/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_FUNCTIONS --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/s2iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 14:16:21,341 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 14:16:21,344 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 14:16:21,366 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 14:16:21,367 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 14:16:21,369 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 14:16:21,371 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 14:16:21,384 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 14:16:21,388 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 14:16:21,392 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 14:16:21,394 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 14:16:21,396 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 14:16:21,396 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 14:16:21,399 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 14:16:21,402 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 14:16:21,404 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 14:16:21,406 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 14:16:21,409 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 14:16:21,411 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 14:16:21,416 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 14:16:21,422 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 14:16:21,427 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 14:16:21,428 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 14:16:21,429 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 14:16:21,432 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 14:16:21,442 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 14:16:21,444 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 14:16:21,445 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 14:16:21,446 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 14:16:21,486 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 14:16:21,487 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 14:16:21,491 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 14:16:21,492 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 14:16:21,492 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 14:16:21,492 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 14:16:21,492 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 14:16:21,493 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 14:16:21,493 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 14:16:21,493 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 14:16:21,495 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 14:16:21,496 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 14:16:21,496 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 14:16:21,496 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 14:16:21,496 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 14:16:21,496 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 14:16:21,497 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 14:16:21,497 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 14:16:21,497 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 14:16:21,497 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 14:16:21,497 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 14:16:21,498 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 14:16:21,498 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 14:16:21,498 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 14:16:21,500 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 14:16:21,501 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 14:16:21,501 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:16:21,501 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 14:16:21,501 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 14:16:21,501 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_FUNCTIONS 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 14:16:21,852 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 14:16:21,869 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 14:16:21,875 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 14:16:21,876 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 14:16:21,878 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 14:16:21,880 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s2iff.c [2020-07-20 14:16:21,976 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5db96df7e/5738bcedb6244b0dba1f6f4306a020ad/FLAG3152fa157 [2020-07-20 14:16:22,535 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 14:16:22,536 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s2iff.c [2020-07-20 14:16:22,545 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5db96df7e/5738bcedb6244b0dba1f6f4306a020ad/FLAG3152fa157 [2020-07-20 14:16:22,886 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5db96df7e/5738bcedb6244b0dba1f6f4306a020ad [2020-07-20 14:16:22,895 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 14:16:22,898 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 14:16:22,900 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 14:16:22,900 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 14:16:22,906 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 14:16:22,907 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:16:22" (1/1) ... [2020-07-20 14:16:22,911 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38a584d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:16:22, skipping insertion in model container [2020-07-20 14:16:22,911 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:16:22" (1/1) ... [2020-07-20 14:16:22,920 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 14:16:22,941 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 14:16:23,125 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:16:23,136 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 14:16:23,156 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:16:23,175 INFO L208 MainTranslator]: Completed translation [2020-07-20 14:16:23,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:16:23 WrapperNode [2020-07-20 14:16:23,175 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 14:16:23,176 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 14:16:23,177 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 14:16:23,177 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 14:16:23,276 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:16:23" (1/1) ... [2020-07-20 14:16:23,276 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:16:23" (1/1) ... [2020-07-20 14:16:23,286 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:16:23" (1/1) ... [2020-07-20 14:16:23,287 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:16:23" (1/1) ... [2020-07-20 14:16:23,296 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:16:23" (1/1) ... [2020-07-20 14:16:23,302 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:16:23" (1/1) ... [2020-07-20 14:16:23,304 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:16:23" (1/1) ... [2020-07-20 14:16:23,307 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 14:16:23,307 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 14:16:23,308 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 14:16:23,308 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 14:16:23,309 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:16:23" (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 [2020-07-20 14:16:23,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 14:16:23,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 14:16:23,404 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 14:16:23,404 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 14:16:23,405 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 14:16:23,406 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 14:16:23,407 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 14:16:23,407 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 14:16:23,407 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 14:16:23,407 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 14:16:23,408 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 14:16:23,409 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 14:16:23,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 14:16:23,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 14:16:23,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 14:16:23,412 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 14:16:23,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 14:16:23,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 14:16:23,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 14:16:23,846 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 14:16:23,846 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-20 14:16:23,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:16:23 BoogieIcfgContainer [2020-07-20 14:16:23,851 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 14:16:23,855 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 14:16:23,856 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 14:16:23,859 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 14:16:23,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 02:16:22" (1/3) ... [2020-07-20 14:16:23,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@668d474b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:16:23, skipping insertion in model container [2020-07-20 14:16:23,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:16:23" (2/3) ... [2020-07-20 14:16:23,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@668d474b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:16:23, skipping insertion in model container [2020-07-20 14:16:23,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:16:23" (3/3) ... [2020-07-20 14:16:23,864 INFO L109 eAbstractionObserver]: Analyzing ICFG s2iff.c [2020-07-20 14:16:23,875 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 14:16:23,881 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 14:16:23,896 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 14:16:23,924 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 14:16:23,924 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 14:16:23,925 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 14:16:23,925 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 14:16:23,925 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 14:16:23,926 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 14:16:23,926 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 14:16:23,926 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 14:16:23,949 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-07-20 14:16:23,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 14:16:23,957 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:16:23,958 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:16:23,959 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:16:23,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:16:23,966 INFO L82 PathProgramCache]: Analyzing trace with hash -432131487, now seen corresponding path program 1 times [2020-07-20 14:16:23,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:16:23,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557282873] [2020-07-20 14:16:23,977 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 14:16:24,084 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 14:16:24,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:16:24,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 14:16:24,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:16:24,167 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 14:16:24,167 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:16:24,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557282873] [2020-07-20 14:16:24,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:16:24,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 14:16:24,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017891903] [2020-07-20 14:16:24,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 14:16:24,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:16:24,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 14:16:24,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 14:16:24,195 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 4 states. [2020-07-20 14:16:24,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:16:24,343 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2020-07-20 14:16:24,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 14:16:24,346 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-07-20 14:16:24,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:16:24,357 INFO L225 Difference]: With dead ends: 63 [2020-07-20 14:16:24,357 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 14:16:24,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 14:16:24,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 14:16:24,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-07-20 14:16:24,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 14:16:24,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-07-20 14:16:24,413 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2020-07-20 14:16:24,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:16:24,413 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-07-20 14:16:24,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 14:16:24,414 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-07-20 14:16:24,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 14:16:24,415 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:16:24,415 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] [2020-07-20 14:16:24,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:16:24,631 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:16:24,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:16:24,632 INFO L82 PathProgramCache]: Analyzing trace with hash -445719797, now seen corresponding path program 1 times [2020-07-20 14:16:24,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:16:24,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824390990] [2020-07-20 14:16:24,633 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 14:16:24,718 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:16:24,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:16:24,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 14:16:24,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:16:24,861 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-20 14:16:24,861 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 14:16:24,872 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 14:16:24,873 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 14:16:24,874 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2020-07-20 14:16:24,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 14:16:24,933 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-07-20 14:16:24,935 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 14:16:24,951 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 14:16:24,954 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 14:16:24,954 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:30 [2020-07-20 14:16:25,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 14:16:25,111 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 14:16:25,112 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 57 [2020-07-20 14:16:25,115 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 14:16:25,168 INFO L624 ElimStorePlain]: treesize reduction 22, result has 69.4 percent of original size [2020-07-20 14:16:25,174 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-07-20 14:16:25,175 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:69, output treesize:50 [2020-07-20 14:16:25,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 14:16:25,416 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 14:16:25,417 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 28 [2020-07-20 14:16:25,418 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-07-20 14:16:25,448 INFO L624 ElimStorePlain]: treesize reduction 13, result has 65.8 percent of original size [2020-07-20 14:16:25,450 INFO L544 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 14:16:25,451 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:55, output treesize:12 [2020-07-20 14:16:25,480 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 14:16:25,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:16:25,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:16:25,582 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:16:27,931 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_main_~i~0_17 Int) (main_~a~0.offset Int)) (let ((.cse1 (store (select |c_#memory_int| c_main_~a~0.base) (+ (* c_main_~i~0 4) main_~a~0.offset) 2))) (let ((.cse0 (select .cse1 (+ (* v_main_~i~0_17 4) main_~a~0.offset)))) (or (< 0 v_main_~i~0_17) (not (= 2 .cse0)) (< (div (+ (* .cse0 (- 1)) (* (select (select (store |c_#memory_int| c_main_~a~0.base .cse1) |c_main_~#sum~0.base|) |c_main_~#sum~0.offset|) (- 1)) (- 1)) (- 3)) (+ c_main_~i~0 3)) (< v_main_~i~0_17 c_main_~i~0))))) (forall ((v_main_~i~0_17 Int) (main_~a~0.offset Int)) (let ((.cse3 (store (select |c_#memory_int| c_main_~a~0.base) (+ (* c_main_~i~0 4) main_~a~0.offset) 2))) (let ((.cse2 (select .cse3 (+ (* v_main_~i~0_17 4) main_~a~0.offset)))) (or (< 0 v_main_~i~0_17) (not (= 2 .cse2)) (< v_main_~i~0_17 (div (+ (* .cse2 (- 1)) (* (select (select (store |c_#memory_int| c_main_~a~0.base .cse3) |c_main_~#sum~0.base|) |c_main_~#sum~0.offset|) (- 1))) (- 3))) (< v_main_~i~0_17 c_main_~i~0)))))) is different from false [2020-07-20 14:16:27,961 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:16:28,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2020-07-20 14:16:28,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824390990] [2020-07-20 14:16:28,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:16:28,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-07-20 14:16:28,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608529524] [2020-07-20 14:16:28,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 14:16:28,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:16:28,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 14:16:28,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=285, Unknown=1, NotChecked=34, Total=380 [2020-07-20 14:16:28,023 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 20 states. [2020-07-20 14:16:28,667 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2020-07-20 14:16:29,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:16:29,358 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2020-07-20 14:16:29,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 14:16:29,359 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 26 [2020-07-20 14:16:29,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:16:29,363 INFO L225 Difference]: With dead ends: 42 [2020-07-20 14:16:29,364 INFO L226 Difference]: Without dead ends: 34 [2020-07-20 14:16:29,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=150, Invalid=723, Unknown=1, NotChecked=56, Total=930 [2020-07-20 14:16:29,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-20 14:16:29,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2020-07-20 14:16:29,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 14:16:29,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-07-20 14:16:29,373 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 26 [2020-07-20 14:16:29,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:16:29,374 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-07-20 14:16:29,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 14:16:29,374 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-07-20 14:16:29,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 14:16:29,375 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:16:29,375 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 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 14:16:29,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:16:29,590 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:16:29,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:16:29,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1018004383, now seen corresponding path program 2 times [2020-07-20 14:16:29,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:16:29,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1948770005] [2020-07-20 14:16:29,593 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 14:16:29,646 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:16:29,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:16:29,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 14:16:29,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:16:29,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:16:29,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:16:29,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:16:29,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1948770005] [2020-07-20 14:16:29,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:16:29,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-20 14:16:29,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035407465] [2020-07-20 14:16:29,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 14:16:29,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:16:29,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 14:16:29,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-20 14:16:29,741 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 9 states. [2020-07-20 14:16:29,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:16:29,898 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2020-07-20 14:16:29,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 14:16:29,899 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-07-20 14:16:29,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:16:29,900 INFO L225 Difference]: With dead ends: 49 [2020-07-20 14:16:29,901 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 14:16:29,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-07-20 14:16:29,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 14:16:29,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-07-20 14:16:29,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-20 14:16:29,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-07-20 14:16:29,908 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 29 [2020-07-20 14:16:29,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:16:29,909 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-07-20 14:16:29,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 14:16:29,909 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-07-20 14:16:29,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 14:16:29,910 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:16:29,911 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:16:30,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:16:30,125 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:16:30,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:16:30,126 INFO L82 PathProgramCache]: Analyzing trace with hash 2056219107, now seen corresponding path program 3 times [2020-07-20 14:16:30,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:16:30,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1068256833] [2020-07-20 14:16:30,128 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 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:16:30,185 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:16:30,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 14:16:30,185 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 14:16:30,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 14:16:30,204 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 14:16:30,233 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 14:16:30,233 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 14:16:30,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:16:30,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 02:16:30 BoogieIcfgContainer [2020-07-20 14:16:30,488 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 14:16:30,490 INFO L168 Benchmark]: Toolchain (without parser) took 7593.13 ms. Allocated memory was 145.8 MB in the beginning and 244.3 MB in the end (delta: 98.6 MB). Free memory was 103.1 MB in the beginning and 130.3 MB in the end (delta: -27.2 MB). Peak memory consumption was 71.4 MB. Max. memory is 7.1 GB. [2020-07-20 14:16:30,491 INFO L168 Benchmark]: CDTParser took 0.61 ms. Allocated memory is still 145.8 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 14:16:30,492 INFO L168 Benchmark]: CACSL2BoogieTranslator took 276.39 ms. Allocated memory is still 145.8 MB. Free memory was 102.6 MB in the beginning and 92.3 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-20 14:16:30,493 INFO L168 Benchmark]: Boogie Preprocessor took 130.41 ms. Allocated memory was 145.8 MB in the beginning and 201.9 MB in the end (delta: 56.1 MB). Free memory was 92.3 MB in the beginning and 179.9 MB in the end (delta: -87.6 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-07-20 14:16:30,494 INFO L168 Benchmark]: RCFGBuilder took 543.56 ms. Allocated memory is still 201.9 MB. Free memory was 179.2 MB in the beginning and 162.4 MB in the end (delta: 16.9 MB). Peak memory consumption was 16.9 MB. Max. memory is 7.1 GB. [2020-07-20 14:16:30,495 INFO L168 Benchmark]: TraceAbstraction took 6633.14 ms. Allocated memory was 201.9 MB in the beginning and 244.3 MB in the end (delta: 42.5 MB). Free memory was 162.4 MB in the beginning and 130.3 MB in the end (delta: 32.1 MB). Peak memory consumption was 74.6 MB. Max. memory is 7.1 GB. [2020-07-20 14:16:30,499 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.61 ms. Allocated memory is still 145.8 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 276.39 ms. Allocated memory is still 145.8 MB. Free memory was 102.6 MB in the beginning and 92.3 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 130.41 ms. Allocated memory was 145.8 MB in the beginning and 201.9 MB in the end (delta: 56.1 MB). Free memory was 92.3 MB in the beginning and 179.9 MB in the end (delta: -87.6 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 543.56 ms. Allocated memory is still 201.9 MB. Free memory was 179.2 MB in the beginning and 162.4 MB in the end (delta: 16.9 MB). Peak memory consumption was 16.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6633.14 ms. Allocated memory was 201.9 MB in the beginning and 244.3 MB in the end (delta: 42.5 MB). Free memory was 162.4 MB in the beginning and 130.3 MB in the end (delta: 32.1 MB). Peak memory consumption was 74.6 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)=9, N=0] [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=2] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=2] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=2] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=2] [L25] int i; [L26] long long sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] sum[0] = 1 [L30] i=0 VAL [\old(N)=0, a={31892:0}, i=0, malloc(sizeof(int)*N)={31892:0}, N=2, sum={31894:0}] [L30] COND TRUE i