/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 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/trex01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 14:01:46,378 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 14:01:46,380 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 14:01:46,397 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 14:01:46,398 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 14:01:46,399 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 14:01:46,400 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 14:01:46,402 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 14:01:46,403 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 14:01:46,404 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 14:01:46,405 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 14:01:46,406 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 14:01:46,407 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 14:01:46,408 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 14:01:46,409 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 14:01:46,410 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 14:01:46,410 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 14:01:46,411 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 14:01:46,413 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 14:01:46,415 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 14:01:46,416 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 14:01:46,417 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 14:01:46,419 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 14:01:46,419 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 14:01:46,422 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 14:01:46,422 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 14:01:46,422 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 14:01:46,423 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 14:01:46,424 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 14:01:46,425 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 14:01:46,425 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 14:01:46,426 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 14:01:46,426 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 14:01:46,427 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 14:01:46,428 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 14:01:46,428 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 14:01:46,429 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 14:01:46,429 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 14:01:46,430 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 14:01:46,430 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 14:01:46,431 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 14:01:46,432 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 14:01:46,447 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 14:01:46,447 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 14:01:46,448 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 14:01:46,449 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 14:01:46,449 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 14:01:46,449 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 14:01:46,449 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 14:01:46,449 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 14:01:46,450 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 14:01:46,450 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 14:01:46,450 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 14:01:46,450 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 14:01:46,450 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 14:01:46,451 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 14:01:46,451 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 14:01:46,451 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 14:01:46,451 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 14:01:46,451 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 14:01:46,452 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 14:01:46,452 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 14:01:46,452 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 14:01:46,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 14:01:46,452 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 14:01:46,453 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 14:01:46,453 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 14:01:46,453 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 14:01:46,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:01:46,453 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 14:01:46,454 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 14:01:46,454 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 -> 2 [2020-07-21 14:01:46,728 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 14:01:46,742 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 14:01:46,746 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 14:01:46,748 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 14:01:46,748 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 14:01:46,749 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/trex01-1.c [2020-07-21 14:01:46,809 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94a9728fd/60d46806eb994520aa4d3e875fed1a8d/FLAG85a9cbeb2 [2020-07-21 14:01:47,279 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 14:01:47,281 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/trex01-1.c [2020-07-21 14:01:47,288 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94a9728fd/60d46806eb994520aa4d3e875fed1a8d/FLAG85a9cbeb2 [2020-07-21 14:01:47,660 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94a9728fd/60d46806eb994520aa4d3e875fed1a8d [2020-07-21 14:01:47,673 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 14:01:47,676 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 14:01:47,677 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 14:01:47,678 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 14:01:47,681 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 14:01:47,683 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:01:47" (1/1) ... [2020-07-21 14:01:47,686 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bd08649 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:47, skipping insertion in model container [2020-07-21 14:01:47,686 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:01:47" (1/1) ... [2020-07-21 14:01:47,695 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 14:01:47,714 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 14:01:47,900 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:01:47,905 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 14:01:47,923 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:01:47,938 INFO L208 MainTranslator]: Completed translation [2020-07-21 14:01:47,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:47 WrapperNode [2020-07-21 14:01:47,939 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 14:01:47,940 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 14:01:47,940 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 14:01:47,940 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 14:01:47,955 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:47" (1/1) ... [2020-07-21 14:01:47,955 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:47" (1/1) ... [2020-07-21 14:01:47,961 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:47" (1/1) ... [2020-07-21 14:01:47,961 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:47" (1/1) ... [2020-07-21 14:01:48,050 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:47" (1/1) ... [2020-07-21 14:01:48,057 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:47" (1/1) ... [2020-07-21 14:01:48,058 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:47" (1/1) ... [2020-07-21 14:01:48,060 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 14:01:48,061 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 14:01:48,061 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 14:01:48,061 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 14:01:48,062 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:47" (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 14:01:48,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 14:01:48,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 14:01:48,133 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 14:01:48,133 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-07-21 14:01:48,134 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 14:01:48,134 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 14:01:48,134 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 14:01:48,134 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 14:01:48,134 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 14:01:48,134 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-07-21 14:01:48,135 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 14:01:48,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 14:01:48,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 14:01:48,361 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 14:01:48,361 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-21 14:01:48,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:01:48 BoogieIcfgContainer [2020-07-21 14:01:48,366 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 14:01:48,367 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 14:01:48,367 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 14:01:48,371 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 14:01:48,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:01:47" (1/3) ... [2020-07-21 14:01:48,372 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c1306be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:01:48, skipping insertion in model container [2020-07-21 14:01:48,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:47" (2/3) ... [2020-07-21 14:01:48,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c1306be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:01:48, skipping insertion in model container [2020-07-21 14:01:48,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:01:48" (3/3) ... [2020-07-21 14:01:48,375 INFO L109 eAbstractionObserver]: Analyzing ICFG trex01-1.c [2020-07-21 14:01:48,388 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 14:01:48,397 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 14:01:48,422 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 14:01:48,473 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 14:01:48,473 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 14:01:48,473 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 14:01:48,473 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 14:01:48,473 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 14:01:48,474 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 14:01:48,474 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 14:01:48,474 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 14:01:48,502 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-07-21 14:01:48,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 14:01:48,511 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:01:48,512 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:01:48,512 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:01:48,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:01:48,519 INFO L82 PathProgramCache]: Analyzing trace with hash -355556993, now seen corresponding path program 1 times [2020-07-21 14:01:48,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:01:48,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1936560323] [2020-07-21 14:01:48,530 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 14:01:48,609 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:01:48,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:01:48,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 14:01:48,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:01:48,643 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 14:01:48,644 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:01:48,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1936560323] [2020-07-21 14:01:48,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:01:48,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 14:01:48,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120252199] [2020-07-21 14:01:48,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 14:01:48,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:01:48,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 14:01:48,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 14:01:48,669 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2020-07-21 14:01:48,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:01:48,698 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2020-07-21 14:01:48,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 14:01:48,699 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-07-21 14:01:48,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:01:48,710 INFO L225 Difference]: With dead ends: 45 [2020-07-21 14:01:48,710 INFO L226 Difference]: Without dead ends: 16 [2020-07-21 14:01:48,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 14:01:48,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-07-21 14:01:48,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-07-21 14:01:48,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-07-21 14:01:48,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-07-21 14:01:48,758 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 14 [2020-07-21 14:01:48,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:01:48,759 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-07-21 14:01:48,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 14:01:48,759 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-07-21 14:01:48,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 14:01:48,760 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:01:48,761 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:01:48,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:01:48,985 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:01:48,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:01:48,986 INFO L82 PathProgramCache]: Analyzing trace with hash -359251077, now seen corresponding path program 1 times [2020-07-21 14:01:48,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:01:48,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516683948] [2020-07-21 14:01:48,988 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 14:01:49,031 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:01:49,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 14:01:49,032 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 14:01:49,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 14:01:49,044 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 14:01:49,061 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 14:01:49,061 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 14:01:49,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:01:49,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 02:01:49 BoogieIcfgContainer [2020-07-21 14:01:49,297 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 14:01:49,301 INFO L168 Benchmark]: Toolchain (without parser) took 1625.45 ms. Allocated memory was 136.3 MB in the beginning and 200.8 MB in the end (delta: 64.5 MB). Free memory was 99.9 MB in the beginning and 136.0 MB in the end (delta: -36.1 MB). Peak memory consumption was 28.4 MB. Max. memory is 7.1 GB. [2020-07-21 14:01:49,302 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 136.3 MB. Free memory was 118.1 MB in the beginning and 117.9 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 14:01:49,303 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.80 ms. Allocated memory is still 136.3 MB. Free memory was 99.5 MB in the beginning and 89.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-21 14:01:49,304 INFO L168 Benchmark]: Boogie Preprocessor took 120.74 ms. Allocated memory was 136.3 MB in the beginning and 200.8 MB in the end (delta: 64.5 MB). Free memory was 89.9 MB in the beginning and 179.4 MB in the end (delta: -89.6 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. [2020-07-21 14:01:49,305 INFO L168 Benchmark]: RCFGBuilder took 304.86 ms. Allocated memory is still 200.8 MB. Free memory was 179.4 MB in the beginning and 165.4 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-07-21 14:01:49,306 INFO L168 Benchmark]: TraceAbstraction took 930.35 ms. Allocated memory is still 200.8 MB. Free memory was 165.4 MB in the beginning and 136.0 MB in the end (delta: 29.4 MB). Peak memory consumption was 29.4 MB. Max. memory is 7.1 GB. [2020-07-21 14:01:49,311 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 136.3 MB. Free memory was 118.1 MB in the beginning and 117.9 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 261.80 ms. Allocated memory is still 136.3 MB. Free memory was 99.5 MB in the beginning and 89.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 120.74 ms. Allocated memory was 136.3 MB in the beginning and 200.8 MB in the end (delta: 64.5 MB). Free memory was 89.9 MB in the beginning and 179.4 MB in the end (delta: -89.6 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 304.86 ms. Allocated memory is still 200.8 MB. Free memory was 179.4 MB in the beginning and 165.4 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 930.35 ms. Allocated memory is still 200.8 MB. Free memory was 165.4 MB in the beginning and 136.0 MB in the end (delta: 29.4 MB). Peak memory consumption was 29.4 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: [L34] _Bool c = __VERIFIER_nondet_bool(); [L35] COND FALSE !(\read(c)) VAL [c=0] [L38] CALL f(2) VAL [\old(d)=2] [L13] int x = __VERIFIER_nondet_int(), y = __VERIFIER_nondet_int(), k = __VERIFIER_nondet_int(), z = 1; [L13] int x = __VERIFIER_nondet_int(), y = __VERIFIER_nondet_int(), k = __VERIFIER_nondet_int(), z = 1; [L13] int x = __VERIFIER_nondet_int(), y = __VERIFIER_nondet_int(), k = __VERIFIER_nondet_int(), z = 1; [L13] int x = __VERIFIER_nondet_int(), y = __VERIFIER_nondet_int(), k = __VERIFIER_nondet_int(), z = 1; VAL [\old(d)=2, d=2, k=0, x=0, y=0, z=1] [L14] COND FALSE !(!(k <= 1073741823)) VAL [\old(d)=2, d=2, k=0, x=0, y=0, z=1] [L17] COND FALSE !(z < k) VAL [\old(d)=2, d=2, k=0, x=0, y=0, z=1] [L18] CALL __VERIFIER_assert(z>=2) 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 5 procedures, 28 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: 33 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred 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, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 13 ConstructedInterpolants, 0 QuantifiedInterpolants, 169 SizeOfPredicates, 0 NumberOfNonLiveVariables, 45 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...