/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-benchs/inv_square_int.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 15:46:12,407 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 15:46:12,410 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 15:46:12,462 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-21 15:46:12,490 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 15:46:12,493 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 15:46:12,495 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 15:46:12,497 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 15:46:12,500 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 15:46:12,501 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 15:46:12,508 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 15:46:12,515 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 15:46:12,517 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 15:46:12,519 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 15:46:12,521 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 15:46:12,523 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 15:46:12,531 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 15:46:12,543 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 15:46:12,544 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 15:46:12,544 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 15:46:12,549 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 [2021-02-21 15:46:12,619 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 15:46:12,620 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 15:46:12,624 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-21 15:46:12,625 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-21 15:46:12,625 INFO L138 SettingsManager]: * Use SBE=true [2021-02-21 15:46:12,625 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 15:46:12,625 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 15:46:12,626 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 15:46:12,626 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 15:46:12,626 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 15:46:12,627 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 15:46:12,628 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 15:46:12,628 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 15:46:12,628 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 15:46:12,628 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 15:46:12,628 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 15:46:12,629 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 15:46:12,629 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 15:46:12,629 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-21 15:46:12,629 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 15:46:12,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 15:46:12,630 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 15:46:12,630 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-21 15:46:12,630 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-21 15:46:12,631 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-21 15:46:12,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-21 15:46:12,631 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 15:46:12,631 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-21 15:46:12,631 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 15:46:13,031 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 15:46:13,061 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 15:46:13,064 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 15:46:13,066 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 15:46:13,067 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 15:46:13,068 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/inv_square_int.c [2021-02-21 15:46:13,151 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7da8da14/c55bd2728db94e1eb9efc4f1b0f7a8c9/FLAG81190ceaa [2021-02-21 15:46:13,747 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 15:46:13,748 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/inv_square_int.c [2021-02-21 15:46:13,755 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7da8da14/c55bd2728db94e1eb9efc4f1b0f7a8c9/FLAG81190ceaa [2021-02-21 15:46:14,114 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7da8da14/c55bd2728db94e1eb9efc4f1b0f7a8c9 [2021-02-21 15:46:14,117 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 15:46:14,131 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 15:46:14,137 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 15:46:14,138 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 15:46:14,142 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 15:46:14,143 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 03:46:14" (1/1) ... [2021-02-21 15:46:14,145 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@513dbdb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:46:14, skipping insertion in model container [2021-02-21 15:46:14,146 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 03:46:14" (1/1) ... [2021-02-21 15:46:14,154 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 15:46:14,170 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 15:46:14,329 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-benchs/inv_square_int.c[482,495] [2021-02-21 15:46:14,342 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 15:46:14,353 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 15:46:14,369 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-benchs/inv_square_int.c[482,495] [2021-02-21 15:46:14,372 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 15:46:14,391 INFO L208 MainTranslator]: Completed translation [2021-02-21 15:46:14,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:46:14 WrapperNode [2021-02-21 15:46:14,392 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 15:46:14,393 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 15:46:14,394 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 15:46:14,394 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 15:46:14,409 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:46:14" (1/1) ... [2021-02-21 15:46:14,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:46:14" (1/1) ... [2021-02-21 15:46:14,418 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:46:14" (1/1) ... [2021-02-21 15:46:14,418 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:46:14" (1/1) ... [2021-02-21 15:46:14,426 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:46:14" (1/1) ... [2021-02-21 15:46:14,428 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:46:14" (1/1) ... [2021-02-21 15:46:14,429 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:46:14" (1/1) ... [2021-02-21 15:46:14,432 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 15:46:14,433 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 15:46:14,433 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 15:46:14,433 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 15:46:14,434 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:46:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 15:46:14,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 15:46:14,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 15:46:14,558 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 15:46:14,558 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-21 15:46:14,558 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-21 15:46:14,559 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 15:46:14,559 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 15:46:14,559 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 15:46:14,559 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 15:46:14,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 15:46:14,560 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 15:46:14,560 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-21 15:46:14,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-21 15:46:14,562 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 15:46:14,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 15:46:14,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 15:46:14,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 15:46:14,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 15:46:14,565 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 15:46:14,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 15:46:14,945 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 15:46:14,945 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-21 15:46:14,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 03:46:14 BoogieIcfgContainer [2021-02-21 15:46:14,947 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 15:46:14,949 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 15:46:14,949 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 15:46:14,954 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 15:46:14,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 03:46:14" (1/3) ... [2021-02-21 15:46:14,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eb966e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 03:46:14, skipping insertion in model container [2021-02-21 15:46:14,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:46:14" (2/3) ... [2021-02-21 15:46:14,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eb966e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 03:46:14, skipping insertion in model container [2021-02-21 15:46:14,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 03:46:14" (3/3) ... [2021-02-21 15:46:14,958 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_square_int.c [2021-02-21 15:46:14,965 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-21 15:46:14,970 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 15:46:14,992 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 15:46:15,026 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 15:46:15,026 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 15:46:15,026 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-21 15:46:15,026 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 15:46:15,027 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 15:46:15,027 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 15:46:15,027 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 15:46:15,027 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 15:46:15,070 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2021-02-21 15:46:15,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-21 15:46:15,085 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 15:46:15,086 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 15:46:15,087 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 15:46:15,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 15:46:15,094 INFO L82 PathProgramCache]: Analyzing trace with hash -484878901, now seen corresponding path program 1 times [2021-02-21 15:46:15,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 15:46:15,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015648760] [2021-02-21 15:46:15,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 15:46:15,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 15:46:15,325 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:46:15,327 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:46:15,328 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:46:15,329 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:46:15,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 15:46:15,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 15:46:15,420 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:46:15,421 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:46:15,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-02-21 15:46:15,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 15:46:15,428 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:46:15,429 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:46:15,430 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:46:15,431 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:46:15,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 15:46:15,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015648760] [2021-02-21 15:46:15,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 15:46:15,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-21 15:46:15,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987876595] [2021-02-21 15:46:15,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-21 15:46:15,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 15:46:15,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-21 15:46:15,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-21 15:46:15,459 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2021-02-21 15:46:15,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 15:46:15,537 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2021-02-21 15:46:15,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-21 15:46:15,539 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2021-02-21 15:46:15,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 15:46:15,548 INFO L225 Difference]: With dead ends: 39 [2021-02-21 15:46:15,548 INFO L226 Difference]: Without dead ends: 17 [2021-02-21 15:46:15,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-21 15:46:15,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-02-21 15:46:15,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-02-21 15:46:15,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-02-21 15:46:15,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 16 transitions. [2021-02-21 15:46:15,595 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 16 transitions. Word has length 16 [2021-02-21 15:46:15,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 15:46:15,596 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 16 transitions. [2021-02-21 15:46:15,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-21 15:46:15,597 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 16 transitions. [2021-02-21 15:46:15,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-21 15:46:15,597 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 15:46:15,598 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 15:46:15,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 15:46:15,598 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 15:46:15,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 15:46:15,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1294225527, now seen corresponding path program 1 times [2021-02-21 15:46:15,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 15:46:15,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058745320] [2021-02-21 15:46:15,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 15:46:15,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 15:46:15,641 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 15:46:15,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 15:46:15,663 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 15:46:15,695 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-02-21 15:46:15,695 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 15:46:15,697 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 15:46:15,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 03:46:15 BoogieIcfgContainer [2021-02-21 15:46:15,738 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 15:46:15,740 INFO L168 Benchmark]: Toolchain (without parser) took 1620.22 ms. Allocated memory is still 156.2 MB. Free memory was 131.5 MB in the beginning and 73.1 MB in the end (delta: 58.3 MB). Peak memory consumption was 58.7 MB. Max. memory is 8.0 GB. [2021-02-21 15:46:15,740 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 156.2 MB. Free memory is still 131.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 15:46:15,742 INFO L168 Benchmark]: CACSL2BoogieTranslator took 255.22 ms. Allocated memory is still 156.2 MB. Free memory was 130.4 MB in the beginning and 120.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-21 15:46:15,743 INFO L168 Benchmark]: Boogie Preprocessor took 38.20 ms. Allocated memory is still 156.2 MB. Free memory was 120.7 MB in the beginning and 119.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-21 15:46:15,744 INFO L168 Benchmark]: RCFGBuilder took 514.56 ms. Allocated memory is still 156.2 MB. Free memory was 119.3 MB in the beginning and 105.7 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-02-21 15:46:15,745 INFO L168 Benchmark]: TraceAbstraction took 788.89 ms. Allocated memory is still 156.2 MB. Free memory was 105.3 MB in the beginning and 73.1 MB in the end (delta: 32.1 MB). Peak memory consumption was 32.5 MB. Max. memory is 8.0 GB. [2021-02-21 15:46:15,748 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 156.2 MB. Free memory is still 131.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 255.22 ms. Allocated memory is still 156.2 MB. Free memory was 130.4 MB in the beginning and 120.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.20 ms. Allocated memory is still 156.2 MB. Free memory was 120.7 MB in the beginning and 119.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 514.56 ms. Allocated memory is still 156.2 MB. Free memory was 119.3 MB in the beginning and 105.7 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 788.89 ms. Allocated memory is still 156.2 MB. Free memory was 105.3 MB in the beginning and 73.1 MB in the end (delta: 32.1 MB). Peak memory consumption was 32.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 24, overapproximation of someBinaryArithmeticFLOAToperation at line 23. Possible FailurePath: [L17] int x; [L18] float y, z; [L20] x = __VERIFIER_nondet_int() [L21] CALL assume_abort_if_not(x >= -10 && x <= 10) VAL [\old(cond)=1] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L21] RET assume_abort_if_not(x >= -10 && x <= 10) VAL [x=0] [L23] y = x*x - 2.f VAL [x=0] [L24] CALL __VERIFIER_assert(y != 0.f) VAL [\old(cond)=0] [L13] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L13] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 20 SDtfs, 12 SDslu, 3 SDs, 0 SdLazy, 5 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 32 NumberOfCodeBlocks, 32 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 15 ConstructedInterpolants, 0 QuantifiedInterpolants, 675 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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...