/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 NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/brs3f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 11:37:20,939 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 11:37:20,942 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 11:37:20,958 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 11:37:20,958 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 11:37:20,959 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 11:37:20,960 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 11:37:20,962 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 11:37:20,964 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 11:37:20,965 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 11:37:20,966 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 11:37:20,967 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 11:37:20,967 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 11:37:20,968 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 11:37:20,969 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 11:37:20,970 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 11:37:20,971 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 11:37:20,972 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 11:37:20,973 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 11:37:20,975 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 11:37:20,977 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 11:37:20,978 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 11:37:20,979 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 11:37:20,980 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 11:37:20,982 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 11:37:20,990 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 11:37:20,991 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 11:37:20,991 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 11:37:20,992 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 11:37:21,016 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 11:37:21,016 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 11:37:21,017 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 11:37:21,017 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 11:37:21,018 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 11:37:21,018 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 11:37:21,018 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 11:37:21,018 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 11:37:21,020 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 11:37:21,021 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 11:37:21,021 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 11:37:21,021 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 11:37:21,021 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 11:37:21,021 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 11:37:21,021 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 11:37:21,022 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 11:37:21,022 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 11:37:21,022 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 11:37:21,022 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 11:37:21,022 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 11:37:21,023 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 11:37:21,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:37:21,023 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 11:37:21,025 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 11:37:21,025 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 11:37:21,025 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 11:37:21,025 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:37:21,025 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 11:37:21,026 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 11:37:21,026 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 -> NOT_INCREMENTALLY [2020-07-21 11:37:21,303 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 11:37:21,320 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 11:37:21,323 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 11:37:21,325 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 11:37:21,327 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 11:37:21,328 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs3f.c [2020-07-21 11:37:21,408 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0784ab09/22ee28a06cb3408498b9eb0758795895/FLAG45c5fc4d4 [2020-07-21 11:37:21,881 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 11:37:21,881 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/brs3f.c [2020-07-21 11:37:21,888 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0784ab09/22ee28a06cb3408498b9eb0758795895/FLAG45c5fc4d4 [2020-07-21 11:37:22,262 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0784ab09/22ee28a06cb3408498b9eb0758795895 [2020-07-21 11:37:22,270 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 11:37:22,274 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 11:37:22,275 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 11:37:22,275 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 11:37:22,279 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 11:37:22,280 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:37:22" (1/1) ... [2020-07-21 11:37:22,283 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@81c6737 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:37:22, skipping insertion in model container [2020-07-21 11:37:22,284 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:37:22" (1/1) ... [2020-07-21 11:37:22,292 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 11:37:22,313 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 11:37:22,573 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:37:22,584 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 11:37:22,623 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:37:22,760 INFO L208 MainTranslator]: Completed translation [2020-07-21 11:37:22,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:37:22 WrapperNode [2020-07-21 11:37:22,761 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 11:37:22,763 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 11:37:22,763 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 11:37:22,763 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 11:37:22,779 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:37:22" (1/1) ... [2020-07-21 11:37:22,781 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:37:22" (1/1) ... [2020-07-21 11:37:22,791 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:37:22" (1/1) ... [2020-07-21 11:37:22,792 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:37:22" (1/1) ... [2020-07-21 11:37:22,815 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:37:22" (1/1) ... [2020-07-21 11:37:22,820 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:37:22" (1/1) ... [2020-07-21 11:37:22,828 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:37:22" (1/1) ... [2020-07-21 11:37:22,831 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 11:37:22,832 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 11:37:22,832 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 11:37:22,833 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 11:37:22,834 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:37:22" (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 11:37:22,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 11:37:22,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 11:37:22,895 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 11:37:22,895 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 11:37:22,895 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 11:37:22,895 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 11:37:22,895 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 11:37:22,896 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 11:37:22,896 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 11:37:22,896 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 11:37:22,897 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 11:37:22,897 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 11:37:22,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 11:37:22,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 11:37:22,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 11:37:22,899 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 11:37:22,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 11:37:22,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 11:37:22,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 11:37:23,233 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 11:37:23,233 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-21 11:37:23,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:37:23 BoogieIcfgContainer [2020-07-21 11:37:23,237 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 11:37:23,238 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 11:37:23,238 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 11:37:23,241 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 11:37:23,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:37:22" (1/3) ... [2020-07-21 11:37:23,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33199890 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:37:23, skipping insertion in model container [2020-07-21 11:37:23,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:37:22" (2/3) ... [2020-07-21 11:37:23,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33199890 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:37:23, skipping insertion in model container [2020-07-21 11:37:23,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:37:23" (3/3) ... [2020-07-21 11:37:23,245 INFO L109 eAbstractionObserver]: Analyzing ICFG brs3f.c [2020-07-21 11:37:23,255 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 11:37:23,260 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 11:37:23,275 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 11:37:23,297 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 11:37:23,297 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 11:37:23,297 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 11:37:23,297 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 11:37:23,298 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 11:37:23,298 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 11:37:23,298 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 11:37:23,298 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 11:37:23,313 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-21 11:37:23,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 11:37:23,318 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:37:23,319 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] [2020-07-21 11:37:23,319 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:37:23,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:37:23,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1824292310, now seen corresponding path program 1 times [2020-07-21 11:37:23,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:37:23,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438672359] [2020-07-21 11:37:23,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:37:23,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:37:23,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 11:37:23,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:37:23,489 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 11:37:23,489 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:37:23,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438672359] [2020-07-21 11:37:23,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:37:23,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 11:37:23,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914259976] [2020-07-21 11:37:23,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 11:37:23,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:37:23,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 11:37:23,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 11:37:23,515 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-07-21 11:37:23,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:37:23,542 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2020-07-21 11:37:23,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 11:37:23,544 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2020-07-21 11:37:23,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:37:23,552 INFO L225 Difference]: With dead ends: 56 [2020-07-21 11:37:23,553 INFO L226 Difference]: Without dead ends: 26 [2020-07-21 11:37:23,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 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 11:37:23,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-21 11:37:23,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-07-21 11:37:23,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 11:37:23,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-07-21 11:37:23,598 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 21 [2020-07-21 11:37:23,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:37:23,598 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-07-21 11:37:23,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 11:37:23,599 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-07-21 11:37:23,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 11:37:23,600 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:37:23,600 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] [2020-07-21 11:37:23,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:37:23,813 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:37:23,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:37:23,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1767537087, now seen corresponding path program 1 times [2020-07-21 11:37:23,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:37:23,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273597674] [2020-07-21 11:37:23,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:37:23,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:37:23,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:37:23,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:37:23,950 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 11:37:23,951 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:37:23,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273597674] [2020-07-21 11:37:23,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:37:23,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 11:37:23,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164565276] [2020-07-21 11:37:23,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 11:37:23,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:37:23,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 11:37:23,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 11:37:23,955 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 4 states. [2020-07-21 11:37:24,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:37:24,043 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2020-07-21 11:37:24,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 11:37:24,044 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-07-21 11:37:24,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:37:24,045 INFO L225 Difference]: With dead ends: 42 [2020-07-21 11:37:24,046 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 11:37:24,047 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 [2020-07-21 11:37:24,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 11:37:24,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2020-07-21 11:37:24,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-21 11:37:24,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-07-21 11:37:24,055 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 21 [2020-07-21 11:37:24,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:37:24,055 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-07-21 11:37:24,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 11:37:24,056 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-07-21 11:37:24,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 11:37:24,057 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:37:24,057 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] [2020-07-21 11:37:24,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:37:24,271 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:37:24,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:37:24,272 INFO L82 PathProgramCache]: Analyzing trace with hash -395878216, now seen corresponding path program 1 times [2020-07-21 11:37:24,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:37:24,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631190489] [2020-07-21 11:37:24,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:37:24,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:37:24,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 11:37:24,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:37:24,378 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 [2020-07-21 11:37:24,378 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:37:24,391 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:37:24,392 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:37:24,392 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-07-21 11:37:24,426 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-21 11:37:24,427 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:37:24,434 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:37:24,434 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:37:24,435 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:7 [2020-07-21 11:37:24,451 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:37:24,460 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:37:24,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 11:37:24,498 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:37:24,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631190489] [2020-07-21 11:37:24,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:37:24,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 11:37:24,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883194921] [2020-07-21 11:37:24,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 11:37:24,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:37:24,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 11:37:24,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 11:37:24,502 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 7 states. [2020-07-21 11:37:24,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:37:24,644 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-07-21 11:37:24,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 11:37:24,644 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-07-21 11:37:24,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:37:24,645 INFO L225 Difference]: With dead ends: 37 [2020-07-21 11:37:24,646 INFO L226 Difference]: Without dead ends: 31 [2020-07-21 11:37:24,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-07-21 11:37:24,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-21 11:37:24,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-07-21 11:37:24,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-21 11:37:24,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-07-21 11:37:24,653 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 27 [2020-07-21 11:37:24,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:37:24,653 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-07-21 11:37:24,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 11:37:24,653 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-07-21 11:37:24,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 11:37:24,654 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:37:24,655 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] [2020-07-21 11:37:24,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:37:24,869 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:37:24,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:37:24,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1205224842, now seen corresponding path program 1 times [2020-07-21 11:37:24,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:37:24,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967230485] [2020-07-21 11:37:24,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-21 11:37:24,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:37:24,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:37:24,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:37:24,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 11:37:24,923 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:37:24,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967230485] [2020-07-21 11:37:24,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:37:24,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:37:24,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603888172] [2020-07-21 11:37:24,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:37:24,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:37:24,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:37:24,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:37:24,926 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 3 states. [2020-07-21 11:37:24,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:37:24,957 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-07-21 11:37:24,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:37:24,958 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-07-21 11:37:24,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:37:24,959 INFO L225 Difference]: With dead ends: 48 [2020-07-21 11:37:24,959 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 11:37:24,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 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 11:37:24,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 11:37:24,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-07-21 11:37:24,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-21 11:37:24,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-07-21 11:37:24,966 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 27 [2020-07-21 11:37:24,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:37:24,967 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-07-21 11:37:24,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:37:24,967 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-07-21 11:37:24,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-21 11:37:24,968 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:37:24,968 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2020-07-21 11:37:25,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:37:25,169 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:37:25,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:37:25,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1239476407, now seen corresponding path program 1 times [2020-07-21 11:37:25,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:37:25,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [365903640] [2020-07-21 11:37:25,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:37:25,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:37:25,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 11:37:25,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:37:25,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:37:25,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:37:25,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:37:25,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [365903640] [2020-07-21 11:37:25,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:37:25,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-21 11:37:25,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336351995] [2020-07-21 11:37:25,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 11:37:25,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:37:25,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 11:37:25,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-21 11:37:25,336 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 9 states. [2020-07-21 11:37:25,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:37:25,477 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-07-21 11:37:25,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 11:37:25,477 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-07-21 11:37:25,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:37:25,478 INFO L225 Difference]: With dead ends: 54 [2020-07-21 11:37:25,478 INFO L226 Difference]: Without dead ends: 38 [2020-07-21 11:37:25,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-07-21 11:37:25,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-21 11:37:25,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2020-07-21 11:37:25,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 11:37:25,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-07-21 11:37:25,490 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 30 [2020-07-21 11:37:25,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:37:25,491 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-07-21 11:37:25,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 11:37:25,491 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-07-21 11:37:25,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-21 11:37:25,494 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:37:25,495 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2020-07-21 11:37:25,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:37:25,696 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:37:25,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:37:25,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1492634651, now seen corresponding path program 1 times [2020-07-21 11:37:25,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:37:25,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800412332] [2020-07-21 11:37:25,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:37:25,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:37:25,741 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:37:25,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:37:25,759 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:37:25,782 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 11:37:25,783 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 11:37:25,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:37:26,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:37:26 BoogieIcfgContainer [2020-07-21 11:37:26,033 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 11:37:26,035 INFO L168 Benchmark]: Toolchain (without parser) took 3763.38 ms. Allocated memory was 144.7 MB in the beginning and 235.4 MB in the end (delta: 90.7 MB). Free memory was 101.0 MB in the beginning and 130.4 MB in the end (delta: -29.4 MB). Peak memory consumption was 61.3 MB. Max. memory is 7.1 GB. [2020-07-21 11:37:26,036 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 144.7 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 11:37:26,037 INFO L168 Benchmark]: CACSL2BoogieTranslator took 486.59 ms. Allocated memory was 144.7 MB in the beginning and 203.4 MB in the end (delta: 58.7 MB). Free memory was 100.6 MB in the beginning and 182.4 MB in the end (delta: -81.9 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. [2020-07-21 11:37:26,038 INFO L168 Benchmark]: Boogie Preprocessor took 68.85 ms. Allocated memory is still 203.4 MB. Free memory was 182.4 MB in the beginning and 180.1 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-07-21 11:37:26,039 INFO L168 Benchmark]: RCFGBuilder took 404.73 ms. Allocated memory is still 203.4 MB. Free memory was 180.1 MB in the beginning and 163.5 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. [2020-07-21 11:37:26,039 INFO L168 Benchmark]: TraceAbstraction took 2795.36 ms. Allocated memory was 203.4 MB in the beginning and 235.4 MB in the end (delta: 32.0 MB). Free memory was 162.8 MB in the beginning and 130.4 MB in the end (delta: 32.4 MB). Peak memory consumption was 64.4 MB. Max. memory is 7.1 GB. [2020-07-21 11:37:26,044 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 144.7 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 486.59 ms. Allocated memory was 144.7 MB in the beginning and 203.4 MB in the end (delta: 58.7 MB). Free memory was 100.6 MB in the beginning and 182.4 MB in the end (delta: -81.9 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 68.85 ms. Allocated memory is still 203.4 MB. Free memory was 182.4 MB in the beginning and 180.1 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 404.73 ms. Allocated memory is still 203.4 MB. Free memory was 180.1 MB in the beginning and 163.5 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2795.36 ms. Allocated memory was 203.4 MB in the beginning and 235.4 MB in the end (delta: 32.0 MB). Free memory was 162.8 MB in the beginning and 130.4 MB in the end (delta: 32.4 MB). Peak memory consumption was 64.4 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)=7, 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] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=2, sum={2:0}] [L29] COND TRUE i