/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/loop-lit/gsv2008.c.i.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 12:02:48,653 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 12:02:48,657 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 12:02:48,674 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 12:02:48,674 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 12:02:48,676 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 12:02:48,678 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 12:02:48,680 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 12:02:48,682 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 12:02:48,683 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 12:02:48,685 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 12:02:48,686 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 12:02:48,686 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 12:02:48,688 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 12:02:48,689 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 12:02:48,691 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 12:02:48,692 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 12:02:48,693 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 12:02:48,695 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 12:02:48,697 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 12:02:48,699 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 12:02:48,701 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 12:02:48,703 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 12:02:48,704 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 12:02:48,707 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 12:02:48,716 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 12:02:48,718 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 12:02:48,718 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 12:02:48,720 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 [2020-07-20 12:02:48,742 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 12:02:48,742 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 12:02:48,743 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 12:02:48,743 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 12:02:48,743 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 12:02:48,744 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 12:02:48,744 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 12:02:48,744 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 12:02:48,744 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 12:02:48,744 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 12:02:48,744 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 12:02:48,745 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 12:02:48,745 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 12:02:48,745 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 12:02:48,745 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 12:02:48,745 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 12:02:48,745 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 12:02:48,746 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 12:02:48,746 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 12:02:48,746 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 12:02:48,746 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 12:02:48,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 12:02:48,747 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 12:02:48,747 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 12:02:48,747 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 12:02:48,747 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 12:02:48,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:02:48,748 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 12:02:48,748 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 12:02:48,748 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 [2020-07-20 12:02:49,103 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 12:02:49,117 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 12:02:49,122 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 12:02:49,124 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 12:02:49,125 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 12:02:49,126 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gsv2008.c.i.v+lhb-reducer.c [2020-07-20 12:02:49,226 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/619584d40/cbe2fdc8eca44acf963a799de6a3e9a9/FLAG902ebcf08 [2020-07-20 12:02:49,826 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 12:02:49,829 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gsv2008.c.i.v+lhb-reducer.c [2020-07-20 12:02:49,838 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/619584d40/cbe2fdc8eca44acf963a799de6a3e9a9/FLAG902ebcf08 [2020-07-20 12:02:50,179 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/619584d40/cbe2fdc8eca44acf963a799de6a3e9a9 [2020-07-20 12:02:50,200 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 12:02:50,203 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 12:02:50,204 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 12:02:50,204 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 12:02:50,208 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 12:02:50,210 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:02:50" (1/1) ... [2020-07-20 12:02:50,213 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e02ab94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:50, skipping insertion in model container [2020-07-20 12:02:50,214 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:02:50" (1/1) ... [2020-07-20 12:02:50,224 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 12:02:50,250 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 12:02:50,459 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 12:02:50,466 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 12:02:50,488 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 12:02:50,505 INFO L208 MainTranslator]: Completed translation [2020-07-20 12:02:50,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:50 WrapperNode [2020-07-20 12:02:50,505 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 12:02:50,506 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 12:02:50,506 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 12:02:50,506 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 12:02:50,521 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:50" (1/1) ... [2020-07-20 12:02:50,521 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:50" (1/1) ... [2020-07-20 12:02:50,527 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:50" (1/1) ... [2020-07-20 12:02:50,528 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:50" (1/1) ... [2020-07-20 12:02:50,533 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:50" (1/1) ... [2020-07-20 12:02:50,536 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:50" (1/1) ... [2020-07-20 12:02:50,538 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:50" (1/1) ... [2020-07-20 12:02:50,540 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 12:02:50,540 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 12:02:50,541 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 12:02:50,541 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 12:02:50,542 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:50" (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 [2020-07-20 12:02:50,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 12:02:50,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 12:02:50,724 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 12:02:50,724 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 12:02:50,724 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 12:02:50,724 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 12:02:50,724 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 12:02:50,725 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 12:02:50,725 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 12:02:50,725 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 12:02:50,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 12:02:50,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 12:02:50,957 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 12:02:50,957 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 12:02:50,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:02:50 BoogieIcfgContainer [2020-07-20 12:02:50,962 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 12:02:50,963 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 12:02:50,964 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 12:02:50,967 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 12:02:50,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 12:02:50" (1/3) ... [2020-07-20 12:02:50,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@197db4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:02:50, skipping insertion in model container [2020-07-20 12:02:50,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:50" (2/3) ... [2020-07-20 12:02:50,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@197db4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:02:50, skipping insertion in model container [2020-07-20 12:02:50,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:02:50" (3/3) ... [2020-07-20 12:02:50,972 INFO L109 eAbstractionObserver]: Analyzing ICFG gsv2008.c.i.v+lhb-reducer.c [2020-07-20 12:02:50,982 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 12:02:50,990 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 12:02:51,008 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 12:02:51,038 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 12:02:51,038 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 12:02:51,038 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 12:02:51,039 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 12:02:51,040 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 12:02:51,041 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 12:02:51,041 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 12:02:51,041 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 12:02:51,061 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-07-20 12:02:51,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 12:02:51,069 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:02:51,070 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:02:51,071 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:02:51,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:02:51,079 INFO L82 PathProgramCache]: Analyzing trace with hash 489049782, now seen corresponding path program 1 times [2020-07-20 12:02:51,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:02:51,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470814827] [2020-07-20 12:02:51,088 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 [2020-07-20 12:02:51,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:02:51,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 12:02:51,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:02:51,342 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 12:02:51,348 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 12:02:51,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:02:51,374 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:02:51,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470814827] [2020-07-20 12:02:51,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:02:51,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 12:02:51,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634699517] [2020-07-20 12:02:51,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 12:02:51,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:02:51,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 12:02:51,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 12:02:51,399 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 5 states. [2020-07-20 12:02:51,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:02:51,540 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-07-20 12:02:51,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 12:02:51,544 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 12:02:51,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:02:51,557 INFO L225 Difference]: With dead ends: 33 [2020-07-20 12:02:51,558 INFO L226 Difference]: Without dead ends: 16 [2020-07-20 12:02:51,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-07-20 12:02:51,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-07-20 12:02:51,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-07-20 12:02:51,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-07-20 12:02:51,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-07-20 12:02:51,607 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2020-07-20 12:02:51,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:02:51,608 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-07-20 12:02:51,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 12:02:51,608 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-07-20 12:02:51,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 12:02:51,610 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:02:51,610 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:02:51,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:02:51,825 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:02:51,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:02:51,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1823317113, now seen corresponding path program 1 times [2020-07-20 12:02:51,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:02:51,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [86569628] [2020-07-20 12:02:51,827 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 [2020-07-20 12:02:51,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:02:51,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 12:02:51,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:02:51,960 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 12:02:51,963 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 12:02:51,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:02:51,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:02:52,005 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 12:02:52,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:02:52,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [86569628] [2020-07-20 12:02:52,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 12:02:52,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2020-07-20 12:02:52,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284728638] [2020-07-20 12:02:52,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 12:02:52,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:02:52,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 12:02:52,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-20 12:02:52,106 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 6 states. [2020-07-20 12:02:52,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:02:52,176 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-07-20 12:02:52,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 12:02:52,177 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-07-20 12:02:52,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:02:52,177 INFO L225 Difference]: With dead ends: 16 [2020-07-20 12:02:52,177 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 12:02:52,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-07-20 12:02:52,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 12:02:52,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 12:02:52,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 12:02:52,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 12:02:52,181 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2020-07-20 12:02:52,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:02:52,181 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 12:02:52,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 12:02:52,182 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 12:02:52,182 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 12:02:52,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:02:52,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 12:02:52,463 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-20 12:02:52,464 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-20 12:02:52,464 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 12:02:52,464 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 12:02:52,465 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 12:02:52,465 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 12:02:52,465 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 12:02:52,465 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 4 6) no Hoare annotation was computed. [2020-07-20 12:02:52,466 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-20 12:02:52,466 INFO L268 CegarLoopResult]: For program point L5-2(lines 4 6) no Hoare annotation was computed. [2020-07-20 12:02:52,466 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 4 6) no Hoare annotation was computed. [2020-07-20 12:02:52,466 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 55) no Hoare annotation was computed. [2020-07-20 12:02:52,466 INFO L268 CegarLoopResult]: For program point L30(lines 30 69) no Hoare annotation was computed. [2020-07-20 12:02:52,467 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 12 72) the Hoare annotation is: true [2020-07-20 12:02:52,467 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 12 72) no Hoare annotation was computed. [2020-07-20 12:02:52,467 INFO L268 CegarLoopResult]: For program point L24(lines 24 70) no Hoare annotation was computed. [2020-07-20 12:02:52,467 INFO L268 CegarLoopResult]: For program point L55(line 55) no Hoare annotation was computed. [2020-07-20 12:02:52,467 INFO L268 CegarLoopResult]: For program point L53(lines 53 62) no Hoare annotation was computed. [2020-07-20 12:02:52,468 INFO L268 CegarLoopResult]: For program point L18(lines 18 71) no Hoare annotation was computed. [2020-07-20 12:02:52,468 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 12 72) no Hoare annotation was computed. [2020-07-20 12:02:52,468 INFO L264 CegarLoopResult]: At program point L44(lines 31 65) the Hoare annotation is: (or (< 0 main_~main__y~0) (< main_~main__x~0 0)) [2020-07-20 12:02:52,468 INFO L268 CegarLoopResult]: For program point L38(lines 38 64) no Hoare annotation was computed. [2020-07-20 12:02:52,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 12:02:52 BoogieIcfgContainer [2020-07-20 12:02:52,495 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 12:02:52,500 INFO L168 Benchmark]: Toolchain (without parser) took 2295.29 ms. Allocated memory was 143.7 MB in the beginning and 200.3 MB in the end (delta: 56.6 MB). Free memory was 101.0 MB in the beginning and 103.8 MB in the end (delta: -2.8 MB). Peak memory consumption was 53.8 MB. Max. memory is 7.1 GB. [2020-07-20 12:02:52,501 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 143.7 MB. Free memory is still 119.6 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 12:02:52,502 INFO L168 Benchmark]: CACSL2BoogieTranslator took 302.00 ms. Allocated memory is still 143.7 MB. Free memory was 100.8 MB in the beginning and 90.9 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-20 12:02:52,504 INFO L168 Benchmark]: Boogie Preprocessor took 34.12 ms. Allocated memory is still 143.7 MB. Free memory was 90.9 MB in the beginning and 89.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-20 12:02:52,508 INFO L168 Benchmark]: RCFGBuilder took 421.55 ms. Allocated memory was 143.7 MB in the beginning and 200.3 MB in the end (delta: 56.6 MB). Free memory was 89.3 MB in the beginning and 166.3 MB in the end (delta: -77.0 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-20 12:02:52,509 INFO L168 Benchmark]: TraceAbstraction took 1531.57 ms. Allocated memory is still 200.3 MB. Free memory was 166.3 MB in the beginning and 103.8 MB in the end (delta: 62.5 MB). Peak memory consumption was 62.5 MB. Max. memory is 7.1 GB. [2020-07-20 12:02:52,520 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 143.7 MB. Free memory is still 119.6 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 302.00 ms. Allocated memory is still 143.7 MB. Free memory was 100.8 MB in the beginning and 90.9 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 34.12 ms. Allocated memory is still 143.7 MB. Free memory was 90.9 MB in the beginning and 89.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 421.55 ms. Allocated memory was 143.7 MB in the beginning and 200.3 MB in the end (delta: 56.6 MB). Free memory was 89.3 MB in the beginning and 166.3 MB in the end (delta: -77.0 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1531.57 ms. Allocated memory is still 200.3 MB. Free memory was 166.3 MB in the beginning and 103.8 MB in the end (delta: 62.5 MB). Peak memory consumption was 62.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 55]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 31]: Loop Invariant Derived loop invariant: 0 < main__y || main__x < 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.3s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 27 SDtfs, 12 SDslu, 68 SDs, 0 SdLazy, 31 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 6 NumberOfFragments, 11 HoareAnnotationTreeSize, 5 FomulaSimplifications, 13 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 40 ConstructedInterpolants, 0 QuantifiedInterpolants, 2088 SizeOfPredicates, 9 NumberOfNonLiveVariables, 129 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 2/4 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 proved your program to be correct! Received shutdown request...