/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/brs3f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 01:38:03,718 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 01:38:03,722 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 01:38:03,740 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 01:38:03,740 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 01:38:03,742 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 01:38:03,743 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 01:38:03,745 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 01:38:03,747 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 01:38:03,748 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 01:38:03,749 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 01:38:03,750 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 01:38:03,750 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 01:38:03,751 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 01:38:03,752 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 01:38:03,754 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 01:38:03,755 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 01:38:03,756 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 01:38:03,758 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 01:38:03,760 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 01:38:03,762 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 01:38:03,763 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 01:38:03,764 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 01:38:03,765 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 01:38:03,768 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 01:38:03,776 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 01:38:03,777 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 01:38:03,777 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 01:38:03,778 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 01:38:03,794 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 01:38:03,795 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 01:38:03,796 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 01:38:03,796 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 01:38:03,796 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 01:38:03,797 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 01:38:03,797 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 01:38:03,797 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 01:38:03,797 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 01:38:03,797 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 01:38:03,798 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 01:38:03,798 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 01:38:03,798 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 01:38:03,798 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 01:38:03,798 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 01:38:03,799 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 01:38:03,799 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 01:38:03,799 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 01:38:03,799 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 01:38:03,799 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 01:38:03,800 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 01:38:03,800 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:38:03,800 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 01:38:03,800 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 01:38:03,800 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 01:38:03,801 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 01:38:03,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:38:03,801 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 01:38:03,801 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 01:38:03,801 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 01:38:04,096 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 01:38:04,112 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 01:38:04,116 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 01:38:04,118 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 01:38:04,118 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 01:38:04,119 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs3f.c [2020-07-21 01:38:04,187 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eac4b7bff/4c8f21961c1a491b9f3e282e5088efc7/FLAGab408ff0f [2020-07-21 01:38:04,698 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 01:38:04,699 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/brs3f.c [2020-07-21 01:38:04,710 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eac4b7bff/4c8f21961c1a491b9f3e282e5088efc7/FLAGab408ff0f [2020-07-21 01:38:05,024 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eac4b7bff/4c8f21961c1a491b9f3e282e5088efc7 [2020-07-21 01:38:05,035 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 01:38:05,037 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 01:38:05,041 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 01:38:05,041 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 01:38:05,045 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 01:38:05,046 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:38:05" (1/1) ... [2020-07-21 01:38:05,050 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30732442 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:05, skipping insertion in model container [2020-07-21 01:38:05,050 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:38:05" (1/1) ... [2020-07-21 01:38:05,060 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 01:38:05,085 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 01:38:05,330 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:38:05,342 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 01:38:05,366 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:38:05,385 INFO L208 MainTranslator]: Completed translation [2020-07-21 01:38:05,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:05 WrapperNode [2020-07-21 01:38:05,386 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 01:38:05,387 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 01:38:05,387 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 01:38:05,387 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 01:38:05,485 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:05" (1/1) ... [2020-07-21 01:38:05,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:05" (1/1) ... [2020-07-21 01:38:05,495 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:05" (1/1) ... [2020-07-21 01:38:05,496 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:05" (1/1) ... [2020-07-21 01:38:05,505 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:05" (1/1) ... [2020-07-21 01:38:05,511 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:05" (1/1) ... [2020-07-21 01:38:05,512 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:05" (1/1) ... [2020-07-21 01:38:05,515 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 01:38:05,516 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 01:38:05,516 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 01:38:05,516 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 01:38:05,517 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:05" (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 01:38:05,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 01:38:05,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 01:38:05,586 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 01:38:05,586 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 01:38:05,587 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 01:38:05,587 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 01:38:05,587 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 01:38:05,587 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 01:38:05,587 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 01:38:05,587 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 01:38:05,588 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 01:38:05,588 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 01:38:05,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 01:38:05,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 01:38:05,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 01:38:05,588 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 01:38:05,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 01:38:05,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 01:38:05,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 01:38:05,936 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 01:38:05,937 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-21 01:38:05,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:38:05 BoogieIcfgContainer [2020-07-21 01:38:05,941 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 01:38:05,943 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 01:38:05,943 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 01:38:05,950 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 01:38:05,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:38:05" (1/3) ... [2020-07-21 01:38:05,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a00a583 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:38:05, skipping insertion in model container [2020-07-21 01:38:05,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:05" (2/3) ... [2020-07-21 01:38:05,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a00a583 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:38:05, skipping insertion in model container [2020-07-21 01:38:05,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:38:05" (3/3) ... [2020-07-21 01:38:05,959 INFO L109 eAbstractionObserver]: Analyzing ICFG brs3f.c [2020-07-21 01:38:05,969 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 01:38:05,976 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 01:38:05,991 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 01:38:06,015 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 01:38:06,015 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 01:38:06,015 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 01:38:06,016 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 01:38:06,016 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 01:38:06,016 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 01:38:06,016 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 01:38:06,016 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 01:38:06,032 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-21 01:38:06,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 01:38:06,037 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:38:06,037 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 01:38:06,038 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:38:06,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:38:06,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1824292310, now seen corresponding path program 1 times [2020-07-21 01:38:06,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:38:06,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2128840025] [2020-07-21 01:38:06,052 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 01:38:06,149 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 01:38:06,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:38:06,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 01:38:06,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:38:06,180 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 01:38:06,180 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:38:06,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2128840025] [2020-07-21 01:38:06,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:38:06,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 01:38:06,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407601709] [2020-07-21 01:38:06,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 01:38:06,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:38:06,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 01:38:06,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 01:38:06,207 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-07-21 01:38:06,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:38:06,234 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2020-07-21 01:38:06,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 01:38:06,235 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2020-07-21 01:38:06,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:38:06,244 INFO L225 Difference]: With dead ends: 56 [2020-07-21 01:38:06,244 INFO L226 Difference]: Without dead ends: 26 [2020-07-21 01:38:06,248 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 01:38:06,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-21 01:38:06,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-07-21 01:38:06,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 01:38:06,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-07-21 01:38:06,295 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 21 [2020-07-21 01:38:06,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:38:06,296 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-07-21 01:38:06,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 01:38:06,296 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-07-21 01:38:06,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 01:38:06,297 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:38:06,297 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 01:38:06,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:38:06,514 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:38:06,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:38:06,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1767537087, now seen corresponding path program 1 times [2020-07-21 01:38:06,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:38:06,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981161645] [2020-07-21 01:38:06,515 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 01:38:06,634 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:38:06,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:38:06,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:38:06,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:38:06,685 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 01:38:06,685 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:38:06,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981161645] [2020-07-21 01:38:06,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:38:06,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 01:38:06,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282611501] [2020-07-21 01:38:06,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 01:38:06,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:38:06,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 01:38:06,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 01:38:06,690 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 4 states. [2020-07-21 01:38:06,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:38:06,774 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2020-07-21 01:38:06,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 01:38:06,775 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-07-21 01:38:06,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:38:06,776 INFO L225 Difference]: With dead ends: 42 [2020-07-21 01:38:06,776 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 01:38:06,778 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 01:38:06,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 01:38:06,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2020-07-21 01:38:06,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-21 01:38:06,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-07-21 01:38:06,786 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 21 [2020-07-21 01:38:06,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:38:06,787 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-07-21 01:38:06,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 01:38:06,787 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-07-21 01:38:06,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 01:38:06,788 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:38:06,788 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:38:07,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:38:07,003 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:38:07,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:38:07,004 INFO L82 PathProgramCache]: Analyzing trace with hash -395878216, now seen corresponding path program 1 times [2020-07-21 01:38:07,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:38:07,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066955997] [2020-07-21 01:38:07,006 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 01:38:07,070 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:38:07,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:38:07,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 01:38:07,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:38:07,145 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 01:38:07,146 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:38:07,155 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:38:07,155 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 01:38:07,156 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-07-21 01:38:07,182 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2020-07-21 01:38:07,183 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:38:07,189 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:38:07,190 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 01:38:07,190 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:7 [2020-07-21 01:38:07,206 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:38:07,211 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:38:07,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 01:38:07,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:38:07,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066955997] [2020-07-21 01:38:07,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:38:07,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 01:38:07,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754185453] [2020-07-21 01:38:07,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 01:38:07,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:38:07,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 01:38:07,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 01:38:07,246 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 7 states. [2020-07-21 01:38:07,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:38:07,401 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-07-21 01:38:07,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 01:38:07,402 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-07-21 01:38:07,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:38:07,403 INFO L225 Difference]: With dead ends: 37 [2020-07-21 01:38:07,403 INFO L226 Difference]: Without dead ends: 31 [2020-07-21 01:38:07,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-07-21 01:38:07,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-21 01:38:07,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-07-21 01:38:07,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-21 01:38:07,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-07-21 01:38:07,411 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 27 [2020-07-21 01:38:07,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:38:07,411 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-07-21 01:38:07,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 01:38:07,412 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-07-21 01:38:07,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 01:38:07,413 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:38:07,413 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:38:07,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:38:07,628 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:38:07,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:38:07,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1205224842, now seen corresponding path program 1 times [2020-07-21 01:38:07,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:38:07,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1704744808] [2020-07-21 01:38:07,629 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 01:38:07,674 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:38:07,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:38:07,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:38:07,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:38:07,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 01:38:07,692 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:38:07,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1704744808] [2020-07-21 01:38:07,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:38:07,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:38:07,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038418582] [2020-07-21 01:38:07,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:38:07,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:38:07,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:38:07,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:38:07,694 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 3 states. [2020-07-21 01:38:07,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:38:07,731 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-07-21 01:38:07,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:38:07,731 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-07-21 01:38:07,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:38:07,732 INFO L225 Difference]: With dead ends: 48 [2020-07-21 01:38:07,732 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 01:38:07,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:38:07,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 01:38:07,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-07-21 01:38:07,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-21 01:38:07,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-07-21 01:38:07,740 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 27 [2020-07-21 01:38:07,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:38:07,741 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-07-21 01:38:07,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:38:07,741 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-07-21 01:38:07,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-21 01:38:07,742 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:38:07,743 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, 1, 1] [2020-07-21 01:38:07,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:38:07,959 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:38:07,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:38:07,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1239476407, now seen corresponding path program 1 times [2020-07-21 01:38:07,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:38:07,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262629382] [2020-07-21 01:38:07,961 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 01:38:08,006 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:38:08,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:38:08,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 01:38:08,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:38:08,060 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 01:38:08,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:38:08,118 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 01:38:08,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262629382] [2020-07-21 01:38:08,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:38:08,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-21 01:38:08,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444596838] [2020-07-21 01:38:08,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 01:38:08,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:38:08,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 01:38:08,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-21 01:38:08,121 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 9 states. [2020-07-21 01:38:08,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:38:08,267 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-07-21 01:38:08,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 01:38:08,268 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-07-21 01:38:08,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:38:08,269 INFO L225 Difference]: With dead ends: 54 [2020-07-21 01:38:08,269 INFO L226 Difference]: Without dead ends: 38 [2020-07-21 01:38:08,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 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 01:38:08,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-21 01:38:08,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2020-07-21 01:38:08,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 01:38:08,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-07-21 01:38:08,277 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 30 [2020-07-21 01:38:08,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:38:08,278 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-07-21 01:38:08,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 01:38:08,278 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-07-21 01:38:08,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-21 01:38:08,279 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:38:08,280 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:38:08,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:38:08,493 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:38:08,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:38:08,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1492634651, now seen corresponding path program 1 times [2020-07-21 01:38:08,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:38:08,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017747997] [2020-07-21 01:38:08,497 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 01:38:08,553 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:38:08,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 01:38:08,554 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 01:38:08,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 01:38:08,574 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 01:38:08,601 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 01:38:08,601 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 01:38:08,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:38:08,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:38:08 BoogieIcfgContainer [2020-07-21 01:38:08,856 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 01:38:08,859 INFO L168 Benchmark]: Toolchain (without parser) took 3822.03 ms. Allocated memory was 138.4 MB in the beginning and 234.9 MB in the end (delta: 96.5 MB). Free memory was 104.1 MB in the beginning and 124.9 MB in the end (delta: -20.8 MB). Peak memory consumption was 75.6 MB. Max. memory is 7.1 GB. [2020-07-21 01:38:08,860 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 01:38:08,861 INFO L168 Benchmark]: CACSL2BoogieTranslator took 345.85 ms. Allocated memory is still 138.4 MB. Free memory was 103.6 MB in the beginning and 93.0 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-07-21 01:38:08,862 INFO L168 Benchmark]: Boogie Preprocessor took 128.16 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 93.0 MB in the beginning and 179.4 MB in the end (delta: -86.4 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-07-21 01:38:08,863 INFO L168 Benchmark]: RCFGBuilder took 425.81 ms. Allocated memory is still 201.9 MB. Free memory was 179.4 MB in the beginning and 161.8 MB in the end (delta: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 7.1 GB. [2020-07-21 01:38:08,864 INFO L168 Benchmark]: TraceAbstraction took 2913.55 ms. Allocated memory was 201.9 MB in the beginning and 234.9 MB in the end (delta: 33.0 MB). Free memory was 161.8 MB in the beginning and 124.9 MB in the end (delta: 36.9 MB). Peak memory consumption was 70.0 MB. Max. memory is 7.1 GB. [2020-07-21 01:38:08,867 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 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 345.85 ms. Allocated memory is still 138.4 MB. Free memory was 103.6 MB in the beginning and 93.0 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 128.16 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 93.0 MB in the beginning and 179.4 MB in the end (delta: -86.4 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 425.81 ms. Allocated memory is still 201.9 MB. Free memory was 179.4 MB in the beginning and 161.8 MB in the end (delta: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2913.55 ms. Allocated memory was 201.9 MB in the beginning and 234.9 MB in the end (delta: 33.0 MB). Free memory was 161.8 MB in the beginning and 124.9 MB in the end (delta: 36.9 MB). Peak memory consumption was 70.0 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)=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] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=2, sum={2:0}] [L29] COND TRUE i