/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/array-fpi/s4iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 01:41:02,601 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 01:41:02,604 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 01:41:02,624 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 01:41:02,625 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 01:41:02,627 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 01:41:02,630 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 01:41:02,640 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 01:41:02,645 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 01:41:02,649 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 01:41:02,651 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 01:41:02,652 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 01:41:02,652 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 01:41:02,654 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 01:41:02,657 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 01:41:02,658 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 01:41:02,659 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 01:41:02,660 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 01:41:02,661 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 01:41:02,667 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 01:41:02,673 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 01:41:02,677 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 01:41:02,679 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 01:41:02,680 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 01:41:02,683 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 01:41:02,694 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 01:41:02,695 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 01:41:02,696 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 01:41:02,698 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 01:41:02,740 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 01:41:02,740 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 01:41:02,744 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 01:41:02,745 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 01:41:02,745 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 01:41:02,745 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 01:41:02,745 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 01:41:02,745 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 01:41:02,746 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 01:41:02,746 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 01:41:02,746 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 01:41:02,749 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 01:41:02,749 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 01:41:02,749 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 01:41:02,749 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 01:41:02,750 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 01:41:02,750 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 01:41:02,750 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 01:41:02,750 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 01:41:02,751 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 01:41:02,751 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 01:41:02,751 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:41:02,754 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 01:41:02,754 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 01:41:02,755 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 01:41:02,755 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 01:41:02,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:41:02,757 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 01:41:02,758 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 01:41:02,758 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 01:41:03,116 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 01:41:03,132 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 01:41:03,137 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 01:41:03,139 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 01:41:03,140 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 01:41:03,142 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s4iff.c [2020-07-21 01:41:03,214 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6fda05da/c9980d7b77234d7d8e5a0f61cd517079/FLAG312e4f88e [2020-07-21 01:41:03,760 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 01:41:03,761 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s4iff.c [2020-07-21 01:41:03,771 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6fda05da/c9980d7b77234d7d8e5a0f61cd517079/FLAG312e4f88e [2020-07-21 01:41:04,070 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6fda05da/c9980d7b77234d7d8e5a0f61cd517079 [2020-07-21 01:41:04,081 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 01:41:04,086 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 01:41:04,087 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 01:41:04,087 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 01:41:04,092 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 01:41:04,093 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:41:04" (1/1) ... [2020-07-21 01:41:04,097 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52af3c1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:41:04, skipping insertion in model container [2020-07-21 01:41:04,097 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:41:04" (1/1) ... [2020-07-21 01:41:04,106 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 01:41:04,133 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 01:41:04,323 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:41:04,333 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 01:41:04,353 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:41:04,370 INFO L208 MainTranslator]: Completed translation [2020-07-21 01:41:04,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:41:04 WrapperNode [2020-07-21 01:41:04,370 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 01:41:04,371 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 01:41:04,371 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 01:41:04,371 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 01:41:04,474 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:41:04" (1/1) ... [2020-07-21 01:41:04,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:41:04" (1/1) ... [2020-07-21 01:41:04,485 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:41:04" (1/1) ... [2020-07-21 01:41:04,485 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:41:04" (1/1) ... [2020-07-21 01:41:04,492 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:41:04" (1/1) ... [2020-07-21 01:41:04,498 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:41:04" (1/1) ... [2020-07-21 01:41:04,500 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:41:04" (1/1) ... [2020-07-21 01:41:04,502 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 01:41:04,503 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 01:41:04,503 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 01:41:04,503 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 01:41:04,504 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:41:04" (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 01:41:04,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 01:41:04,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 01:41:04,578 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 01:41:04,578 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 01:41:04,578 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 01:41:04,578 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 01:41:04,578 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 01:41:04,578 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 01:41:04,579 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 01:41:04,579 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 01:41:04,579 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 01:41:04,579 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 01:41:04,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 01:41:04,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 01:41:04,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 01:41:04,580 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 01:41:04,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 01:41:04,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 01:41:04,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 01:41:04,919 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 01:41:04,919 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-21 01:41:04,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:41:04 BoogieIcfgContainer [2020-07-21 01:41:04,924 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 01:41:04,926 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 01:41:04,926 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 01:41:04,930 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 01:41:04,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:41:04" (1/3) ... [2020-07-21 01:41:04,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e076571 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:41:04, skipping insertion in model container [2020-07-21 01:41:04,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:41:04" (2/3) ... [2020-07-21 01:41:04,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e076571 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:41:04, skipping insertion in model container [2020-07-21 01:41:04,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:41:04" (3/3) ... [2020-07-21 01:41:04,935 INFO L109 eAbstractionObserver]: Analyzing ICFG s4iff.c [2020-07-21 01:41:04,948 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 01:41:04,955 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 01:41:04,969 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 01:41:04,993 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 01:41:04,994 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 01:41:04,994 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 01:41:04,994 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 01:41:04,994 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 01:41:04,995 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 01:41:04,995 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 01:41:04,995 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 01:41:05,020 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-07-21 01:41:05,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 01:41:05,027 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:41:05,028 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 01:41:05,029 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:41:05,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:41:05,036 INFO L82 PathProgramCache]: Analyzing trace with hash -432131487, now seen corresponding path program 1 times [2020-07-21 01:41:05,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:41:05,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1457734158] [2020-07-21 01:41:05,047 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 01:41:05,150 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 01:41:05,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:41:05,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 01:41:05,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:41:05,187 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 01:41:05,188 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:41:05,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1457734158] [2020-07-21 01:41:05,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:41:05,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 01:41:05,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780911465] [2020-07-21 01:41:05,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 01:41:05,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:41:05,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 01:41:05,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 01:41:05,217 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-07-21 01:41:05,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:41:05,241 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2020-07-21 01:41:05,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 01:41:05,242 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2020-07-21 01:41:05,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:41:05,252 INFO L225 Difference]: With dead ends: 54 [2020-07-21 01:41:05,252 INFO L226 Difference]: Without dead ends: 25 [2020-07-21 01:41:05,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 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 01:41:05,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-21 01:41:05,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-21 01:41:05,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-21 01:41:05,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-07-21 01:41:05,298 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2020-07-21 01:41:05,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:41:05,299 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-07-21 01:41:05,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 01:41:05,299 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-07-21 01:41:05,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 01:41:05,301 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:41:05,301 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 01:41:05,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:41:05,516 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:41:05,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:41:05,517 INFO L82 PathProgramCache]: Analyzing trace with hash -173966049, now seen corresponding path program 1 times [2020-07-21 01:41:05,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:41:05,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1887300990] [2020-07-21 01:41:05,519 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 01:41:05,590 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:41:05,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:41:05,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:41:05,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:41:05,652 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 01:41:05,652 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:41:05,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1887300990] [2020-07-21 01:41:05,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:41:05,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 01:41:05,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522891334] [2020-07-21 01:41:05,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 01:41:05,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:41:05,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 01:41:05,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 01:41:05,657 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 4 states. [2020-07-21 01:41:05,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:41:05,737 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-07-21 01:41:05,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 01:41:05,738 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-07-21 01:41:05,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:41:05,740 INFO L225 Difference]: With dead ends: 40 [2020-07-21 01:41:05,740 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 01:41:05,741 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 01:41:05,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 01:41:05,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-07-21 01:41:05,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 01:41:05,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-07-21 01:41:05,749 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2020-07-21 01:41:05,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:41:05,750 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-07-21 01:41:05,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 01:41:05,750 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-07-21 01:41:05,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 01:41:05,751 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:41:05,752 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 01:41:05,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:41:05,963 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:41:05,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:41:05,964 INFO L82 PathProgramCache]: Analyzing trace with hash -445719797, now seen corresponding path program 1 times [2020-07-21 01:41:05,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:41:05,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171331133] [2020-07-21 01:41:05,965 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 01:41:06,027 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:41:06,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:41:06,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 01:41:06,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:41:06,103 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 01:41:06,104 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:41:06,128 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:41:06,129 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 01:41:06,130 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-07-21 01:41:06,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 01:41:06,197 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 01:41:06,200 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:41:06,219 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:41:06,220 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 01:41:06,220 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2020-07-21 01:41:06,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 01:41:06,482 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:41:06,483 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 01:41:06,485 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:41:06,527 INFO L624 ElimStorePlain]: treesize reduction 24, result has 65.7 percent of original size [2020-07-21 01:41:06,533 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-07-21 01:41:06,534 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:71, output treesize:46 [2020-07-21 01:41:06,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 01:41:06,618 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:41:06,619 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 37 treesize of output 29 [2020-07-21 01:41:06,621 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:41:06,634 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:41:06,635 INFO L544 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 01:41:06,636 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:53, output treesize:10 [2020-07-21 01:41:06,661 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 01:41:06,696 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 01:41:06,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:41:06,728 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:41:08,846 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-21 01:41:08,854 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:41:08,854 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 50 [2020-07-21 01:41:08,861 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-21 01:41:08,865 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-21 01:41:08,866 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 50 treesize of output 44 [2020-07-21 01:41:08,870 INFO L440 ElimStorePlain]: Different costs {0=[v_arrayElimCell_9], 1=[v_arrayElimCell_8]} [2020-07-21 01:41:08,876 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2020-07-21 01:41:08,877 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-21 01:41:08,884 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:41:08,891 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 67 [2020-07-21 01:41:08,892 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:41:08,893 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:41:08,894 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-21 01:41:08,915 INFO L624 ElimStorePlain]: treesize reduction 43, result has 10.4 percent of original size [2020-07-21 01:41:08,916 INFO L544 ElimStorePlain]: Start of recursive call 3: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 01:41:08,918 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:41:08,918 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 01:41:08,930 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:41:08,932 INFO L544 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 01:41:08,932 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:104, output treesize:9 [2020-07-21 01:41:08,949 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 01:41:08,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171331133] [2020-07-21 01:41:08,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:41:08,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2020-07-21 01:41:08,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97870135] [2020-07-21 01:41:08,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 01:41:08,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:41:08,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 01:41:08,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=274, Unknown=2, NotChecked=0, Total=342 [2020-07-21 01:41:08,954 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 19 states. [2020-07-21 01:41:09,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:41:09,707 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-07-21 01:41:09,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 01:41:09,707 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 26 [2020-07-21 01:41:09,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:41:09,709 INFO L225 Difference]: With dead ends: 50 [2020-07-21 01:41:09,709 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 01:41:09,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=139, Invalid=561, Unknown=2, NotChecked=0, Total=702 [2020-07-21 01:41:09,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 01:41:09,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2020-07-21 01:41:09,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 01:41:09,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-07-21 01:41:09,719 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 26 [2020-07-21 01:41:09,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:41:09,720 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-07-21 01:41:09,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 01:41:09,720 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-07-21 01:41:09,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 01:41:09,721 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:41:09,722 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 01:41:09,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:41:09,938 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:41:09,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:41:09,939 INFO L82 PathProgramCache]: Analyzing trace with hash 531279049, now seen corresponding path program 2 times [2020-07-21 01:41:09,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:41:09,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973060823] [2020-07-21 01:41:09,940 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 01:41:09,995 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:41:09,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:41:09,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 01:41:10,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:41:10,052 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 01:41:10,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:41:10,097 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 01:41:10,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973060823] [2020-07-21 01:41:10,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:41:10,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-21 01:41:10,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358223835] [2020-07-21 01:41:10,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 01:41:10,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:41:10,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 01:41:10,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-21 01:41:10,100 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 9 states. [2020-07-21 01:41:10,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:41:10,302 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-07-21 01:41:10,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 01:41:10,305 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-07-21 01:41:10,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:41:10,306 INFO L225 Difference]: With dead ends: 45 [2020-07-21 01:41:10,307 INFO L226 Difference]: Without dead ends: 39 [2020-07-21 01:41:10,308 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 01:41:10,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-21 01:41:10,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2020-07-21 01:41:10,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 01:41:10,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-07-21 01:41:10,326 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 28 [2020-07-21 01:41:10,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:41:10,327 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-07-21 01:41:10,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 01:41:10,327 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-07-21 01:41:10,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-21 01:41:10,329 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:41:10,329 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 01:41:10,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:41:10,542 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:41:10,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:41:10,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1018004383, now seen corresponding path program 3 times [2020-07-21 01:41:10,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:41:10,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2130702469] [2020-07-21 01:41:10,545 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 01:41:10,591 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:41:10,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:41:10,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 01:41:10,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:41:10,645 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 01:41:10,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:41:10,689 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 01:41:10,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2130702469] [2020-07-21 01:41:10,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:41:10,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-21 01:41:10,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784070795] [2020-07-21 01:41:10,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 01:41:10,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:41:10,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 01:41:10,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-21 01:41:10,692 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 9 states. [2020-07-21 01:41:10,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:41:10,834 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2020-07-21 01:41:10,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 01:41:10,835 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-07-21 01:41:10,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:41:10,836 INFO L225 Difference]: With dead ends: 49 [2020-07-21 01:41:10,836 INFO L226 Difference]: Without dead ends: 35 [2020-07-21 01:41:10,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-07-21 01:41:10,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-21 01:41:10,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-07-21 01:41:10,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-21 01:41:10,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-07-21 01:41:10,845 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 29 [2020-07-21 01:41:10,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:41:10,846 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-07-21 01:41:10,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 01:41:10,846 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-07-21 01:41:10,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 01:41:10,847 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:41:10,847 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 01:41:11,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:41:11,049 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:41:11,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:41:11,050 INFO L82 PathProgramCache]: Analyzing trace with hash 2056219107, now seen corresponding path program 4 times [2020-07-21 01:41:11,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:41:11,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067429135] [2020-07-21 01:41:11,054 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 01:41:11,104 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:41:11,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 01:41:11,105 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 01:41:11,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 01:41:11,122 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 01:41:11,147 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 01:41:11,147 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 01:41:11,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:41:11,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:41:11 BoogieIcfgContainer [2020-07-21 01:41:11,407 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 01:41:11,408 INFO L168 Benchmark]: Toolchain (without parser) took 7325.45 ms. Allocated memory was 138.4 MB in the beginning and 245.9 MB in the end (delta: 107.5 MB). Free memory was 102.8 MB in the beginning and 106.0 MB in the end (delta: -3.2 MB). Peak memory consumption was 104.2 MB. Max. memory is 7.1 GB. [2020-07-21 01:41:11,409 INFO L168 Benchmark]: CDTParser took 0.48 ms. Allocated memory is still 138.4 MB. Free memory is still 121.1 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 01:41:11,410 INFO L168 Benchmark]: CACSL2BoogieTranslator took 283.66 ms. Allocated memory is still 138.4 MB. Free memory was 102.8 MB in the beginning and 92.3 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-07-21 01:41:11,411 INFO L168 Benchmark]: Boogie Preprocessor took 131.47 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 92.3 MB in the beginning and 179.9 MB in the end (delta: -87.6 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-07-21 01:41:11,412 INFO L168 Benchmark]: RCFGBuilder took 421.27 ms. Allocated memory is still 202.4 MB. Free memory was 179.9 MB in the beginning and 162.4 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 7.1 GB. [2020-07-21 01:41:11,413 INFO L168 Benchmark]: TraceAbstraction took 6480.79 ms. Allocated memory was 202.4 MB in the beginning and 245.9 MB in the end (delta: 43.5 MB). Free memory was 162.4 MB in the beginning and 106.0 MB in the end (delta: 56.4 MB). Peak memory consumption was 99.9 MB. Max. memory is 7.1 GB. [2020-07-21 01:41:11,416 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.48 ms. Allocated memory is still 138.4 MB. Free memory is still 121.1 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 283.66 ms. Allocated memory is still 138.4 MB. Free memory was 102.8 MB in the beginning and 92.3 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 131.47 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 92.3 MB in the beginning and 179.9 MB in the end (delta: -87.6 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 421.27 ms. Allocated memory is still 202.4 MB. Free memory was 179.9 MB in the beginning and 162.4 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6480.79 ms. Allocated memory was 202.4 MB in the beginning and 245.9 MB in the end (delta: 43.5 MB). Free memory was 162.4 MB in the beginning and 106.0 MB in the end (delta: 56.4 MB). Peak memory consumption was 99.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; VAL [\old(N)=10, 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={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=2, sum={2:0}] [L30] COND TRUE i