/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 DAGSIZE --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/ifncompf.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 20:18:21,625 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 20:18:21,627 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 20:18:21,645 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 20:18:21,646 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 20:18:21,648 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 20:18:21,650 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 20:18:21,663 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 20:18:21,665 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 20:18:21,666 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 20:18:21,667 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 20:18:21,668 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 20:18:21,668 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 20:18:21,669 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 20:18:21,670 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 20:18:21,671 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 20:18:21,672 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 20:18:21,673 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 20:18:21,675 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 20:18:21,676 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 20:18:21,678 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 20:18:21,679 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 20:18:21,680 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 20:18:21,681 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 20:18:21,683 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 20:18:21,691 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 20:18:21,692 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 20:18:21,692 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 20:18:21,693 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 20:18:21,708 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 20:18:21,708 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 20:18:21,709 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 20:18:21,709 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 20:18:21,710 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 20:18:21,710 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 20:18:21,710 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 20:18:21,710 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 20:18:21,710 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 20:18:21,711 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 20:18:21,711 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 20:18:21,711 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 20:18:21,711 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 20:18:21,711 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 20:18:21,712 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 20:18:21,712 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 20:18:21,712 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 20:18:21,712 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 20:18:21,712 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 20:18:21,713 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 20:18:21,713 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 20:18:21,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 20:18:21,713 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 20:18:21,713 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 20:18:21,714 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 20:18:21,714 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 20:18:21,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:21,714 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 20:18:21,714 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 20:18:21,715 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 -> DAGSIZE 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 20:18:22,001 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 20:18:22,018 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 20:18:22,023 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 20:18:22,025 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 20:18:22,025 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 20:18:22,026 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ifncompf.c [2020-07-21 20:18:22,095 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01bfafab9/22bcb50342094d6f9aca9b4c76342088/FLAG0b3c134d3 [2020-07-21 20:18:22,583 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 20:18:22,584 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ifncompf.c [2020-07-21 20:18:22,594 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01bfafab9/22bcb50342094d6f9aca9b4c76342088/FLAG0b3c134d3 [2020-07-21 20:18:22,942 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01bfafab9/22bcb50342094d6f9aca9b4c76342088 [2020-07-21 20:18:22,952 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 20:18:22,955 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 20:18:22,956 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 20:18:22,956 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 20:18:22,960 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 20:18:22,961 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:18:22" (1/1) ... [2020-07-21 20:18:22,964 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dff1916 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:22, skipping insertion in model container [2020-07-21 20:18:22,964 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:18:22" (1/1) ... [2020-07-21 20:18:22,972 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 20:18:22,993 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 20:18:23,201 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:18:23,213 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 20:18:23,234 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:18:23,249 INFO L208 MainTranslator]: Completed translation [2020-07-21 20:18:23,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:23 WrapperNode [2020-07-21 20:18:23,250 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 20:18:23,251 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 20:18:23,251 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 20:18:23,251 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 20:18:23,350 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:23" (1/1) ... [2020-07-21 20:18:23,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:23" (1/1) ... [2020-07-21 20:18:23,360 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:23" (1/1) ... [2020-07-21 20:18:23,361 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:23" (1/1) ... [2020-07-21 20:18:23,370 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:23" (1/1) ... [2020-07-21 20:18:23,377 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:23" (1/1) ... [2020-07-21 20:18:23,379 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:23" (1/1) ... [2020-07-21 20:18:23,382 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 20:18:23,382 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 20:18:23,382 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 20:18:23,382 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 20:18:23,383 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:23" (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 20:18:23,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 20:18:23,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 20:18:23,459 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 20:18:23,459 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 20:18:23,459 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 20:18:23,459 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 20:18:23,460 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 20:18:23,460 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 20:18:23,460 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 20:18:23,460 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 20:18:23,460 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 20:18:23,461 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 20:18:23,461 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 20:18:23,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 20:18:23,461 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 20:18:23,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 20:18:23,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 20:18:23,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 20:18:23,779 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 20:18:23,779 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-07-21 20:18:23,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:18:23 BoogieIcfgContainer [2020-07-21 20:18:23,785 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 20:18:23,787 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 20:18:23,788 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 20:18:23,791 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 20:18:23,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:18:22" (1/3) ... [2020-07-21 20:18:23,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62392975 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:18:23, skipping insertion in model container [2020-07-21 20:18:23,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:23" (2/3) ... [2020-07-21 20:18:23,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62392975 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:18:23, skipping insertion in model container [2020-07-21 20:18:23,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:18:23" (3/3) ... [2020-07-21 20:18:23,796 INFO L109 eAbstractionObserver]: Analyzing ICFG ifncompf.c [2020-07-21 20:18:23,810 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 20:18:23,819 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 20:18:23,837 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 20:18:23,873 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 20:18:23,873 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 20:18:23,873 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 20:18:23,874 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 20:18:23,888 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 20:18:23,889 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 20:18:23,889 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 20:18:23,889 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 20:18:23,923 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-07-21 20:18:23,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 20:18:23,929 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:18:23,930 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] [2020-07-21 20:18:23,931 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:18:23,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:18:23,936 INFO L82 PathProgramCache]: Analyzing trace with hash -794599326, now seen corresponding path program 1 times [2020-07-21 20:18:23,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:18:23,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1013762947] [2020-07-21 20:18:23,945 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 20:18:24,044 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:18:24,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:18:24,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 20:18:24,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:18:24,125 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 20:18:24,126 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:18:24,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1013762947] [2020-07-21 20:18:24,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:18:24,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 20:18:24,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115967268] [2020-07-21 20:18:24,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 20:18:24,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:18:24,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 20:18:24,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 20:18:24,152 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 4 states. [2020-07-21 20:18:24,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:18:24,320 INFO L93 Difference]: Finished difference Result 87 states and 124 transitions. [2020-07-21 20:18:24,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 20:18:24,322 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-07-21 20:18:24,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:18:24,333 INFO L225 Difference]: With dead ends: 87 [2020-07-21 20:18:24,334 INFO L226 Difference]: Without dead ends: 48 [2020-07-21 20:18:24,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 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 20:18:24,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-21 20:18:24,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2020-07-21 20:18:24,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-21 20:18:24,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-07-21 20:18:24,389 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 24 [2020-07-21 20:18:24,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:18:24,390 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-07-21 20:18:24,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 20:18:24,391 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-07-21 20:18:24,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-21 20:18:24,392 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:18:24,392 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:18:24,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:24,600 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:18:24,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:18:24,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1796917477, now seen corresponding path program 1 times [2020-07-21 20:18:24,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:18:24,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345801862] [2020-07-21 20:18:24,603 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 20:18:24,679 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:18:24,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:18:24,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 20:18:24,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:18:24,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 20:18:24,700 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:18:24,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1345801862] [2020-07-21 20:18:24,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:18:24,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 20:18:24,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478763653] [2020-07-21 20:18:24,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 20:18:24,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:18:24,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 20:18:24,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:18:24,704 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 3 states. [2020-07-21 20:18:24,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:18:24,776 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2020-07-21 20:18:24,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 20:18:24,777 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-07-21 20:18:24,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:18:24,778 INFO L225 Difference]: With dead ends: 72 [2020-07-21 20:18:24,779 INFO L226 Difference]: Without dead ends: 48 [2020-07-21 20:18:24,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:18:24,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-21 20:18:24,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2020-07-21 20:18:24,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 20:18:24,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-07-21 20:18:24,791 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 33 [2020-07-21 20:18:24,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:18:24,792 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-07-21 20:18:24,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 20:18:24,792 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-07-21 20:18:24,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-21 20:18:24,794 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:18:24,794 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:18:25,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:25,009 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:18:25,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:18:25,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1817991449, now seen corresponding path program 1 times [2020-07-21 20:18:25,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:18:25,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544253930] [2020-07-21 20:18:25,010 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 20:18:25,077 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:18:25,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 20:18:25,078 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 20:18:25,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 20:18:25,116 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 20:18:25,148 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 20:18:25,148 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 20:18:25,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:25,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 08:18:25 BoogieIcfgContainer [2020-07-21 20:18:25,414 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 20:18:25,417 INFO L168 Benchmark]: Toolchain (without parser) took 2462.14 ms. Allocated memory was 144.7 MB in the beginning and 234.4 MB in the end (delta: 89.7 MB). Free memory was 101.2 MB in the beginning and 198.9 MB in the end (delta: -97.6 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 20:18:25,418 INFO L168 Benchmark]: CDTParser took 0.58 ms. Allocated memory is still 144.7 MB. Free memory was 119.6 MB in the beginning and 119.4 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 20:18:25,419 INFO L168 Benchmark]: CACSL2BoogieTranslator took 294.19 ms. Allocated memory is still 144.7 MB. Free memory was 100.8 MB in the beginning and 90.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-07-21 20:18:25,420 INFO L168 Benchmark]: Boogie Preprocessor took 131.22 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 90.2 MB in the beginning and 179.8 MB in the end (delta: -89.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-21 20:18:25,421 INFO L168 Benchmark]: RCFGBuilder took 403.61 ms. Allocated memory is still 202.4 MB. Free memory was 179.8 MB in the beginning and 160.9 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 7.1 GB. [2020-07-21 20:18:25,422 INFO L168 Benchmark]: TraceAbstraction took 1626.70 ms. Allocated memory was 202.4 MB in the beginning and 234.4 MB in the end (delta: 32.0 MB). Free memory was 160.2 MB in the beginning and 198.9 MB in the end (delta: -38.7 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 20:18:25,427 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.58 ms. Allocated memory is still 144.7 MB. Free memory was 119.6 MB in the beginning and 119.4 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 294.19 ms. Allocated memory is still 144.7 MB. Free memory was 100.8 MB in the beginning and 90.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 131.22 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 90.2 MB in the beginning and 179.8 MB in the end (delta: -89.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 403.61 ms. Allocated memory is still 202.4 MB. Free memory was 179.8 MB in the beginning and 160.9 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1626.70 ms. Allocated memory was 202.4 MB in the beginning and 234.4 MB in the end (delta: 32.0 MB). Free memory was 160.2 MB in the beginning and 198.9 MB in the end (delta: -38.7 MB). There was no memory consumed. 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); [L28] long long *c = malloc(sizeof(long long)*N); [L30] i=0 VAL [\old(N)=0, a={-1:0}, b={-2:0}, c={-3:0}, i=0, malloc(sizeof(long long)*N)={-1:0}, malloc(sizeof(long long)*N)={-2:0}, malloc(sizeof(long long)*N)={-3:0}, N=1] [L30] COND TRUE i