/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_FUNCTIONS --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/trex03-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 14:19:44,348 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 14:19:44,351 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 14:19:44,372 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 14:19:44,372 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 14:19:44,374 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 14:19:44,376 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 14:19:44,387 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 14:19:44,393 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 14:19:44,397 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 14:19:44,399 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 14:19:44,400 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 14:19:44,401 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 14:19:44,403 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 14:19:44,405 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 14:19:44,407 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 14:19:44,408 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 14:19:44,409 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 14:19:44,413 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 14:19:44,418 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 14:19:44,425 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 14:19:44,429 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 14:19:44,431 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 14:19:44,432 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 14:19:44,435 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 14:19:44,448 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 14:19:44,449 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 14:19:44,450 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 14:19:44,452 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 14:19:44,489 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 14:19:44,489 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 14:19:44,492 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 14:19:44,497 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 14:19:44,497 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 14:19:44,497 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 14:19:44,498 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 14:19:44,498 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 14:19:44,498 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 14:19:44,498 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 14:19:44,498 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 14:19:44,498 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 14:19:44,498 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 14:19:44,498 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 14:19:44,499 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 14:19:44,499 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 14:19:44,499 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 14:19:44,499 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 14:19:44,499 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 14:19:44,499 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 14:19:44,500 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 14:19:44,500 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 14:19:44,500 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 14:19:44,503 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 14:19:44,504 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 14:19:44,504 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 14:19:44,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:19:44,504 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 14:19:44,505 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 14:19:44,505 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_FUNCTIONS 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 14:19:44,842 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 14:19:44,856 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 14:19:44,860 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 14:19:44,861 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 14:19:44,862 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 14:19:44,862 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/trex03-1.c [2020-07-20 14:19:44,936 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53f790a5d/5c6ab8e9563741fcb49259ad280259ae/FLAG80419e4fb [2020-07-20 14:19:45,438 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 14:19:45,439 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/trex03-1.c [2020-07-20 14:19:45,446 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53f790a5d/5c6ab8e9563741fcb49259ad280259ae/FLAG80419e4fb [2020-07-20 14:19:45,763 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53f790a5d/5c6ab8e9563741fcb49259ad280259ae [2020-07-20 14:19:45,772 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 14:19:45,774 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 14:19:45,776 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 14:19:45,776 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 14:19:45,782 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 14:19:45,784 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:19:45" (1/1) ... [2020-07-20 14:19:45,788 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23116018 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:45, skipping insertion in model container [2020-07-20 14:19:45,788 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:19:45" (1/1) ... [2020-07-20 14:19:45,798 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 14:19:45,822 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 14:19:46,025 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:19:46,031 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 14:19:46,052 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:19:46,069 INFO L208 MainTranslator]: Completed translation [2020-07-20 14:19:46,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:46 WrapperNode [2020-07-20 14:19:46,070 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 14:19:46,071 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 14:19:46,071 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 14:19:46,072 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 14:19:46,089 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:46" (1/1) ... [2020-07-20 14:19:46,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:46" (1/1) ... [2020-07-20 14:19:46,098 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:46" (1/1) ... [2020-07-20 14:19:46,098 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:46" (1/1) ... [2020-07-20 14:19:46,214 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:46" (1/1) ... [2020-07-20 14:19:46,222 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:46" (1/1) ... [2020-07-20 14:19:46,223 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:46" (1/1) ... [2020-07-20 14:19:46,225 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 14:19:46,226 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 14:19:46,226 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 14:19:46,226 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 14:19:46,227 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:46" (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 14:19:46,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 14:19:46,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 14:19:46,320 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 14:19:46,320 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 14:19:46,320 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 14:19:46,321 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 14:19:46,321 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-20 14:19:46,321 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 14:19:46,321 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 14:19:46,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 14:19:46,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 14:19:46,548 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 14:19:46,549 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 14:19:46,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:19:46 BoogieIcfgContainer [2020-07-20 14:19:46,553 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 14:19:46,555 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 14:19:46,555 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 14:19:46,559 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 14:19:46,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 02:19:45" (1/3) ... [2020-07-20 14:19:46,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a97533c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:19:46, skipping insertion in model container [2020-07-20 14:19:46,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:46" (2/3) ... [2020-07-20 14:19:46,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a97533c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:19:46, skipping insertion in model container [2020-07-20 14:19:46,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:19:46" (3/3) ... [2020-07-20 14:19:46,563 INFO L109 eAbstractionObserver]: Analyzing ICFG trex03-1.c [2020-07-20 14:19:46,576 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 14:19:46,585 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 14:19:46,602 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 14:19:46,629 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 14:19:46,630 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 14:19:46,630 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 14:19:46,630 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 14:19:46,630 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 14:19:46,630 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 14:19:46,631 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 14:19:46,631 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 14:19:46,651 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-07-20 14:19:46,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 14:19:46,659 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:19:46,659 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:19:46,660 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:19:46,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:19:46,665 INFO L82 PathProgramCache]: Analyzing trace with hash -859010367, now seen corresponding path program 1 times [2020-07-20 14:19:46,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:19:46,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [167378582] [2020-07-20 14:19:46,673 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 14:19:46,760 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 14:19:46,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:19:46,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 14:19:46,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:19:46,807 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 14:19:46,807 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:19:46,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [167378582] [2020-07-20 14:19:46,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:19:46,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 14:19:46,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207513507] [2020-07-20 14:19:46,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 14:19:46,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:19:46,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 14:19:46,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 14:19:46,842 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-07-20 14:19:46,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:19:46,871 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-07-20 14:19:46,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 14:19:46,873 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-20 14:19:46,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:19:46,882 INFO L225 Difference]: With dead ends: 33 [2020-07-20 14:19:46,882 INFO L226 Difference]: Without dead ends: 14 [2020-07-20 14:19:46,887 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 14:19:46,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-20 14:19:46,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-20 14:19:46,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-20 14:19:46,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-07-20 14:19:46,934 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2020-07-20 14:19:46,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:19:46,934 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-07-20 14:19:46,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 14:19:46,935 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-07-20 14:19:46,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 14:19:46,935 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:19:46,936 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:19:47,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:19:47,149 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:19:47,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:19:47,150 INFO L82 PathProgramCache]: Analyzing trace with hash -873786703, now seen corresponding path program 1 times [2020-07-20 14:19:47,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:19:47,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203578859] [2020-07-20 14:19:47,151 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 14:19:47,217 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:19:47,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 14:19:47,217 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 14:19:47,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 14:19:47,229 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 14:19:47,247 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 14:19:47,248 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 14:19:47,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:19:47,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 02:19:47 BoogieIcfgContainer [2020-07-20 14:19:47,490 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 14:19:47,494 INFO L168 Benchmark]: Toolchain (without parser) took 1718.66 ms. Allocated memory was 138.4 MB in the beginning and 205.0 MB in the end (delta: 66.6 MB). Free memory was 104.2 MB in the beginning and 142.0 MB in the end (delta: -37.8 MB). Peak memory consumption was 28.7 MB. Max. memory is 7.1 GB. [2020-07-20 14:19:47,496 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 14:19:47,497 INFO L168 Benchmark]: CACSL2BoogieTranslator took 295.14 ms. Allocated memory is still 138.4 MB. Free memory was 103.7 MB in the beginning and 94.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-20 14:19:47,499 INFO L168 Benchmark]: Boogie Preprocessor took 153.94 ms. Allocated memory was 138.4 MB in the beginning and 205.0 MB in the end (delta: 66.6 MB). Free memory was 94.1 MB in the beginning and 183.8 MB in the end (delta: -89.7 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. [2020-07-20 14:19:47,500 INFO L168 Benchmark]: RCFGBuilder took 328.19 ms. Allocated memory is still 205.0 MB. Free memory was 183.8 MB in the beginning and 170.9 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-07-20 14:19:47,501 INFO L168 Benchmark]: TraceAbstraction took 935.16 ms. Allocated memory is still 205.0 MB. Free memory was 170.3 MB in the beginning and 142.0 MB in the end (delta: 28.3 MB). Peak memory consumption was 28.3 MB. Max. memory is 7.1 GB. [2020-07-20 14:19:47,505 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 295.14 ms. Allocated memory is still 138.4 MB. Free memory was 103.7 MB in the beginning and 94.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 153.94 ms. Allocated memory was 138.4 MB in the beginning and 205.0 MB in the end (delta: 66.6 MB). Free memory was 94.1 MB in the beginning and 183.8 MB in the end (delta: -89.7 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 328.19 ms. Allocated memory is still 205.0 MB. Free memory was 183.8 MB in the beginning and 170.9 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 935.16 ms. Allocated memory is still 205.0 MB. Free memory was 170.3 MB in the beginning and 142.0 MB in the end (delta: 28.3 MB). Peak memory consumption was 28.3 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: [L15] unsigned int x1=__VERIFIER_nondet_uint(), x2=__VERIFIER_nondet_uint(), x3=__VERIFIER_nondet_uint(); [L15] unsigned int x1=__VERIFIER_nondet_uint(), x2=__VERIFIER_nondet_uint(), x3=__VERIFIER_nondet_uint(); [L15] unsigned int x1=__VERIFIER_nondet_uint(), x2=__VERIFIER_nondet_uint(), x3=__VERIFIER_nondet_uint(); [L16] unsigned int d1=1, d2=1, d3=1; [L17] _Bool c1=__VERIFIER_nondet_bool(), c2=__VERIFIER_nondet_bool(); [L17] _Bool c1=__VERIFIER_nondet_bool(), c2=__VERIFIER_nondet_bool(); [L19] COND FALSE !(x1>0 && x2>0 && x3>0) VAL [c1=3, c2=2, d1=1, d2=1, d3=1, x1=4294967297, x2=4294967296, x3=0] [L28] CALL __VERIFIER_assert(x1==0 && x2==0 && x3==0) 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, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 23 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=21occurred 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, 20 NumberOfCodeBlocks, 19 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 81 SizeOfPredicates, 0 NumberOfNonLiveVariables, 35 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...