/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 NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/brs1f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 16:40:54,696 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 16:40:54,698 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 16:40:54,715 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 16:40:54,715 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 16:40:54,717 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 16:40:54,718 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 16:40:54,720 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 16:40:54,723 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 16:40:54,724 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 16:40:54,725 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 16:40:54,726 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 16:40:54,727 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 16:40:54,728 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 16:40:54,729 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 16:40:54,730 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 16:40:54,731 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 16:40:54,732 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 16:40:54,734 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 16:40:54,736 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 16:40:54,737 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 16:40:54,738 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 16:40:54,740 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 16:40:54,741 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 16:40:54,743 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 16:40:54,752 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 16:40:54,753 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 16:40:54,754 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 16:40:54,755 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 16:40:54,771 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 16:40:54,771 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 16:40:54,773 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 16:40:54,773 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 16:40:54,773 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 16:40:54,773 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 16:40:54,774 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 16:40:54,774 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 16:40:54,774 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 16:40:54,774 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 16:40:54,774 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 16:40:54,775 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 16:40:54,775 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 16:40:54,775 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 16:40:54,779 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 16:40:54,779 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 16:40:54,779 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 16:40:54,779 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 16:40:54,779 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 16:40:54,779 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 16:40:54,779 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 16:40:54,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:40:54,780 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 16:40:54,780 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 16:40:54,782 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 16:40:54,782 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 16:40:54,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:40:54,782 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 16:40:54,782 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 16:40:54,783 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 -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 16:40:55,135 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 16:40:55,151 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 16:40:55,157 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 16:40:55,159 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 16:40:55,159 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 16:40:55,160 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs1f.c [2020-07-21 16:40:55,244 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f23256c13/d934a2b02241494aa7b0ac2097d8fbf2/FLAG7c6e15fe5 [2020-07-21 16:40:55,776 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 16:40:55,777 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/brs1f.c [2020-07-21 16:40:55,788 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f23256c13/d934a2b02241494aa7b0ac2097d8fbf2/FLAG7c6e15fe5 [2020-07-21 16:40:56,114 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f23256c13/d934a2b02241494aa7b0ac2097d8fbf2 [2020-07-21 16:40:56,129 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 16:40:56,133 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 16:40:56,135 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 16:40:56,135 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 16:40:56,139 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 16:40:56,140 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:40:56" (1/1) ... [2020-07-21 16:40:56,143 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67f0c23b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:40:56, skipping insertion in model container [2020-07-21 16:40:56,144 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:40:56" (1/1) ... [2020-07-21 16:40:56,153 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 16:40:56,173 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 16:40:56,378 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:40:56,387 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 16:40:56,407 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:40:56,424 INFO L208 MainTranslator]: Completed translation [2020-07-21 16:40:56,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:40:56 WrapperNode [2020-07-21 16:40:56,425 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 16:40:56,425 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 16:40:56,425 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 16:40:56,426 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 16:40:56,532 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:40:56" (1/1) ... [2020-07-21 16:40:56,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:40:56" (1/1) ... [2020-07-21 16:40:56,541 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:40:56" (1/1) ... [2020-07-21 16:40:56,542 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:40:56" (1/1) ... [2020-07-21 16:40:56,550 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:40:56" (1/1) ... [2020-07-21 16:40:56,555 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:40:56" (1/1) ... [2020-07-21 16:40:56,557 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:40:56" (1/1) ... [2020-07-21 16:40:56,561 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 16:40:56,562 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 16:40:56,562 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 16:40:56,562 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 16:40:56,563 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:40:56" (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 16:40:56,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 16:40:56,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 16:40:56,645 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 16:40:56,645 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 16:40:56,645 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 16:40:56,646 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 16:40:56,646 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 16:40:56,646 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 16:40:56,646 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 16:40:56,646 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 16:40:56,646 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 16:40:56,646 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 16:40:56,647 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 16:40:56,647 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 16:40:56,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 16:40:56,647 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 16:40:56,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 16:40:56,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 16:40:56,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 16:40:57,002 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 16:40:57,003 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-21 16:40:57,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:40:57 BoogieIcfgContainer [2020-07-21 16:40:57,007 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 16:40:57,009 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 16:40:57,009 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 16:40:57,011 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 16:40:57,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:40:56" (1/3) ... [2020-07-21 16:40:57,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a9d8569 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:40:57, skipping insertion in model container [2020-07-21 16:40:57,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:40:56" (2/3) ... [2020-07-21 16:40:57,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a9d8569 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:40:57, skipping insertion in model container [2020-07-21 16:40:57,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:40:57" (3/3) ... [2020-07-21 16:40:57,018 INFO L109 eAbstractionObserver]: Analyzing ICFG brs1f.c [2020-07-21 16:40:57,029 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 16:40:57,037 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 16:40:57,053 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 16:40:57,076 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 16:40:57,077 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 16:40:57,077 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 16:40:57,077 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 16:40:57,077 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 16:40:57,077 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 16:40:57,078 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 16:40:57,078 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 16:40:57,099 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-21 16:40:57,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 16:40:57,107 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:40:57,108 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 16:40:57,109 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:40:57,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:40:57,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1824292310, now seen corresponding path program 1 times [2020-07-21 16:40:57,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:40:57,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1157521776] [2020-07-21 16:40:57,128 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:40:57,234 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:40:57,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:40:57,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 16:40:57,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:40:57,268 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 16:40:57,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:40:57,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1157521776] [2020-07-21 16:40:57,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:40:57,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 16:40:57,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351274642] [2020-07-21 16:40:57,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 16:40:57,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:40:57,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 16:40:57,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 16:40:57,294 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-07-21 16:40:57,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:40:57,319 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2020-07-21 16:40:57,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 16:40:57,321 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2020-07-21 16:40:57,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:40:57,331 INFO L225 Difference]: With dead ends: 56 [2020-07-21 16:40:57,332 INFO L226 Difference]: Without dead ends: 26 [2020-07-21 16:40:57,336 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 16:40:57,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-21 16:40:57,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-07-21 16:40:57,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 16:40:57,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-07-21 16:40:57,388 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 21 [2020-07-21 16:40:57,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:40:57,389 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-07-21 16:40:57,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 16:40:57,389 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-07-21 16:40:57,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 16:40:57,390 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:40:57,391 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 16:40:57,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:40:57,607 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:40:57,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:40:57,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1767537087, now seen corresponding path program 1 times [2020-07-21 16:40:57,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:40:57,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2032297721] [2020-07-21 16:40:57,611 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:40:57,745 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:40:57,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:40:57,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 16:40:57,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:40:57,804 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 16:40:57,805 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:40:57,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2032297721] [2020-07-21 16:40:57,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:40:57,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 16:40:57,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845548500] [2020-07-21 16:40:57,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 16:40:57,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:40:57,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 16:40:57,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 16:40:57,810 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 4 states. [2020-07-21 16:40:57,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:40:57,896 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2020-07-21 16:40:57,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 16:40:57,897 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-07-21 16:40:57,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:40:57,899 INFO L225 Difference]: With dead ends: 42 [2020-07-21 16:40:57,899 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 16:40:57,900 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 16:40:57,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 16:40:57,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2020-07-21 16:40:57,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-21 16:40:57,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-07-21 16:40:57,909 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 21 [2020-07-21 16:40:57,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:40:57,909 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-07-21 16:40:57,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 16:40:57,910 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-07-21 16:40:57,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 16:40:57,911 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:40:57,911 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 16:40:58,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:40:58,127 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:40:58,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:40:58,128 INFO L82 PathProgramCache]: Analyzing trace with hash -395878216, now seen corresponding path program 1 times [2020-07-21 16:40:58,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:40:58,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383874978] [2020-07-21 16:40:58,129 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:40:58,187 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:40:58,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 16:40:58,188 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 16:40:58,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 16:40:58,207 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 16:40:58,233 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 16:40:58,234 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 16:40:58,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:40:58,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 04:40:58 BoogieIcfgContainer [2020-07-21 16:40:58,492 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 16:40:58,495 INFO L168 Benchmark]: Toolchain (without parser) took 2362.59 ms. Allocated memory was 143.1 MB in the beginning and 200.8 MB in the end (delta: 57.7 MB). Free memory was 99.7 MB in the beginning and 102.5 MB in the end (delta: -2.8 MB). Peak memory consumption was 54.9 MB. Max. memory is 7.1 GB. [2020-07-21 16:40:58,496 INFO L168 Benchmark]: CDTParser took 0.42 ms. Allocated memory is still 143.1 MB. Free memory was 118.1 MB in the beginning and 117.9 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-21 16:40:58,497 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.58 ms. Allocated memory is still 143.1 MB. Free memory was 99.3 MB in the beginning and 89.0 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-21 16:40:58,498 INFO L168 Benchmark]: Boogie Preprocessor took 135.92 ms. Allocated memory was 143.1 MB in the beginning and 200.8 MB in the end (delta: 57.7 MB). Free memory was 89.0 MB in the beginning and 178.0 MB in the end (delta: -89.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-21 16:40:58,499 INFO L168 Benchmark]: RCFGBuilder took 445.86 ms. Allocated memory is still 200.8 MB. Free memory was 178.0 MB in the beginning and 161.1 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 7.1 GB. [2020-07-21 16:40:58,500 INFO L168 Benchmark]: TraceAbstraction took 1483.28 ms. Allocated memory is still 200.8 MB. Free memory was 161.1 MB in the beginning and 102.5 MB in the end (delta: 58.5 MB). Peak memory consumption was 58.5 MB. Max. memory is 7.1 GB. [2020-07-21 16:40:58,504 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.42 ms. Allocated memory is still 143.1 MB. Free memory was 118.1 MB in the beginning and 117.9 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 290.58 ms. Allocated memory is still 143.1 MB. Free memory was 99.3 MB in the beginning and 89.0 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 135.92 ms. Allocated memory was 143.1 MB in the beginning and 200.8 MB in the end (delta: 57.7 MB). Free memory was 89.0 MB in the beginning and 178.0 MB in the end (delta: -89.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 445.86 ms. Allocated memory is still 200.8 MB. Free memory was 178.0 MB in the beginning and 161.1 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1483.28 ms. Allocated memory is still 200.8 MB. Free memory was 161.1 MB in the beginning and 102.5 MB in the end (delta: 58.5 MB). Peak memory consumption was 58.5 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)=3, 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] long long sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] i=0 VAL [\old(N)=0, a={21239:0}, i=0, malloc(sizeof(int)*N)={21239:0}, N=1, sum={21241:0}] [L29] COND TRUE i