/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test24-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 22:41:44,275 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 22:41:44,277 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 22:41:44,290 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 22:41:44,291 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 22:41:44,292 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 22:41:44,293 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 22:41:44,295 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 22:41:44,297 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 22:41:44,298 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 22:41:44,299 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 22:41:44,300 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 22:41:44,300 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 22:41:44,301 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 22:41:44,303 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 22:41:44,304 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 22:41:44,304 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 22:41:44,305 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 22:41:44,307 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 22:41:44,309 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 22:41:44,311 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 22:41:44,312 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 22:41:44,313 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 22:41:44,314 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 22:41:44,316 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 22:41:44,327 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 22:41:44,328 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 22:41:44,329 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 22:41:44,330 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 22:41:44,345 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 22:41:44,345 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 22:41:44,346 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 22:41:44,347 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 22:41:44,347 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 22:41:44,347 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 22:41:44,347 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 22:41:44,348 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 22:41:44,348 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 22:41:44,348 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 22:41:44,348 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 22:41:44,348 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 22:41:44,349 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 22:41:44,349 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 22:41:44,349 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 22:41:44,349 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 22:41:44,349 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 22:41:44,350 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 22:41:44,350 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 22:41:44,350 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 22:41:44,350 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 22:41:44,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:41:44,351 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 22:41:44,351 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 22:41:44,351 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 22:41:44,351 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 22:41:44,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:41:44,352 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 22:41:44,352 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 22:41:44,352 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 22:41:44,684 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 22:41:44,698 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 22:41:44,701 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 22:41:44,703 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 22:41:44,703 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 22:41:44,704 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test24-2.c [2020-07-21 22:41:44,766 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46769bce2/06f08e7df13a4cdcb54989f4ad762c48/FLAG499666603 [2020-07-21 22:41:45,165 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 22:41:45,166 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test24-2.c [2020-07-21 22:41:45,175 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46769bce2/06f08e7df13a4cdcb54989f4ad762c48/FLAG499666603 [2020-07-21 22:41:45,529 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46769bce2/06f08e7df13a4cdcb54989f4ad762c48 [2020-07-21 22:41:45,539 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 22:41:45,542 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 22:41:45,543 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 22:41:45,543 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 22:41:45,549 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 22:41:45,551 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:41:45" (1/1) ... [2020-07-21 22:41:45,554 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44ee2b8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:45, skipping insertion in model container [2020-07-21 22:41:45,554 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:41:45" (1/1) ... [2020-07-21 22:41:45,563 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 22:41:45,582 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 22:41:45,763 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:41:45,771 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 22:41:45,790 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:41:45,805 INFO L208 MainTranslator]: Completed translation [2020-07-21 22:41:45,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:45 WrapperNode [2020-07-21 22:41:45,806 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 22:41:45,807 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 22:41:45,807 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 22:41:45,807 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 22:41:45,909 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:45" (1/1) ... [2020-07-21 22:41:45,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:45" (1/1) ... [2020-07-21 22:41:45,921 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:45" (1/1) ... [2020-07-21 22:41:45,921 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:45" (1/1) ... [2020-07-21 22:41:45,929 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:45" (1/1) ... [2020-07-21 22:41:45,935 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:45" (1/1) ... [2020-07-21 22:41:45,936 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:45" (1/1) ... [2020-07-21 22:41:45,938 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 22:41:45,939 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 22:41:45,939 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 22:41:45,939 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 22:41:45,940 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:45" (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 22:41:46,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 22:41:46,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 22:41:46,006 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-07-21 22:41:46,006 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 22:41:46,007 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 22:41:46,007 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 22:41:46,007 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 22:41:46,007 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 22:41:46,007 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 22:41:46,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 22:41:46,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 22:41:46,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 22:41:46,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 22:41:46,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 22:41:46,329 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 22:41:46,329 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-21 22:41:46,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:41:46 BoogieIcfgContainer [2020-07-21 22:41:46,333 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 22:41:46,334 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 22:41:46,335 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 22:41:46,338 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 22:41:46,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:41:45" (1/3) ... [2020-07-21 22:41:46,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ec46d47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:41:46, skipping insertion in model container [2020-07-21 22:41:46,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:45" (2/3) ... [2020-07-21 22:41:46,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ec46d47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:41:46, skipping insertion in model container [2020-07-21 22:41:46,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:41:46" (3/3) ... [2020-07-21 22:41:46,342 INFO L109 eAbstractionObserver]: Analyzing ICFG test24-2.c [2020-07-21 22:41:46,353 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 22:41:46,360 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 22:41:46,374 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 22:41:46,402 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 22:41:46,402 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 22:41:46,403 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 22:41:46,403 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 22:41:46,403 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 22:41:46,403 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 22:41:46,403 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 22:41:46,403 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 22:41:46,424 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-07-21 22:41:46,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 22:41:46,429 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:41:46,430 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:41:46,431 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:41:46,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:41:46,437 INFO L82 PathProgramCache]: Analyzing trace with hash 855240046, now seen corresponding path program 1 times [2020-07-21 22:41:46,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:41:46,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1577086603] [2020-07-21 22:41:46,447 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:41:46,546 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:41:46,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:41:46,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 22:41:46,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:41:46,575 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 22:41:46,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:41:46,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1577086603] [2020-07-21 22:41:46,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:41:46,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 22:41:46,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331265517] [2020-07-21 22:41:46,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 22:41:46,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:41:46,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 22:41:46,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 22:41:46,598 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2020-07-21 22:41:46,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:41:46,617 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2020-07-21 22:41:46,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 22:41:46,618 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2020-07-21 22:41:46,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:41:46,626 INFO L225 Difference]: With dead ends: 42 [2020-07-21 22:41:46,626 INFO L226 Difference]: Without dead ends: 20 [2020-07-21 22:41:46,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 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 22:41:46,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-21 22:41:46,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-07-21 22:41:46,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-21 22:41:46,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-07-21 22:41:46,662 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-07-21 22:41:46,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:41:46,663 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-07-21 22:41:46,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 22:41:46,663 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-07-21 22:41:46,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 22:41:46,664 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:41:46,665 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:41:46,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:41:46,867 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:41:46,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:41:46,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1631497781, now seen corresponding path program 1 times [2020-07-21 22:41:46,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:41:46,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188875533] [2020-07-21 22:41:46,869 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:41:46,921 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:41:46,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:41:46,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 22:41:46,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:41:46,953 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 22:41:46,953 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:41:46,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1188875533] [2020-07-21 22:41:46,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:41:46,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:41:46,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627402464] [2020-07-21 22:41:46,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:41:46,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:41:46,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:41:46,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:41:46,958 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 3 states. [2020-07-21 22:41:46,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:41:46,979 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-07-21 22:41:46,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:41:46,980 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-21 22:41:46,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:41:46,981 INFO L225 Difference]: With dead ends: 34 [2020-07-21 22:41:46,981 INFO L226 Difference]: Without dead ends: 22 [2020-07-21 22:41:46,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 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 22:41:46,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-21 22:41:46,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-07-21 22:41:46,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 22:41:46,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-21 22:41:46,989 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2020-07-21 22:41:46,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:41:46,990 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-21 22:41:46,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:41:46,990 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-21 22:41:46,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 22:41:46,991 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:41:46,992 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] [2020-07-21 22:41:47,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:41:47,207 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:41:47,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:41:47,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1934775405, now seen corresponding path program 1 times [2020-07-21 22:41:47,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:41:47,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050516022] [2020-07-21 22:41:47,210 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 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 22:41:47,287 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:41:47,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:41:47,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:41:47,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:41:47,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:41:47,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:41:47,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:41:47,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050516022] [2020-07-21 22:41:47,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:41:47,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-21 22:41:47,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377611456] [2020-07-21 22:41:47,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 22:41:47,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:41:47,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 22:41:47,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-21 22:41:47,385 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 6 states. [2020-07-21 22:41:47,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:41:47,419 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-07-21 22:41:47,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 22:41:47,420 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-07-21 22:41:47,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:41:47,421 INFO L225 Difference]: With dead ends: 39 [2020-07-21 22:41:47,421 INFO L226 Difference]: Without dead ends: 27 [2020-07-21 22:41:47,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-21 22:41:47,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-21 22:41:47,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-21 22:41:47,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 22:41:47,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-21 22:41:47,428 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 20 [2020-07-21 22:41:47,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:41:47,429 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-21 22:41:47,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 22:41:47,429 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-21 22:41:47,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 22:41:47,430 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:41:47,430 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:41:47,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:41:47,645 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:41:47,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:41:47,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1523652947, now seen corresponding path program 2 times [2020-07-21 22:41:47,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:41:47,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [272215155] [2020-07-21 22:41:47,648 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 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 22:41:47,758 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:41:47,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:41:47,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 22:41:47,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:41:47,824 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:41:47,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:41:47,948 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:41:47,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [272215155] [2020-07-21 22:41:47,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:41:47,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-07-21 22:41:47,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871792864] [2020-07-21 22:41:47,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 22:41:47,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:41:47,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 22:41:47,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-07-21 22:41:47,951 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 12 states. [2020-07-21 22:41:48,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:41:48,013 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2020-07-21 22:41:48,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:41:48,014 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2020-07-21 22:41:48,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:41:48,015 INFO L225 Difference]: With dead ends: 51 [2020-07-21 22:41:48,015 INFO L226 Difference]: Without dead ends: 39 [2020-07-21 22:41:48,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-07-21 22:41:48,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-21 22:41:48,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-21 22:41:48,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-21 22:41:48,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-07-21 22:41:48,024 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 26 [2020-07-21 22:41:48,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:41:48,024 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-07-21 22:41:48,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 22:41:48,024 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-07-21 22:41:48,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-21 22:41:48,026 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:41:48,026 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:41:48,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:41:48,240 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:41:48,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:41:48,241 INFO L82 PathProgramCache]: Analyzing trace with hash 758560159, now seen corresponding path program 3 times [2020-07-21 22:41:48,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:41:48,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83373355] [2020-07-21 22:41:48,243 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 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 22:41:48,404 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:41:48,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:41:48,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 22:41:48,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:41:48,551 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:41:48,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:41:48,789 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:41:48,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83373355] [2020-07-21 22:41:48,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:41:48,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2020-07-21 22:41:48,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932627453] [2020-07-21 22:41:48,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 22:41:48,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:41:48,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 22:41:48,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-07-21 22:41:48,793 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 22 states. [2020-07-21 22:41:48,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:41:48,892 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2020-07-21 22:41:48,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-21 22:41:48,893 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 38 [2020-07-21 22:41:48,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:41:48,894 INFO L225 Difference]: With dead ends: 71 [2020-07-21 22:41:48,895 INFO L226 Difference]: Without dead ends: 59 [2020-07-21 22:41:48,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-07-21 22:41:48,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-21 22:41:48,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-07-21 22:41:48,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-21 22:41:48,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-07-21 22:41:48,905 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 38 [2020-07-21 22:41:48,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:41:48,905 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-07-21 22:41:48,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 22:41:48,906 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-07-21 22:41:48,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-21 22:41:48,907 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:41:48,908 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:41:49,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:41:49,123 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:41:49,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:41:49,124 INFO L82 PathProgramCache]: Analyzing trace with hash -2067273869, now seen corresponding path program 4 times [2020-07-21 22:41:49,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:41:49,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1549577430] [2020-07-21 22:41:49,125 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 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:42:06,695 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:42:06,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 22:42:06,695 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 22:42:10,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 22:42:10,429 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 22:42:10,625 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 22:42:10,626 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 22:42:10,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:42:10,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 10:42:10 BoogieIcfgContainer [2020-07-21 22:42:10,894 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 22:42:10,897 INFO L168 Benchmark]: Toolchain (without parser) took 25355.68 ms. Allocated memory was 135.3 MB in the beginning and 227.0 MB in the end (delta: 91.8 MB). Free memory was 99.7 MB in the beginning and 75.1 MB in the end (delta: 24.6 MB). Peak memory consumption was 116.4 MB. Max. memory is 7.1 GB. [2020-07-21 22:42:10,898 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 135.3 MB. Free memory was 118.3 MB in the beginning and 118.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 22:42:10,899 INFO L168 Benchmark]: CACSL2BoogieTranslator took 263.22 ms. Allocated memory is still 135.3 MB. Free memory was 99.3 MB in the beginning and 88.9 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-21 22:42:10,900 INFO L168 Benchmark]: Boogie Preprocessor took 131.78 ms. Allocated memory was 135.3 MB in the beginning and 200.3 MB in the end (delta: 65.0 MB). Free memory was 88.9 MB in the beginning and 177.6 MB in the end (delta: -88.6 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-07-21 22:42:10,901 INFO L168 Benchmark]: RCFGBuilder took 394.55 ms. Allocated memory is still 200.3 MB. Free memory was 177.6 MB in the beginning and 161.6 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. [2020-07-21 22:42:10,902 INFO L168 Benchmark]: TraceAbstraction took 24559.84 ms. Allocated memory was 200.3 MB in the beginning and 227.0 MB in the end (delta: 26.7 MB). Free memory was 161.6 MB in the beginning and 75.1 MB in the end (delta: 86.5 MB). Peak memory consumption was 113.2 MB. Max. memory is 7.1 GB. [2020-07-21 22:42:10,906 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 135.3 MB. Free memory was 118.3 MB in the beginning and 118.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 263.22 ms. Allocated memory is still 135.3 MB. Free memory was 99.3 MB in the beginning and 88.9 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 131.78 ms. Allocated memory was 135.3 MB in the beginning and 200.3 MB in the end (delta: 65.0 MB). Free memory was 88.9 MB in the beginning and 177.6 MB in the end (delta: -88.6 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 394.55 ms. Allocated memory is still 200.3 MB. Free memory was 177.6 MB in the beginning and 161.6 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 24559.84 ms. Allocated memory was 200.3 MB in the beginning and 227.0 MB in the end (delta: 26.7 MB). Free memory was 161.6 MB in the beginning and 75.1 MB in the end (delta: 86.5 MB). Peak memory consumption was 113.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 37]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L15] struct dummy ad1[20], *ad2; [L16] int i, j, *pa; [L17] j=0 VAL [ad1={2:0}, j=0] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=1] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=2] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=3] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=4] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=5] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=6] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=7] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=8] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=9] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=10] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=11] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=12] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=13] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=14] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=15] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=16] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=17] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=18] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=19] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=20] [L17] COND FALSE !(j<20) VAL [ad1={2:0}, j=20] [L21] i = __VERIFIER_nondet_int() [L22] COND TRUE i >= 0 && i < 10 [L23] ad2 = ad1 [L24] ad1[i].a = i [L25] pa = &ad1[i].a [L26] EXPR ad2[i].a [L26] i = ad2[i].a + 10 [L27] EXPR \read(*pa) VAL [\read(*pa)=7, ad1={2:0}, ad2={2:0}, i=17, j=20, pa={2:56}] [L27] COND FALSE !(i < *pa) [L30] CALL, EXPR check(ad1, i) VAL [\old(b)=17, ad1={2:0}] [L10] EXPR ad1[b].a [L10] return ad1[b].a == b; [L30] RET, EXPR check(ad1, i) VAL [ad1={2:0}, ad2={2:0}, check(ad1, i)=0, i=17, j=20, pa={2:56}] [L30] COND TRUE !check(ad1, i) [L37] __VERIFIER_error() VAL [ad1={2:0}, ad2={2:0}, i=17, j=20, pa={2:56}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 24.4s, OverallIterations: 6, TraceHistogramMax: 20, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 103 SDtfs, 35 SDslu, 153 SDs, 0 SdLazy, 84 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 198 GetRequests, 161 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=5, 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, 5 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 17.8s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 177 NumberOfCodeBlocks, 139 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 195 ConstructedInterpolants, 0 QuantifiedInterpolants, 9525 SizeOfPredicates, 4 NumberOfNonLiveVariables, 411 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 0/234 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...