/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 DAGSIZE --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/s1iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 20:18:53,422 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 20:18:53,424 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 20:18:53,436 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 20:18:53,437 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 20:18:53,438 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 20:18:53,439 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 20:18:53,441 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 20:18:53,443 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 20:18:53,444 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 20:18:53,445 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 20:18:53,446 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 20:18:53,446 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 20:18:53,447 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 20:18:53,448 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 20:18:53,449 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 20:18:53,450 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 20:18:53,453 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 20:18:53,454 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 20:18:53,458 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 20:18:53,462 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 20:18:53,463 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 20:18:53,464 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 20:18:53,467 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 20:18:53,473 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 20:18:53,485 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 20:18:53,486 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 20:18:53,487 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 20:18:53,488 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 20:18:53,511 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 20:18:53,512 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 20:18:53,516 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 20:18:53,517 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 20:18:53,517 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 20:18:53,517 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 20:18:53,518 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 20:18:53,518 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 20:18:53,518 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 20:18:53,518 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 20:18:53,520 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 20:18:53,520 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 20:18:53,520 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 20:18:53,521 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 20:18:53,521 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 20:18:53,521 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 20:18:53,522 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 20:18:53,522 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 20:18:53,522 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 20:18:53,523 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 20:18:53,524 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 20:18:53,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 20:18:53,526 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 20:18:53,527 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 20:18:53,527 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 20:18:53,527 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 20:18:53,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:53,528 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 20:18:53,529 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 20:18:53,529 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 -> DAGSIZE 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 20:18:53,847 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 20:18:53,861 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 20:18:53,866 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 20:18:53,867 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 20:18:53,868 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 20:18:53,869 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s1iff.c [2020-07-21 20:18:53,935 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d59aeed6d/05a40be9b8bc4076bbaaa6fb12795e08/FLAGe3d54f586 [2020-07-21 20:18:54,393 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 20:18:54,394 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s1iff.c [2020-07-21 20:18:54,401 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d59aeed6d/05a40be9b8bc4076bbaaa6fb12795e08/FLAGe3d54f586 [2020-07-21 20:18:54,755 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d59aeed6d/05a40be9b8bc4076bbaaa6fb12795e08 [2020-07-21 20:18:54,765 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 20:18:54,768 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 20:18:54,769 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 20:18:54,770 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 20:18:54,773 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 20:18:54,774 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:18:54" (1/1) ... [2020-07-21 20:18:54,777 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@476603ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:54, skipping insertion in model container [2020-07-21 20:18:54,777 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:18:54" (1/1) ... [2020-07-21 20:18:54,784 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 20:18:54,801 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 20:18:55,018 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:18:55,028 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 20:18:55,056 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:18:55,077 INFO L208 MainTranslator]: Completed translation [2020-07-21 20:18:55,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:55 WrapperNode [2020-07-21 20:18:55,078 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 20:18:55,079 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 20:18:55,079 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 20:18:55,080 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 20:18:55,186 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:55" (1/1) ... [2020-07-21 20:18:55,188 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:55" (1/1) ... [2020-07-21 20:18:55,200 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:55" (1/1) ... [2020-07-21 20:18:55,200 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:55" (1/1) ... [2020-07-21 20:18:55,222 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:55" (1/1) ... [2020-07-21 20:18:55,230 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:55" (1/1) ... [2020-07-21 20:18:55,237 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:55" (1/1) ... [2020-07-21 20:18:55,241 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 20:18:55,243 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 20:18:55,243 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 20:18:55,243 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 20:18:55,244 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:55" (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 20:18:55,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 20:18:55,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 20:18:55,335 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 20:18:55,335 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 20:18:55,335 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 20:18:55,336 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 20:18:55,336 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 20:18:55,336 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 20:18:55,336 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 20:18:55,336 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 20:18:55,337 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 20:18:55,337 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 20:18:55,338 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 20:18:55,338 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 20:18:55,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 20:18:55,339 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 20:18:55,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 20:18:55,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 20:18:55,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 20:18:55,654 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 20:18:55,654 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-21 20:18:55,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:18:55 BoogieIcfgContainer [2020-07-21 20:18:55,659 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 20:18:55,663 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 20:18:55,664 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 20:18:55,669 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 20:18:55,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:18:54" (1/3) ... [2020-07-21 20:18:55,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d70330 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:18:55, skipping insertion in model container [2020-07-21 20:18:55,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:55" (2/3) ... [2020-07-21 20:18:55,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d70330 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:18:55, skipping insertion in model container [2020-07-21 20:18:55,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:18:55" (3/3) ... [2020-07-21 20:18:55,684 INFO L109 eAbstractionObserver]: Analyzing ICFG s1iff.c [2020-07-21 20:18:55,694 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 20:18:55,701 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 20:18:55,715 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 20:18:55,739 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 20:18:55,740 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 20:18:55,740 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 20:18:55,740 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 20:18:55,740 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 20:18:55,740 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 20:18:55,740 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 20:18:55,740 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 20:18:55,759 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-07-21 20:18:55,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 20:18:55,765 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:18:55,766 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] [2020-07-21 20:18:55,767 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:18:55,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:18:55,772 INFO L82 PathProgramCache]: Analyzing trace with hash -432131487, now seen corresponding path program 1 times [2020-07-21 20:18:55,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:18:55,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1620388431] [2020-07-21 20:18:55,781 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 20:18:55,936 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:18:55,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:18:55,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 20:18:55,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:18:56,014 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 20:18:56,015 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:18:56,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1620388431] [2020-07-21 20:18:56,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:18:56,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 20:18:56,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600862682] [2020-07-21 20:18:56,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 20:18:56,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:18:56,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 20:18:56,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 20:18:56,039 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 4 states. [2020-07-21 20:18:56,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:18:56,156 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2020-07-21 20:18:56,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 20:18:56,158 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-07-21 20:18:56,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:18:56,166 INFO L225 Difference]: With dead ends: 63 [2020-07-21 20:18:56,167 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 20:18:56,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 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 20:18:56,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 20:18:56,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-07-21 20:18:56,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 20:18:56,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-07-21 20:18:56,208 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2020-07-21 20:18:56,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:18:56,209 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-07-21 20:18:56,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 20:18:56,209 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-07-21 20:18:56,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 20:18:56,211 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:18:56,211 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] [2020-07-21 20:18:56,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:56,428 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:18:56,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:18:56,429 INFO L82 PathProgramCache]: Analyzing trace with hash -445719797, now seen corresponding path program 1 times [2020-07-21 20:18:56,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:18:56,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1989639705] [2020-07-21 20:18:56,431 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 20:18:56,536 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:18:56,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:18:56,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 20:18:56,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:18:56,636 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 20:18:56,636 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:18:56,648 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:18:56,649 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:18:56,649 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2020-07-21 20:18:56,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:18:56,678 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-07-21 20:18:56,680 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:18:56,692 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:18:56,693 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:18:56,693 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:27 [2020-07-21 20:18:56,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:18:56,905 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:18:56,906 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 57 [2020-07-21 20:18:56,908 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:18:56,988 INFO L624 ElimStorePlain]: treesize reduction 35, result has 52.1 percent of original size [2020-07-21 20:18:56,992 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-07-21 20:18:56,993 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:74, output treesize:35 [2020-07-21 20:18:57,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:18:57,069 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2020-07-21 20:18:57,070 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:18:57,083 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:18:57,084 INFO L544 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:18:57,085 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:42, output treesize:10 [2020-07-21 20:18:57,110 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 20:18:57,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:18:57,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:18:57,208 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:18:57,459 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:19:10,715 WARN L193 SmtUtils]: Spent 5.83 s on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 20:19:10,736 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:19:10,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:19:10,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1989639705] [2020-07-21 20:19:10,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:19:10,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-07-21 20:19:10,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945897865] [2020-07-21 20:19:10,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 20:19:10,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:19:10,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 20:19:10,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=313, Unknown=3, NotChecked=0, Total=380 [2020-07-21 20:19:10,801 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 20 states. [2020-07-21 20:19:13,348 WARN L193 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 95 DAG size of output: 52 [2020-07-21 20:19:18,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:19:18,164 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-07-21 20:19:18,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 20:19:18,166 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 26 [2020-07-21 20:19:18,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:19:18,169 INFO L225 Difference]: With dead ends: 50 [2020-07-21 20:19:18,170 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 20:19:18,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=117, Invalid=582, Unknown=3, NotChecked=0, Total=702 [2020-07-21 20:19:18,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 20:19:18,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2020-07-21 20:19:18,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 20:19:18,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-07-21 20:19:18,179 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 26 [2020-07-21 20:19:18,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:19:18,180 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-07-21 20:19:18,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 20:19:18,180 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-07-21 20:19:18,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 20:19:18,181 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:19:18,181 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-07-21 20:19:18,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:19:18,396 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:19:18,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:19:18,398 INFO L82 PathProgramCache]: Analyzing trace with hash 531279049, now seen corresponding path program 2 times [2020-07-21 20:19:18,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:19:18,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1733533332] [2020-07-21 20:19:18,399 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 20:19:18,445 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:19:18,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:19:18,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 20:19:18,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:19:18,488 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:19:18,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:19:18,524 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:19:18,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1733533332] [2020-07-21 20:19:18,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:19:18,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-21 20:19:18,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138701013] [2020-07-21 20:19:18,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 20:19:18,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:19:18,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 20:19:18,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-21 20:19:18,527 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 9 states. [2020-07-21 20:19:18,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:19:18,719 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-07-21 20:19:18,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 20:19:18,720 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-07-21 20:19:18,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:19:18,721 INFO L225 Difference]: With dead ends: 45 [2020-07-21 20:19:18,721 INFO L226 Difference]: Without dead ends: 39 [2020-07-21 20:19:18,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-21 20:19:18,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-21 20:19:18,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2020-07-21 20:19:18,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 20:19:18,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-07-21 20:19:18,730 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 28 [2020-07-21 20:19:18,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:19:18,731 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-07-21 20:19:18,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 20:19:18,731 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-07-21 20:19:18,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-21 20:19:18,732 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:19:18,733 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] [2020-07-21 20:19:18,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:19:18,934 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:19:18,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:19:18,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1018004383, now seen corresponding path program 3 times [2020-07-21 20:19:18,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:19:18,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12834697] [2020-07-21 20:19:18,936 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 20:19:18,981 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:19:18,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:19:18,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 20:19:18,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:19:19,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:19:19,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:19:19,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:19:19,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12834697] [2020-07-21 20:19:19,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:19:19,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-21 20:19:19,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248947287] [2020-07-21 20:19:19,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 20:19:19,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:19:19,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 20:19:19,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-21 20:19:19,074 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 9 states. [2020-07-21 20:19:19,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:19:19,240 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2020-07-21 20:19:19,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 20:19:19,240 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-07-21 20:19:19,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:19:19,242 INFO L225 Difference]: With dead ends: 49 [2020-07-21 20:19:19,242 INFO L226 Difference]: Without dead ends: 35 [2020-07-21 20:19:19,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-07-21 20:19:19,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-21 20:19:19,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-07-21 20:19:19,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-21 20:19:19,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-07-21 20:19:19,256 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 29 [2020-07-21 20:19:19,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:19:19,256 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-07-21 20:19:19,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 20:19:19,256 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-07-21 20:19:19,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 20:19:19,259 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:19:19,259 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-07-21 20:19:19,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:19:19,463 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:19:19,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:19:19,464 INFO L82 PathProgramCache]: Analyzing trace with hash 2056219107, now seen corresponding path program 4 times [2020-07-21 20:19:19,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:19:19,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1721042359] [2020-07-21 20:19:19,466 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 20:19:19,521 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:19:19,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 20:19:19,522 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 20:19:19,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 20:19:19,542 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 20:19:19,568 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 20:19:19,568 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 20:19:19,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:19:19,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 08:19:19 BoogieIcfgContainer [2020-07-21 20:19:19,815 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 20:19:19,817 INFO L168 Benchmark]: Toolchain (without parser) took 25050.25 ms. Allocated memory was 138.9 MB in the beginning and 245.9 MB in the end (delta: 107.0 MB). Free memory was 103.2 MB in the beginning and 208.5 MB in the end (delta: -105.3 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. [2020-07-21 20:19:19,818 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 20:19:19,819 INFO L168 Benchmark]: CACSL2BoogieTranslator took 309.44 ms. Allocated memory is still 138.9 MB. Free memory was 102.7 MB in the beginning and 92.3 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-21 20:19:19,820 INFO L168 Benchmark]: Boogie Preprocessor took 162.09 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 92.3 MB in the beginning and 180.5 MB in the end (delta: -88.2 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-07-21 20:19:19,820 INFO L168 Benchmark]: RCFGBuilder took 416.90 ms. Allocated memory is still 203.4 MB. Free memory was 180.5 MB in the beginning and 164.1 MB in the end (delta: 16.4 MB). Peak memory consumption was 16.4 MB. Max. memory is 7.1 GB. [2020-07-21 20:19:19,821 INFO L168 Benchmark]: TraceAbstraction took 24151.76 ms. Allocated memory was 203.4 MB in the beginning and 245.9 MB in the end (delta: 42.5 MB). Free memory was 163.4 MB in the beginning and 208.5 MB in the end (delta: -45.0 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 20:19:19,825 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 309.44 ms. Allocated memory is still 138.9 MB. Free memory was 102.7 MB in the beginning and 92.3 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 162.09 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 92.3 MB in the beginning and 180.5 MB in the end (delta: -88.2 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 416.90 ms. Allocated memory is still 203.4 MB. Free memory was 180.5 MB in the beginning and 164.1 MB in the end (delta: 16.4 MB). Peak memory consumption was 16.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 24151.76 ms. Allocated memory was 203.4 MB in the beginning and 245.9 MB in the end (delta: 42.5 MB). Free memory was 163.4 MB in the beginning and 208.5 MB in the end (delta: -45.0 MB). There was no memory consumed. 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)=7, 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 sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] sum[0] = 1 [L30] i=0 VAL [\old(N)=0, a={5854:0}, i=0, malloc(sizeof(int)*N)={5854:0}, N=2, sum={5856:0}] [L30] COND TRUE i