/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-benchs/inv_square-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 10:39:32,017 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 10:39:32,019 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 10:39:32,037 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 10:39:32,037 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 10:39:32,038 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 10:39:32,040 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 10:39:32,049 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 10:39:32,053 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 10:39:32,057 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 10:39:32,057 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 10:39:32,059 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 10:39:32,059 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 10:39:32,061 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 10:39:32,063 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 10:39:32,064 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 10:39:32,065 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 10:39:32,066 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 10:39:32,067 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 10:39:32,071 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 10:39:32,076 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 10:39:32,079 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 10:39:32,080 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 10:39:32,081 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 10:39:32,084 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 10:39:32,093 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 10:39:32,094 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 10:39:32,095 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 10:39:32,096 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 [2020-07-21 10:39:32,124 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 10:39:32,125 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 10:39:32,126 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 10:39:32,126 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 10:39:32,126 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 10:39:32,127 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 10:39:32,127 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 10:39:32,127 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 10:39:32,127 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 10:39:32,127 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 10:39:32,128 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 10:39:32,129 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 10:39:32,129 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 10:39:32,129 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 10:39:32,129 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 10:39:32,130 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 10:39:32,130 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 10:39:32,130 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 10:39:32,130 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 10:39:32,130 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 10:39:32,131 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 10:39:32,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 10:39:32,131 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 10:39:32,131 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 10:39:32,131 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 10:39:32,132 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 10:39:32,132 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:39:32,132 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 10:39:32,132 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 10:39:32,132 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-21 10:39:32,409 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 10:39:32,430 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 10:39:32,433 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 10:39:32,435 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 10:39:32,437 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 10:39:32,438 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/inv_square-1.c [2020-07-21 10:39:32,510 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2cd43315/87984bed47ab40bdbc07da83bef4e6fd/FLAGa687e940a [2020-07-21 10:39:32,973 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 10:39:32,974 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/inv_square-1.c [2020-07-21 10:39:32,981 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2cd43315/87984bed47ab40bdbc07da83bef4e6fd/FLAGa687e940a [2020-07-21 10:39:33,353 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2cd43315/87984bed47ab40bdbc07da83bef4e6fd [2020-07-21 10:39:33,362 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 10:39:33,365 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 10:39:33,366 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 10:39:33,366 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 10:39:33,370 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 10:39:33,371 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:39:33" (1/1) ... [2020-07-21 10:39:33,374 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34d87159 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:39:33, skipping insertion in model container [2020-07-21 10:39:33,374 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:39:33" (1/1) ... [2020-07-21 10:39:33,382 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 10:39:33,402 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 10:39:33,570 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:39:33,575 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 10:39:33,591 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:39:33,606 INFO L208 MainTranslator]: Completed translation [2020-07-21 10:39:33,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:39:33 WrapperNode [2020-07-21 10:39:33,607 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 10:39:33,607 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 10:39:33,607 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 10:39:33,608 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 10:39:33,620 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:39:33" (1/1) ... [2020-07-21 10:39:33,621 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:39:33" (1/1) ... [2020-07-21 10:39:33,706 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:39:33" (1/1) ... [2020-07-21 10:39:33,706 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:39:33" (1/1) ... [2020-07-21 10:39:33,716 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:39:33" (1/1) ... [2020-07-21 10:39:33,719 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:39:33" (1/1) ... [2020-07-21 10:39:33,720 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:39:33" (1/1) ... [2020-07-21 10:39:33,722 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 10:39:33,723 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 10:39:33,729 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 10:39:33,729 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 10:39:33,730 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:39:33" (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 [2020-07-21 10:39:33,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 10:39:33,797 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 10:39:33,797 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 10:39:33,797 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 10:39:33,797 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 10:39:33,797 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 10:39:33,797 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-07-21 10:39:33,797 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 10:39:33,798 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 10:39:33,798 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 10:39:33,798 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 10:39:33,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 10:39:33,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 10:39:33,967 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 10:39:33,968 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 10:39:33,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:39:33 BoogieIcfgContainer [2020-07-21 10:39:33,972 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 10:39:33,973 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 10:39:33,973 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 10:39:33,976 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 10:39:33,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:39:33" (1/3) ... [2020-07-21 10:39:33,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2822c9f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:39:33, skipping insertion in model container [2020-07-21 10:39:33,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:39:33" (2/3) ... [2020-07-21 10:39:33,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2822c9f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:39:33, skipping insertion in model container [2020-07-21 10:39:33,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:39:33" (3/3) ... [2020-07-21 10:39:33,980 INFO L109 eAbstractionObserver]: Analyzing ICFG inv_square-1.c [2020-07-21 10:39:33,992 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 10:39:33,999 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 10:39:34,024 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 10:39:34,061 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 10:39:34,062 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 10:39:34,062 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 10:39:34,062 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 10:39:34,062 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 10:39:34,062 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 10:39:34,063 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 10:39:34,063 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 10:39:34,085 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-21 10:39:34,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 10:39:34,092 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:39:34,093 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:39:34,093 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:39:34,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:39:34,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1226267161, now seen corresponding path program 1 times [2020-07-21 10:39:34,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:39:34,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172135357] [2020-07-21 10:39:34,112 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:39:34,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:39:34,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 10:39:34,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:39:34,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 10:39:34,201 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:39:34,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172135357] [2020-07-21 10:39:34,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:39:34,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 10:39:34,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352643198] [2020-07-21 10:39:34,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 10:39:34,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:39:34,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 10:39:34,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 10:39:34,225 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-07-21 10:39:34,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:39:34,249 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-07-21 10:39:34,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 10:39:34,251 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2020-07-21 10:39:34,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:39:34,258 INFO L225 Difference]: With dead ends: 40 [2020-07-21 10:39:34,259 INFO L226 Difference]: Without dead ends: 16 [2020-07-21 10:39:34,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 10:39:34,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-07-21 10:39:34,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-07-21 10:39:34,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-07-21 10:39:34,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 15 transitions. [2020-07-21 10:39:34,300 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 15 transitions. Word has length 15 [2020-07-21 10:39:34,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:39:34,301 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 15 transitions. [2020-07-21 10:39:34,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 10:39:34,301 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 15 transitions. [2020-07-21 10:39:34,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 10:39:34,302 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:39:34,302 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:39:34,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:39:34,516 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:39:34,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:39:34,517 INFO L82 PathProgramCache]: Analyzing trace with hash -2035613787, now seen corresponding path program 1 times [2020-07-21 10:39:34,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:39:34,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1707981005] [2020-07-21 10:39:34,519 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:39:34,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 10:39:34,559 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 10:39:34,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 10:39:34,569 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 10:39:34,586 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 10:39:34,586 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 10:39:34,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:39:34,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 10:39:34 BoogieIcfgContainer [2020-07-21 10:39:34,810 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 10:39:34,813 INFO L168 Benchmark]: Toolchain (without parser) took 1448.24 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 103.7 MB in the beginning and 142.5 MB in the end (delta: -38.8 MB). Peak memory consumption was 24.6 MB. Max. memory is 7.1 GB. [2020-07-21 10:39:34,814 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-21 10:39:34,815 INFO L168 Benchmark]: CACSL2BoogieTranslator took 241.09 ms. Allocated memory is still 138.9 MB. Free memory was 103.5 MB in the beginning and 94.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-21 10:39:34,816 INFO L168 Benchmark]: Boogie Preprocessor took 114.43 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 94.0 MB in the beginning and 181.7 MB in the end (delta: -87.7 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2020-07-21 10:39:34,818 INFO L168 Benchmark]: RCFGBuilder took 248.68 ms. Allocated memory is still 202.4 MB. Free memory was 181.0 MB in the beginning and 169.2 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. [2020-07-21 10:39:34,819 INFO L168 Benchmark]: TraceAbstraction took 837.43 ms. Allocated memory is still 202.4 MB. Free memory was 168.6 MB in the beginning and 142.5 MB in the end (delta: 26.0 MB). Peak memory consumption was 26.0 MB. Max. memory is 7.1 GB. [2020-07-21 10:39:34,826 INFO L336 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 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 241.09 ms. Allocated memory is still 138.9 MB. Free memory was 103.5 MB in the beginning and 94.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.43 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 94.0 MB in the beginning and 181.7 MB in the end (delta: -87.7 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 248.68 ms. Allocated memory is still 202.4 MB. Free memory was 181.0 MB in the beginning and 169.2 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 837.43 ms. Allocated memory is still 202.4 MB. Free memory was 168.6 MB in the beginning and 142.5 MB in the end (delta: 26.0 MB). Peak memory consumption was 26.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 11]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 22, overapproximation of someBinaryArithmeticFLOAToperation at line 21. Possible FailurePath: [L15] float x, y, z; [L17] x = __VERIFIER_nondet_float() [L18] CALL assume_abort_if_not(x >= -1.f && x <= 1.f) VAL [\old(cond)=1] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L18] RET assume_abort_if_not(x >= -1.f && x <= 1.f) VAL [x=0] [L20] COND TRUE x != 0.f [L21] y = x * x 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] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 24 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 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, 0.0s InterpolantComputationTime, 30 NumberOfCodeBlocks, 30 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 14 ConstructedInterpolants, 0 QuantifiedInterpolants, 196 SizeOfPredicates, 0 NumberOfNonLiveVariables, 31 ConjunctsInSsa, 1 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...