/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/double_req_bl_1231b.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-19 17:19:57,716 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 17:19:57,719 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 17:19:57,752 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-19 17:19:57,753 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-19 17:19:57,754 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-19 17:19:57,756 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-19 17:19:57,758 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-19 17:19:57,760 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-19 17:19:57,772 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-19 17:19:57,775 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-19 17:19:57,778 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-19 17:19:57,778 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-19 17:19:57,784 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-19 17:19:57,786 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-19 17:19:57,787 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-19 17:19:57,791 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-19 17:19:57,793 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-19 17:19:57,800 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-19 17:19:57,805 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-19 17:19:57,809 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-19 17:19:57,811 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-19 17:19:57,813 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-19 17:19:57,815 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-19 17:19:57,821 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-19 17:19:57,838 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-19 17:19:57,839 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-19 17:19:57,839 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-19 17:19:57,840 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-02-19 17:19:57,890 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 17:19:57,890 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 17:19:57,894 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 17:19:57,895 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 17:19:57,895 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 17:19:57,895 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 17:19:57,896 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 17:19:57,896 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 17:19:57,896 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 17:19:57,896 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 17:19:57,897 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 17:19:57,897 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 17:19:57,898 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 17:19:57,898 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 17:19:57,898 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 17:19:57,898 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 17:19:57,898 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 17:19:57,899 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 17:19:57,899 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 17:19:57,899 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 17:19:57,899 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 17:19:57,899 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 17:19:57,900 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 17:19:57,900 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 17:19:57,900 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 17:19:57,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 17:19:57,900 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 17:19:57,900 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-19 17:19:57,901 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 17:19:58,300 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 17:19:58,338 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 17:19:58,341 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 17:19:58,343 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-19 17:19:58,344 INFO L275 PluginConnector]: CDTParser initialized [2021-02-19 17:19:58,345 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/double_req_bl_1231b.c [2021-02-19 17:19:58,435 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88f1917c6/cb408c259aea47889f2d58687934f0f2/FLAG427becddb [2021-02-19 17:19:58,983 INFO L306 CDTParser]: Found 1 translation units. [2021-02-19 17:19:58,984 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/double_req_bl_1231b.c [2021-02-19 17:19:58,992 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88f1917c6/cb408c259aea47889f2d58687934f0f2/FLAG427becddb [2021-02-19 17:19:59,369 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88f1917c6/cb408c259aea47889f2d58687934f0f2 [2021-02-19 17:19:59,372 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 17:19:59,387 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 17:19:59,392 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-19 17:19:59,393 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-19 17:19:59,397 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-19 17:19:59,399 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 05:19:59" (1/1) ... [2021-02-19 17:19:59,401 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11ea6ed4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:19:59, skipping insertion in model container [2021-02-19 17:19:59,401 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 05:19:59" (1/1) ... [2021-02-19 17:19:59,410 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-19 17:19:59,434 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-19 17:19:59,635 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/double_req_bl_1231b.c[1765,1778] [2021-02-19 17:19:59,647 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-19 17:19:59,661 INFO L203 MainTranslator]: Completed pre-run [2021-02-19 17:19:59,716 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/double_req_bl_1231b.c[1765,1778] [2021-02-19 17:19:59,720 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-19 17:19:59,747 INFO L208 MainTranslator]: Completed translation [2021-02-19 17:19:59,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:19:59 WrapperNode [2021-02-19 17:19:59,748 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-19 17:19:59,749 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 17:19:59,749 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 17:19:59,749 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 17:19:59,765 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:19:59" (1/1) ... [2021-02-19 17:19:59,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:19:59" (1/1) ... [2021-02-19 17:19:59,775 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:19:59" (1/1) ... [2021-02-19 17:19:59,776 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:19:59" (1/1) ... [2021-02-19 17:19:59,786 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:19:59" (1/1) ... [2021-02-19 17:19:59,792 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:19:59" (1/1) ... [2021-02-19 17:19:59,793 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:19:59" (1/1) ... [2021-02-19 17:19:59,796 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 17:19:59,797 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 17:19:59,797 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 17:19:59,797 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 17:19:59,799 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:19:59" (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 [2021-02-19 17:19:59,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-19 17:19:59,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 17:19:59,913 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-19 17:19:59,913 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_double [2021-02-19 17:19:59,914 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_double [2021-02-19 17:19:59,914 INFO L138 BoogieDeclarations]: Found implementation of procedure fmin_double [2021-02-19 17:19:59,914 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-19 17:19:59,914 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-19 17:19:59,915 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-19 17:19:59,915 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-19 17:19:59,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-19 17:19:59,915 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2021-02-19 17:19:59,915 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_double [2021-02-19 17:19:59,916 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_double [2021-02-19 17:19:59,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-02-19 17:19:59,916 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-19 17:19:59,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-19 17:19:59,917 INFO L130 BoogieDeclarations]: Found specification of procedure fmin_double [2021-02-19 17:19:59,917 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-19 17:19:59,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-19 17:19:59,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-19 17:19:59,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 17:19:59,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-19 17:19:59,918 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-02-19 17:20:00,445 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 17:20:00,446 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-02-19 17:20:00,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:20:00 BoogieIcfgContainer [2021-02-19 17:20:00,448 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 17:20:00,450 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 17:20:00,450 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 17:20:00,453 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 17:20:00,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.02 05:19:59" (1/3) ... [2021-02-19 17:20:00,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54f43b74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 05:20:00, skipping insertion in model container [2021-02-19 17:20:00,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:19:59" (2/3) ... [2021-02-19 17:20:00,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54f43b74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 05:20:00, skipping insertion in model container [2021-02-19 17:20:00,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:20:00" (3/3) ... [2021-02-19 17:20:00,457 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1231b.c [2021-02-19 17:20:00,463 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 17:20:00,469 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 17:20:00,487 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-19 17:20:00,515 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 17:20:00,515 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 17:20:00,515 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 17:20:00,515 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 17:20:00,516 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 17:20:00,516 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 17:20:00,516 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 17:20:00,516 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 17:20:00,534 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2021-02-19 17:20:00,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 17:20:00,541 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:20:00,542 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] [2021-02-19 17:20:00,542 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:20:00,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:00,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1624734879, now seen corresponding path program 1 times [2021-02-19 17:20:00,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:00,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086809657] [2021-02-19 17:20:00,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:00,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:00,872 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:20:00,874 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:20:00,876 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:20:00,877 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:20:00,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:20:00,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:01,001 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:20:01,002 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:20:01,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-02-19 17:20:01,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:01,018 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:20:01,020 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:20:01,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-19 17:20:01,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:01,090 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:20:01,091 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:20:01,093 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:20:01,095 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:20:01,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-02-19 17:20:01,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:01,107 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:20:01,108 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:20:01,109 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:20:01,110 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:20:01,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:20:01,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086809657] [2021-02-19 17:20:01,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:20:01,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:20:01,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408449413] [2021-02-19 17:20:01,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:20:01,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:01,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:20:01,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:20:01,153 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 4 states. [2021-02-19 17:20:01,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:01,487 INFO L93 Difference]: Finished difference Result 72 states and 94 transitions. [2021-02-19 17:20:01,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 17:20:01,489 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2021-02-19 17:20:01,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:01,498 INFO L225 Difference]: With dead ends: 72 [2021-02-19 17:20:01,499 INFO L226 Difference]: Without dead ends: 37 [2021-02-19 17:20:01,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:20:01,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-02-19 17:20:01,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-02-19 17:20:01,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-02-19 17:20:01,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2021-02-19 17:20:01,552 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 27 [2021-02-19 17:20:01,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:01,553 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2021-02-19 17:20:01,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:20:01,553 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2021-02-19 17:20:01,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 17:20:01,555 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:20:01,556 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] [2021-02-19 17:20:01,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 17:20:01,556 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:20:01,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:01,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1818564187, now seen corresponding path program 1 times [2021-02-19 17:20:01,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:01,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552703512] [2021-02-19 17:20:01,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:01,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:01,624 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:20:01,625 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:20:01,626 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:20:01,626 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:20:01,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:20:01,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:01,691 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:20:01,692 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:20:01,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-02-19 17:20:01,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:01,698 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:20:01,699 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:20:01,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-19 17:20:01,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:01,742 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:20:01,743 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:20:01,744 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:20:01,745 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:20:01,756 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:20:01,757 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:20:01,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-02-19 17:20:01,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:01,775 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:20:01,776 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:20:01,777 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:20:01,778 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:20:01,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:20:01,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552703512] [2021-02-19 17:20:01,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:20:01,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-19 17:20:01,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671386333] [2021-02-19 17:20:01,796 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 17:20:01,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:01,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 17:20:01,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-19 17:20:01,798 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand 6 states. [2021-02-19 17:20:02,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:02,074 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2021-02-19 17:20:02,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:20:02,075 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2021-02-19 17:20:02,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:02,078 INFO L225 Difference]: With dead ends: 47 [2021-02-19 17:20:02,078 INFO L226 Difference]: Without dead ends: 41 [2021-02-19 17:20:02,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:20:02,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-02-19 17:20:02,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-02-19 17:20:02,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-02-19 17:20:02,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-02-19 17:20:02,094 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 28 [2021-02-19 17:20:02,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:02,094 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-02-19 17:20:02,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-19 17:20:02,095 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-02-19 17:20:02,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 17:20:02,096 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:20:02,096 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:02,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 17:20:02,097 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:20:02,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:02,097 INFO L82 PathProgramCache]: Analyzing trace with hash -841214374, now seen corresponding path program 1 times [2021-02-19 17:20:02,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:02,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335252011] [2021-02-19 17:20:02,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:02,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:02,139 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:20:02,140 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:20:02,141 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:20:02,142 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:20:02,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:20:02,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:02,201 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:20:02,202 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:20:02,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-02-19 17:20:02,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:02,207 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:20:02,208 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:20:02,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-19 17:20:02,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:02,252 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:20:02,252 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:20:02,254 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:20:02,255 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:20:02,267 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:20:02,268 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:20:02,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-02-19 17:20:02,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:02,292 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:20:02,294 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:20:02,296 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:20:02,297 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:20:02,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:20:02,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335252011] [2021-02-19 17:20:02,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:20:02,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-19 17:20:02,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069256079] [2021-02-19 17:20:02,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 17:20:02,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:02,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 17:20:02,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-19 17:20:02,321 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 6 states. [2021-02-19 17:20:02,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:02,661 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2021-02-19 17:20:02,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:20:02,662 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2021-02-19 17:20:02,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:02,664 INFO L225 Difference]: With dead ends: 51 [2021-02-19 17:20:02,664 INFO L226 Difference]: Without dead ends: 45 [2021-02-19 17:20:02,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:20:02,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-02-19 17:20:02,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2021-02-19 17:20:02,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-02-19 17:20:02,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-02-19 17:20:02,676 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 31 [2021-02-19 17:20:02,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:02,676 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-02-19 17:20:02,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-19 17:20:02,676 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-02-19 17:20:02,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 17:20:02,678 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:20:02,678 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:02,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-19 17:20:02,678 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:20:02,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:02,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1037727879, now seen corresponding path program 1 times [2021-02-19 17:20:02,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:02,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804924626] [2021-02-19 17:20:02,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:02,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-19 17:20:02,712 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-19 17:20:02,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-19 17:20:02,737 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-19 17:20:02,769 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-02-19 17:20:02,770 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-19 17:20:02,770 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-19 17:20:02,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 05:20:02 BoogieIcfgContainer [2021-02-19 17:20:02,810 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 17:20:02,812 INFO L168 Benchmark]: Toolchain (without parser) took 3437.34 ms. Allocated memory was 159.4 MB in the beginning and 202.4 MB in the end (delta: 43.0 MB). Free memory was 133.7 MB in the beginning and 129.8 MB in the end (delta: 3.9 MB). Peak memory consumption was 48.6 MB. Max. memory is 8.0 GB. [2021-02-19 17:20:02,813 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 159.4 MB. Free memory is still 130.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-19 17:20:02,814 INFO L168 Benchmark]: CACSL2BoogieTranslator took 355.95 ms. Allocated memory is still 159.4 MB. Free memory was 132.6 MB in the beginning and 122.4 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-19 17:20:02,814 INFO L168 Benchmark]: Boogie Preprocessor took 47.22 ms. Allocated memory is still 159.4 MB. Free memory was 122.4 MB in the beginning and 120.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-19 17:20:02,815 INFO L168 Benchmark]: RCFGBuilder took 650.62 ms. Allocated memory is still 159.4 MB. Free memory was 120.5 MB in the beginning and 137.1 MB in the end (delta: -16.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 8.0 GB. [2021-02-19 17:20:02,816 INFO L168 Benchmark]: TraceAbstraction took 2360.85 ms. Allocated memory was 159.4 MB in the beginning and 202.4 MB in the end (delta: 43.0 MB). Free memory was 136.6 MB in the beginning and 129.8 MB in the end (delta: 6.8 MB). Peak memory consumption was 49.8 MB. Max. memory is 8.0 GB. [2021-02-19 17:20:02,820 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 159.4 MB. Free memory is still 130.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 355.95 ms. Allocated memory is still 159.4 MB. Free memory was 132.6 MB in the beginning and 122.4 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 47.22 ms. Allocated memory is still 159.4 MB. Free memory was 122.4 MB in the beginning and 120.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 650.62 ms. Allocated memory is still 159.4 MB. Free memory was 120.5 MB in the beginning and 137.1 MB in the end (delta: -16.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2360.85 ms. Allocated memory was 159.4 MB in the beginning and 202.4 MB in the end (delta: 43.0 MB). Free memory was 136.6 MB in the beginning and 129.8 MB in the end (delta: 6.8 MB). Peak memory consumption was 49.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 70]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 69, overapproximation of someBinaryArithmeticDOUBLEoperation at line 63. Possible FailurePath: [L62] double x = __VERIFIER_nondet_double(); [L63] double y = 0.0 / 0.0; VAL [x=4294967302] [L64] CALL, EXPR isnan_double(x) VAL [\old(x)=4294967302] [L18] return x != x; VAL [\old(x)=4294967302, \result=0, x=4294967302] [L64] RET, EXPR isnan_double(x) VAL [isnan_double(x)=0, x=4294967302] [L64] COND TRUE !isnan_double(x) [L66] CALL, EXPR fmin_double(x, y) VAL [\old(x)=4294967302, \old(y)=4294967301] [L47] CALL, EXPR __fpclassify_double(x) VAL [\old(x)=4294967302] [L20] __uint32_t msw, lsw; VAL [\old(x)=4294967302, x=4294967302] [L23] ieee_double_shape_type ew_u; [L24] ew_u.value = (x) [L25] EXPR ew_u.parts.msw [L25] (msw) = ew_u.parts.msw [L26] EXPR ew_u.parts.lsw [L26] (lsw) = ew_u.parts.lsw [L29-L30] COND FALSE !((msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000)) VAL [\old(x)=4294967302, lsw=4294967297, msw=4293918721, x=4294967302] [L32-L33] COND FALSE !((msw >= 0x00100000 && msw <= 0x7fefffff) || (msw >= 0x80100000 && msw <= 0xffefffff)) VAL [\old(x)=4294967302, lsw=4294967297, msw=4293918721, x=4294967302] [L35-L36] COND FALSE !(( msw <= 0x000fffff) || (msw >= 0x80000000 && msw <= 0x800fffff)) VAL [\old(x)=4294967302, lsw=4294967297, msw=4293918721, x=4294967302] [L39-L40] COND FALSE !((msw == 0x7ff00000 && lsw == 0x00000000) || (msw == 0xfff00000 && lsw == 0x00000000)) [L43] return 0; VAL [\old(x)=4294967302, \result=0, lsw=4294967297, msw=4293918721, x=4294967302] [L47] RET, EXPR __fpclassify_double(x) VAL [\old(x)=4294967302, \old(y)=4294967301, __fpclassify_double(x)=0, x=4294967302, y=4294967301] [L47] COND TRUE __fpclassify_double(x) == 0 [L48] return y; VAL [\old(x)=4294967302, \old(y)=4294967301, \result=4294967301, x=4294967302, y=4294967301] [L66] RET, EXPR fmin_double(x, y) VAL [fmin_double(x, y)=4294967301, x=4294967302, y=4294967301] [L66] double res = fmin_double(x, y); [L69] COND TRUE res != x VAL [res=4294967301, x=4294967302, y=4294967301] [L70] reach_error() VAL [res=4294967301, x=4294967302, y=4294967301] - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 45 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.2s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 125 SDtfs, 48 SDslu, 201 SDs, 0 SdLazy, 171 SolverSat, 38 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 4 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 117 NumberOfCodeBlocks, 117 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 83 ConstructedInterpolants, 0 QuantifiedInterpolants, 7243 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...