/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/float_int_inv_square.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-19 17:18:50,015 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 17:18:50,017 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 17:18:50,067 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-19 17:18:50,068 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-19 17:18:50,071 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-19 17:18:50,075 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-19 17:18:50,082 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-19 17:18:50,085 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-19 17:18:50,090 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-19 17:18:50,092 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-19 17:18:50,093 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-19 17:18:50,094 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-19 17:18:50,096 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-19 17:18:50,098 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-19 17:18:50,100 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-19 17:18:50,103 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-19 17:18:50,104 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-19 17:18:50,113 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-19 17:18:50,119 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-19 17:18:50,121 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-19 17:18:50,123 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-19 17:18:50,124 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-19 17:18:50,127 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-19 17:18:50,136 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-19 17:18:50,142 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-19 17:18:50,142 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-19 17:18:50,144 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-19 17:18:50,145 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-19 17:18:50,146 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-19 17:18:50,159 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-19 17:18:50,160 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-19 17:18:50,160 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-19 17:18:50,160 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-19 17:18:50,161 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-19 17:18:50,162 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-19 17:18:50,163 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-02-19 17:18:50,218 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 17:18:50,218 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 17:18:50,222 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 17:18:50,222 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 17:18:50,222 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 17:18:50,223 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 17:18:50,223 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 17:18:50,223 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 17:18:50,223 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 17:18:50,224 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 17:18:50,225 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 17:18:50,225 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 17:18:50,225 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 17:18:50,226 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 17:18:50,226 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 17:18:50,226 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 17:18:50,226 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 17:18:50,227 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 17:18:50,227 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 17:18:50,228 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 17:18:50,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 17:18:50,234 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 17:18:50,234 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 17:18:50,234 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 17:18:50,235 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 17:18:50,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 17:18:50,236 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 17:18:50,237 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-19 17:18:50,237 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 17:18:50,628 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 17:18:50,665 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 17:18:50,668 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 17:18:50,670 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-19 17:18:50,671 INFO L275 PluginConnector]: CDTParser initialized [2021-02-19 17:18:50,672 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/float_int_inv_square.c [2021-02-19 17:18:50,759 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0996eacd/34ada0e515cf4a5aa91cd4ee2ea93b6d/FLAG81572d52e [2021-02-19 17:18:51,344 INFO L306 CDTParser]: Found 1 translation units. [2021-02-19 17:18:51,346 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/float_int_inv_square.c [2021-02-19 17:18:51,352 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0996eacd/34ada0e515cf4a5aa91cd4ee2ea93b6d/FLAG81572d52e [2021-02-19 17:18:51,718 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0996eacd/34ada0e515cf4a5aa91cd4ee2ea93b6d [2021-02-19 17:18:51,721 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 17:18:51,735 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 17:18:51,736 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-19 17:18:51,737 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-19 17:18:51,740 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-19 17:18:51,741 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 05:18:51" (1/1) ... [2021-02-19 17:18:51,742 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 19.02 05:18:51, skipping insertion in model container [2021-02-19 17:18:51,743 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 05:18:51" (1/1) ... [2021-02-19 17:18:51,751 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-19 17:18:51,765 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-19 17:18:51,926 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/float_int_inv_square.c[488,501] [2021-02-19 17:18:51,938 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-19 17:18:51,947 INFO L203 MainTranslator]: Completed pre-run [2021-02-19 17:18:51,961 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/float_int_inv_square.c[488,501] [2021-02-19 17:18:51,964 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-19 17:18:51,980 INFO L208 MainTranslator]: Completed translation [2021-02-19 17:18:51,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:18:51 WrapperNode [2021-02-19 17:18:51,981 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-19 17:18:51,982 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 17:18:51,982 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 17:18:51,982 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 17:18:51,994 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:18:51" (1/1) ... [2021-02-19 17:18:51,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:18:51" (1/1) ... [2021-02-19 17:18:52,001 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:18:51" (1/1) ... [2021-02-19 17:18:52,002 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:18:51" (1/1) ... [2021-02-19 17:18:52,009 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:18:51" (1/1) ... [2021-02-19 17:18:52,010 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:18:51" (1/1) ... [2021-02-19 17:18:52,012 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:18:51" (1/1) ... [2021-02-19 17:18:52,014 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 17:18:52,015 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 17:18:52,015 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 17:18:52,015 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 17:18:52,016 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:18:51" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 17:18:52,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-19 17:18:52,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 17:18:52,108 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-19 17:18:52,108 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-19 17:18:52,108 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-19 17:18:52,108 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-19 17:18:52,109 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-19 17:18:52,109 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-19 17:18:52,109 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-19 17:18:52,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-19 17:18:52,110 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-19 17:18:52,110 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-19 17:18:52,111 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-19 17:18:52,111 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-19 17:18:52,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-19 17:18:52,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-19 17:18:52,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 17:18:52,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-19 17:18:52,114 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-19 17:18:52,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-19 17:18:52,421 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 17:18:52,421 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 17:18:52,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:18:52 BoogieIcfgContainer [2021-02-19 17:18:52,423 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 17:18:52,429 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 17:18:52,429 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 17:18:52,442 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 17:18:52,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.02 05:18:51" (1/3) ... [2021-02-19 17:18:52,444 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 19.02 05:18:52, skipping insertion in model container [2021-02-19 17:18:52,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:18:51" (2/3) ... [2021-02-19 17:18:52,445 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 19.02 05:18:52, skipping insertion in model container [2021-02-19 17:18:52,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:18:52" (3/3) ... [2021-02-19 17:18:52,449 INFO L111 eAbstractionObserver]: Analyzing ICFG float_int_inv_square.c [2021-02-19 17:18:52,468 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 17:18:52,480 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 17:18:52,534 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-19 17:18:52,571 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 17:18:52,571 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 17:18:52,571 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 17:18:52,571 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 17:18:52,571 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 17:18:52,572 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 17:18:52,572 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 17:18:52,572 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 17:18:52,590 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2021-02-19 17:18:52,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:18:52,596 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:18:52,597 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:52,597 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:18:52,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:52,607 INFO L82 PathProgramCache]: Analyzing trace with hash -484878901, now seen corresponding path program 1 times [2021-02-19 17:18:52,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:52,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015648760] [2021-02-19 17:18:52,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:52,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:52,945 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:18:52,951 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:18:52,954 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:18:52,955 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:18:53,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:18:53,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:53,063 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:18:53,066 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:18:53,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-02-19 17:18:53,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:53,078 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:18:53,079 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:18:53,080 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:18:53,081 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:18:53,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:18:53,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015648760] [2021-02-19 17:18:53,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:18:53,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 17:18:53,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987876595] [2021-02-19 17:18:53,097 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 17:18:53,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:53,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 17:18:53,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 17:18:53,118 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2021-02-19 17:18:53,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:53,234 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2021-02-19 17:18:53,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 17:18:53,236 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2021-02-19 17:18:53,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:53,244 INFO L225 Difference]: With dead ends: 39 [2021-02-19 17:18:53,244 INFO L226 Difference]: Without dead ends: 17 [2021-02-19 17:18:53,248 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 [2021-02-19 17:18:53,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-02-19 17:18:53,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-02-19 17:18:53,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-02-19 17:18:53,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 16 transitions. [2021-02-19 17:18:53,310 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 16 transitions. Word has length 16 [2021-02-19 17:18:53,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:53,311 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 16 transitions. [2021-02-19 17:18:53,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-19 17:18:53,311 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 16 transitions. [2021-02-19 17:18:53,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:18:53,313 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:18:53,313 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:53,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 17:18:53,314 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:18:53,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:53,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1294225527, now seen corresponding path program 1 times [2021-02-19 17:18:53,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:53,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058745320] [2021-02-19 17:18:53,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:53,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-19 17:18:53,384 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-19 17:18:53,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-19 17:18:53,407 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-19 17:18:53,445 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-02-19 17:18:53,445 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-19 17:18:53,448 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 17:18:53,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 05:18:53 BoogieIcfgContainer [2021-02-19 17:18:53,497 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 17:18:53,500 INFO L168 Benchmark]: Toolchain (without parser) took 1775.04 ms. Allocated memory is still 151.0 MB. Free memory was 127.1 MB in the beginning and 107.5 MB in the end (delta: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 8.0 GB. [2021-02-19 17:18:53,501 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory is still 125.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-19 17:18:53,503 INFO L168 Benchmark]: CACSL2BoogieTranslator took 244.62 ms. Allocated memory is still 151.0 MB. Free memory was 126.1 MB in the beginning and 116.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-19 17:18:53,505 INFO L168 Benchmark]: Boogie Preprocessor took 31.87 ms. Allocated memory is still 151.0 MB. Free memory was 116.6 MB in the beginning and 115.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-19 17:18:53,507 INFO L168 Benchmark]: RCFGBuilder took 408.72 ms. Allocated memory is still 151.0 MB. Free memory was 115.1 MB in the beginning and 101.9 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-02-19 17:18:53,508 INFO L168 Benchmark]: TraceAbstraction took 1067.82 ms. Allocated memory is still 151.0 MB. Free memory was 101.5 MB in the beginning and 107.5 MB in the end (delta: -6.0 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-19 17:18:53,516 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory is still 125.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 244.62 ms. Allocated memory is still 151.0 MB. Free memory was 126.1 MB in the beginning and 116.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 31.87 ms. Allocated memory is still 151.0 MB. Free memory was 116.6 MB in the beginning and 115.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 408.72 ms. Allocated memory is still 151.0 MB. Free memory was 115.1 MB in the beginning and 101.9 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1067.82 ms. Allocated memory is still 151.0 MB. Free memory was 101.5 MB in the beginning and 107.5 MB in the end (delta: -6.0 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 11]: 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 22, overapproximation of someBinaryArithmeticFLOAToperation at line 21. Possible FailurePath: [L15] int x; [L16] float y, z; [L18] x = __VERIFIER_nondet_int() [L19] CALL assume_abort_if_not(x >= -10 && x <= 10) VAL [\old(cond)=1] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L19] RET assume_abort_if_not(x >= -10 && x <= 10) VAL [x=0] [L21] y = x*x - 4.f VAL [x=0] [L22] CALL __VERIFIER_assert(y != 0.f) VAL [\old(cond)=0] [L11] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L11] 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: 0.8s, 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, 0.1s SatisfiabilityAnalysisTime, 0.2s 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...