/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 NUM_VARIABLES --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/loop-lit/gcnr2008.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 17:55:59,965 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 17:55:59,968 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 17:55:59,982 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 17:55:59,983 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 17:55:59,984 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 17:55:59,985 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 17:55:59,988 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 17:55:59,990 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 17:55:59,991 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 17:55:59,992 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 17:55:59,994 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 17:55:59,994 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 17:55:59,995 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 17:55:59,997 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 17:55:59,998 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 17:55:59,999 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 17:56:00,001 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 17:56:00,002 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 17:56:00,005 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 17:56:00,007 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 17:56:00,008 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 17:56:00,010 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 17:56:00,011 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 17:56:00,014 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 17:56:00,023 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 17:56:00,025 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 17:56:00,026 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 17:56:00,027 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 17:56:00,046 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 17:56:00,047 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 17:56:00,049 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 17:56:00,050 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 17:56:00,050 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 17:56:00,050 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 17:56:00,050 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 17:56:00,051 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 17:56:00,051 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 17:56:00,051 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 17:56:00,052 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 17:56:00,053 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 17:56:00,053 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 17:56:00,053 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 17:56:00,053 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 17:56:00,054 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 17:56:00,054 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 17:56:00,054 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 17:56:00,055 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 17:56:00,055 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 17:56:00,055 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 17:56:00,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:56:00,056 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 17:56:00,056 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 17:56:00,056 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 17:56:00,057 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 17:56:00,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:56:00,057 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 17:56:00,057 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 17:56:00,057 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 -> NUM_VARIABLES 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 [2020-07-20 17:56:00,394 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 17:56:00,410 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 17:56:00,414 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 17:56:00,416 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 17:56:00,416 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 17:56:00,417 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gcnr2008.i [2020-07-20 17:56:00,494 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0119c6293/f54400c6b7914b1fac75392991214e6f/FLAGb0f7d7c42 [2020-07-20 17:56:01,075 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 17:56:01,075 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gcnr2008.i [2020-07-20 17:56:01,083 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0119c6293/f54400c6b7914b1fac75392991214e6f/FLAGb0f7d7c42 [2020-07-20 17:56:01,385 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0119c6293/f54400c6b7914b1fac75392991214e6f [2020-07-20 17:56:01,396 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 17:56:01,399 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 17:56:01,401 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 17:56:01,401 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 17:56:01,406 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 17:56:01,407 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:56:01" (1/1) ... [2020-07-20 17:56:01,411 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3801ca8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:01, skipping insertion in model container [2020-07-20 17:56:01,412 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:56:01" (1/1) ... [2020-07-20 17:56:01,421 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 17:56:01,446 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 17:56:01,686 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:56:01,696 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 17:56:01,727 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:56:01,742 INFO L208 MainTranslator]: Completed translation [2020-07-20 17:56:01,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:01 WrapperNode [2020-07-20 17:56:01,743 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 17:56:01,744 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 17:56:01,744 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 17:56:01,744 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 17:56:01,759 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:01" (1/1) ... [2020-07-20 17:56:01,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:01" (1/1) ... [2020-07-20 17:56:01,766 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:01" (1/1) ... [2020-07-20 17:56:01,766 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:01" (1/1) ... [2020-07-20 17:56:01,771 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:01" (1/1) ... [2020-07-20 17:56:01,860 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:01" (1/1) ... [2020-07-20 17:56:01,862 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:01" (1/1) ... [2020-07-20 17:56:01,867 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 17:56:01,867 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 17:56:01,867 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 17:56:01,868 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 17:56:01,869 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:01" (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 17:56:01,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 17:56:01,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 17:56:01,953 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 17:56:01,953 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 17:56:01,953 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 17:56:01,954 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 17:56:01,954 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 17:56:01,954 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 17:56:01,954 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 17:56:01,954 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 17:56:01,954 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 17:56:01,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 17:56:01,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 17:56:02,191 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 17:56:02,191 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 17:56:02,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:56:02 BoogieIcfgContainer [2020-07-20 17:56:02,198 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 17:56:02,200 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 17:56:02,200 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 17:56:02,204 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 17:56:02,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:56:01" (1/3) ... [2020-07-20 17:56:02,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23ca7045 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:56:02, skipping insertion in model container [2020-07-20 17:56:02,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:01" (2/3) ... [2020-07-20 17:56:02,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23ca7045 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:56:02, skipping insertion in model container [2020-07-20 17:56:02,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:56:02" (3/3) ... [2020-07-20 17:56:02,210 INFO L109 eAbstractionObserver]: Analyzing ICFG gcnr2008.i [2020-07-20 17:56:02,223 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 17:56:02,237 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 17:56:02,263 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 17:56:02,305 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 17:56:02,306 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 17:56:02,306 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 17:56:02,306 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 17:56:02,308 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 17:56:02,309 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 17:56:02,309 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 17:56:02,309 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 17:56:02,343 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-20 17:56:02,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 17:56:02,351 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:56:02,353 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:56:02,354 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:56:02,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:56:02,364 INFO L82 PathProgramCache]: Analyzing trace with hash 820478905, now seen corresponding path program 1 times [2020-07-20 17:56:02,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:56:02,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663616401] [2020-07-20 17:56:02,378 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 [2020-07-20 17:56:02,454 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:56:02,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:56:02,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 17:56:02,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:56:02,484 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 17:56:02,485 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:56:02,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663616401] [2020-07-20 17:56:02,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:56:02,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 17:56:02,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183510136] [2020-07-20 17:56:02,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 17:56:02,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:56:02,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 17:56:02,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 17:56:02,511 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-07-20 17:56:02,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:56:02,536 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-07-20 17:56:02,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 17:56:02,538 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-20 17:56:02,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:56:02,547 INFO L225 Difference]: With dead ends: 36 [2020-07-20 17:56:02,548 INFO L226 Difference]: Without dead ends: 17 [2020-07-20 17:56:02,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 17:56:02,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-07-20 17:56:02,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-07-20 17:56:02,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-20 17:56:02,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2020-07-20 17:56:02,595 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2020-07-20 17:56:02,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:56:02,596 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2020-07-20 17:56:02,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 17:56:02,596 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2020-07-20 17:56:02,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-20 17:56:02,597 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:56:02,597 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:56:02,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:56:02,812 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:56:02,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:56:02,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1236793761, now seen corresponding path program 1 times [2020-07-20 17:56:02,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:56:02,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127508693] [2020-07-20 17:56:02,815 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 [2020-07-20 17:56:02,860 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:56:02,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 17:56:02,861 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 17:56:02,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 17:56:02,871 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 17:56:02,886 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 17:56:02,887 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 17:56:03,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:56:03,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:56:03 BoogieIcfgContainer [2020-07-20 17:56:03,117 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 17:56:03,124 INFO L168 Benchmark]: Toolchain (without parser) took 1721.56 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 102.6 MB in the beginning and 139.7 MB in the end (delta: -37.1 MB). Peak memory consumption was 26.3 MB. Max. memory is 7.1 GB. [2020-07-20 17:56:03,126 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 17:56:03,127 INFO L168 Benchmark]: CACSL2BoogieTranslator took 342.62 ms. Allocated memory is still 137.9 MB. Free memory was 102.2 MB in the beginning and 92.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-20 17:56:03,129 INFO L168 Benchmark]: Boogie Preprocessor took 122.89 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 92.1 MB in the beginning and 180.5 MB in the end (delta: -88.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 7.1 GB. [2020-07-20 17:56:03,130 INFO L168 Benchmark]: RCFGBuilder took 330.60 ms. Allocated memory is still 201.3 MB. Free memory was 180.5 MB in the beginning and 166.5 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-07-20 17:56:03,131 INFO L168 Benchmark]: TraceAbstraction took 917.32 ms. Allocated memory is still 201.3 MB. Free memory was 166.5 MB in the beginning and 139.7 MB in the end (delta: 26.8 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. [2020-07-20 17:56:03,135 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 342.62 ms. Allocated memory is still 137.9 MB. Free memory was 102.2 MB in the beginning and 92.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 122.89 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 92.1 MB in the beginning and 180.5 MB in the end (delta: -88.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 330.60 ms. Allocated memory is still 201.3 MB. Free memory was 180.5 MB in the beginning and 166.5 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 917.32 ms. Allocated memory is still 201.3 MB. Free memory was 166.5 MB in the beginning and 139.7 MB in the end (delta: 26.8 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 8]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int x,y,z,w; [L15] EXPR w = 0 [L15] EXPR z = w = 0 [L15] EXPR y = z = w = 0 [L15] x = y = z = w = 0 VAL [w=0, x=0, y=0, z=0] [L16] COND FALSE !(__VERIFIER_nondet_int() && y < 10000) [L31] CALL __VERIFIER_assert(x >= 4 && y <= 2) VAL [\old(cond)=0] [L7] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L8] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 28 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 21 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 81 SizeOfPredicates, 0 NumberOfNonLiveVariables, 27 ConjunctsInSsa, 1 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...