/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/array-fpi/ifeqn4f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 13:59:46,267 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 13:59:46,269 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 13:59:46,282 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 13:59:46,282 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 13:59:46,283 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 13:59:46,285 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 13:59:46,286 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 13:59:46,288 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 13:59:46,289 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 13:59:46,290 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 13:59:46,292 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 13:59:46,292 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 13:59:46,293 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 13:59:46,294 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 13:59:46,295 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 13:59:46,296 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 13:59:46,297 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 13:59:46,299 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 13:59:46,301 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 13:59:46,302 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 13:59:46,303 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 13:59:46,305 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 13:59:46,305 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 13:59:46,308 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 13:59:46,311 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 13:59:46,311 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 13:59:46,312 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 13:59:46,313 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 13:59:46,314 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 13:59:46,314 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 13:59:46,315 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 13:59:46,315 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 13:59:46,315 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 13:59:46,316 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 13:59:46,317 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 13:59:46,318 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 13:59:46,332 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 13:59:46,332 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 13:59:46,334 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 13:59:46,334 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 13:59:46,334 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 13:59:46,334 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 13:59:46,334 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 13:59:46,335 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 13:59:46,335 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 13:59:46,335 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 13:59:46,335 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 13:59:46,335 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 13:59:46,336 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 13:59:46,336 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 13:59:46,336 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 13:59:46,336 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 13:59:46,336 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 13:59:46,337 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 13:59:46,337 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 13:59:46,337 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 13:59:46,337 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 13:59:46,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 13:59:46,338 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 13:59:46,338 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 13:59:46,338 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 13:59:46,338 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 13:59:46,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:59:46,339 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 13:59:46,339 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 13:59:46,339 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 13:59:46,661 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 13:59:46,675 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 13:59:46,679 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 13:59:46,680 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 13:59:46,681 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 13:59:46,682 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ifeqn4f.c [2020-07-21 13:59:46,745 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb79b506f/d5bf9bf801c048c2aca458f6727ae115/FLAGe14b4fd85 [2020-07-21 13:59:47,226 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 13:59:47,227 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ifeqn4f.c [2020-07-21 13:59:47,234 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb79b506f/d5bf9bf801c048c2aca458f6727ae115/FLAGe14b4fd85 [2020-07-21 13:59:47,627 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb79b506f/d5bf9bf801c048c2aca458f6727ae115 [2020-07-21 13:59:47,638 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 13:59:47,641 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 13:59:47,642 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 13:59:47,642 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 13:59:47,645 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 13:59:47,647 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:59:47" (1/1) ... [2020-07-21 13:59:47,650 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77512fde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:59:47, skipping insertion in model container [2020-07-21 13:59:47,650 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:59:47" (1/1) ... [2020-07-21 13:59:47,659 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 13:59:47,676 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 13:59:47,885 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 13:59:47,896 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 13:59:47,919 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 13:59:47,935 INFO L208 MainTranslator]: Completed translation [2020-07-21 13:59:47,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:59:47 WrapperNode [2020-07-21 13:59:47,936 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 13:59:47,937 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 13:59:47,937 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 13:59:47,937 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 13:59:48,036 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:59:47" (1/1) ... [2020-07-21 13:59:48,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:59:47" (1/1) ... [2020-07-21 13:59:48,051 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:59:47" (1/1) ... [2020-07-21 13:59:48,051 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:59:47" (1/1) ... [2020-07-21 13:59:48,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:59:47" (1/1) ... [2020-07-21 13:59:48,079 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:59:47" (1/1) ... [2020-07-21 13:59:48,088 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:59:47" (1/1) ... [2020-07-21 13:59:48,093 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 13:59:48,094 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 13:59:48,094 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 13:59:48,094 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 13:59:48,095 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:59:47" (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 13:59:48,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 13:59:48,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 13:59:48,180 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 13:59:48,180 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 13:59:48,181 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 13:59:48,181 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 13:59:48,181 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 13:59:48,181 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 13:59:48,181 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 13:59:48,182 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 13:59:48,182 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 13:59:48,182 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 13:59:48,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 13:59:48,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 13:59:48,182 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 13:59:48,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 13:59:48,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 13:59:48,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 13:59:48,513 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 13:59:48,513 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-21 13:59:48,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:59:48 BoogieIcfgContainer [2020-07-21 13:59:48,521 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 13:59:48,522 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 13:59:48,522 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 13:59:48,526 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 13:59:48,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:59:47" (1/3) ... [2020-07-21 13:59:48,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a90bbd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:59:48, skipping insertion in model container [2020-07-21 13:59:48,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:59:47" (2/3) ... [2020-07-21 13:59:48,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a90bbd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:59:48, skipping insertion in model container [2020-07-21 13:59:48,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:59:48" (3/3) ... [2020-07-21 13:59:48,530 INFO L109 eAbstractionObserver]: Analyzing ICFG ifeqn4f.c [2020-07-21 13:59:48,541 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 13:59:48,548 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 13:59:48,563 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 13:59:48,586 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 13:59:48,586 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 13:59:48,586 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 13:59:48,586 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 13:59:48,587 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 13:59:48,587 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 13:59:48,587 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 13:59:48,587 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 13:59:48,605 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-07-21 13:59:48,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 13:59:48,610 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:59:48,611 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:59:48,612 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:59:48,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:59:48,617 INFO L82 PathProgramCache]: Analyzing trace with hash -294712258, now seen corresponding path program 1 times [2020-07-21 13:59:48,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:59:48,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931781022] [2020-07-21 13:59:48,626 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 13:59:48,749 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 13:59:48,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:59:48,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 13:59:48,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:59:48,820 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 13:59:48,821 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:59:48,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931781022] [2020-07-21 13:59:48,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:59:48,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 13:59:48,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466706831] [2020-07-21 13:59:48,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 13:59:48,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:59:48,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 13:59:48,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 13:59:48,845 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 4 states. [2020-07-21 13:59:48,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:59:48,984 INFO L93 Difference]: Finished difference Result 76 states and 104 transitions. [2020-07-21 13:59:48,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 13:59:48,987 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-07-21 13:59:48,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:59:48,998 INFO L225 Difference]: With dead ends: 76 [2020-07-21 13:59:48,999 INFO L226 Difference]: Without dead ends: 41 [2020-07-21 13:59:49,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 13:59:49,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-21 13:59:49,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-07-21 13:59:49,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 13:59:49,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-07-21 13:59:49,064 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2020-07-21 13:59:49,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:59:49,065 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-07-21 13:59:49,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 13:59:49,065 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-07-21 13:59:49,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 13:59:49,066 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:59:49,067 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:59:49,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:59:49,268 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:59:49,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:59:49,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1477618916, now seen corresponding path program 1 times [2020-07-21 13:59:49,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:59:49,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71016281] [2020-07-21 13:59:49,271 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 13:59:49,335 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:59:49,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:59:49,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 13:59:49,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:59:49,389 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-21 13:59:49,390 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:59:49,394 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:59:49,395 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:59:49,395 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-07-21 13:59:49,433 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:59:49,434 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-07-21 13:59:49,435 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-07-21 13:59:49,448 INFO L624 ElimStorePlain]: treesize reduction 9, result has 43.8 percent of original size [2020-07-21 13:59:49,449 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:59:49,449 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:7 [2020-07-21 13:59:49,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 13:59:49,485 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:59:49,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71016281] [2020-07-21 13:59:49,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:59:49,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 13:59:49,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277707018] [2020-07-21 13:59:49,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 13:59:49,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:59:49,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 13:59:49,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-21 13:59:49,490 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2020-07-21 13:59:49,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:59:49,636 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-07-21 13:59:49,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 13:59:49,637 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-07-21 13:59:49,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:59:49,639 INFO L225 Difference]: With dead ends: 52 [2020-07-21 13:59:49,639 INFO L226 Difference]: Without dead ends: 50 [2020-07-21 13:59:49,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-07-21 13:59:49,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-21 13:59:49,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2020-07-21 13:59:49,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-21 13:59:49,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-07-21 13:59:49,652 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 28 [2020-07-21 13:59:49,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:59:49,653 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-07-21 13:59:49,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 13:59:49,653 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-07-21 13:59:49,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 13:59:49,655 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:59:49,655 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:59:49,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:59:49,868 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:59:49,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:59:49,869 INFO L82 PathProgramCache]: Analyzing trace with hash -797560546, now seen corresponding path program 1 times [2020-07-21 13:59:49,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:59:49,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [246148451] [2020-07-21 13:59:49,884 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 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:59:49,971 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:59:49,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:59:49,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 13:59:49,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:59:49,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 13:59:49,986 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:59:49,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [246148451] [2020-07-21 13:59:49,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:59:49,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 13:59:49,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851237655] [2020-07-21 13:59:49,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 13:59:49,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:59:49,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 13:59:49,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:59:49,988 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 3 states. [2020-07-21 13:59:50,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:59:50,045 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2020-07-21 13:59:50,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 13:59:50,046 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-07-21 13:59:50,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:59:50,047 INFO L225 Difference]: With dead ends: 74 [2020-07-21 13:59:50,047 INFO L226 Difference]: Without dead ends: 45 [2020-07-21 13:59:50,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:59:50,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-21 13:59:50,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2020-07-21 13:59:50,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 13:59:50,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-07-21 13:59:50,057 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 28 [2020-07-21 13:59:50,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:59:50,057 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-07-21 13:59:50,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 13:59:50,058 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-07-21 13:59:50,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-21 13:59:50,059 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:59:50,059 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:59:50,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:59:50,275 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:59:50,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:59:50,275 INFO L82 PathProgramCache]: Analyzing trace with hash -622618382, now seen corresponding path program 1 times [2020-07-21 13:59:50,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:59:50,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314367356] [2020-07-21 13:59:50,276 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 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:59:50,340 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:59:50,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:59:50,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 13:59:50,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:59:50,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 13:59:50,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:59:50,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 13:59:50,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314367356] [2020-07-21 13:59:50,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:59:50,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-21 13:59:50,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365748178] [2020-07-21 13:59:50,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 13:59:50,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:59:50,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 13:59:50,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-21 13:59:50,497 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 9 states. [2020-07-21 13:59:50,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:59:50,732 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2020-07-21 13:59:50,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 13:59:50,733 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-07-21 13:59:50,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:59:50,735 INFO L225 Difference]: With dead ends: 91 [2020-07-21 13:59:50,735 INFO L226 Difference]: Without dead ends: 55 [2020-07-21 13:59:50,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-07-21 13:59:50,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-21 13:59:50,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2020-07-21 13:59:50,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 13:59:50,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-07-21 13:59:50,744 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 36 [2020-07-21 13:59:50,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:59:50,745 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-07-21 13:59:50,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 13:59:50,745 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-07-21 13:59:50,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-21 13:59:50,746 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:59:50,747 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:59:50,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:59:50,961 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:59:50,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:59:50,962 INFO L82 PathProgramCache]: Analyzing trace with hash 60389999, now seen corresponding path program 1 times [2020-07-21 13:59:50,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:59:50,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [140702226] [2020-07-21 13:59:50,962 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 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:59:51,041 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:59:51,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 13:59:51,041 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 13:59:51,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 13:59:51,064 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 13:59:51,094 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 13:59:51,094 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 13:59:51,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:59:51,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:59:51 BoogieIcfgContainer [2020-07-21 13:59:51,360 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 13:59:51,362 INFO L168 Benchmark]: Toolchain (without parser) took 3722.46 ms. Allocated memory was 143.7 MB in the beginning and 231.2 MB in the end (delta: 87.6 MB). Free memory was 99.8 MB in the beginning and 113.9 MB in the end (delta: -14.1 MB). Peak memory consumption was 73.5 MB. Max. memory is 7.1 GB. [2020-07-21 13:59:51,363 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 143.7 MB. Free memory was 118.6 MB in the beginning and 118.4 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-21 13:59:51,366 INFO L168 Benchmark]: CACSL2BoogieTranslator took 294.90 ms. Allocated memory is still 143.7 MB. Free memory was 99.4 MB in the beginning and 89.0 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-21 13:59:51,367 INFO L168 Benchmark]: Boogie Preprocessor took 156.73 ms. Allocated memory was 143.7 MB in the beginning and 200.8 MB in the end (delta: 57.1 MB). Free memory was 89.0 MB in the beginning and 177.8 MB in the end (delta: -88.7 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-21 13:59:51,368 INFO L168 Benchmark]: RCFGBuilder took 427.36 ms. Allocated memory is still 200.8 MB. Free memory was 177.8 MB in the beginning and 160.7 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. [2020-07-21 13:59:51,368 INFO L168 Benchmark]: TraceAbstraction took 2837.83 ms. Allocated memory was 200.8 MB in the beginning and 231.2 MB in the end (delta: 30.4 MB). Free memory was 160.1 MB in the beginning and 113.9 MB in the end (delta: 46.2 MB). Peak memory consumption was 76.6 MB. Max. memory is 7.1 GB. [2020-07-21 13:59:51,372 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 143.7 MB. Free memory was 118.6 MB in the beginning and 118.4 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 294.90 ms. Allocated memory is still 143.7 MB. Free memory was 99.4 MB in the beginning and 89.0 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 156.73 ms. Allocated memory was 143.7 MB in the beginning and 200.8 MB in the end (delta: 57.1 MB). Free memory was 89.0 MB in the beginning and 177.8 MB in the end (delta: -88.7 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 427.36 ms. Allocated memory is still 200.8 MB. Free memory was 177.8 MB in the beginning and 160.7 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2837.83 ms. Allocated memory was 200.8 MB in the beginning and 231.2 MB in the end (delta: 30.4 MB). Free memory was 160.1 MB in the beginning and 113.9 MB in the end (delta: 46.2 MB). Peak memory consumption was 76.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; VAL [\old(N)=6, N=0] [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=2] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=2] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=2] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=2] [L25] int i; [L26] long long *a = malloc(sizeof(long long)*N); [L27] long long *b = malloc(sizeof(long long)*N); [L29] i=0 VAL [\old(N)=0, a={1:0}, b={-1:0}, i=0, malloc(sizeof(long long)*N)={-1:0}, malloc(sizeof(long long)*N)={1:0}, N=2] [L29] COND TRUE i