20:12:16,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d8795ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:12:16, skipping insertion in model container [2021-02-21 20:12:16,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:12:16" (3/3) ... [2021-02-21 20:12:16,507 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd01-1.c [2021-02-21 20:12:16,514 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 20:12:16,519 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 20:12:16,551 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 20:12:16,603 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 20:12:16,604 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 20:12:16,604 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 20:12:16,604 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 20:12:16,604 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 20:12:16,604 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 20:12:16,605 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 20:12:16,605 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 20:12:16,643 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states. [2021-02-21 20:12:16,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-21 20:12:16,670 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:12:16,671 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, 1] [2021-02-21 20:12:16,671 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:12:16,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:12:16,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1211389042, now seen corresponding path program 1 times [2021-02-21 20:12:16,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:12:16,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [459390254] [2021-02-21 20:12:16,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:12:16,829 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:12:16,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:12:17,010 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:17,012 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:12:17,013 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:17,014 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:12:17,037 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:17,038 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:12:17,049 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:17,050 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:12:17,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:12:17,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:12:17,128 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:17,130 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:12:17,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-21 20:12:17,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:12:17,189 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:17,192 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:12:17,206 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:17,209 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:12:17,231 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:17,232 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:12:17,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:12:17,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [459390254] [2021-02-21 20:12:17,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:12:17,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-21 20:12:17,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075726732] [2021-02-21 20:12:17,271 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-21 20:12:17,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:12:17,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-21 20:12:17,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-21 20:12:17,296 INFO L87 Difference]: Start difference. First operand 52 states. Second operand 8 states. [2021-02-21 20:12:17,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:12:17,789 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2021-02-21 20:12:17,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-21 20:12:17,791 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2021-02-21 20:12:17,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:12:17,802 INFO L225 Difference]: With dead ends: 69 [2021-02-21 20:12:17,802 INFO L226 Difference]: Without dead ends: 46 [2021-02-21 20:12:17,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-02-21 20:12:17,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-02-21 20:12:17,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-02-21 20:12:17,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-02-21 20:12:17,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-02-21 20:12:17,863 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 32 [2021-02-21 20:12:17,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:12:17,863 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-02-21 20:12:17,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-21 20:12:17,864 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-02-21 20:12:17,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-21 20:12:17,866 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:12:17,867 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, 1, 1] [2021-02-21 20:12:17,867 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 20:12:17,867 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:12:17,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:12:17,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1584443520, now seen corresponding path program 1 times [2021-02-21 20:12:17,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:12:17,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [778931886] [2021-02-21 20:12:17,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:12:17,872 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:12:17,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:12:17,951 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:17,953 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:12:17,954 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:17,954 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:12:17,958 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:17,958 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:12:17,966 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:17,966 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:12:17,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:12:18,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:12:18,035 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:18,036 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:12:18,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-21 20:12:18,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:12:18,062 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:18,064 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:12:18,066 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:18,066 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:12:18,074 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:18,074 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:12:18,087 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 20:12:18,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [778931886] [2021-02-21 20:12:18,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:12:18,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-21 20:12:18,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111034673] [2021-02-21 20:12:18,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-21 20:12:18,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:12:18,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-21 20:12:18,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-21 20:12:18,095 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 7 states. [2021-02-21 20:12:18,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:12:18,420 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2021-02-21 20:12:18,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-21 20:12:18,421 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2021-02-21 20:12:18,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:12:18,423 INFO L225 Difference]: With dead ends: 54 [2021-02-21 20:12:18,423 INFO L226 Difference]: Without dead ends: 48 [2021-02-21 20:12:18,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-02-21 20:12:18,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-02-21 20:12:18,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-02-21 20:12:18,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-02-21 20:12:18,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-02-21 20:12:18,442 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 33 [2021-02-21 20:12:18,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:12:18,443 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-02-21 20:12:18,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-21 20:12:18,443 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-02-21 20:12:18,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-02-21 20:12:18,445 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:12:18,445 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:12:18,446 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 20:12:18,446 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:12:18,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:12:18,447 INFO L82 PathProgramCache]: Analyzing trace with hash -207814176, now seen corresponding path program 1 times [2021-02-21 20:12:18,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:12:18,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420679786] [2021-02-21 20:12:18,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:12:18,450 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:12:18,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:12:18,486 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:18,486 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:12:18,487 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:18,487 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:12:18,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:12:18,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:12:18,520 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:18,521 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:12:18,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-21 20:12:18,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:12:18,535 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:18,535 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:12:18,536 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:18,537 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:12:18,542 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:18,543 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 20:12:18,551 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:18,551 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:12:18,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-02-21 20:12:18,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:12:18,563 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:18,564 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:12:18,570 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:18,571 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:12:18,580 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:18,581 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:12:18,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-21 20:12:18,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420679786] [2021-02-21 20:12:18,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:12:18,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-21 20:12:18,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432364677] [2021-02-21 20:12:18,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-21 20:12:18,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:12:18,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-21 20:12:18,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-21 20:12:18,597 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 8 states. [2021-02-21 20:12:18,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:12:18,923 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2021-02-21 20:12:18,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-21 20:12:18,924 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2021-02-21 20:12:18,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:12:18,926 INFO L225 Difference]: With dead ends: 64 [2021-02-21 20:12:18,926 INFO L226 Difference]: Without dead ends: 50 [2021-02-21 20:12:18,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-02-21 20:12:18,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-02-21 20:12:18,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2021-02-21 20:12:18,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-02-21 20:12:18,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2021-02-21 20:12:18,945 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 43 [2021-02-21 20:12:18,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:12:18,945 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2021-02-21 20:12:18,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-21 20:12:18,946 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2021-02-21 20:12:18,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-02-21 20:12:18,947 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:12:18,948 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:12:18,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 20:12:18,948 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:12:18,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:12:18,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1203687162, now seen corresponding path program 1 times [2021-02-21 20:12:18,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:12:18,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835664585] [2021-02-21 20:12:18,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:12:18,952 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:12:18,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:12:18,983 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:18,984 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:12:18,984 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:18,985 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:12:19,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:12:19,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:12:19,010 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:19,010 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:12:19,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-21 20:12:19,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:12:19,024 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:19,024 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:12:19,025 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:19,026 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:12:19,031 WARN L141 QuantifierPusher]: treesize reduction 9, result has 47.1 percent of original size [2021-02-21 20:12:19,032 WARN L147 QuantifierPusher]: treesize reduction 9, result has 47.1 percent of original size 8 [2021-02-21 20:12:19,039 WARN L141 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-02-21 20:12:19,040 WARN L147 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size 7 [2021-02-21 20:12:19,048 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:19,049 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:12:19,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-02-21 20:12:19,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:12:19,060 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:19,061 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:12:19,067 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:19,067 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:12:19,076 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:19,077 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:12:19,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-21 20:12:19,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835664585] [2021-02-21 20:12:19,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:12:19,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-21 20:12:19,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518202532] [2021-02-21 20:12:19,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-21 20:12:19,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:12:19,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-21 20:12:19,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-02-21 20:12:19,092 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 9 states. [2021-02-21 20:12:19,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:12:19,384 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2021-02-21 20:12:19,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-21 20:12:19,385 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2021-02-21 20:12:19,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:12:19,387 INFO L225 Difference]: With dead ends: 64 [2021-02-21 20:12:19,387 INFO L226 Difference]: Without dead ends: 47 [2021-02-21 20:12:19,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-02-21 20:12:19,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-02-21 20:12:19,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2021-02-21 20:12:19,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-02-21 20:12:19,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-02-21 20:12:19,421 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 43 [2021-02-21 20:12:19,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:12:19,421 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-02-21 20:12:19,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-21 20:12:19,421 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-02-21 20:12:19,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-21 20:12:19,427 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:12:19,427 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:12:19,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 20:12:19,428 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:12:19,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:12:19,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1175923098, now seen corresponding path program 1 times [2021-02-21 20:12:19,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:12:19,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925531743] [2021-02-21 20:12:19,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:12:19,434 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:12:19,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:12:19,494 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:19,495 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:12:19,496 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:19,496 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:12:19,499 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:19,500 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:12:19,505 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:19,506 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:12:19,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:12:19,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:12:19,530 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:19,532 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:12:19,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-21 20:12:19,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:12:19,543 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:19,543 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:12:19,544 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:19,545 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:12:19,555 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:19,555 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:12:19,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-02-21 20:12:19,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:12:19,568 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:19,568 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:12:19,569 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:19,569 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:12:19,580 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:19,580 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:12:19,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-21 20:12:19,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925531743] [2021-02-21 20:12:19,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:12:19,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-21 20:12:19,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743809510] [2021-02-21 20:12:19,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-21 20:12:19,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:12:19,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-21 20:12:19,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-02-21 20:12:19,587 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 8 states. [2021-02-21 20:12:19,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:12:19,952 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2021-02-21 20:12:19,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-21 20:12:19,952 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2021-02-21 20:12:19,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:12:19,954 INFO L225 Difference]: With dead ends: 56 [2021-02-21 20:12:19,954 INFO L226 Difference]: Without dead ends: 50 [2021-02-21 20:12:19,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-02-21 20:12:19,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-02-21 20:12:19,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2021-02-21 20:12:19,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-02-21 20:12:19,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2021-02-21 20:12:19,971 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 44 [2021-02-21 20:12:19,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:12:19,971 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2021-02-21 20:12:19,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-21 20:12:19,972 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2021-02-21 20:12:19,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-21 20:12:19,973 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:12:19,974 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:12:19,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 20:12:19,974 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:12:19,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:12:19,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1350337254, now seen corresponding path program 1 times [2021-02-21 20:12:19,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:12:19,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395344396] [2021-02-21 20:12:19,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:12:19,977 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:12:19,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:12:20,020 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:20,022 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:12:20,025 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:20,026 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:12:20,030 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:20,031 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:12:20,036 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:20,037 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:12:20,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:12:20,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:12:20,072 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:20,072 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:12:20,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-21 20:12:20,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:12:20,092 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:20,097 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:12:20,098 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:20,099 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:12:20,104 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:20,105 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:12:20,111 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:20,111 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:12:20,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-02-21 20:12:20,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:12:20,139 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:20,140 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:12:20,140 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:20,141 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:12:20,141 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:20,146 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:12:20,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-21 20:12:20,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395344396] [2021-02-21 20:12:20,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:12:20,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-21 20:12:20,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287002297] [2021-02-21 20:12:20,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-21 20:12:20,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:12:20,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-21 20:12:20,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-02-21 20:12:20,156 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 8 states. [2021-02-21 20:12:20,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:12:20,496 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2021-02-21 20:12:20,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-21 20:12:20,497 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2021-02-21 20:12:20,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:12:20,498 INFO L225 Difference]: With dead ends: 61 [2021-02-21 20:12:20,498 INFO L226 Difference]: Without dead ends: 55 [2021-02-21 20:12:20,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-02-21 20:12:20,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-02-21 20:12:20,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-02-21 20:12:20,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-02-21 20:12:20,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2021-02-21 20:12:20,517 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 44 [2021-02-21 20:12:20,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:12:20,517 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2021-02-21 20:12:20,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-21 20:12:20,517 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2021-02-21 20:12:20,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-02-21 20:12:20,519 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:12:20,519 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:12:20,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-21 20:12:20,520 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:12:20,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:12:20,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1474464430, now seen corresponding path program 1 times [2021-02-21 20:12:20,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:12:20,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017825334] [2021-02-21 20:12:20,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:12:20,522 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:12:20,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:12:20,545 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:20,546 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:12:20,546 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:20,547 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:12:20,549 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:20,550 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:12:20,553 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:20,554 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:12:20,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:12:20,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:12:20,578 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:20,578 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:12:20,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-21 20:12:20,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:12:20,590 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:20,590 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:12:20,591 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:20,591 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:12:20,597 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:20,597 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:12:20,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-02-21 20:12:20,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:12:20,620 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:20,621 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:12:20,622 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:20,623 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:12:20,629 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:20,630 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:12:20,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-02-21 20:12:20,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:12:20,636 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:20,637 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:12:20,638 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:20,638 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:12:20,646 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:12:20,646 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:12:20,652 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-02-21 20:12:20,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017825334] [2021-02-21 20:12:20,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:12:20,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-21 20:12:20,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841025508] [2021-02-21 20:12:20,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-21 20:12:20,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:12:20,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-21 20:12:20,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-02-21 20:12:20,654 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand 9 states. [2021-02-21 20:12:20,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:12:20,994 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2021-02-21 20:12:20,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-21 20:12:20,994 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2021-02-21 20:12:20,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:12:20,995 INFO L225 Difference]: With dead ends: 55 [2021-02-21 20:12:20,995 INFO L226 Difference]: Without dead ends: 0 [2021-02-21 20:12:20,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-02-21 20:12:20,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-21 20:12:20,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-21 20:12:20,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-21 20:12:20,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-21 20:12:20,997 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 55 [2021-02-21 20:12:20,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:12:20,997 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-21 20:12:20,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-21 20:12:20,997 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-21 20:12:20,997 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-21 20:12:20,998 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-21 20:12:21,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-21 20:12:22,061 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-21 20:12:22,061 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-21 20:12:22,061 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-21 20:12:22,061 INFO L192 CegarLoopUtils]: At program point L3-2(line 3) the Hoare annotation is: true [2021-02-21 20:12:22,061 INFO L192 CegarLoopUtils]: At program point L3-3(line 3) the Hoare annotation is: true [2021-02-21 20:12:22,062 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-21 20:12:22,062 INFO L192 CegarLoopUtils]: At program point L3-4(line 3) the Hoare annotation is: true [2021-02-21 20:12:22,062 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-21 20:12:22,062 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line 3) the Hoare annotation is: true [2021-02-21 20:12:22,062 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-02-21 20:12:22,062 INFO L192 CegarLoopUtils]: At program point L3(line 3) the Hoare annotation is: true [2021-02-21 20:12:22,062 INFO L192 CegarLoopUtils]: At program point L3-1(line 3) the Hoare annotation is: true [2021-02-21 20:12:22,062 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-02-21 20:12:22,063 INFO L185 CegarLoopUtils]: At program point gcdFINAL(lines 17 28) the Hoare annotation is: (let ((.cse0 (= gcd_~y2 |gcd_#in~y2|)) (.cse1 (= gcd_~y1 |gcd_#in~y1|))) (or (and (or (<= |gcd_#in~y2| 0) (<= |gcd_#in~y1| 0)) .cse0 .cse1) (and (<= 1 |gcd_#res|) .cse0 .cse1))) [2021-02-21 20:12:22,063 INFO L185 CegarLoopUtils]: At program point L27(line 27) the Hoare annotation is: (and (= gcd_~y2 |gcd_#in~y2|) (< gcd_~y1 gcd_~y2) (= gcd_~y1 |gcd_#in~y1|) (<= 1 gcd_~y1)) [2021-02-21 20:12:22,063 INFO L185 CegarLoopUtils]: At program point gcdEXIT(lines 17 28) the Hoare annotation is: (let ((.cse0 (= gcd_~y2 |gcd_#in~y2|)) (.cse1 (= gcd_~y1 |gcd_#in~y1|))) (or (and (or (<= |gcd_#in~y2| 0) (<= |gcd_#in~y1| 0)) .cse0 .cse1) (and (<= 1 |gcd_#res|) .cse0 .cse1))) [2021-02-21 20:12:22,063 INFO L185 CegarLoopUtils]: At program point L27-1(line 27) the Hoare annotation is: (and (<= 1 |gcd_#t~ret8|) (= gcd_~y2 |gcd_#in~y2|) (< gcd_~y1 gcd_~y2) (= gcd_~y1 |gcd_#in~y1|) (<= 1 gcd_~y1)) [2021-02-21 20:12:22,063 INFO L185 CegarLoopUtils]: At program point L25(line 25) the Hoare annotation is: (and (<= 1 gcd_~y2) (<= (+ gcd_~y2 1) gcd_~y1) (= gcd_~y2 |gcd_#in~y2|) (= gcd_~y1 |gcd_#in~y1|)) [2021-02-21 20:12:22,063 INFO L185 CegarLoopUtils]: At program point L27-2(line 27) the Hoare annotation is: (and (<= 1 |gcd_#t~ret8|) (= gcd_~y2 |gcd_#in~y2|) (< gcd_~y1 gcd_~y2) (= gcd_~y1 |gcd_#in~y1|) (<= 1 gcd_~y1)) [2021-02-21 20:12:22,063 INFO L185 CegarLoopUtils]: At program point L24(lines 24 26) the Hoare annotation is: (and (not (= gcd_~y1 gcd_~y2)) (<= 1 gcd_~y2) (= gcd_~y2 |gcd_#in~y2|) (= gcd_~y1 |gcd_#in~y1|) (<= 1 gcd_~y1)) [2021-02-21 20:12:22,064 INFO L185 CegarLoopUtils]: At program point L25-1(line 25) the Hoare annotation is: (and (<= 1 gcd_~y2) (<= (+ gcd_~y2 1) gcd_~y1) (= gcd_~y2 |gcd_#in~y2|) (= gcd_~y1 |gcd_#in~y1|) (<= 1 |gcd_#t~ret7|)) [2021-02-21 20:12:22,064 INFO L185 CegarLoopUtils]: At program point L27-3(line 27) the Hoare annotation is: (and (<= 1 |gcd_#res|) (<= 1 |gcd_#t~ret8|) (= gcd_~y2 |gcd_#in~y2|) (< gcd_~y1 gcd_~y2) (= gcd_~y1 |gcd_#in~y1|) (<= 1 gcd_~y1)) [2021-02-21 20:12:22,064 INFO L192 CegarLoopUtils]: At program point gcdENTRY(lines 17 28) the Hoare annotation is: true [2021-02-21 20:12:22,064 INFO L185 CegarLoopUtils]: At program point L25-2(line 25) the Hoare annotation is: (and (<= 1 gcd_~y2) (<= (+ gcd_~y2 1) gcd_~y1) (= gcd_~y2 |gcd_#in~y2|) (= gcd_~y1 |gcd_#in~y1|) (<= 1 |gcd_#t~ret7|)) [2021-02-21 20:12:22,064 INFO L185 CegarLoopUtils]: At program point L22(line 22) the Hoare annotation is: (and (<= 1 gcd_~y2) (= gcd_~y2 |gcd_#in~y2|) (= gcd_~y1 |gcd_#in~y1|) (<= 1 gcd_~y1)) [2021-02-21 20:12:22,064 INFO L185 CegarLoopUtils]: At program point L25-3(line 25) the Hoare annotation is: (and (<= 1 gcd_~y2) (<= 1 |gcd_#res|) (<= (+ gcd_~y2 1) gcd_~y1) (= gcd_~y2 |gcd_#in~y2|) (= gcd_~y1 |gcd_#in~y1|) (<= 1 |gcd_#t~ret7|)) [2021-02-21 20:12:22,064 INFO L185 CegarLoopUtils]: At program point L21(lines 21 23) the Hoare annotation is: (and (<= 1 gcd_~y2) (= gcd_~y2 |gcd_#in~y2|) (= gcd_~y1 |gcd_#in~y1|) (<= 1 gcd_~y1)) [2021-02-21 20:12:22,064 INFO L185 CegarLoopUtils]: At program point L19(line 19) the Hoare annotation is: (and (or (<= |gcd_#in~y2| 0) (<= |gcd_#in~y1| 0)) (= gcd_~y2 |gcd_#in~y2|) (= gcd_~y1 |gcd_#in~y1|)) [2021-02-21 20:12:22,064 INFO L185 CegarLoopUtils]: At program point L18(lines 18 20) the Hoare annotation is: (and (= gcd_~y2 |gcd_#in~y2|) (= gcd_~y1 |gcd_#in~y1|)) [2021-02-21 20:12:22,065 INFO L185 CegarLoopUtils]: At program point L17(lines 17 28) the Hoare annotation is: (= gcd_~y1 |gcd_#in~y1|) [2021-02-21 20:12:22,065 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-21 20:12:22,065 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-21 20:12:22,065 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-21 20:12:22,065 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-21 20:12:22,065 INFO L192 CegarLoopUtils]: At program point L33(line 33) the Hoare annotation is: true [2021-02-21 20:12:22,065 INFO L185 CegarLoopUtils]: At program point L35-2(line 35) the Hoare annotation is: (<= 1 main_~m~0) [2021-02-21 20:12:22,065 INFO L192 CegarLoopUtils]: At program point L31(line 31) the Hoare annotation is: true [2021-02-21 20:12:22,066 INFO L192 CegarLoopUtils]: At program point L31-1(line 31) the Hoare annotation is: true [2021-02-21 20:12:22,066 INFO L192 CegarLoopUtils]: At program point mainEXIT(lines 30 45) the Hoare annotation is: true [2021-02-21 20:12:22,066 INFO L185 CegarLoopUtils]: At program point L40(lines 40 44) the Hoare annotation is: (and (<= 1 main_~n~0) (<= 1 main_~z~0) (<= 1 main_~m~0)) [2021-02-21 20:12:22,066 INFO L192 CegarLoopUtils]: At program point L40-1(lines 30 45) the Hoare annotation is: true [2021-02-21 20:12:22,066 INFO L185 CegarLoopUtils]: At program point L36(lines 36 38) the Hoare annotation is: (<= 1 main_~m~0) [2021-02-21 20:12:22,066 INFO L192 CegarLoopUtils]: At program point L32(lines 32 34) the Hoare annotation is: true [2021-02-21 20:12:22,066 INFO L185 CegarLoopUtils]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 41) the Hoare annotation is: false [2021-02-21 20:12:22,066 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 30 45) the Hoare annotation is: true [2021-02-21 20:12:22,067 INFO L185 CegarLoopUtils]: At program point L43(line 43) the Hoare annotation is: (and (<= 1 main_~n~0) (<= 1 main_~m~0)) [2021-02-21 20:12:22,067 INFO L185 CegarLoopUtils]: At program point L41(line 41) the Hoare annotation is: false [2021-02-21 20:12:22,067 INFO L185 CegarLoopUtils]: At program point L41-1(line 41) the Hoare annotation is: false [2021-02-21 20:12:22,067 INFO L185 CegarLoopUtils]: At program point L39(line 39) the Hoare annotation is: (and (<= 1 main_~n~0) (<= 1 main_~m~0)) [2021-02-21 20:12:22,067 INFO L185 CegarLoopUtils]: At program point L39-1(line 39) the Hoare annotation is: (and (<= 1 |main_#t~ret11|) (<= 1 main_~n~0) (<= 1 main_~m~0)) [2021-02-21 20:12:22,067 INFO L185 CegarLoopUtils]: At program point L37(line 37) the Hoare annotation is: (<= 1 main_~m~0) [2021-02-21 20:12:22,067 INFO L185 CegarLoopUtils]: At program point L39-2(line 39) the Hoare annotation is: (and (<= 1 |main_#t~ret11|) (<= 1 main_~n~0) (<= 1 main_~m~0)) [2021-02-21 20:12:22,068 INFO L185 CegarLoopUtils]: At program point L39-3(line 39) the Hoare annotation is: (and (<= 1 |main_#t~ret11|) (<= 1 main_~n~0) (<= 1 main_~z~0) (<= 1 main_~m~0)) [2021-02-21 20:12:22,068 INFO L185 CegarLoopUtils]: At program point L35(line 35) the Hoare annotation is: (<= 1 main_~m~0) [2021-02-21 20:12:22,068 INFO L185 CegarLoopUtils]: At program point L35-1(line 35) the Hoare annotation is: (<= 1 main_~m~0) [2021-02-21 20:12:22,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 08:12:22 BoogieIcfgContainer [2021-02-21 20:12:22,086 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 20:12:22,089 INFO L168 Benchmark]: Toolchain (without parser) took 6345.49 ms. Allocated memory was 169.9 MB in the beginning and 245.4 MB in the end (delta: 75.5 MB). Free memory was 152.7 MB in the beginning and 91.2 MB in the end (delta: 61.4 MB). Peak memory consumption was 142.5 MB. Max. memory is 8.0 GB. [2021-02-21 20:12:22,089 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 169.9 MB. Free memory is still 142.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 20:12:22,092 INFO L168 Benchmark]: CACSL2BoogieTranslator took 291.04 ms. Allocated memory is still 169.9 MB. Free memory was 151.6 MB in the beginning and 142.1 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-21 20:12:22,093 INFO L168 Benchmark]: Boogie Preprocessor took 33.89 ms. Allocated memory is still 169.9 MB. Free memory was 142.1 MB in the beginning and 140.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-21 20:12:22,093 INFO L168 Benchmark]: RCFGBuilder took 411.34 ms. Allocated memory is still 169.9 MB. Free memory was 140.7 MB in the beginning and 138.1 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-21 20:12:22,097 INFO L168 Benchmark]: TraceAbstraction took 5587.85 ms. Allocated memory was 169.9 MB in the beginning and 245.4 MB in the end (delta: 75.5 MB). Free memory was 137.8 MB in the beginning and 91.2 MB in the end (delta: 46.6 MB). Peak memory consumption was 128.5 MB. Max. memory is 8.0 GB. [2021-02-21 20:12:22,102 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 169.9 MB. Free memory is still 142.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 291.04 ms. Allocated memory is still 169.9 MB. Free memory was 151.6 MB in the beginning and 142.1 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.89 ms. Allocated memory is still 169.9 MB. Free memory was 142.1 MB in the beginning and 140.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 411.34 ms. Allocated memory is still 169.9 MB. Free memory was 140.7 MB in the beginning and 138.1 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5587.85 ms. Allocated memory was 169.9 MB in the beginning and 245.4 MB in the end (delta: 75.5 MB). Free memory was 137.8 MB in the beginning and 91.2 MB in the end (delta: 46.6 MB). Peak memory consumption was 128.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 41]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - ProcedureContractResult [Line: 17]: Procedure Contract for gcd Derived contract for procedure gcd: (((\old(y2) <= 0 || \old(y1) <= 0) && y2 == \old(y2)) && y1 == \old(y1)) || ((1 <= \result && y2 == \old(y2)) && y1 == \old(y1)) - ProcedureContractResult [Line: 30]: Procedure Contract for main Derived contract for procedure main: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 55 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.4s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 266 SDtfs, 431 SDslu, 457 SDs, 0 SdLazy, 996 SolverSat, 88 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 140 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=55occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 52 LocationsWithAnnotation, 86 PreInvPairs, 148 NumberOfFragments, 380 HoareAnnotationTreeSize, 86 FomulaSimplifications, 6110 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 52 FomulaSimplificationsInter, 1851 FormulaSimplificationTreeSizeReductionInter, 0.7s HoareSimplificationTimeInter, 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 correct! Received shutdown request...