/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/condaf.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 01:38:10,912 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 01:38:10,915 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 01:38:10,932 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 01:38:10,933 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 01:38:10,934 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 01:38:10,935 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 01:38:10,937 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 01:38:10,939 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 01:38:10,940 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 01:38:10,941 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 01:38:10,942 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 01:38:10,942 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 01:38:10,943 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 01:38:10,944 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 01:38:10,945 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 01:38:10,946 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 01:38:10,947 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 01:38:10,949 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 01:38:10,951 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 01:38:10,953 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 01:38:10,954 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 01:38:10,955 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 01:38:10,956 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 01:38:10,959 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 01:38:10,967 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 01:38:10,968 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 01:38:10,969 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 01:38:10,969 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 01:38:10,984 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 01:38:10,984 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 01:38:10,986 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 01:38:10,986 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 01:38:10,986 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 01:38:10,987 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 01:38:10,987 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 01:38:10,987 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 01:38:10,987 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 01:38:10,987 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 01:38:10,988 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 01:38:10,988 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 01:38:10,988 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 01:38:10,988 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 01:38:10,988 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 01:38:10,989 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 01:38:10,989 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 01:38:10,989 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 01:38:10,989 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 01:38:10,989 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 01:38:10,990 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 01:38:10,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:38:10,990 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 01:38:10,990 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 01:38:10,991 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 01:38:10,991 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 01:38:10,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:38:10,991 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 01:38:10,991 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 01:38:10,991 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 01:38:11,292 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 01:38:11,306 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 01:38:11,309 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 01:38:11,311 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 01:38:11,311 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 01:38:11,312 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/condaf.c [2020-07-21 01:38:11,382 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f260e1b1/4860ec224be64e4a94b400910be65ca9/FLAGb6641f09e [2020-07-21 01:38:11,837 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 01:38:11,837 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/condaf.c [2020-07-21 01:38:11,845 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f260e1b1/4860ec224be64e4a94b400910be65ca9/FLAGb6641f09e [2020-07-21 01:38:12,186 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f260e1b1/4860ec224be64e4a94b400910be65ca9 [2020-07-21 01:38:12,198 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 01:38:12,201 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 01:38:12,203 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 01:38:12,203 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 01:38:12,207 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 01:38:12,209 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:38:12" (1/1) ... [2020-07-21 01:38:12,213 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f443bca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:12, skipping insertion in model container [2020-07-21 01:38:12,213 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:38:12" (1/1) ... [2020-07-21 01:38:12,223 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 01:38:12,243 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 01:38:12,445 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:38:12,456 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 01:38:12,482 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:38:12,501 INFO L208 MainTranslator]: Completed translation [2020-07-21 01:38:12,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:12 WrapperNode [2020-07-21 01:38:12,501 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 01:38:12,502 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 01:38:12,502 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 01:38:12,503 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 01:38:12,609 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:12" (1/1) ... [2020-07-21 01:38:12,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:12" (1/1) ... [2020-07-21 01:38:12,619 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:12" (1/1) ... [2020-07-21 01:38:12,620 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:12" (1/1) ... [2020-07-21 01:38:12,630 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:12" (1/1) ... [2020-07-21 01:38:12,644 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:12" (1/1) ... [2020-07-21 01:38:12,646 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:12" (1/1) ... [2020-07-21 01:38:12,649 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 01:38:12,649 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 01:38:12,650 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 01:38:12,650 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 01:38:12,651 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:12" (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 01:38:12,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 01:38:12,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 01:38:12,729 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 01:38:12,729 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 01:38:12,729 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 01:38:12,729 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 01:38:12,729 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 01:38:12,730 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 01:38:12,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 01:38:12,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 01:38:12,730 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 01:38:12,730 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 01:38:12,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 01:38:12,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 01:38:12,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 01:38:12,731 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 01:38:12,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 01:38:12,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 01:38:12,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 01:38:13,012 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 01:38:13,012 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-21 01:38:13,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:38:13 BoogieIcfgContainer [2020-07-21 01:38:13,017 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 01:38:13,019 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 01:38:13,019 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 01:38:13,022 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 01:38:13,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:38:12" (1/3) ... [2020-07-21 01:38:13,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c4988e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:38:13, skipping insertion in model container [2020-07-21 01:38:13,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:12" (2/3) ... [2020-07-21 01:38:13,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c4988e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:38:13, skipping insertion in model container [2020-07-21 01:38:13,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:38:13" (3/3) ... [2020-07-21 01:38:13,026 INFO L109 eAbstractionObserver]: Analyzing ICFG condaf.c [2020-07-21 01:38:13,037 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 01:38:13,046 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 01:38:13,064 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 01:38:13,102 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 01:38:13,102 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 01:38:13,102 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 01:38:13,103 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 01:38:13,103 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 01:38:13,103 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 01:38:13,103 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 01:38:13,104 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 01:38:13,130 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-07-21 01:38:13,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 01:38:13,139 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:38:13,140 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] [2020-07-21 01:38:13,140 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:38:13,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:38:13,148 INFO L82 PathProgramCache]: Analyzing trace with hash -88121349, now seen corresponding path program 1 times [2020-07-21 01:38:13,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:38:13,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1862055088] [2020-07-21 01:38:13,160 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 01:38:13,315 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 01:38:13,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:38:13,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 01:38:13,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:38:13,351 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 01:38:13,352 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:38:13,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1862055088] [2020-07-21 01:38:13,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:38:13,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 01:38:13,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120519251] [2020-07-21 01:38:13,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 01:38:13,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:38:13,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 01:38:13,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 01:38:13,378 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 2 states. [2020-07-21 01:38:13,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:38:13,408 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2020-07-21 01:38:13,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 01:38:13,410 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 23 [2020-07-21 01:38:13,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:38:13,420 INFO L225 Difference]: With dead ends: 60 [2020-07-21 01:38:13,420 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 01:38:13,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 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 01:38:13,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 01:38:13,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-21 01:38:13,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-21 01:38:13,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-07-21 01:38:13,485 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 23 [2020-07-21 01:38:13,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:38:13,486 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-07-21 01:38:13,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 01:38:13,486 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-07-21 01:38:13,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 01:38:13,489 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:38:13,490 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] [2020-07-21 01:38:13,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:38:13,705 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:38:13,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:38:13,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1099238599, now seen corresponding path program 1 times [2020-07-21 01:38:13,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:38:13,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [111330241] [2020-07-21 01:38:13,708 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 01:38:13,770 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:38:13,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:38:13,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:38:13,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:38:13,822 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 01:38:13,823 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:38:13,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [111330241] [2020-07-21 01:38:13,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:38:13,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 01:38:13,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023970316] [2020-07-21 01:38:13,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 01:38:13,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:38:13,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 01:38:13,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 01:38:13,828 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 4 states. [2020-07-21 01:38:13,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:38:13,933 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2020-07-21 01:38:13,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 01:38:13,933 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-07-21 01:38:13,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:38:13,935 INFO L225 Difference]: With dead ends: 48 [2020-07-21 01:38:13,935 INFO L226 Difference]: Without dead ends: 35 [2020-07-21 01:38:13,937 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 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 01:38:13,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-21 01:38:13,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2020-07-21 01:38:13,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 01:38:13,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-07-21 01:38:13,945 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 23 [2020-07-21 01:38:13,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:38:13,946 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-07-21 01:38:13,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 01:38:13,946 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-07-21 01:38:13,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-21 01:38:13,947 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:38:13,947 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:38:14,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:38:14,162 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:38:14,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:38:14,163 INFO L82 PathProgramCache]: Analyzing trace with hash 188437731, now seen corresponding path program 1 times [2020-07-21 01:38:14,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:38:14,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334129410] [2020-07-21 01:38:14,166 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 01:38:14,220 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:38:14,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:38:14,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 01:38:14,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:38:14,284 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 01:38:14,285 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:38:14,294 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:38:14,295 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 01:38:14,295 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-07-21 01:38:14,330 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 01:38:14,331 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:38:14,333 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:38:14,334 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 01:38:14,334 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-07-21 01:38:14,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 01:38:14,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:38:14,398 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 14 treesize of output 12 [2020-07-21 01:38:14,412 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 22 treesize of output 20 [2020-07-21 01:38:14,413 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 01:38:14,415 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:38:14,415 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 01:38:14,418 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:38:14,418 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 01:38:14,419 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:14, output treesize:7 [2020-07-21 01:38:14,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 01:38:14,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334129410] [2020-07-21 01:38:14,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:38:14,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-21 01:38:14,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952264216] [2020-07-21 01:38:14,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 01:38:14,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:38:14,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 01:38:14,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-07-21 01:38:14,442 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 8 states. [2020-07-21 01:38:14,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:38:14,609 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2020-07-21 01:38:14,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 01:38:14,610 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-07-21 01:38:14,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:38:14,611 INFO L225 Difference]: With dead ends: 48 [2020-07-21 01:38:14,612 INFO L226 Difference]: Without dead ends: 35 [2020-07-21 01:38:14,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-21 01:38:14,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-21 01:38:14,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-07-21 01:38:14,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-21 01:38:14,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-07-21 01:38:14,628 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 30 [2020-07-21 01:38:14,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:38:14,631 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-07-21 01:38:14,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 01:38:14,631 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-07-21 01:38:14,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-21 01:38:14,632 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:38:14,632 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:38:14,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:38:14,833 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:38:14,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:38:14,834 INFO L82 PathProgramCache]: Analyzing trace with hash 446603169, now seen corresponding path program 1 times [2020-07-21 01:38:14,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:38:14,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576622654] [2020-07-21 01:38:14,834 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 01:38:14,903 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:38:14,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 01:38:14,904 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 01:38:14,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 01:38:14,923 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 01:38:14,951 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 01:38:14,952 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 01:38:15,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:38:15,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:38:15 BoogieIcfgContainer [2020-07-21 01:38:15,225 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 01:38:15,227 INFO L168 Benchmark]: Toolchain (without parser) took 3026.98 ms. Allocated memory was 136.8 MB in the beginning and 231.2 MB in the end (delta: 94.4 MB). Free memory was 100.0 MB in the beginning and 176.3 MB in the end (delta: -76.3 MB). Peak memory consumption was 18.1 MB. Max. memory is 7.1 GB. [2020-07-21 01:38:15,228 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 136.8 MB. Free memory is still 118.3 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 01:38:15,229 INFO L168 Benchmark]: CACSL2BoogieTranslator took 299.17 ms. Allocated memory is still 136.8 MB. Free memory was 99.6 MB in the beginning and 88.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-07-21 01:38:15,230 INFO L168 Benchmark]: Boogie Preprocessor took 146.69 ms. Allocated memory was 136.8 MB in the beginning and 201.9 MB in the end (delta: 65.0 MB). Free memory was 88.9 MB in the beginning and 179.3 MB in the end (delta: -90.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-07-21 01:38:15,230 INFO L168 Benchmark]: RCFGBuilder took 367.93 ms. Allocated memory is still 201.9 MB. Free memory was 179.3 MB in the beginning and 161.6 MB in the end (delta: 17.7 MB). Peak memory consumption was 17.7 MB. Max. memory is 7.1 GB. [2020-07-21 01:38:15,231 INFO L168 Benchmark]: TraceAbstraction took 2206.12 ms. Allocated memory was 201.9 MB in the beginning and 231.2 MB in the end (delta: 29.4 MB). Free memory was 160.6 MB in the beginning and 176.3 MB in the end (delta: -15.6 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-07-21 01:38:15,235 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 136.8 MB. Free memory is still 118.3 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 299.17 ms. Allocated memory is still 136.8 MB. Free memory was 99.6 MB in the beginning and 88.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 146.69 ms. Allocated memory was 136.8 MB in the beginning and 201.9 MB in the end (delta: 65.0 MB). Free memory was 88.9 MB in the beginning and 179.3 MB in the end (delta: -90.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 367.93 ms. Allocated memory is still 201.9 MB. Free memory was 179.3 MB in the beginning and 161.6 MB in the end (delta: 17.7 MB). Peak memory consumption was 17.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2206.12 ms. Allocated memory was 201.9 MB in the beginning and 231.2 MB in the end (delta: 29.4 MB). Free memory was 160.6 MB in the beginning and 176.3 MB in the end (delta: -15.6 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; VAL [\old(N)=6, N=0] [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=1] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=1] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=1] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=1] [L25] int i; [L26] int sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] sum[0] = 0 [L30] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=1, sum={2:0}] [L30] COND TRUE i