/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --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 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/s4iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 23:38:44,964 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 23:38:44,966 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 23:38:44,978 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 23:38:44,978 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 23:38:44,979 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 23:38:44,981 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 23:38:44,983 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 23:38:44,984 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 23:38:44,985 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 23:38:44,986 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 23:38:44,987 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 23:38:44,987 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 23:38:44,988 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 23:38:44,989 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 23:38:44,990 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 23:38:44,991 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 23:38:44,992 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 23:38:44,994 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 23:38:44,997 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 23:38:45,001 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 23:38:45,003 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 23:38:45,004 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 23:38:45,005 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 23:38:45,010 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-19 23:38:45,011 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-19 23:38:45,011 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-19 23:38:45,012 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-19 23:38:45,012 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-19 23:38:45,013 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-19 23:38:45,014 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-19 23:38:45,016 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-19 23:38:45,016 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-19 23:38:45,019 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-19 23:38:45,021 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-19 23:38:45,022 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-19 23:38:45,023 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-19 23:38:45,024 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-19 23:38:45,024 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 23:38:45,025 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 23:38:45,026 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 23:38:45,027 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 [2020-07-19 23:38:45,049 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 23:38:45,049 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 23:38:45,051 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 23:38:45,051 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 23:38:45,051 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 23:38:45,052 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 23:38:45,052 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 23:38:45,052 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 23:38:45,052 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 23:38:45,053 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 23:38:45,054 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 23:38:45,054 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 23:38:45,054 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 23:38:45,054 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 23:38:45,055 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 23:38:45,055 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 23:38:45,055 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 23:38:45,055 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 23:38:45,055 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 23:38:45,056 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 23:38:45,056 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 23:38:45,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 23:38:45,056 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 23:38:45,056 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 23:38:45,057 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 23:38:45,057 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 23:38:45,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 23:38:45,057 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 23:38:45,057 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 23:38:45,057 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-19 23:38:45,404 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 23:38:45,416 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 23:38:45,420 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 23:38:45,421 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 23:38:45,421 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 23:38:45,422 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s4iff.c [2020-07-19 23:38:45,491 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3c3cae8f/b9fc733c9d3845409753ab1040559b33/FLAGc63ecf95b [2020-07-19 23:38:45,925 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 23:38:45,926 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s4iff.c [2020-07-19 23:38:45,932 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3c3cae8f/b9fc733c9d3845409753ab1040559b33/FLAGc63ecf95b [2020-07-19 23:38:46,308 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3c3cae8f/b9fc733c9d3845409753ab1040559b33 [2020-07-19 23:38:46,316 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 23:38:46,319 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 23:38:46,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 23:38:46,320 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 23:38:46,323 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 23:38:46,324 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:38:46" (1/1) ... [2020-07-19 23:38:46,327 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@462e5efa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:38:46, skipping insertion in model container [2020-07-19 23:38:46,327 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:38:46" (1/1) ... [2020-07-19 23:38:46,335 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 23:38:46,353 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 23:38:46,598 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:38:46,608 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 23:38:46,646 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:38:46,666 INFO L208 MainTranslator]: Completed translation [2020-07-19 23:38:46,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:38:46 WrapperNode [2020-07-19 23:38:46,668 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 23:38:46,668 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 23:38:46,668 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 23:38:46,669 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 23:38:46,785 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:38:46" (1/1) ... [2020-07-19 23:38:46,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:38:46" (1/1) ... [2020-07-19 23:38:46,795 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:38:46" (1/1) ... [2020-07-19 23:38:46,796 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:38:46" (1/1) ... [2020-07-19 23:38:46,804 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:38:46" (1/1) ... [2020-07-19 23:38:46,809 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:38:46" (1/1) ... [2020-07-19 23:38:46,810 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:38:46" (1/1) ... [2020-07-19 23:38:46,812 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 23:38:46,813 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 23:38:46,813 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 23:38:46,813 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 23:38:46,814 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:38:46" (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 [2020-07-19 23:38:46,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 23:38:46,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 23:38:46,886 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-19 23:38:46,886 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-19 23:38:46,886 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 23:38:46,887 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 23:38:46,887 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-19 23:38:46,888 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-19 23:38:46,888 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-19 23:38:46,888 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-19 23:38:46,888 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-19 23:38:46,889 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 23:38:46,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-19 23:38:46,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-19 23:38:46,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-19 23:38:46,890 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-19 23:38:46,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-19 23:38:46,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 23:38:46,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 23:38:47,151 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 23:38:47,151 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-19 23:38:47,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:38:47 BoogieIcfgContainer [2020-07-19 23:38:47,155 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 23:38:47,156 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 23:38:47,157 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 23:38:47,160 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 23:38:47,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 11:38:46" (1/3) ... [2020-07-19 23:38:47,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a28120c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:38:47, skipping insertion in model container [2020-07-19 23:38:47,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:38:46" (2/3) ... [2020-07-19 23:38:47,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a28120c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:38:47, skipping insertion in model container [2020-07-19 23:38:47,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:38:47" (3/3) ... [2020-07-19 23:38:47,163 INFO L109 eAbstractionObserver]: Analyzing ICFG s4iff.c [2020-07-19 23:38:47,173 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 23:38:47,180 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 23:38:47,209 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 23:38:47,241 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 23:38:47,242 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 23:38:47,242 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 23:38:47,242 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 23:38:47,242 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 23:38:47,242 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 23:38:47,242 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 23:38:47,243 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 23:38:47,259 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-07-19 23:38:47,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-19 23:38:47,265 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:38:47,266 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] [2020-07-19 23:38:47,267 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:38:47,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:38:47,273 INFO L82 PathProgramCache]: Analyzing trace with hash -432131487, now seen corresponding path program 1 times [2020-07-19 23:38:47,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:38:47,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013797184] [2020-07-19 23:38:47,283 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4a688a71 [2020-07-19 23:38:47,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:38:47,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:38:47,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:38:47,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:38:47,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013797184] [2020-07-19 23:38:47,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:38:47,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 23:38:47,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132928539] [2020-07-19 23:38:47,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 23:38:47,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:38:47,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 23:38:47,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 23:38:47,502 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-07-19 23:38:47,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:38:47,601 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2020-07-19 23:38:47,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 23:38:47,604 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-19 23:38:47,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:38:47,615 INFO L225 Difference]: With dead ends: 54 [2020-07-19 23:38:47,616 INFO L226 Difference]: Without dead ends: 25 [2020-07-19 23:38:47,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 23:38:47,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-19 23:38:47,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-19 23:38:47,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-19 23:38:47,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-07-19 23:38:47,668 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2020-07-19 23:38:47,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:38:47,668 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-07-19 23:38:47,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 23:38:47,669 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-07-19 23:38:47,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-19 23:38:47,671 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:38:47,671 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] [2020-07-19 23:38:47,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 23:38:47,672 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:38:47,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:38:47,673 INFO L82 PathProgramCache]: Analyzing trace with hash -173966049, now seen corresponding path program 1 times [2020-07-19 23:38:47,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:38:47,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059040923] [2020-07-19 23:38:47,674 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4a688a71 [2020-07-19 23:38:47,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:38:47,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:38:47,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:38:47,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:38:47,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059040923] [2020-07-19 23:38:47,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:38:47,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 23:38:47,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785132278] [2020-07-19 23:38:47,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 23:38:47,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:38:47,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 23:38:47,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-19 23:38:47,796 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 5 states. [2020-07-19 23:38:47,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:38:47,914 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-07-19 23:38:47,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-19 23:38:47,915 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-07-19 23:38:47,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:38:47,916 INFO L225 Difference]: With dead ends: 40 [2020-07-19 23:38:47,916 INFO L226 Difference]: Without dead ends: 30 [2020-07-19 23:38:47,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-19 23:38:47,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-19 23:38:47,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-07-19 23:38:47,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-19 23:38:47,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-07-19 23:38:47,926 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2020-07-19 23:38:47,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:38:47,926 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-07-19 23:38:47,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 23:38:47,927 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-07-19 23:38:47,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-19 23:38:47,928 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:38:47,928 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] [2020-07-19 23:38:47,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-19 23:38:47,929 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:38:47,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:38:47,929 INFO L82 PathProgramCache]: Analyzing trace with hash -445719797, now seen corresponding path program 1 times [2020-07-19 23:38:47,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:38:47,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956795902] [2020-07-19 23:38:47,930 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4a688a71 [2020-07-19 23:38:47,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:38:48,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:38:48,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:38:48,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:38:48,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956795902] [2020-07-19 23:38:48,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028611532] [2020-07-19 23:38:48,412 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@58d7f03d No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:38:48,495 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@58d7f03d issued 4 check-sat command(s) [2020-07-19 23:38:48,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:38:48,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-19 23:38:48,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:38:48,611 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 [2020-07-19 23:38:48,612 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-19 23:38:48,628 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 23:38:48,629 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-19 23:38:48,629 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-07-19 23:38:48,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-19 23:38:48,674 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 [2020-07-19 23:38:48,675 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-19 23:38:48,687 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 23:38:48,688 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-19 23:38:48,688 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2020-07-19 23:38:48,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-19 23:38:48,904 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 23:38:48,905 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 [2020-07-19 23:38:48,906 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-19 23:38:48,943 INFO L624 ElimStorePlain]: treesize reduction 24, result has 65.7 percent of original size [2020-07-19 23:38:48,949 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-07-19 23:38:48,949 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:71, output treesize:46 [2020-07-19 23:38:49,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-19 23:38:49,035 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 23:38:49,036 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 37 treesize of output 29 [2020-07-19 23:38:49,037 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-19 23:38:49,048 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 23:38:49,049 INFO L544 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-19 23:38:49,049 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:53, output treesize:10 [2020-07-19 23:38:49,082 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-19 23:38:49,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:38:49,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:38:49,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-07-19 23:38:49,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139694198] [2020-07-19 23:38:49,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-19 23:38:49,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:38:49,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-19 23:38:49,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2020-07-19 23:38:49,156 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 21 states. [2020-07-19 23:38:49,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:38:49,916 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2020-07-19 23:38:49,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-19 23:38:49,916 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 26 [2020-07-19 23:38:49,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:38:49,919 INFO L225 Difference]: With dead ends: 49 [2020-07-19 23:38:49,919 INFO L226 Difference]: Without dead ends: 36 [2020-07-19 23:38:49,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2020-07-19 23:38:49,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-19 23:38:49,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-07-19 23:38:49,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-19 23:38:49,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-07-19 23:38:49,936 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 26 [2020-07-19 23:38:49,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:38:49,936 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-07-19 23:38:49,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-19 23:38:49,936 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-07-19 23:38:49,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-19 23:38:49,938 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:38:49,938 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] [2020-07-19 23:38:50,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-19 23:38:50,152 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:38:50,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:38:50,153 INFO L82 PathProgramCache]: Analyzing trace with hash 531279049, now seen corresponding path program 2 times [2020-07-19 23:38:50,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:38:50,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144192242] [2020-07-19 23:38:50,155 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4a688a71 [2020-07-19 23:38:50,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:38:50,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:38:50,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:38:50,234 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:38:50,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144192242] [2020-07-19 23:38:50,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486708982] [2020-07-19 23:38:50,235 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7034e4d No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:38:50,311 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7034e4d issued 4 check-sat command(s) [2020-07-19 23:38:50,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:38:50,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-19 23:38:50,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:38:50,358 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:38:50,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:38:50,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-07-19 23:38:50,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159087575] [2020-07-19 23:38:50,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-19 23:38:50,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:38:50,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-19 23:38:50,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-19 23:38:50,360 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 11 states. [2020-07-19 23:38:50,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:38:50,603 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-07-19 23:38:50,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-19 23:38:50,603 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-07-19 23:38:50,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:38:50,605 INFO L225 Difference]: With dead ends: 45 [2020-07-19 23:38:50,605 INFO L226 Difference]: Without dead ends: 39 [2020-07-19 23:38:50,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-07-19 23:38:50,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-19 23:38:50,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2020-07-19 23:38:50,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-19 23:38:50,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-07-19 23:38:50,613 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 28 [2020-07-19 23:38:50,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:38:50,614 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-07-19 23:38:50,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-19 23:38:50,614 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-07-19 23:38:50,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-19 23:38:50,615 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:38:50,615 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] [2020-07-19 23:38:50,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:38:50,829 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:38:50,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:38:50,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1018004383, now seen corresponding path program 3 times [2020-07-19 23:38:50,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:38:50,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349508251] [2020-07-19 23:38:50,832 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4a688a71 [2020-07-19 23:38:50,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:38:50,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:38:50,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:38:50,920 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:38:50,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349508251] [2020-07-19 23:38:50,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50742552] [2020-07-19 23:38:50,921 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@101b5cad No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:38:50,975 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@101b5cad issued 4 check-sat command(s) [2020-07-19 23:38:50,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:38:50,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-19 23:38:50,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:38:51,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:38:51,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:38:51,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-07-19 23:38:51,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860608153] [2020-07-19 23:38:51,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-19 23:38:51,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:38:51,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-19 23:38:51,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-07-19 23:38:51,025 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 11 states. [2020-07-19 23:38:51,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:38:51,194 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2020-07-19 23:38:51,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-19 23:38:51,195 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-07-19 23:38:51,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:38:51,195 INFO L225 Difference]: With dead ends: 49 [2020-07-19 23:38:51,196 INFO L226 Difference]: Without dead ends: 35 [2020-07-19 23:38:51,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-07-19 23:38:51,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-19 23:38:51,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-07-19 23:38:51,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-19 23:38:51,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-07-19 23:38:51,203 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 29 [2020-07-19 23:38:51,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:38:51,204 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-07-19 23:38:51,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-19 23:38:51,204 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-07-19 23:38:51,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-19 23:38:51,205 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:38:51,205 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] [2020-07-19 23:38:51,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:38:51,418 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:38:51,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:38:51,418 INFO L82 PathProgramCache]: Analyzing trace with hash 2056219107, now seen corresponding path program 4 times [2020-07-19 23:38:51,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:38:51,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933790716] [2020-07-19 23:38:51,419 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4a688a71 [2020-07-19 23:38:51,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-19 23:38:51,438 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-19 23:38:51,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-19 23:38:51,454 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-19 23:38:51,475 INFO L174 FreeRefinementEngine]: Strategy CAMEL_SMT_AM found a feasible trace [2020-07-19 23:38:51,476 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-19 23:38:51,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-19 23:38:51,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 11:38:51 BoogieIcfgContainer [2020-07-19 23:38:51,520 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-19 23:38:51,522 INFO L168 Benchmark]: Toolchain (without parser) took 5204.22 ms. Allocated memory was 140.5 MB in the beginning and 243.3 MB in the end (delta: 102.8 MB). Free memory was 105.2 MB in the beginning and 147.5 MB in the end (delta: -42.3 MB). Peak memory consumption was 60.4 MB. Max. memory is 7.1 GB. [2020-07-19 23:38:51,523 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 140.5 MB. Free memory was 123.5 MB in the beginning and 123.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-19 23:38:51,523 INFO L168 Benchmark]: CACSL2BoogieTranslator took 348.35 ms. Allocated memory is still 140.5 MB. Free memory was 104.8 MB in the beginning and 94.5 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-19 23:38:51,524 INFO L168 Benchmark]: Boogie Preprocessor took 144.19 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 94.3 MB in the beginning and 182.1 MB in the end (delta: -87.9 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2020-07-19 23:38:51,525 INFO L168 Benchmark]: RCFGBuilder took 342.55 ms. Allocated memory is still 203.9 MB. Free memory was 181.5 MB in the beginning and 164.6 MB in the end (delta: 16.9 MB). Peak memory consumption was 16.9 MB. Max. memory is 7.1 GB. [2020-07-19 23:38:51,526 INFO L168 Benchmark]: TraceAbstraction took 4363.71 ms. Allocated memory was 203.9 MB in the beginning and 243.3 MB in the end (delta: 39.3 MB). Free memory was 164.6 MB in the beginning and 147.5 MB in the end (delta: 17.1 MB). Peak memory consumption was 56.4 MB. Max. memory is 7.1 GB. [2020-07-19 23:38:51,530 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 140.5 MB. Free memory was 123.5 MB in the beginning and 123.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 348.35 ms. Allocated memory is still 140.5 MB. Free memory was 104.8 MB in the beginning and 94.5 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 144.19 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 94.3 MB in the beginning and 182.1 MB in the end (delta: -87.9 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 342.55 ms. Allocated memory is still 203.9 MB. Free memory was 181.5 MB in the beginning and 164.6 MB in the end (delta: 16.9 MB). Peak memory consumption was 16.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4363.71 ms. Allocated memory was 203.9 MB in the beginning and 243.3 MB in the end (delta: 39.3 MB). Free memory was 164.6 MB in the beginning and 147.5 MB in the end (delta: 17.1 MB). Peak memory consumption was 56.4 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)=12, 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={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=2, sum={2:0}] [L30] COND TRUE i