/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-36cd7be [2021-02-23 17:39:43,727 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 17:39:43,730 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 17:39:43,769 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 17:39:43,783 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 17:39:43,784 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 17:39:43,786 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 17:39:43,787 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 17:39:43,788 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 17:39:43,790 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 17:39:43,792 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 17:39:43,794 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 17:39:43,796 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 17:39:43,800 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 17:39:43,802 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 17:39:43,804 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 17:39:43,815 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 17:39:43,840 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 17:39:43,841 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 17:39:43,843 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 17:39:43,844 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 17:39:43,872 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 17:39:43,872 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 17:39:43,878 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 17:39:43,878 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 17:39:43,879 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 17:39:43,879 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 17:39:43,879 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 17:39:43,879 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 17:39:43,880 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 17:39:43,880 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 17:39:43,881 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 17:39:43,882 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 17:39:43,882 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 17:39:43,882 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 17:39:43,883 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 17:39:43,883 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 17:39:43,883 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 17:39:43,883 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 17:39:43,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 17:39:43,884 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 17:39:43,884 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 17:39:43,885 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 17:39:43,885 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 17:39:44,421 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 17:39:44,447 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 17:39:44,451 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 17:39:44,453 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 17:39:44,454 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 17:39:44,455 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/gcd01-1.c [2021-02-23 17:39:44,541 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c520fcaf8/694ab5d5fed74ed68f99ce7c8dbfb88b/FLAGbfe6975e7 [2021-02-23 17:39:45,145 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 17:39:45,146 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/gcd01-1.c [2021-02-23 17:39:45,153 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c520fcaf8/694ab5d5fed74ed68f99ce7c8dbfb88b/FLAGbfe6975e7 [2021-02-23 17:39:45,534 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c520fcaf8/694ab5d5fed74ed68f99ce7c8dbfb88b [2021-02-23 17:39:45,539 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 17:39:45,553 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 17:39:45,555 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 17:39:45,555 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 17:39:45,559 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 17:39:45,560 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:39:45" (1/1) ... [2021-02-23 17:39:45,561 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c5f967 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:39:45, skipping insertion in model container [2021-02-23 17:39:45,561 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:39:45" (1/1) ... [2021-02-23 17:39:45,569 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 17:39:45,584 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 17:39:45,760 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] [2021-02-23 17:39:45,766 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 17:39:45,780 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 17:39:45,809 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] [2021-02-23 17:39:45,811 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 17:39:45,838 INFO L208 MainTranslator]: Completed translation [2021-02-23 17:39:45,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:39:45 WrapperNode [2021-02-23 17:39:45,839 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 17:39:45,841 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 17:39:45,841 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 17:39:45,841 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 17:39:45,858 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:39:45" (1/1) ... [2021-02-23 17:39:45,859 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:39:45" (1/1) ... [2021-02-23 17:39:45,872 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:39:45" (1/1) ... [2021-02-23 17:39:45,872 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:39:45" (1/1) ... [2021-02-23 17:39:45,890 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:39:45" (1/1) ... [2021-02-23 17:39:45,895 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:39:45" (1/1) ... [2021-02-23 17:39:45,898 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:39:45" (1/1) ... [2021-02-23 17:39:45,908 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 17:39:45,911 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 17:39:45,912 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 17:39:45,912 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 17:39:45,913 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:39:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 17:39:46,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 17:39:46,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 17:39:46,068 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 17:39:46,068 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2021-02-23 17:39:46,068 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 17:39:46,069 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 17:39:46,069 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 17:39:46,069 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 17:39:46,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 17:39:46,070 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 17:39:46,071 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2021-02-23 17:39:46,071 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 17:39:46,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 17:39:46,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 17:39:46,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 17:39:46,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 17:39:46,074 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 17:39:46,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 17:39:46,437 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 17:39:46,437 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-23 17:39:46,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:39:46 BoogieIcfgContainer [2021-02-23 17:39:46,440 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 17:39:46,441 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 17:39:46,442 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 17:39:46,445 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 17:39:46,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 05:39:45" (1/3) ... [2021-02-23 17:39:46,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d824834 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:39:46, skipping insertion in model container [2021-02-23 17:39:46,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:39:45" (2/3) ... [2021-02-23 17:39:46,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d824834 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:39:46, skipping insertion in model container [2021-02-23 17:39:46,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:39:46" (3/3) ... [2021-02-23 17:39:46,449 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd01-1.c [2021-02-23 17:39:46,459 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 17:39:46,467 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 17:39:46,535 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 17:39:46,598 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 17:39:46,598 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 17:39:46,598 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 17:39:46,599 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 17:39:46,599 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 17:39:46,599 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 17:39:46,599 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 17:39:46,599 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 17:39:46,624 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states. [2021-02-23 17:39:46,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-23 17:39:46,640 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:39:46,642 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] [2021-02-23 17:39:46,642 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:39:46,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:39:46,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1211389042, now seen corresponding path program 1 times [2021-02-23 17:39:46,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:39:46,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587464375] [2021-02-23 17:39:46,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:39:46,765 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:39:46,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:47,039 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:47,042 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:47,047 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:47,050 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:47,083 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:47,085 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:39:47,129 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:47,131 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:47,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:39:47,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:47,269 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:47,271 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:47,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-23 17:39:47,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:47,331 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:47,333 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:47,352 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:47,354 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:39:47,373 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:47,377 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:39:47,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 17:39:47,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [587464375] [2021-02-23 17:39:47,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:39:47,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-23 17:39:47,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227677411] [2021-02-23 17:39:47,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-23 17:39:47,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:39:47,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-23 17:39:47,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-23 17:39:47,459 INFO L87 Difference]: Start difference. First operand 52 states. Second operand 8 states. [2021-02-23 17:39:48,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:39:48,163 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2021-02-23 17:39:48,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-23 17:39:48,166 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2021-02-23 17:39:48,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:39:48,190 INFO L225 Difference]: With dead ends: 69 [2021-02-23 17:39:48,191 INFO L226 Difference]: Without dead ends: 46 [2021-02-23 17:39:48,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-02-23 17:39:48,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-02-23 17:39:48,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-02-23 17:39:48,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-02-23 17:39:48,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-02-23 17:39:48,261 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 32 [2021-02-23 17:39:48,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:39:48,262 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-02-23 17:39:48,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-23 17:39:48,262 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-02-23 17:39:48,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-23 17:39:48,265 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:39:48,266 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] [2021-02-23 17:39:48,266 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 17:39:48,266 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:39:48,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:39:48,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1584443520, now seen corresponding path program 1 times [2021-02-23 17:39:48,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:39:48,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077131929] [2021-02-23 17:39:48,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:39:48,271 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:39:48,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:48,314 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:48,315 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:48,316 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:48,317 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:48,325 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:48,326 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:48,334 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:48,336 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:48,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:39:48,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:48,411 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:48,412 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:48,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-23 17:39:48,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:48,442 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:48,443 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:48,444 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:48,446 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:48,458 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:48,458 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:48,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 17:39:48,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077131929] [2021-02-23 17:39:48,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:39:48,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-23 17:39:48,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146699881] [2021-02-23 17:39:48,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-23 17:39:48,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:39:48,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-23 17:39:48,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-23 17:39:48,482 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 7 states. [2021-02-23 17:39:48,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:39:48,901 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2021-02-23 17:39:48,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-23 17:39:48,902 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2021-02-23 17:39:48,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:39:48,904 INFO L225 Difference]: With dead ends: 54 [2021-02-23 17:39:48,904 INFO L226 Difference]: Without dead ends: 48 [2021-02-23 17:39:48,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-02-23 17:39:48,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-02-23 17:39:48,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-02-23 17:39:48,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-02-23 17:39:48,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-02-23 17:39:48,924 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 33 [2021-02-23 17:39:48,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:39:48,925 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-02-23 17:39:48,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-23 17:39:48,925 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-02-23 17:39:48,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-02-23 17:39:48,927 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:39:48,927 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] [2021-02-23 17:39:48,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 17:39:48,928 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:39:48,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:39:48,928 INFO L82 PathProgramCache]: Analyzing trace with hash -207814176, now seen corresponding path program 1 times [2021-02-23 17:39:48,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:39:48,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934920926] [2021-02-23 17:39:48,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:39:48,931 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:39:48,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:48,985 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:48,986 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:48,986 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:48,987 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:49,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:39:49,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:49,045 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:49,045 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:49,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-23 17:39:49,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:49,061 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:49,061 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:49,062 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:49,063 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:49,069 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:49,071 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 17:39:49,082 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:49,082 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:49,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-02-23 17:39:49,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:49,096 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:49,097 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:49,105 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:49,106 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:39:49,119 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:49,120 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:39:49,140 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-23 17:39:49,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934920926] [2021-02-23 17:39:49,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:39:49,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-23 17:39:49,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849351578] [2021-02-23 17:39:49,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-23 17:39:49,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:39:49,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-23 17:39:49,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-23 17:39:49,143 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 8 states. [2021-02-23 17:39:49,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:39:49,569 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2021-02-23 17:39:49,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-23 17:39:49,570 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2021-02-23 17:39:49,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:39:49,575 INFO L225 Difference]: With dead ends: 64 [2021-02-23 17:39:49,576 INFO L226 Difference]: Without dead ends: 50 [2021-02-23 17:39:49,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-02-23 17:39:49,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-02-23 17:39:49,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2021-02-23 17:39:49,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-02-23 17:39:49,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2021-02-23 17:39:49,614 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 43 [2021-02-23 17:39:49,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:39:49,615 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2021-02-23 17:39:49,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-23 17:39:49,615 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2021-02-23 17:39:49,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-02-23 17:39:49,624 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:39:49,624 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] [2021-02-23 17:39:49,625 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 17:39:49,625 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:39:49,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:39:49,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1203687162, now seen corresponding path program 1 times [2021-02-23 17:39:49,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:39:49,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [54733965] [2021-02-23 17:39:49,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:39:49,631 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:39:49,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:49,695 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:49,696 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:49,697 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:49,698 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:49,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:39:49,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:49,741 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:49,741 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:49,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-23 17:39:49,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:49,776 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:49,776 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:49,777 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:49,778 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:49,786 WARN L141 QuantifierPusher]: treesize reduction 9, result has 47.1 percent of original size [2021-02-23 17:39:49,787 WARN L147 QuantifierPusher]: treesize reduction 9, result has 47.1 percent of original size 8 [2021-02-23 17:39:49,796 WARN L141 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-02-23 17:39:49,797 WARN L147 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size 7 [2021-02-23 17:39:49,807 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:49,808 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:49,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-02-23 17:39:49,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:49,827 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:49,828 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:49,837 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:49,843 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:39:49,855 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:49,856 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:39:49,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-23 17:39:49,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [54733965] [2021-02-23 17:39:49,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:39:49,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-23 17:39:49,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546498018] [2021-02-23 17:39:49,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-23 17:39:49,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:39:49,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-23 17:39:49,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-02-23 17:39:49,878 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 9 states. [2021-02-23 17:39:50,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:39:50,242 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2021-02-23 17:39:50,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-23 17:39:50,243 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2021-02-23 17:39:50,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:39:50,244 INFO L225 Difference]: With dead ends: 64 [2021-02-23 17:39:50,244 INFO L226 Difference]: Without dead ends: 47 [2021-02-23 17:39:50,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-02-23 17:39:50,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-02-23 17:39:50,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2021-02-23 17:39:50,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-02-23 17:39:50,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-02-23 17:39:50,258 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 43 [2021-02-23 17:39:50,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:39:50,258 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-02-23 17:39:50,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-23 17:39:50,258 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-02-23 17:39:50,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-23 17:39:50,259 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:39:50,260 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] [2021-02-23 17:39:50,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 17:39:50,260 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:39:50,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:39:50,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1175923098, now seen corresponding path program 1 times [2021-02-23 17:39:50,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:39:50,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1707331224] [2021-02-23 17:39:50,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:39:50,263 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:39:50,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:50,298 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:50,298 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:50,299 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:50,300 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:50,303 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:50,303 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:50,307 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:50,308 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:50,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:39:50,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:50,344 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:50,344 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:50,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-23 17:39:50,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:50,362 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:50,363 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:50,376 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:50,377 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:50,384 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:50,385 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:50,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-02-23 17:39:50,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:50,405 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:50,406 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:50,407 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:50,407 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:50,417 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:50,421 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:50,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-23 17:39:50,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1707331224] [2021-02-23 17:39:50,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:39:50,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-23 17:39:50,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871690939] [2021-02-23 17:39:50,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-23 17:39:50,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:39:50,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-23 17:39:50,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-02-23 17:39:50,428 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 8 states. [2021-02-23 17:39:50,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:39:50,822 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2021-02-23 17:39:50,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-23 17:39:50,823 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2021-02-23 17:39:50,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:39:50,824 INFO L225 Difference]: With dead ends: 56 [2021-02-23 17:39:50,824 INFO L226 Difference]: Without dead ends: 50 [2021-02-23 17:39:50,825 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 [2021-02-23 17:39:50,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-02-23 17:39:50,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2021-02-23 17:39:50,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-02-23 17:39:50,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2021-02-23 17:39:50,838 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 44 [2021-02-23 17:39:50,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:39:50,838 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2021-02-23 17:39:50,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-23 17:39:50,839 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2021-02-23 17:39:50,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-23 17:39:50,839 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:39:50,840 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] [2021-02-23 17:39:50,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 17:39:50,840 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:39:50,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:39:50,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1350337254, now seen corresponding path program 1 times [2021-02-23 17:39:50,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:39:50,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529911907] [2021-02-23 17:39:50,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:39:50,843 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:39:50,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:50,864 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:50,865 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:50,866 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:50,867 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:50,872 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:50,874 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:50,879 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:50,880 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:50,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:39:50,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:50,913 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:50,913 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:50,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-23 17:39:50,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:50,927 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:50,930 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:50,931 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:50,931 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:50,938 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:50,938 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:50,946 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:50,946 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:50,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-02-23 17:39:50,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:50,963 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:50,964 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:50,964 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:50,965 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:50,965 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:50,966 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:50,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-23 17:39:50,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1529911907] [2021-02-23 17:39:50,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:39:50,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-23 17:39:50,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673334222] [2021-02-23 17:39:50,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-23 17:39:50,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:39:50,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-23 17:39:50,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-02-23 17:39:50,971 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 8 states. [2021-02-23 17:39:51,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:39:51,379 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2021-02-23 17:39:51,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-23 17:39:51,379 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2021-02-23 17:39:51,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:39:51,381 INFO L225 Difference]: With dead ends: 61 [2021-02-23 17:39:51,381 INFO L226 Difference]: Without dead ends: 55 [2021-02-23 17:39:51,381 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 [2021-02-23 17:39:51,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-02-23 17:39:51,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-02-23 17:39:51,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-02-23 17:39:51,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2021-02-23 17:39:51,397 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 44 [2021-02-23 17:39:51,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:39:51,397 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2021-02-23 17:39:51,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-23 17:39:51,397 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2021-02-23 17:39:51,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-02-23 17:39:51,398 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:39:51,398 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] [2021-02-23 17:39:51,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 17:39:51,399 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:39:51,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:39:51,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1474464430, now seen corresponding path program 1 times [2021-02-23 17:39:51,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:39:51,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585927623] [2021-02-23 17:39:51,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:39:51,401 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:39:51,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:51,423 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:51,424 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:51,424 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:51,425 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:51,428 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:51,428 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:51,432 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:51,433 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:51,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:39:51,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:51,463 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:51,464 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:51,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-23 17:39:51,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:51,475 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:51,476 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:51,476 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:51,477 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:51,483 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:51,484 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:51,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-02-23 17:39:51,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:51,501 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:51,502 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:51,503 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:51,503 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:51,512 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:51,512 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:51,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-02-23 17:39:51,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:51,524 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:51,525 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:51,526 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:51,526 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:51,536 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:51,541 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:51,549 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-02-23 17:39:51,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585927623] [2021-02-23 17:39:51,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:39:51,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-23 17:39:51,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50546900] [2021-02-23 17:39:51,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-23 17:39:51,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:39:51,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-23 17:39:51,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-02-23 17:39:51,553 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand 9 states. [2021-02-23 17:39:52,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:39:52,009 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2021-02-23 17:39:52,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-23 17:39:52,009 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2021-02-23 17:39:52,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:39:52,010 INFO L225 Difference]: With dead ends: 55 [2021-02-23 17:39:52,010 INFO L226 Difference]: Without dead ends: 0 [2021-02-23 17:39:52,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-02-23 17:39:52,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-23 17:39:52,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-23 17:39:52,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-23 17:39:52,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-23 17:39:52,012 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 55 [2021-02-23 17:39:52,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:39:52,012 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-23 17:39:52,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-23 17:39:52,013 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-23 17:39:52,013 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-23 17:39:52,013 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-23 17:39:52,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-23 17:39:53,055 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 16 [2021-02-23 17:39:53,161 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 16 [2021-02-23 17:39:53,360 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-23 17:39:53,360 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-23 17:39:53,360 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-23 17:39:53,361 INFO L192 CegarLoopUtils]: At program point L3-2(line 3) the Hoare annotation is: true [2021-02-23 17:39:53,361 INFO L192 CegarLoopUtils]: At program point L3-3(line 3) the Hoare annotation is: true [2021-02-23 17:39:53,361 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-23 17:39:53,361 INFO L192 CegarLoopUtils]: At program point L3-4(line 3) the Hoare annotation is: true [2021-02-23 17:39:53,361 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-23 17:39:53,361 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line 3) the Hoare annotation is: true [2021-02-23 17:39:53,361 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|)) [2021-02-23 17:39:53,362 INFO L192 CegarLoopUtils]: At program point L3(line 3) the Hoare annotation is: true [2021-02-23 17:39:53,362 INFO L192 CegarLoopUtils]: At program point L3-1(line 3) the Hoare annotation is: true [2021-02-23 17:39:53,362 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-02-23 17:39:53,362 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))) [2021-02-23 17:39:53,362 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)) [2021-02-23 17:39:53,362 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))) [2021-02-23 17:39:53,363 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)) [2021-02-23 17:39:53,363 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|)) [2021-02-23 17:39:53,363 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)) [2021-02-23 17:39:53,363 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)) [2021-02-23 17:39:53,363 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|)) [2021-02-23 17:39:53,364 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)) [2021-02-23 17:39:53,364 INFO L192 CegarLoopUtils]: At program point gcdENTRY(lines 17 28) the Hoare annotation is: true [2021-02-23 17:39:53,364 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|)) [2021-02-23 17:39:53,364 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)) [2021-02-23 17:39:53,364 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|)) [2021-02-23 17:39:53,364 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)) [2021-02-23 17:39:53,364 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|)) [2021-02-23 17:39:53,365 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|)) [2021-02-23 17:39:53,365 INFO L185 CegarLoopUtils]: At program point L17(lines 17 28) the Hoare annotation is: (= gcd_~y1 |gcd_#in~y1|) [2021-02-23 17:39:53,365 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-23 17:39:53,365 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-23 17:39:53,365 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-23 17:39:53,365 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-23 17:39:53,365 INFO L192 CegarLoopUtils]: At program point L33(line 33) the Hoare annotation is: true [2021-02-23 17:39:53,365 INFO L185 CegarLoopUtils]: At program point L35-2(line 35) the Hoare annotation is: (<= 1 main_~m~0) [2021-02-23 17:39:53,365 INFO L192 CegarLoopUtils]: At program point L31(line 31) the Hoare annotation is: true [2021-02-23 17:39:53,366 INFO L192 CegarLoopUtils]: At program point L31-1(line 31) the Hoare annotation is: true [2021-02-23 17:39:53,366 INFO L192 CegarLoopUtils]: At program point mainEXIT(lines 30 45) the Hoare annotation is: true [2021-02-23 17:39:53,366 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)) [2021-02-23 17:39:53,366 INFO L192 CegarLoopUtils]: At program point L40-1(lines 30 45) the Hoare annotation is: true [2021-02-23 17:39:53,366 INFO L185 CegarLoopUtils]: At program point L36(lines 36 38) the Hoare annotation is: (<= 1 main_~m~0) [2021-02-23 17:39:53,366 INFO L192 CegarLoopUtils]: At program point L32(lines 32 34) the Hoare annotation is: true [2021-02-23 17:39:53,366 INFO L185 CegarLoopUtils]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 41) the Hoare annotation is: false [2021-02-23 17:39:53,367 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 30 45) the Hoare annotation is: true [2021-02-23 17:39:53,367 INFO L185 CegarLoopUtils]: At program point L43(line 43) the Hoare annotation is: (and (<= 1 main_~n~0) (<= 1 main_~m~0)) [2021-02-23 17:39:53,367 INFO L185 CegarLoopUtils]: At program point L41(line 41) the Hoare annotation is: false [2021-02-23 17:39:53,367 INFO L185 CegarLoopUtils]: At program point L41-1(line 41) the Hoare annotation is: false [2021-02-23 17:39:53,367 INFO L185 CegarLoopUtils]: At program point L39(line 39) the Hoare annotation is: (and (<= 1 main_~n~0) (<= 1 main_~m~0)) [2021-02-23 17:39:53,367 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)) [2021-02-23 17:39:53,367 INFO L185 CegarLoopUtils]: At program point L37(line 37) the Hoare annotation is: (<= 1 main_~m~0) [2021-02-23 17:39:53,368 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)) [2021-02-23 17:39:53,368 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)) [2021-02-23 17:39:53,368 INFO L185 CegarLoopUtils]: At program point L35(line 35) the Hoare annotation is: (<= 1 main_~m~0) [2021-02-23 17:39:53,368 INFO L185 CegarLoopUtils]: At program point L35-1(line 35) the Hoare annotation is: (<= 1 main_~m~0) [2021-02-23 17:39:53,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 05:39:53 BoogieIcfgContainer [2021-02-23 17:39:53,389 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 17:39:53,390 INFO L168 Benchmark]: Toolchain (without parser) took 7849.00 ms. Allocated memory was 151.0 MB in the beginning and 230.7 MB in the end (delta: 79.7 MB). Free memory was 128.0 MB in the beginning and 81.1 MB in the end (delta: 46.9 MB). Peak memory consumption was 128.7 MB. Max. memory is 8.0 GB. [2021-02-23 17:39:53,390 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 130.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 17:39:53,391 INFO L168 Benchmark]: CACSL2BoogieTranslator took 285.10 ms. Allocated memory is still 151.0 MB. Free memory was 126.8 MB in the beginning and 117.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 17:39:53,392 INFO L168 Benchmark]: Boogie Preprocessor took 67.95 ms. Allocated memory is still 151.0 MB. Free memory was 117.2 MB in the beginning and 115.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 17:39:53,392 INFO L168 Benchmark]: RCFGBuilder took 528.35 ms. Allocated memory is still 151.0 MB. Free memory was 115.9 MB in the beginning and 99.9 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-02-23 17:39:53,393 INFO L168 Benchmark]: TraceAbstraction took 6947.25 ms. Allocated memory was 151.0 MB in the beginning and 230.7 MB in the end (delta: 79.7 MB). Free memory was 99.5 MB in the beginning and 81.1 MB in the end (delta: 18.4 MB). Peak memory consumption was 100.4 MB. Max. memory is 8.0 GB. [2021-02-23 17:39:53,395 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 151.0 MB. Free memory is still 130.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 285.10 ms. Allocated memory is still 151.0 MB. Free memory was 126.8 MB in the beginning and 117.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 67.95 ms. Allocated memory is still 151.0 MB. Free memory was 117.2 MB in the beginning and 115.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 528.35 ms. Allocated memory is still 151.0 MB. Free memory was 115.9 MB in the beginning and 99.9 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6947.25 ms. Allocated memory was 151.0 MB in the beginning and 230.7 MB in the end (delta: 79.7 MB). Free memory was 99.5 MB in the beginning and 81.1 MB in the end (delta: 18.4 MB). Peak memory consumption was 100.4 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: 5.4s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 3.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 266 SDtfs, 431 SDslu, 457 SDs, 0 SdLazy, 996 SolverSat, 88 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 140 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 2.1s 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, 0.9s 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...