/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 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/nsqmf.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 17:39:06,641 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 17:39:06,644 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 17:39:06,662 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 17:39:06,663 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 17:39:06,664 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 17:39:06,665 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 17:39:06,667 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 17:39:06,668 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 17:39:06,669 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 17:39:06,670 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 17:39:06,671 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 17:39:06,672 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 17:39:06,673 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 17:39:06,674 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 17:39:06,675 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 17:39:06,675 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 17:39:06,676 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 17:39:06,678 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 17:39:06,680 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 17:39:06,681 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 17:39:06,682 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 17:39:06,684 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 17:39:06,684 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 17:39:06,687 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 17:39:06,695 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 17:39:06,695 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 17:39:06,696 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 17:39:06,697 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 [2020-07-20 17:39:06,716 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 17:39:06,716 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 17:39:06,718 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 17:39:06,718 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 17:39:06,718 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 17:39:06,718 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 17:39:06,718 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 17:39:06,719 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 17:39:06,719 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 17:39:06,719 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 17:39:06,719 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 17:39:06,719 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 17:39:06,720 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 17:39:06,720 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 17:39:06,720 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 17:39:06,720 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 17:39:06,720 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 17:39:06,721 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 17:39:06,721 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 17:39:06,721 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 17:39:06,721 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 17:39:06,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:39:06,722 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 17:39:06,722 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 17:39:06,722 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 17:39:06,722 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 17:39:06,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:39:06,723 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 17:39:06,723 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 17:39:06,723 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 -> 4 [2020-07-20 17:39:06,983 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 17:39:06,996 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 17:39:06,999 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 17:39:07,001 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 17:39:07,001 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 17:39:07,002 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/nsqmf.c [2020-07-20 17:39:07,076 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c93c0a49a/66e38ee1c4ab4ed497cd7eddbd438511/FLAG4f28e61e3 [2020-07-20 17:39:07,532 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 17:39:07,534 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/nsqmf.c [2020-07-20 17:39:07,541 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c93c0a49a/66e38ee1c4ab4ed497cd7eddbd438511/FLAG4f28e61e3 [2020-07-20 17:39:07,906 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c93c0a49a/66e38ee1c4ab4ed497cd7eddbd438511 [2020-07-20 17:39:07,916 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 17:39:07,919 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 17:39:07,921 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 17:39:07,921 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 17:39:07,926 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 17:39:07,927 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:39:07" (1/1) ... [2020-07-20 17:39:07,930 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@241e4152 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:39:07, skipping insertion in model container [2020-07-20 17:39:07,930 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:39:07" (1/1) ... [2020-07-20 17:39:07,938 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 17:39:07,961 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 17:39:08,175 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:39:08,185 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 17:39:08,205 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:39:08,220 INFO L208 MainTranslator]: Completed translation [2020-07-20 17:39:08,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:39:08 WrapperNode [2020-07-20 17:39:08,220 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 17:39:08,221 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 17:39:08,221 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 17:39:08,221 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 17:39:08,317 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:39:08" (1/1) ... [2020-07-20 17:39:08,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:39:08" (1/1) ... [2020-07-20 17:39:08,327 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:39:08" (1/1) ... [2020-07-20 17:39:08,327 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:39:08" (1/1) ... [2020-07-20 17:39:08,342 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:39:08" (1/1) ... [2020-07-20 17:39:08,348 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:39:08" (1/1) ... [2020-07-20 17:39:08,349 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:39:08" (1/1) ... [2020-07-20 17:39:08,351 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 17:39:08,352 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 17:39:08,352 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 17:39:08,352 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 17:39:08,353 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:39:08" (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 [2020-07-20 17:39:08,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 17:39:08,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 17:39:08,411 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 17:39:08,411 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 17:39:08,411 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 17:39:08,412 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 17:39:08,412 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 17:39:08,412 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 17:39:08,412 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 17:39:08,412 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 17:39:08,412 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 17:39:08,413 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 17:39:08,413 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 17:39:08,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 17:39:08,413 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 17:39:08,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 17:39:08,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 17:39:08,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 17:39:08,712 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 17:39:08,712 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-20 17:39:08,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:39:08 BoogieIcfgContainer [2020-07-20 17:39:08,716 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 17:39:08,717 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 17:39:08,717 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 17:39:08,720 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 17:39:08,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:39:07" (1/3) ... [2020-07-20 17:39:08,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@400b509a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:39:08, skipping insertion in model container [2020-07-20 17:39:08,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:39:08" (2/3) ... [2020-07-20 17:39:08,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@400b509a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:39:08, skipping insertion in model container [2020-07-20 17:39:08,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:39:08" (3/3) ... [2020-07-20 17:39:08,724 INFO L109 eAbstractionObserver]: Analyzing ICFG nsqmf.c [2020-07-20 17:39:08,735 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 17:39:08,742 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 17:39:08,768 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 17:39:08,794 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 17:39:08,794 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 17:39:08,794 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 17:39:08,795 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 17:39:08,795 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 17:39:08,795 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 17:39:08,795 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 17:39:08,795 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 17:39:08,814 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-07-20 17:39:08,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 17:39:08,821 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:39:08,822 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] [2020-07-20 17:39:08,822 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:39:08,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:39:08,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1314760119, now seen corresponding path program 1 times [2020-07-20 17:39:08,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:39:08,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683447698] [2020-07-20 17:39:08,836 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 [2020-07-20 17:39:08,965 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:39:08,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:39:08,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 17:39:08,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:39:08,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:39:08,996 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:39:08,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683447698] [2020-07-20 17:39:08,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:39:08,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 17:39:08,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468236470] [2020-07-20 17:39:09,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 17:39:09,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:39:09,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 17:39:09,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 17:39:09,021 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 2 states. [2020-07-20 17:39:09,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:39:09,047 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2020-07-20 17:39:09,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 17:39:09,049 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2020-07-20 17:39:09,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:39:09,057 INFO L225 Difference]: With dead ends: 58 [2020-07-20 17:39:09,057 INFO L226 Difference]: Without dead ends: 29 [2020-07-20 17:39:09,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 17:39:09,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-20 17:39:09,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-07-20 17:39:09,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-20 17:39:09,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-07-20 17:39:09,099 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 22 [2020-07-20 17:39:09,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:39:09,100 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-07-20 17:39:09,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 17:39:09,100 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-07-20 17:39:09,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 17:39:09,101 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:39:09,102 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] [2020-07-20 17:39:09,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:39:09,316 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:39:09,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:39:09,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1901566133, now seen corresponding path program 1 times [2020-07-20 17:39:09,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:39:09,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759290753] [2020-07-20 17:39:09,318 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 [2020-07-20 17:39:09,404 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:39:09,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 17:39:09,405 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 17:39:09,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 17:39:09,423 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 17:39:09,449 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 17:39:09,450 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 17:39:09,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:39:09,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:39:09 BoogieIcfgContainer [2020-07-20 17:39:09,705 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 17:39:09,707 INFO L168 Benchmark]: Toolchain (without parser) took 1789.00 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 101.8 MB in the beginning and 123.6 MB in the end (delta: -21.8 MB). Peak memory consumption was 42.7 MB. Max. memory is 7.1 GB. [2020-07-20 17:39:09,708 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 137.9 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-20 17:39:09,710 INFO L168 Benchmark]: CACSL2BoogieTranslator took 299.72 ms. Allocated memory is still 137.9 MB. Free memory was 101.4 MB in the beginning and 90.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-07-20 17:39:09,713 INFO L168 Benchmark]: Boogie Preprocessor took 130.49 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 90.7 MB in the beginning and 179.7 MB in the end (delta: -89.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-07-20 17:39:09,714 INFO L168 Benchmark]: RCFGBuilder took 364.12 ms. Allocated memory is still 202.4 MB. Free memory was 179.7 MB in the beginning and 163.2 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. [2020-07-20 17:39:09,715 INFO L168 Benchmark]: TraceAbstraction took 987.60 ms. Allocated memory is still 202.4 MB. Free memory was 162.6 MB in the beginning and 123.6 MB in the end (delta: 38.9 MB). Peak memory consumption was 38.9 MB. Max. memory is 7.1 GB. [2020-07-20 17:39:09,719 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 137.9 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 299.72 ms. Allocated memory is still 137.9 MB. Free memory was 101.4 MB in the beginning and 90.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 130.49 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 90.7 MB in the beginning and 179.7 MB in the end (delta: -89.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 364.12 ms. Allocated memory is still 202.4 MB. Free memory was 179.7 MB in the beginning and 163.2 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 987.60 ms. Allocated memory is still 202.4 MB. Free memory was 162.6 MB in the beginning and 123.6 MB in the end (delta: 38.9 MB). Peak memory consumption was 38.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; VAL [\old(N)=2, 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 *a = malloc(sizeof(long long)*N); [L27] long long *b = malloc(sizeof(long long)*N); [L29] b[0] = 1 [L30] a[0] = 1 [L32] i=1 VAL [\old(N)=0, a={-1:0}, b={-2:0}, i=1, malloc(sizeof(long long)*N)={-1:0}, malloc(sizeof(long long)*N)={-2:0}, N=1] [L32] COND FALSE !(i