/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/ifeqn5f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 17:37:40,777 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 17:37:40,779 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 17:37:40,791 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 17:37:40,792 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 17:37:40,793 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 17:37:40,794 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 17:37:40,796 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 17:37:40,798 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 17:37:40,798 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 17:37:40,799 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 17:37:40,800 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 17:37:40,801 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 17:37:40,802 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 17:37:40,803 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 17:37:40,804 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 17:37:40,805 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 17:37:40,806 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 17:37:40,807 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 17:37:40,810 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 17:37:40,812 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 17:37:40,813 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 17:37:40,817 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 17:37:40,817 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 17:37:40,822 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 17:37:40,835 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 17:37:40,836 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 17:37:40,837 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 17:37:40,838 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 17:37:40,864 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 17:37:40,864 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 17:37:40,866 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 17:37:40,866 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 17:37:40,866 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 17:37:40,866 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 17:37:40,867 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 17:37:40,867 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 17:37:40,867 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 17:37:40,867 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 17:37:40,868 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 17:37:40,868 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 17:37:40,869 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 17:37:40,869 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 17:37:40,869 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 17:37:40,869 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 17:37:40,870 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 17:37:40,870 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 17:37:40,870 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 17:37:40,870 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 17:37:40,870 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 17:37:40,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:37:40,871 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 17:37:40,871 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 17:37:40,871 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 17:37:40,871 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 17:37:40,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:37:40,872 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 17:37:40,872 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 17:37:40,872 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 17:37:41,181 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 17:37:41,202 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 17:37:41,205 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 17:37:41,207 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 17:37:41,207 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 17:37:41,208 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ifeqn5f.c [2020-07-20 17:37:41,266 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c8412018/e8897b8369814c6a9c62efbce48d3802/FLAG742f453a5 [2020-07-20 17:37:41,670 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 17:37:41,670 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ifeqn5f.c [2020-07-20 17:37:41,681 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c8412018/e8897b8369814c6a9c62efbce48d3802/FLAG742f453a5 [2020-07-20 17:37:42,017 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c8412018/e8897b8369814c6a9c62efbce48d3802 [2020-07-20 17:37:42,025 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 17:37:42,028 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 17:37:42,029 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 17:37:42,029 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 17:37:42,033 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 17:37:42,034 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:37:42" (1/1) ... [2020-07-20 17:37:42,036 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@262292b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:37:42, skipping insertion in model container [2020-07-20 17:37:42,037 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:37:42" (1/1) ... [2020-07-20 17:37:42,044 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 17:37:42,061 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 17:37:42,251 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:37:42,261 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 17:37:42,282 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:37:42,299 INFO L208 MainTranslator]: Completed translation [2020-07-20 17:37:42,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:37:42 WrapperNode [2020-07-20 17:37:42,299 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 17:37:42,300 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 17:37:42,300 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 17:37:42,300 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 17:37:42,394 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:37:42" (1/1) ... [2020-07-20 17:37:42,394 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:37:42" (1/1) ... [2020-07-20 17:37:42,401 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:37:42" (1/1) ... [2020-07-20 17:37:42,402 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:37:42" (1/1) ... [2020-07-20 17:37:42,409 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:37:42" (1/1) ... [2020-07-20 17:37:42,414 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:37:42" (1/1) ... [2020-07-20 17:37:42,416 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:37:42" (1/1) ... [2020-07-20 17:37:42,418 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 17:37:42,419 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 17:37:42,419 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 17:37:42,419 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 17:37:42,420 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:37:42" (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 17:37:42,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 17:37:42,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 17:37:42,477 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 17:37:42,477 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 17:37:42,477 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 17:37:42,478 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 17:37:42,478 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 17:37:42,479 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 17:37:42,479 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 17:37:42,479 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 17:37:42,480 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 17:37:42,480 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 17:37:42,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 17:37:42,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 17:37:42,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 17:37:42,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 17:37:42,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 17:37:42,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 17:37:42,808 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 17:37:42,809 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-20 17:37:42,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:37:42 BoogieIcfgContainer [2020-07-20 17:37:42,813 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 17:37:42,814 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 17:37:42,814 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 17:37:42,817 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 17:37:42,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:37:42" (1/3) ... [2020-07-20 17:37:42,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@166265a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:37:42, skipping insertion in model container [2020-07-20 17:37:42,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:37:42" (2/3) ... [2020-07-20 17:37:42,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@166265a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:37:42, skipping insertion in model container [2020-07-20 17:37:42,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:37:42" (3/3) ... [2020-07-20 17:37:42,821 INFO L109 eAbstractionObserver]: Analyzing ICFG ifeqn5f.c [2020-07-20 17:37:42,831 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 17:37:42,838 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 17:37:42,850 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 17:37:42,872 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 17:37:42,872 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 17:37:42,872 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 17:37:42,872 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 17:37:42,872 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 17:37:42,872 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 17:37:42,873 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 17:37:42,873 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 17:37:42,890 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-07-20 17:37:42,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 17:37:42,895 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:37:42,896 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 17:37:42,896 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:37:42,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:37:42,901 INFO L82 PathProgramCache]: Analyzing trace with hash -294712258, now seen corresponding path program 1 times [2020-07-20 17:37:42,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:37:42,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928986172] [2020-07-20 17:37:42,909 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 17:37:43,004 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:37:43,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:37:43,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 17:37:43,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:37:43,032 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 17:37:43,033 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:37:43,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1928986172] [2020-07-20 17:37:43,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:37:43,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 17:37:43,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24245005] [2020-07-20 17:37:43,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 17:37:43,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:37:43,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 17:37:43,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 17:37:43,057 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 2 states. [2020-07-20 17:37:43,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:37:43,082 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2020-07-20 17:37:43,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 17:37:43,084 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2020-07-20 17:37:43,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:37:43,092 INFO L225 Difference]: With dead ends: 62 [2020-07-20 17:37:43,092 INFO L226 Difference]: Without dead ends: 31 [2020-07-20 17:37:43,095 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 17:37:43,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-20 17:37:43,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-07-20 17:37:43,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-20 17:37:43,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-07-20 17:37:43,133 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-07-20 17:37:43,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:37:43,134 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-07-20 17:37:43,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 17:37:43,134 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-07-20 17:37:43,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 17:37:43,135 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:37:43,135 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 17:37:43,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:37:43,349 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:37:43,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:37:43,351 INFO L82 PathProgramCache]: Analyzing trace with hash -2054124171, now seen corresponding path program 1 times [2020-07-20 17:37:43,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:37:43,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [278974362] [2020-07-20 17:37:43,352 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 17:37:43,424 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:37:43,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:37:43,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 17:37:43,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:37:43,494 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 17:37:43,500 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:37:43,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [278974362] [2020-07-20 17:37:43,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:37:43,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 17:37:43,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564358346] [2020-07-20 17:37:43,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 17:37:43,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:37:43,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 17:37:43,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 17:37:43,506 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 4 states. [2020-07-20 17:37:43,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:37:43,590 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2020-07-20 17:37:43,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 17:37:43,591 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-07-20 17:37:43,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:37:43,594 INFO L225 Difference]: With dead ends: 56 [2020-07-20 17:37:43,595 INFO L226 Difference]: Without dead ends: 41 [2020-07-20 17:37:43,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 17:37:43,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-20 17:37:43,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-07-20 17:37:43,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 17:37:43,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-07-20 17:37:43,608 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2020-07-20 17:37:43,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:37:43,608 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-07-20 17:37:43,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 17:37:43,609 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-07-20 17:37:43,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 17:37:43,610 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:37:43,610 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] [2020-07-20 17:37:43,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:37:43,824 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:37:43,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:37:43,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1477618916, now seen corresponding path program 1 times [2020-07-20 17:37:43,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:37:43,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507127538] [2020-07-20 17:37:43,826 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 [2020-07-20 17:37:43,899 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:37:43,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 17:37:43,900 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 17:37:43,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 17:37:43,918 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 17:37:43,942 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 17:37:43,942 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 17:37:44,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:37:44,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:37:44 BoogieIcfgContainer [2020-07-20 17:37:44,200 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 17:37:44,204 INFO L168 Benchmark]: Toolchain (without parser) took 2174.79 ms. Allocated memory was 146.8 MB in the beginning and 203.9 MB in the end (delta: 57.1 MB). Free memory was 104.2 MB in the beginning and 101.0 MB in the end (delta: 3.2 MB). Peak memory consumption was 60.4 MB. Max. memory is 7.1 GB. [2020-07-20 17:37:44,206 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 146.8 MB. Free memory was 123.0 MB in the beginning and 122.8 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-20 17:37:44,208 INFO L168 Benchmark]: CACSL2BoogieTranslator took 270.75 ms. Allocated memory is still 146.8 MB. Free memory was 103.8 MB in the beginning and 93.4 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-20 17:37:44,210 INFO L168 Benchmark]: Boogie Preprocessor took 118.10 ms. Allocated memory was 146.8 MB in the beginning and 203.9 MB in the end (delta: 57.1 MB). Free memory was 93.4 MB in the beginning and 181.4 MB in the end (delta: -88.0 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-20 17:37:44,212 INFO L168 Benchmark]: RCFGBuilder took 394.40 ms. Allocated memory is still 203.9 MB. Free memory was 181.4 MB in the beginning and 163.9 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 7.1 GB. [2020-07-20 17:37:44,215 INFO L168 Benchmark]: TraceAbstraction took 1385.93 ms. Allocated memory is still 203.9 MB. Free memory was 163.3 MB in the beginning and 101.0 MB in the end (delta: 62.2 MB). Peak memory consumption was 62.2 MB. Max. memory is 7.1 GB. [2020-07-20 17:37:44,223 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 146.8 MB. Free memory was 123.0 MB in the beginning and 122.8 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 270.75 ms. Allocated memory is still 146.8 MB. Free memory was 103.8 MB in the beginning and 93.4 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 118.10 ms. Allocated memory was 146.8 MB in the beginning and 203.9 MB in the end (delta: 57.1 MB). Free memory was 93.4 MB in the beginning and 181.4 MB in the end (delta: -88.0 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 394.40 ms. Allocated memory is still 203.9 MB. Free memory was 181.4 MB in the beginning and 163.9 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1385.93 ms. Allocated memory is still 203.9 MB. Free memory was 163.3 MB in the beginning and 101.0 MB in the end (delta: 62.2 MB). Peak memory consumption was 62.2 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] i=0 VAL [\old(N)=0, a={-1:0}, b={-2:0}, i=0, malloc(sizeof(long long)*N)={-1:0}, malloc(sizeof(long long)*N)={-2:0}, N=1] [L29] COND TRUE i