/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/float-benchs/filter2_alt.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 03:41:31,563 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 03:41:31,566 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 03:41:31,621 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 03:41:31,722 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 03:41:31,773 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 03:41:31,774 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 03:41:31,778 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 03:41:31,779 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 03:41:31,779 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 03:41:31,779 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 03:41:31,779 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 03:41:31,780 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 03:41:31,780 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 03:41:31,780 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 03:41:31,781 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 03:41:31,782 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 03:41:31,782 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 03:41:31,782 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 03:41:31,782 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 03:41:31,783 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 03:41:31,783 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 03:41:31,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 03:41:31,783 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 03:41:31,783 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 03:41:31,784 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 03:41:31,784 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 03:41:31,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 03:41:31,784 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 03:41:31,785 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 03:41:31,785 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 03:41:32,173 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 03:41:32,201 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 03:41:32,205 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 03:41:32,206 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 03:41:32,207 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 03:41:32,208 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/filter2_alt.c [2020-12-22 03:41:32,290 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f1c2ec48/ebdbc08a40bb41799f0509e70874460d/FLAG2661394dd [2020-12-22 03:41:33,001 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 03:41:33,002 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/filter2_alt.c [2020-12-22 03:41:33,010 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f1c2ec48/ebdbc08a40bb41799f0509e70874460d/FLAG2661394dd [2020-12-22 03:41:33,360 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f1c2ec48/ebdbc08a40bb41799f0509e70874460d [2020-12-22 03:41:33,363 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 03:41:33,365 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 03:41:33,370 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 03:41:33,370 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 03:41:33,374 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 03:41:33,375 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:41:33" (1/1) ... [2020-12-22 03:41:33,377 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44fb2f10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:33, skipping insertion in model container [2020-12-22 03:41:33,377 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:41:33" (1/1) ... [2020-12-22 03:41:33,387 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 03:41:33,408 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 03:41:33,578 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/filter2_alt.c[631,644] [2020-12-22 03:41:33,604 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:41:33,615 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 03:41:33,630 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/filter2_alt.c[631,644] [2020-12-22 03:41:33,641 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:41:33,661 INFO L208 MainTranslator]: Completed translation [2020-12-22 03:41:33,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:33 WrapperNode [2020-12-22 03:41:33,662 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 03:41:33,663 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 03:41:33,664 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 03:41:33,664 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 03:41:33,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:33" (1/1) ... [2020-12-22 03:41:33,683 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:33" (1/1) ... [2020-12-22 03:41:33,710 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 03:41:33,711 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 03:41:33,711 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 03:41:33,711 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 03:41:33,722 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:33" (1/1) ... [2020-12-22 03:41:33,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:33" (1/1) ... [2020-12-22 03:41:33,725 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:33" (1/1) ... [2020-12-22 03:41:33,726 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:33" (1/1) ... [2020-12-22 03:41:33,735 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:33" (1/1) ... [2020-12-22 03:41:33,739 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:33" (1/1) ... [2020-12-22 03:41:33,741 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:33" (1/1) ... [2020-12-22 03:41:33,744 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 03:41:33,745 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 03:41:33,745 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 03:41:33,745 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 03:41:33,746 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:33" (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 [2020-12-22 03:41:33,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 03:41:33,851 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 03:41:33,851 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-12-22 03:41:33,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-12-22 03:41:33,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 03:41:33,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 03:41:33,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2020-12-22 03:41:34,264 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 03:41:34,265 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2020-12-22 03:41:34,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:41:34 BoogieIcfgContainer [2020-12-22 03:41:34,270 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 03:41:34,272 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 03:41:34,272 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 03:41:34,281 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 03:41:34,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 03:41:33" (1/3) ... [2020-12-22 03:41:34,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53145ebb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:41:34, skipping insertion in model container [2020-12-22 03:41:34,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:33" (2/3) ... [2020-12-22 03:41:34,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53145ebb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:41:34, skipping insertion in model container [2020-12-22 03:41:34,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:41:34" (3/3) ... [2020-12-22 03:41:34,286 INFO L111 eAbstractionObserver]: Analyzing ICFG filter2_alt.c [2020-12-22 03:41:34,294 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 03:41:34,299 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 03:41:34,320 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 03:41:34,361 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 03:41:34,362 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 03:41:34,362 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 03:41:34,362 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 03:41:34,362 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 03:41:34,362 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 03:41:34,363 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 03:41:34,363 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 03:41:34,383 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-12-22 03:41:34,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 03:41:34,398 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:34,399 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:34,400 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:34,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:34,408 INFO L82 PathProgramCache]: Analyzing trace with hash -711541957, now seen corresponding path program 1 times [2020-12-22 03:41:34,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:34,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498073628] [2020-12-22 03:41:34,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:34,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:34,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:34,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498073628] [2020-12-22 03:41:34,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:41:34,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 03:41:34,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350021866] [2020-12-22 03:41:34,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 03:41:34,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:34,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 03:41:34,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 03:41:34,704 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-12-22 03:41:34,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:34,723 INFO L93 Difference]: Finished difference Result 31 states and 41 transitions. [2020-12-22 03:41:34,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 03:41:34,724 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-12-22 03:41:34,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:34,751 INFO L225 Difference]: With dead ends: 31 [2020-12-22 03:41:34,751 INFO L226 Difference]: Without dead ends: 15 [2020-12-22 03:41:34,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 03:41:34,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-22 03:41:34,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-22 03:41:34,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-22 03:41:34,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-12-22 03:41:34,796 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-12-22 03:41:34,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:34,797 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-12-22 03:41:34,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 03:41:34,797 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-12-22 03:41:34,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 03:41:34,799 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:34,799 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:34,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 03:41:34,800 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:34,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:34,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1047310665, now seen corresponding path program 1 times [2020-12-22 03:41:34,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:34,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978535712] [2020-12-22 03:41:34,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:34,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:34,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:34,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978535712] [2020-12-22 03:41:34,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:41:34,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 03:41:34,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155347134] [2020-12-22 03:41:34,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 03:41:34,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:34,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 03:41:34,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 03:41:34,941 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 3 states. [2020-12-22 03:41:34,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:34,963 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-12-22 03:41:34,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 03:41:34,963 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-12-22 03:41:34,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:34,964 INFO L225 Difference]: With dead ends: 32 [2020-12-22 03:41:34,964 INFO L226 Difference]: Without dead ends: 22 [2020-12-22 03:41:34,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 03:41:34,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-22 03:41:34,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2020-12-22 03:41:34,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-22 03:41:34,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-12-22 03:41:34,971 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 12 [2020-12-22 03:41:34,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:34,971 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-12-22 03:41:34,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 03:41:34,971 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-12-22 03:41:34,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 03:41:34,972 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:34,972 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:34,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 03:41:34,973 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:34,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:34,973 INFO L82 PathProgramCache]: Analyzing trace with hash 60789832, now seen corresponding path program 1 times [2020-12-22 03:41:34,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:34,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659149472] [2020-12-22 03:41:34,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:35,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 03:41:35,059 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 03:41:35,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 03:41:35,143 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 03:41:35,173 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-22 03:41:35,173 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 03:41:35,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 03:41:35,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 03:41:35 BoogieIcfgContainer [2020-12-22 03:41:35,223 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 03:41:35,224 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 03:41:35,224 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 03:41:35,225 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 03:41:35,225 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:41:34" (3/4) ... [2020-12-22 03:41:35,230 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-22 03:41:35,230 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 03:41:35,235 INFO L168 Benchmark]: Toolchain (without parser) took 1866.17 ms. Allocated memory is still 151.0 MB. Free memory was 125.6 MB in the beginning and 97.2 MB in the end (delta: 28.5 MB). Peak memory consumption was 27.6 MB. Max. memory is 8.0 GB. [2020-12-22 03:41:35,237 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 124.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 03:41:35,240 INFO L168 Benchmark]: CACSL2BoogieTranslator took 292.55 ms. Allocated memory is still 151.0 MB. Free memory was 125.5 MB in the beginning and 115.1 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-22 03:41:35,243 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.97 ms. Allocated memory is still 151.0 MB. Free memory was 115.1 MB in the beginning and 113.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 03:41:35,243 INFO L168 Benchmark]: Boogie Preprocessor took 33.19 ms. Allocated memory is still 151.0 MB. Free memory was 113.4 MB in the beginning and 112.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 03:41:35,246 INFO L168 Benchmark]: RCFGBuilder took 525.29 ms. Allocated memory is still 151.0 MB. Free memory was 112.0 MB in the beginning and 131.8 MB in the end (delta: -19.8 MB). Peak memory consumption was 17.1 MB. Max. memory is 8.0 GB. [2020-12-22 03:41:35,247 INFO L168 Benchmark]: TraceAbstraction took 951.49 ms. Allocated memory is still 151.0 MB. Free memory was 131.2 MB in the beginning and 97.7 MB in the end (delta: 33.6 MB). Peak memory consumption was 33.6 MB. Max. memory is 8.0 GB. [2020-12-22 03:41:35,252 INFO L168 Benchmark]: Witness Printer took 6.04 ms. Allocated memory is still 151.0 MB. Free memory was 97.7 MB in the beginning and 97.2 MB in the end (delta: 522.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 03:41:35,260 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 124.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 292.55 ms. Allocated memory is still 151.0 MB. Free memory was 125.5 MB in the beginning and 115.1 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 46.97 ms. Allocated memory is still 151.0 MB. Free memory was 115.1 MB in the beginning and 113.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.19 ms. Allocated memory is still 151.0 MB. Free memory was 113.4 MB in the beginning and 112.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 525.29 ms. Allocated memory is still 151.0 MB. Free memory was 112.0 MB in the beginning and 131.8 MB in the end (delta: -19.8 MB). Peak memory consumption was 17.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 951.49 ms. Allocated memory is still 151.0 MB. Free memory was 131.2 MB in the beginning and 97.7 MB in the end (delta: 33.6 MB). Peak memory consumption was 33.6 MB. Max. memory is 8.0 GB. * Witness Printer took 6.04 ms. Allocated memory is still 151.0 MB. Free memory was 97.7 MB in the beginning and 97.2 MB in the end (delta: 522.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 14]: 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 43, overapproximation of someBinaryArithmeticFLOAToperation at line 38. Possible FailurePath: [L19] BOOLEAN INIT; [L20] float P, X; [L32] static float E[2], S[2]; VAL [E={3:0}, INIT=0, P=0, S={5:0}, X=0] [L24] float x; [L25] x = __VERIFIER_nondet_float() [L12] COND FALSE !(!cond) VAL [E={3:0}, INIT=0, P=0, S={5:0}, X=0] [L27] return x; VAL [E={3:0}, INIT=0, P=0, S={5:0}, X=0] [L52] X = RANDOM_INPUT() [L53] INIT = TRUE VAL [E={3:0}, INIT=1, P=0, S={5:0}, X=50] [L54] COND TRUE \read(TRUE) [L24] float x; [L25] x = __VERIFIER_nondet_float() [L12] COND FALSE !(!cond) VAL [E={3:0}, INIT=1, P=0, S={5:0}, X=50] [L27] return x; VAL [E={3:0}, INIT=1, P=0, S={5:0}, X=50] [L55] X = RANDOM_INPUT() [L33] COND TRUE \read(INIT) [L34] S[0] = X [L35] P = X [L36] E[0] = X VAL [E={3:0}, INIT=1, P=51, S={5:0}, X=51] [L46] EXPR E[0] [L46] E[1] = E[0] [L46] E[0] = X [L47] EXPR S[0] [L47] S[1] = S[0] [L47] S[0] = P VAL [E={3:0}, INIT=1, P=51, S={5:0}, X=51] [L57] INIT = FALSE VAL [E={3:0}, INIT=0, P=51, S={5:0}, X=51] [L54] COND TRUE \read(TRUE) [L24] float x; [L25] x = __VERIFIER_nondet_float() [L12] COND FALSE !(!cond) VAL [E={3:0}, INIT=0, P=51, S={5:0}, X=51] [L27] return x; VAL [E={3:0}, INIT=0, P=51, S={5:0}, X=51] [L55] X = RANDOM_INPUT() [L33] COND FALSE !(\read(INIT)) [L39] EXPR E[0] [L40] EXPR E[1] [L41] EXPR S[0] [L42] EXPR S[1] [L38-L42] P = (((((0.4677826f * X) - (E[0] * 0.7700725f)) + (E[1] * 0.4344376f)) + (S[0] * 1.5419f)) - (S[1] * 0.6740477f)) [L14] COND TRUE !(cond) VAL [E={3:0}, INIT=0, S={5:0}, X=55] [L14] reach_error() VAL [E={3:0}, INIT=0, S={5:0}, X=55] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 31 SDtfs, 2 SDslu, 11 SDs, 0 SdLazy, 5 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=2, 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, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 43 NumberOfCodeBlocks, 43 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 22 ConstructedInterpolants, 0 QuantifiedInterpolants, 352 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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...