/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 SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/terminator_03-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 01:43:09,302 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 01:43:09,305 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 01:43:09,323 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 01:43:09,324 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 01:43:09,325 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 01:43:09,327 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 01:43:09,340 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 01:43:09,342 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 01:43:09,343 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 01:43:09,344 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 01:43:09,346 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 01:43:09,346 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 01:43:09,349 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 01:43:09,352 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 01:43:09,353 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 01:43:09,356 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 01:43:09,359 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 01:43:09,360 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 01:43:09,366 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 01:43:09,368 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 01:43:09,371 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 01:43:09,372 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 01:43:09,372 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 01:43:09,377 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 01:43:09,388 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 01:43:09,389 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 01:43:09,390 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 01:43:09,391 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 01:43:09,410 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 01:43:09,410 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 01:43:09,413 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 01:43:09,413 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 01:43:09,414 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 01:43:09,414 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 01:43:09,414 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 01:43:09,414 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 01:43:09,414 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 01:43:09,415 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 01:43:09,416 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 01:43:09,416 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 01:43:09,416 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 01:43:09,417 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 01:43:09,417 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 01:43:09,417 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 01:43:09,417 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 01:43:09,417 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 01:43:09,418 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 01:43:09,418 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 01:43:09,418 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 01:43:09,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:43:09,418 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 01:43:09,419 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 01:43:09,419 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 01:43:09,419 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 01:43:09,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:43:09,419 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 01:43:09,420 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 01:43:09,420 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 -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 01:43:09,724 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 01:43:09,736 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 01:43:09,740 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 01:43:09,741 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 01:43:09,741 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 01:43:09,742 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/terminator_03-1.c [2020-07-21 01:43:09,806 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a4e73834/8cd863374e5347e5944af11db7c5d344/FLAGdf4a9a6d1 [2020-07-21 01:43:10,228 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 01:43:10,229 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/terminator_03-1.c [2020-07-21 01:43:10,238 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a4e73834/8cd863374e5347e5944af11db7c5d344/FLAGdf4a9a6d1 [2020-07-21 01:43:10,597 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a4e73834/8cd863374e5347e5944af11db7c5d344 [2020-07-21 01:43:10,607 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 01:43:10,610 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 01:43:10,611 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 01:43:10,612 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 01:43:10,615 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 01:43:10,616 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:43:10" (1/1) ... [2020-07-21 01:43:10,619 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34c729ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:43:10, skipping insertion in model container [2020-07-21 01:43:10,619 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:43:10" (1/1) ... [2020-07-21 01:43:10,627 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 01:43:10,642 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 01:43:10,837 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:43:10,841 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 01:43:10,855 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:43:10,867 INFO L208 MainTranslator]: Completed translation [2020-07-21 01:43:10,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:43:10 WrapperNode [2020-07-21 01:43:10,868 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 01:43:10,869 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 01:43:10,869 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 01:43:10,869 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 01:43:10,879 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:43:10" (1/1) ... [2020-07-21 01:43:10,879 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:43:10" (1/1) ... [2020-07-21 01:43:10,970 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:43:10" (1/1) ... [2020-07-21 01:43:10,971 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:43:10" (1/1) ... [2020-07-21 01:43:10,974 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:43:10" (1/1) ... [2020-07-21 01:43:10,979 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:43:10" (1/1) ... [2020-07-21 01:43:10,980 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:43:10" (1/1) ... [2020-07-21 01:43:10,981 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 01:43:10,983 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 01:43:10,983 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 01:43:10,983 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 01:43:10,984 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:43:10" (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 01:43:11,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 01:43:11,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 01:43:11,035 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 01:43:11,035 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 01:43:11,035 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 01:43:11,036 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 01:43:11,036 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 01:43:11,036 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 01:43:11,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 01:43:11,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 01:43:11,203 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 01:43:11,203 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 01:43:11,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:43:11 BoogieIcfgContainer [2020-07-21 01:43:11,207 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 01:43:11,209 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 01:43:11,209 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 01:43:11,212 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 01:43:11,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:43:10" (1/3) ... [2020-07-21 01:43:11,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fedf69b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:43:11, skipping insertion in model container [2020-07-21 01:43:11,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:43:10" (2/3) ... [2020-07-21 01:43:11,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fedf69b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:43:11, skipping insertion in model container [2020-07-21 01:43:11,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:43:11" (3/3) ... [2020-07-21 01:43:11,216 INFO L109 eAbstractionObserver]: Analyzing ICFG terminator_03-1.c [2020-07-21 01:43:11,226 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 01:43:11,233 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 01:43:11,246 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 01:43:11,270 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 01:43:11,270 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 01:43:11,270 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 01:43:11,271 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 01:43:11,271 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 01:43:11,271 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 01:43:11,271 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 01:43:11,271 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 01:43:11,290 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-07-21 01:43:11,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 01:43:11,295 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:43:11,296 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:43:11,297 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:43:11,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:43:11,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1712329921, now seen corresponding path program 1 times [2020-07-21 01:43:11,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:43:11,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823233956] [2020-07-21 01:43:11,309 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 01:43:11,375 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:43:11,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:43:11,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 01:43:11,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:43:11,469 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:43:11,499 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 01:43:11,500 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:43:11,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1823233956] [2020-07-21 01:43:11,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:43:11,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 01:43:11,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723739033] [2020-07-21 01:43:11,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 01:43:11,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:43:11,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 01:43:11,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:43:11,540 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 5 states. [2020-07-21 01:43:11,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:43:11,617 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-07-21 01:43:11,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 01:43:11,620 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-21 01:43:11,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:43:11,628 INFO L225 Difference]: With dead ends: 39 [2020-07-21 01:43:11,628 INFO L226 Difference]: Without dead ends: 12 [2020-07-21 01:43:11,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 01:43:11,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-07-21 01:43:11,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-07-21 01:43:11,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-07-21 01:43:11,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-07-21 01:43:11,670 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-07-21 01:43:11,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:43:11,671 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-07-21 01:43:11,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 01:43:11,671 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-07-21 01:43:11,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 01:43:11,672 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:43:11,672 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:43:11,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:43:11,887 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:43:11,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:43:11,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1117320769, now seen corresponding path program 1 times [2020-07-21 01:43:11,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:43:11,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259752726] [2020-07-21 01:43:11,890 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 01:43:11,915 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:43:11,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 01:43:11,916 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 01:43:11,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 01:43:11,924 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 01:43:11,935 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 01:43:11,936 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 01:43:12,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:43:12,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:43:12 BoogieIcfgContainer [2020-07-21 01:43:12,173 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 01:43:12,178 INFO L168 Benchmark]: Toolchain (without parser) took 1567.46 ms. Allocated memory was 146.3 MB in the beginning and 203.9 MB in the end (delta: 57.7 MB). Free memory was 103.9 MB in the beginning and 137.2 MB in the end (delta: -33.3 MB). Peak memory consumption was 24.4 MB. Max. memory is 7.1 GB. [2020-07-21 01:43:12,179 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 146.3 MB. Free memory is still 122.1 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 01:43:12,180 INFO L168 Benchmark]: CACSL2BoogieTranslator took 257.27 ms. Allocated memory is still 146.3 MB. Free memory was 103.5 MB in the beginning and 94.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-21 01:43:12,183 INFO L168 Benchmark]: Boogie Preprocessor took 112.35 ms. Allocated memory was 146.3 MB in the beginning and 203.9 MB in the end (delta: 57.7 MB). Free memory was 94.1 MB in the beginning and 182.9 MB in the end (delta: -88.8 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-21 01:43:12,184 INFO L168 Benchmark]: RCFGBuilder took 224.12 ms. Allocated memory is still 203.9 MB. Free memory was 182.9 MB in the beginning and 171.2 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. [2020-07-21 01:43:12,187 INFO L168 Benchmark]: TraceAbstraction took 964.86 ms. Allocated memory is still 203.9 MB. Free memory was 170.0 MB in the beginning and 137.2 MB in the end (delta: 32.8 MB). Peak memory consumption was 32.8 MB. Max. memory is 7.1 GB. [2020-07-21 01:43:12,197 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 146.3 MB. Free memory is still 122.1 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 257.27 ms. Allocated memory is still 146.3 MB. Free memory was 103.5 MB in the beginning and 94.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 112.35 ms. Allocated memory was 146.3 MB in the beginning and 203.9 MB in the end (delta: 57.7 MB). Free memory was 94.1 MB in the beginning and 182.9 MB in the end (delta: -88.8 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 224.12 ms. Allocated memory is still 203.9 MB. Free memory was 182.9 MB in the beginning and 171.2 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 964.86 ms. Allocated memory is still 203.9 MB. Free memory was 170.0 MB in the beginning and 137.2 MB in the end (delta: 32.8 MB). Peak memory consumption was 32.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L13] int x=__VERIFIER_nondet_int(); [L14] int y=__VERIFIER_nondet_int(); [L16] COND TRUE y>0 VAL [x=100, y=1] [L18] COND FALSE !(x<100) VAL [x=100, y=1] [L23] CALL __VERIFIER_assert(y<=0 || (y<0 && x>=100)) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 18 SDtfs, 7 SDslu, 49 SDs, 0 SdLazy, 15 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 21 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 135 SizeOfPredicates, 2 NumberOfNonLiveVariables, 27 ConjunctsInSsa, 4 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 proved your program to be incorrect! Received shutdown request...