/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/ss1f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 16:43:17,940 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 16:43:17,943 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 16:43:17,967 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 16:43:17,967 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 16:43:17,969 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 16:43:17,971 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 16:43:17,973 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 16:43:17,975 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 16:43:17,977 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 16:43:17,978 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 16:43:17,980 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 16:43:17,980 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 16:43:17,982 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 16:43:17,983 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 16:43:17,985 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 16:43:17,986 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 16:43:17,987 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 16:43:17,990 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 16:43:17,993 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 16:43:17,995 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 16:43:17,996 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 16:43:17,998 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 16:43:17,999 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 16:43:18,003 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 16:43:18,013 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 16:43:18,015 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 16:43:18,016 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 16:43:18,017 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 16:43:18,052 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 16:43:18,052 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 16:43:18,054 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 16:43:18,055 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 16:43:18,055 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 16:43:18,056 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 16:43:18,056 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 16:43:18,056 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 16:43:18,056 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 16:43:18,056 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 16:43:18,057 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 16:43:18,057 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 16:43:18,057 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 16:43:18,059 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 16:43:18,059 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 16:43:18,059 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 16:43:18,059 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 16:43:18,060 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 16:43:18,060 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 16:43:18,060 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 16:43:18,061 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 16:43:18,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:43:18,061 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 16:43:18,061 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 16:43:18,062 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 16:43:18,062 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 16:43:18,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:43:18,062 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 16:43:18,062 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 16:43:18,063 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 16:43:18,426 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 16:43:18,445 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 16:43:18,449 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 16:43:18,450 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 16:43:18,453 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 16:43:18,454 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ss1f.c [2020-07-21 16:43:18,538 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8117aa92/c74c220db6a04f689b6eec7cd903c25f/FLAG2943822c7 [2020-07-21 16:43:19,078 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 16:43:19,079 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ss1f.c [2020-07-21 16:43:19,089 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8117aa92/c74c220db6a04f689b6eec7cd903c25f/FLAG2943822c7 [2020-07-21 16:43:19,369 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8117aa92/c74c220db6a04f689b6eec7cd903c25f [2020-07-21 16:43:19,381 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 16:43:19,386 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 16:43:19,387 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 16:43:19,387 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 16:43:19,391 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 16:43:19,393 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:43:19" (1/1) ... [2020-07-21 16:43:19,396 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15b386b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:43:19, skipping insertion in model container [2020-07-21 16:43:19,396 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:43:19" (1/1) ... [2020-07-21 16:43:19,406 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 16:43:19,426 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 16:43:19,627 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:43:19,642 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 16:43:19,668 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:43:19,687 INFO L208 MainTranslator]: Completed translation [2020-07-21 16:43:19,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:43:19 WrapperNode [2020-07-21 16:43:19,688 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 16:43:19,689 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 16:43:19,689 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 16:43:19,689 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 16:43:19,800 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:43:19" (1/1) ... [2020-07-21 16:43:19,801 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:43:19" (1/1) ... [2020-07-21 16:43:19,811 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:43:19" (1/1) ... [2020-07-21 16:43:19,811 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:43:19" (1/1) ... [2020-07-21 16:43:19,822 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:43:19" (1/1) ... [2020-07-21 16:43:19,829 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:43:19" (1/1) ... [2020-07-21 16:43:19,831 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:43:19" (1/1) ... [2020-07-21 16:43:19,834 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 16:43:19,834 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 16:43:19,835 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 16:43:19,835 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 16:43:19,836 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:43:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:43:19,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 16:43:19,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 16:43:19,900 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 16:43:19,901 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 16:43:19,901 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 16:43:19,901 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 16:43:19,901 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 16:43:19,901 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 16:43:19,901 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 16:43:19,902 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 16:43:19,902 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 16:43:19,902 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 16:43:19,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 16:43:19,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 16:43:19,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 16:43:19,903 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 16:43:19,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 16:43:19,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 16:43:19,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 16:43:20,222 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 16:43:20,223 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-07-21 16:43:20,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:43:20 BoogieIcfgContainer [2020-07-21 16:43:20,230 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 16:43:20,232 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 16:43:20,232 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 16:43:20,236 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 16:43:20,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:43:19" (1/3) ... [2020-07-21 16:43:20,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@557b1dc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:43:20, skipping insertion in model container [2020-07-21 16:43:20,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:43:19" (2/3) ... [2020-07-21 16:43:20,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@557b1dc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:43:20, skipping insertion in model container [2020-07-21 16:43:20,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:43:20" (3/3) ... [2020-07-21 16:43:20,240 INFO L109 eAbstractionObserver]: Analyzing ICFG ss1f.c [2020-07-21 16:43:20,261 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 16:43:20,274 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 16:43:20,297 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 16:43:20,331 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 16:43:20,332 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 16:43:20,332 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 16:43:20,332 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 16:43:20,333 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 16:43:20,333 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 16:43:20,334 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 16:43:20,334 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 16:43:20,394 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-07-21 16:43:20,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-21 16:43:20,415 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:43:20,416 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] [2020-07-21 16:43:20,417 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:43:20,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:43:20,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1562148239, now seen corresponding path program 1 times [2020-07-21 16:43:20,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:43:20,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481606861] [2020-07-21 16:43:20,437 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:43:20,548 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:43:20,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:43:20,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 16:43:20,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:43:20,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:43:20,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:43:20,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481606861] [2020-07-21 16:43:20,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:43:20,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 16:43:20,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733404160] [2020-07-21 16:43:20,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 16:43:20,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:43:20,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 16:43:20,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 16:43:20,613 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 2 states. [2020-07-21 16:43:20,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:43:20,646 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2020-07-21 16:43:20,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 16:43:20,648 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 25 [2020-07-21 16:43:20,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:43:20,658 INFO L225 Difference]: With dead ends: 64 [2020-07-21 16:43:20,659 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 16:43:20,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 16:43:20,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 16:43:20,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 16:43:20,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 16:43:20,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-07-21 16:43:20,707 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 25 [2020-07-21 16:43:20,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:43:20,708 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-07-21 16:43:20,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 16:43:20,708 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-07-21 16:43:20,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-21 16:43:20,710 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:43:20,710 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] [2020-07-21 16:43:20,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:43:20,918 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:43:20,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:43:20,919 INFO L82 PathProgramCache]: Analyzing trace with hash 369304979, now seen corresponding path program 1 times [2020-07-21 16:43:20,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:43:20,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52849108] [2020-07-21 16:43:20,922 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:43:20,986 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:43:20,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:43:20,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 16:43:20,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:43:21,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:43:21,036 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:43:21,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52849108] [2020-07-21 16:43:21,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:43:21,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 16:43:21,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478163026] [2020-07-21 16:43:21,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 16:43:21,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:43:21,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 16:43:21,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 16:43:21,041 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 4 states. [2020-07-21 16:43:21,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:43:21,173 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2020-07-21 16:43:21,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 16:43:21,174 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-07-21 16:43:21,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:43:21,175 INFO L225 Difference]: With dead ends: 53 [2020-07-21 16:43:21,176 INFO L226 Difference]: Without dead ends: 38 [2020-07-21 16:43:21,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 16:43:21,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-21 16:43:21,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-07-21 16:43:21,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-21 16:43:21,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-07-21 16:43:21,188 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 25 [2020-07-21 16:43:21,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:43:21,189 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-07-21 16:43:21,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 16:43:21,189 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-07-21 16:43:21,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-21 16:43:21,191 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:43:21,191 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 16:43:21,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:43:21,405 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:43:21,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:43:21,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1815337701, now seen corresponding path program 1 times [2020-07-21 16:43:21,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:43:21,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195901112] [2020-07-21 16:43:21,407 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:43:21,483 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:43:21,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 16:43:21,484 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 16:43:21,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 16:43:21,515 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 16:43:21,565 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 16:43:21,565 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 16:43:21,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:43:21,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 04:43:21 BoogieIcfgContainer [2020-07-21 16:43:21,829 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 16:43:21,836 INFO L168 Benchmark]: Toolchain (without parser) took 2449.96 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 102.3 MB in the beginning and 96.0 MB in the end (delta: 6.3 MB). Peak memory consumption was 70.8 MB. Max. memory is 7.1 GB. [2020-07-21 16:43:21,837 INFO L168 Benchmark]: CDTParser took 0.57 ms. Allocated memory is still 137.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-21 16:43:21,838 INFO L168 Benchmark]: CACSL2BoogieTranslator took 301.31 ms. Allocated memory is still 137.4 MB. Free memory was 101.9 MB in the beginning and 91.3 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-07-21 16:43:21,840 INFO L168 Benchmark]: Boogie Preprocessor took 145.47 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 91.3 MB in the beginning and 179.3 MB in the end (delta: -88.0 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-07-21 16:43:21,842 INFO L168 Benchmark]: RCFGBuilder took 395.58 ms. Allocated memory is still 201.9 MB. Free memory was 179.3 MB in the beginning and 161.0 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 7.1 GB. [2020-07-21 16:43:21,843 INFO L168 Benchmark]: TraceAbstraction took 1597.09 ms. Allocated memory is still 201.9 MB. Free memory was 160.3 MB in the beginning and 96.0 MB in the end (delta: 64.3 MB). Peak memory consumption was 64.3 MB. Max. memory is 7.1 GB. [2020-07-21 16:43:21,851 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.57 ms. Allocated memory is still 137.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 301.31 ms. Allocated memory is still 137.4 MB. Free memory was 101.9 MB in the beginning and 91.3 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 145.47 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 91.3 MB in the beginning and 179.3 MB in the end (delta: -88.0 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 395.58 ms. Allocated memory is still 201.9 MB. Free memory was 179.3 MB in the beginning and 161.0 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1597.09 ms. Allocated memory is still 201.9 MB. Free memory was 160.3 MB in the beginning and 96.0 MB in the end (delta: 64.3 MB). Peak memory consumption was 64.3 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)=5, N=0] [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=1] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=1] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=1] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=1] [L25] int i; [L26] long long sum[1]; [L27] long long *a = malloc(sizeof(long long)*N); [L29] sum[0] = 0 [L30] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(long long)*N)={-1:0}, N=1, sum={2:0}] [L30] COND TRUE i