/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/bitvector/soft_float_4-3a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 21:58:23,311 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 21:58:23,314 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 21:58:23,366 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 21:58:23,366 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 21:58:23,368 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 21:58:23,370 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 21:58:23,372 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 21:58:23,375 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 21:58:23,376 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 21:58:23,378 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 21:58:23,380 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 21:58:23,380 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 21:58:23,382 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 21:58:23,383 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 21:58:23,385 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 21:58:23,386 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 21:58:23,387 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 21:58:23,416 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 21:58:23,423 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 21:58:23,429 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 21:58:23,438 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 21:58:23,439 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 21:58:23,444 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 21:58:23,452 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-06 21:58:23,453 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-06 21:58:23,453 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-06 21:58:23,455 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-06 21:58:23,460 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-06 21:58:23,463 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-06 21:58:23,463 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-06 21:58:23,464 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-06 21:58:23,465 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-06 21:58:23,467 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-06 21:58:23,468 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-06 21:58:23,468 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-06 21:58:23,469 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-06 21:58:23,470 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-06 21:58:23,470 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 21:58:23,471 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 21:58:23,472 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 21:58:23,473 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 [2020-11-06 21:58:23,502 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 21:58:23,502 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 21:58:23,504 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 21:58:23,504 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 21:58:23,505 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 21:58:23,505 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 21:58:23,505 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 21:58:23,506 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 21:58:23,506 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 21:58:23,506 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 21:58:23,507 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 21:58:23,507 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 21:58:23,507 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 21:58:23,507 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 21:58:23,508 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 21:58:23,508 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 21:58:23,508 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 21:58:23,509 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 21:58:23,509 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 21:58:23,509 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 21:58:23,509 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 21:58:23,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 21:58:23,510 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 21:58:23,510 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 21:58:23,511 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 21:58:23,511 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 21:58:23,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 21:58:23,511 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 21:58:23,512 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 21:58:23,512 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 21:58:23,933 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 21:58:23,970 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 21:58:23,973 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 21:58:23,974 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 21:58:23,975 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 21:58:23,976 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_4-3a.c.cil.c [2020-11-06 21:58:24,058 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/291305ede/267eac939b35470c8aa40b2d2e0ae6a0/FLAGef28e3ca0 [2020-11-06 21:58:24,764 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 21:58:24,765 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_4-3a.c.cil.c [2020-11-06 21:58:24,781 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/291305ede/267eac939b35470c8aa40b2d2e0ae6a0/FLAGef28e3ca0 [2020-11-06 21:58:25,084 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/291305ede/267eac939b35470c8aa40b2d2e0ae6a0 [2020-11-06 21:58:25,089 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 21:58:25,099 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 21:58:25,102 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 21:58:25,103 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 21:58:25,107 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 21:58:25,108 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:58:25" (1/1) ... [2020-11-06 21:58:25,112 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bceddfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:25, skipping insertion in model container [2020-11-06 21:58:25,112 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:58:25" (1/1) ... [2020-11-06 21:58:25,121 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 21:58:25,169 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 21:58:25,434 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 21:58:25,445 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 21:58:25,491 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 21:58:25,508 INFO L208 MainTranslator]: Completed translation [2020-11-06 21:58:25,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:25 WrapperNode [2020-11-06 21:58:25,509 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 21:58:25,510 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 21:58:25,510 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 21:58:25,510 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 21:58:25,560 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:25" (1/1) ... [2020-11-06 21:58:25,563 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:25" (1/1) ... [2020-11-06 21:58:25,588 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:25" (1/1) ... [2020-11-06 21:58:25,589 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:25" (1/1) ... [2020-11-06 21:58:25,611 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:25" (1/1) ... [2020-11-06 21:58:25,625 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:25" (1/1) ... [2020-11-06 21:58:25,628 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:25" (1/1) ... [2020-11-06 21:58:25,632 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 21:58:25,633 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 21:58:25,633 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 21:58:25,633 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 21:58:25,634 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:25" (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 [2020-11-06 21:58:25,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 21:58:25,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 21:58:25,725 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 21:58:25,725 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-06 21:58:25,726 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-11-06 21:58:25,726 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-11-06 21:58:25,726 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-11-06 21:58:25,726 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 21:58:25,727 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 21:58:25,727 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 21:58:25,728 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 21:58:25,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 21:58:25,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-11-06 21:58:25,729 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-11-06 21:58:25,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-06 21:58:25,730 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-11-06 21:58:25,731 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-11-06 21:58:25,731 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-11-06 21:58:25,731 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 21:58:25,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 21:58:25,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 21:58:25,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 21:58:25,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 21:58:25,732 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 21:58:25,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 21:58:26,549 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 21:58:26,550 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-11-06 21:58:26,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:58:26 BoogieIcfgContainer [2020-11-06 21:58:26,553 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 21:58:26,558 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 21:58:26,558 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 21:58:26,562 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 21:58:26,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:58:25" (1/3) ... [2020-11-06 21:58:26,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5727cda5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:58:26, skipping insertion in model container [2020-11-06 21:58:26,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:25" (2/3) ... [2020-11-06 21:58:26,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5727cda5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:58:26, skipping insertion in model container [2020-11-06 21:58:26,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:58:26" (3/3) ... [2020-11-06 21:58:26,568 INFO L111 eAbstractionObserver]: Analyzing ICFG soft_float_4-3a.c.cil.c [2020-11-06 21:58:26,585 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 21:58:26,589 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 21:58:26,607 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 21:58:26,659 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 21:58:26,659 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 21:58:26,659 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 21:58:26,659 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 21:58:26,660 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 21:58:26,660 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 21:58:26,660 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 21:58:26,660 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 21:58:26,684 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-11-06 21:58:26,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-06 21:58:26,694 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:58:26,696 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 21:58:26,696 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:58:26,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:58:26,706 INFO L82 PathProgramCache]: Analyzing trace with hash 946069334, now seen corresponding path program 1 times [2020-11-06 21:58:26,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:58:26,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554934292] [2020-11-06 21:58:26,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:58:26,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:27,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:58:27,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:27,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 21:58:27,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:27,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-06 21:58:27,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:27,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-06 21:58:27,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:27,258 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-06 21:58:27,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554934292] [2020-11-06 21:58:27,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070413082] [2020-11-06 21:58:27,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 21:58:27,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:27,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-06 21:58:27,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 21:58:27,493 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-06 21:58:27,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-06 21:58:27,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 13 [2020-11-06 21:58:27,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233862098] [2020-11-06 21:58:27,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-06 21:58:27,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:58:27,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-06 21:58:27,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-11-06 21:58:27,520 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 8 states. [2020-11-06 21:58:27,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:58:27,681 INFO L93 Difference]: Finished difference Result 137 states and 203 transitions. [2020-11-06 21:58:27,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-06 21:58:27,683 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-11-06 21:58:27,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:58:27,696 INFO L225 Difference]: With dead ends: 137 [2020-11-06 21:58:27,696 INFO L226 Difference]: Without dead ends: 73 [2020-11-06 21:58:27,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-11-06 21:58:27,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-11-06 21:58:27,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 66. [2020-11-06 21:58:27,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-06 21:58:27,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 86 transitions. [2020-11-06 21:58:27,758 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 86 transitions. Word has length 36 [2020-11-06 21:58:27,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:58:27,759 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 86 transitions. [2020-11-06 21:58:27,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-06 21:58:27,759 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 86 transitions. [2020-11-06 21:58:27,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-06 21:58:27,762 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:58:27,762 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-11-06 21:58:27,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-11-06 21:58:27,976 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:58:27,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:58:27,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1142375291, now seen corresponding path program 1 times [2020-11-06 21:58:27,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:58:27,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516951405] [2020-11-06 21:58:27,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:58:28,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:28,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:58:28,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:28,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 21:58:28,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:28,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-06 21:58:28,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:28,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-06 21:58:28,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:28,278 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-06 21:58:28,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516951405] [2020-11-06 21:58:28,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095897189] [2020-11-06 21:58:28,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 21:58:28,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:28,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-06 21:58:28,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 21:58:28,415 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-06 21:58:28,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 21:58:28,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2020-11-06 21:58:28,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081209705] [2020-11-06 21:58:28,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-06 21:58:28,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:58:28,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-06 21:58:28,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-11-06 21:58:28,420 INFO L87 Difference]: Start difference. First operand 66 states and 86 transitions. Second operand 10 states. [2020-11-06 21:58:29,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:58:29,433 INFO L93 Difference]: Finished difference Result 133 states and 177 transitions. [2020-11-06 21:58:29,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-06 21:58:29,433 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-11-06 21:58:29,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:58:29,436 INFO L225 Difference]: With dead ends: 133 [2020-11-06 21:58:29,436 INFO L226 Difference]: Without dead ends: 104 [2020-11-06 21:58:29,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-11-06 21:58:29,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-11-06 21:58:29,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 86. [2020-11-06 21:58:29,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-11-06 21:58:29,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 116 transitions. [2020-11-06 21:58:29,461 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 116 transitions. Word has length 40 [2020-11-06 21:58:29,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:58:29,461 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 116 transitions. [2020-11-06 21:58:29,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-06 21:58:29,462 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 116 transitions. [2020-11-06 21:58:29,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-06 21:58:29,464 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:58:29,464 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-11-06 21:58:29,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 21:58:29,680 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:58:29,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:58:29,681 INFO L82 PathProgramCache]: Analyzing trace with hash 632632071, now seen corresponding path program 1 times [2020-11-06 21:58:29,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:58:29,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748802529] [2020-11-06 21:58:29,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:58:29,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:29,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:58:29,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:29,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 21:58:29,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:29,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-06 21:58:29,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:29,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-06 21:58:29,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:29,879 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-06 21:58:29,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748802529] [2020-11-06 21:58:29,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835760007] [2020-11-06 21:58:29,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 21:58:29,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:29,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-06 21:58:29,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 21:58:30,048 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-06 21:58:30,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 21:58:30,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2020-11-06 21:58:30,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851548733] [2020-11-06 21:58:30,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-06 21:58:30,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:58:30,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-06 21:58:30,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-11-06 21:58:30,051 INFO L87 Difference]: Start difference. First operand 86 states and 116 transitions. Second operand 10 states. [2020-11-06 21:58:31,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:58:31,138 INFO L93 Difference]: Finished difference Result 139 states and 183 transitions. [2020-11-06 21:58:31,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-06 21:58:31,139 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-11-06 21:58:31,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:58:31,141 INFO L225 Difference]: With dead ends: 139 [2020-11-06 21:58:31,141 INFO L226 Difference]: Without dead ends: 98 [2020-11-06 21:58:31,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2020-11-06 21:58:31,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-06 21:58:31,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 76. [2020-11-06 21:58:31,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-11-06 21:58:31,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 99 transitions. [2020-11-06 21:58:31,163 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 99 transitions. Word has length 40 [2020-11-06 21:58:31,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:58:31,164 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 99 transitions. [2020-11-06 21:58:31,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-06 21:58:31,164 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 99 transitions. [2020-11-06 21:58:31,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-06 21:58:31,166 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:58:31,166 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] [2020-11-06 21:58:31,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 21:58:31,381 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:58:31,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:58:31,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1415950796, now seen corresponding path program 1 times [2020-11-06 21:58:31,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:58:31,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146941494] [2020-11-06 21:58:31,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:58:31,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:31,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:58:31,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:31,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 21:58:31,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:31,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-06 21:58:31,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:31,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-06 21:58:31,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:31,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-11-06 21:58:31,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:31,640 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-06 21:58:31,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146941494] [2020-11-06 21:58:31,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 21:58:31,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-11-06 21:58:31,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857523097] [2020-11-06 21:58:31,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-06 21:58:31,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:58:31,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-06 21:58:31,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-11-06 21:58:31,643 INFO L87 Difference]: Start difference. First operand 76 states and 99 transitions. Second operand 10 states. [2020-11-06 21:58:32,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:58:32,602 INFO L93 Difference]: Finished difference Result 126 states and 167 transitions. [2020-11-06 21:58:32,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-06 21:58:32,602 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 44 [2020-11-06 21:58:32,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:58:32,607 INFO L225 Difference]: With dead ends: 126 [2020-11-06 21:58:32,608 INFO L226 Difference]: Without dead ends: 102 [2020-11-06 21:58:32,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-11-06 21:58:32,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-11-06 21:58:32,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 94. [2020-11-06 21:58:32,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-11-06 21:58:32,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 125 transitions. [2020-11-06 21:58:32,652 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 125 transitions. Word has length 44 [2020-11-06 21:58:32,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:58:32,652 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 125 transitions. [2020-11-06 21:58:32,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-06 21:58:32,652 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 125 transitions. [2020-11-06 21:58:32,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-06 21:58:32,661 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:58:32,661 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2020-11-06 21:58:32,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-06 21:58:32,662 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:58:32,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:58:32,664 INFO L82 PathProgramCache]: Analyzing trace with hash 359056566, now seen corresponding path program 1 times [2020-11-06 21:58:32,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:58:32,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340759996] [2020-11-06 21:58:32,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:58:32,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:32,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:58:32,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:32,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 21:58:32,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:32,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-06 21:58:32,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:32,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-06 21:58:32,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:32,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-11-06 21:58:32,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:32,915 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-06 21:58:32,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340759996] [2020-11-06 21:58:32,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890464444] [2020-11-06 21:58:32,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 21:58:32,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:32,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-06 21:58:33,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 21:58:33,188 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-06 21:58:33,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-06 21:58:33,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 14 [2020-11-06 21:58:33,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177520916] [2020-11-06 21:58:33,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-06 21:58:33,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:58:33,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-06 21:58:33,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-11-06 21:58:33,191 INFO L87 Difference]: Start difference. First operand 94 states and 125 transitions. Second operand 9 states. [2020-11-06 21:58:33,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:58:33,425 INFO L93 Difference]: Finished difference Result 120 states and 155 transitions. [2020-11-06 21:58:33,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-06 21:58:33,426 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 44 [2020-11-06 21:58:33,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:58:33,428 INFO L225 Difference]: With dead ends: 120 [2020-11-06 21:58:33,428 INFO L226 Difference]: Without dead ends: 96 [2020-11-06 21:58:33,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2020-11-06 21:58:33,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-11-06 21:58:33,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 84. [2020-11-06 21:58:33,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-11-06 21:58:33,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 108 transitions. [2020-11-06 21:58:33,465 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 108 transitions. Word has length 44 [2020-11-06 21:58:33,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:58:33,469 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 108 transitions. [2020-11-06 21:58:33,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-06 21:58:33,469 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 108 transitions. [2020-11-06 21:58:33,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-06 21:58:33,471 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:58:33,471 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 21:58:33,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 21:58:33,672 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:58:33,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:58:33,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1058425354, now seen corresponding path program 2 times [2020-11-06 21:58:33,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:58:33,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890190451] [2020-11-06 21:58:33,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:58:33,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:33,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:58:33,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:33,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 21:58:33,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:33,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-06 21:58:33,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:33,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-11-06 21:58:33,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:33,974 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-11-06 21:58:33,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890190451] [2020-11-06 21:58:33,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774734662] [2020-11-06 21:58:33,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 21:58:34,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 21:58:34,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 21:58:34,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-06 21:58:34,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 21:58:34,204 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-11-06 21:58:34,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 21:58:34,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2020-11-06 21:58:34,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210628329] [2020-11-06 21:58:34,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-06 21:58:34,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:58:34,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-06 21:58:34,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-11-06 21:58:34,210 INFO L87 Difference]: Start difference. First operand 84 states and 108 transitions. Second operand 9 states. [2020-11-06 21:58:35,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:58:35,193 INFO L93 Difference]: Finished difference Result 152 states and 204 transitions. [2020-11-06 21:58:35,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-06 21:58:35,194 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 44 [2020-11-06 21:58:35,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:58:35,197 INFO L225 Difference]: With dead ends: 152 [2020-11-06 21:58:35,197 INFO L226 Difference]: Without dead ends: 123 [2020-11-06 21:58:35,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-11-06 21:58:35,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-11-06 21:58:35,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 106. [2020-11-06 21:58:35,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-11-06 21:58:35,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 143 transitions. [2020-11-06 21:58:35,220 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 143 transitions. Word has length 44 [2020-11-06 21:58:35,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:58:35,220 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 143 transitions. [2020-11-06 21:58:35,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-06 21:58:35,221 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 143 transitions. [2020-11-06 21:58:35,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-06 21:58:35,222 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:58:35,223 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 21:58:35,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-06 21:58:35,437 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:58:35,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:58:35,438 INFO L82 PathProgramCache]: Analyzing trace with hash 716582008, now seen corresponding path program 2 times [2020-11-06 21:58:35,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:58:35,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983346986] [2020-11-06 21:58:35,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:58:35,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:35,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:58:35,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:35,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 21:58:35,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:35,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-06 21:58:35,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:35,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-11-06 21:58:35,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:35,822 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-11-06 21:58:35,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983346986] [2020-11-06 21:58:35,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 21:58:35,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-11-06 21:58:35,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202906760] [2020-11-06 21:58:35,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-06 21:58:35,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:58:35,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-06 21:58:35,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-11-06 21:58:35,833 INFO L87 Difference]: Start difference. First operand 106 states and 143 transitions. Second operand 14 states. [2020-11-06 21:58:37,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:58:37,524 INFO L93 Difference]: Finished difference Result 191 states and 258 transitions. [2020-11-06 21:58:37,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-06 21:58:37,525 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2020-11-06 21:58:37,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:58:37,531 INFO L225 Difference]: With dead ends: 191 [2020-11-06 21:58:37,531 INFO L226 Difference]: Without dead ends: 166 [2020-11-06 21:58:37,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2020-11-06 21:58:37,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-11-06 21:58:37,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 144. [2020-11-06 21:58:37,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-11-06 21:58:37,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 194 transitions. [2020-11-06 21:58:37,597 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 194 transitions. Word has length 44 [2020-11-06 21:58:37,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:58:37,597 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 194 transitions. [2020-11-06 21:58:37,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-06 21:58:37,598 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 194 transitions. [2020-11-06 21:58:37,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-06 21:58:37,600 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:58:37,601 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-11-06 21:58:37,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-06 21:58:37,604 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:58:37,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:58:37,605 INFO L82 PathProgramCache]: Analyzing trace with hash 698333876, now seen corresponding path program 1 times [2020-11-06 21:58:37,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:58:37,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759361245] [2020-11-06 21:58:37,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:58:37,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 21:58:37,656 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 21:58:37,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 21:58:37,683 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 21:58:37,718 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-06 21:58:37,718 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-06 21:58:37,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-06 21:58:37,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 09:58:37 BoogieIcfgContainer [2020-11-06 21:58:37,815 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 21:58:37,820 INFO L168 Benchmark]: Toolchain (without parser) took 12726.39 ms. Allocated memory was 151.0 MB in the beginning and 223.3 MB in the end (delta: 72.4 MB). Free memory was 132.7 MB in the beginning and 183.0 MB in the end (delta: -50.3 MB). Peak memory consumption was 22.4 MB. Max. memory is 8.0 GB. [2020-11-06 21:58:37,821 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 123.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 21:58:37,822 INFO L168 Benchmark]: CACSL2BoogieTranslator took 406.75 ms. Allocated memory is still 151.0 MB. Free memory was 132.2 MB in the beginning and 120.1 MB in the end (delta: 12.1 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-11-06 21:58:37,823 INFO L168 Benchmark]: Boogie Preprocessor took 122.00 ms. Allocated memory is still 151.0 MB. Free memory was 120.1 MB in the beginning and 133.3 MB in the end (delta: -13.2 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. [2020-11-06 21:58:37,824 INFO L168 Benchmark]: RCFGBuilder took 920.72 ms. Allocated memory is still 151.0 MB. Free memory was 133.3 MB in the beginning and 108.1 MB in the end (delta: 25.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 8.0 GB. [2020-11-06 21:58:37,825 INFO L168 Benchmark]: TraceAbstraction took 11256.74 ms. Allocated memory was 151.0 MB in the beginning and 223.3 MB in the end (delta: 72.4 MB). Free memory was 107.4 MB in the beginning and 183.0 MB in the end (delta: -75.6 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 21:58:37,832 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 123.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 406.75 ms. Allocated memory is still 151.0 MB. Free memory was 132.2 MB in the beginning and 120.1 MB in the end (delta: 12.1 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 122.00 ms. Allocated memory is still 151.0 MB. Free memory was 120.1 MB in the beginning and 133.3 MB in the end (delta: -13.2 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. * RCFGBuilder took 920.72 ms. Allocated memory is still 151.0 MB. Free memory was 133.3 MB in the beginning and 108.1 MB in the end (delta: 25.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 11256.74 ms. Allocated memory was 151.0 MB in the beginning and 223.3 MB in the end (delta: 72.4 MB). Free memory was 107.4 MB in the beginning and 183.0 MB in the end (delta: -75.6 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of bitwiseOr at line 102, overapproximation of bitwiseAnd at line 100. Possible FailurePath: [L218] unsigned int a ; [L219] unsigned int ma = __VERIFIER_nondet_uint(); [L220] signed char ea = __VERIFIER_nondet_char(); [L221] unsigned int b ; [L222] unsigned int mb = __VERIFIER_nondet_uint(); [L223] signed char eb = __VERIFIER_nondet_char(); [L224] unsigned int r_add1 ; [L225] unsigned int r_add2 ; [L226] unsigned int zero ; [L227] int tmp ; [L228] int tmp___0 ; [L229] int __retres14 ; VAL [ea=127, eb=0, ma=33554432, mb=16777216] [L233] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m)=0] [L17] unsigned int res ; [L18] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L21] COND TRUE ! m [L22] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0, m=0] [L72] return (__retres4); VAL [\old(e)=0, \old(m)=0, \result=0, __retres4=0, e=0, m=0] [L233] RET, EXPR base2flt(0, 0) VAL [base2flt(0, 0)=0, ea=127, eb=0, ma=33554432, mb=16777216] [L233] zero = base2flt(0, 0) [L234] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=127, \old(m)=33554432] [L17] unsigned int res ; [L18] unsigned int __retres4 ; VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L21] COND FALSE !(! m) VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L27] COND FALSE !(m < 1U << 24U) VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L49] COND TRUE 1 VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L51] COND TRUE m >= 1U << 25U VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L56] COND TRUE e >= 127 [L57] __retres4 = 4294967295U VAL [\old(e)=127, \old(m)=33554432, __retres4=4294967295, e=127, m=33554432] [L72] return (__retres4); VAL [\old(e)=127, \old(m)=33554432, \result=4294967295, __retres4=4294967295, e=127, m=33554432] [L234] RET, EXPR base2flt(ma, ea) VAL [base2flt(ma, ea)=4294967295, ea=127, eb=0, ma=33554432, mb=16777216, zero=0] [L234] a = base2flt(ma, ea) [L235] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=0, \old(m)=16777216] [L17] unsigned int res ; [L18] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L21] COND FALSE !(! m) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L27] COND FALSE !(m < 1U << 24U) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L49] COND TRUE 1 VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L51] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L68] m = m & ~ (1U << 24U) [L69] res = m | ((unsigned int )(e + 128) << 24U) [L70] __retres4 = res VAL [\old(e)=0, \old(m)=16777216, __retres4=1, e=0, res=1] [L72] return (__retres4); VAL [\old(e)=0, \old(m)=16777216, \result=4294967297, __retres4=1, e=0, res=1] [L235] RET, EXPR base2flt(mb, eb) VAL [a=4294967295, base2flt(mb, eb)=4294967297, ea=127, eb=0, ma=33554432, mb=16777216, zero=0] [L235] b = base2flt(mb, eb) [L236] CALL addflt(a, b) VAL [\old(a)=4294967295, \old(b)=1] [L76] unsigned int res ; [L77] unsigned int ma ; [L78] unsigned int mb ; [L79] unsigned int delta ; [L80] int ea ; [L81] int eb ; [L82] unsigned int tmp ; [L83] unsigned int __retres10 ; VAL [\old(a)=4294967295, \old(b)=1, a=4294967295, b=1] [L86] COND FALSE !(a < b) VAL [\old(a)=4294967295, \old(b)=1, a=4294967295, b=1] [L93] COND FALSE !(! b) [L100] ma = a & ((1U << 24U) - 1U) [L101] ea = (int )(a >> 24U) - 128 [L102] ma = ma | (1U << 24U) [L103] mb = b & ((1U << 24U) - 1U) [L104] eb = (int )(b >> 24U) - 128 [L105] mb = mb | (1U << 24U) VAL [\old(a)=4294967295, \old(b)=1, a=4294967295, b=1, ea=127, eb=128] [L106] CALL __VERIFIER_assert(ea >= eb) VAL [\old(cond)=0] [L8] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L9] CALL reach_error() [L3] __assert_fail("0", "soft_float_4-3a.c.cil.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 77 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 11.0s, OverallIterations: 8, TraceHistogramMax: 3, AutomataDifference: 6.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 515 SDtfs, 555 SDslu, 1567 SDs, 0 SdLazy, 3147 SolverSat, 173 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 380 GetRequests, 257 SyntacticMatches, 10 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 3.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=144occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 7 MinimizatonAttempts, 106 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 540 NumberOfCodeBlocks, 540 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 484 ConstructedInterpolants, 0 QuantifiedInterpolants, 51111 SizeOfPredicates, 16 NumberOfNonLiveVariables, 932 ConjunctsInSsa, 71 ConjunctsInUnsatCore, 12 InterpolantComputations, 4 PerfectInterpolantSequences, 177/201 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...