/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/s4iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 11:38:59,959 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 11:38:59,965 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 11:38:59,983 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 11:38:59,984 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 11:38:59,987 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 11:38:59,989 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 11:39:00,004 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 11:39:00,005 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 11:39:00,006 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 11:39:00,007 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 11:39:00,009 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 11:39:00,009 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 11:39:00,010 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 11:39:00,012 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 11:39:00,013 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 11:39:00,014 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 11:39:00,015 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 11:39:00,017 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 11:39:00,019 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 11:39:00,020 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 11:39:00,021 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 11:39:00,022 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 11:39:00,023 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 11:39:00,026 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 11:39:00,026 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 11:39:00,027 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 11:39:00,028 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 11:39:00,029 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 11:39:00,030 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 11:39:00,030 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 11:39:00,031 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 11:39:00,032 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 11:39:00,033 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 11:39:00,033 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 11:39:00,034 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 11:39:00,034 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 11:39:00,034 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 11:39:00,035 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 11:39:00,036 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 11:39:00,037 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 11:39:00,038 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 11:39:00,053 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 11:39:00,054 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 11:39:00,056 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 11:39:00,056 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 11:39:00,056 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 11:39:00,056 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 11:39:00,057 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 11:39:00,057 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 11:39:00,057 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 11:39:00,057 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 11:39:00,057 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 11:39:00,058 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 11:39:00,058 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 11:39:00,058 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 11:39:00,058 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 11:39:00,058 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 11:39:00,059 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 11:39:00,059 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 11:39:00,059 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 11:39:00,059 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 11:39:00,059 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 11:39:00,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:39:00,060 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 11:39:00,060 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 11:39:00,060 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 11:39:00,060 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 11:39:00,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:39:00,061 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 11:39:00,061 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 11:39:00,061 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 11:39:00,362 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 11:39:00,380 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 11:39:00,384 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 11:39:00,386 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 11:39:00,387 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 11:39:00,388 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s4iff.c [2020-07-21 11:39:00,487 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3770ffc8f/5a41fa1950744f8783ac85efeca44f91/FLAGf64927eb9 [2020-07-21 11:39:01,067 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 11:39:01,068 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s4iff.c [2020-07-21 11:39:01,076 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3770ffc8f/5a41fa1950744f8783ac85efeca44f91/FLAGf64927eb9 [2020-07-21 11:39:01,420 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3770ffc8f/5a41fa1950744f8783ac85efeca44f91 [2020-07-21 11:39:01,434 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 11:39:01,439 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 11:39:01,441 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 11:39:01,441 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 11:39:01,445 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 11:39:01,446 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:39:01" (1/1) ... [2020-07-21 11:39:01,449 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@646da8a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:01, skipping insertion in model container [2020-07-21 11:39:01,449 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:39:01" (1/1) ... [2020-07-21 11:39:01,458 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 11:39:01,482 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 11:39:01,687 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:39:01,698 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 11:39:01,725 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:39:01,744 INFO L208 MainTranslator]: Completed translation [2020-07-21 11:39:01,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:01 WrapperNode [2020-07-21 11:39:01,744 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 11:39:01,745 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 11:39:01,745 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 11:39:01,745 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 11:39:01,854 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:01" (1/1) ... [2020-07-21 11:39:01,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:01" (1/1) ... [2020-07-21 11:39:01,868 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:01" (1/1) ... [2020-07-21 11:39:01,868 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:01" (1/1) ... [2020-07-21 11:39:01,894 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:01" (1/1) ... [2020-07-21 11:39:01,900 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:01" (1/1) ... [2020-07-21 11:39:01,906 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:01" (1/1) ... [2020-07-21 11:39:01,908 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 11:39:01,909 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 11:39:01,909 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 11:39:01,912 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 11:39:01,914 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:01" (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 11:39:01,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 11:39:01,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 11:39:01,985 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 11:39:01,985 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 11:39:01,985 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 11:39:01,985 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 11:39:01,986 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 11:39:01,986 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 11:39:01,986 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 11:39:01,986 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 11:39:01,986 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 11:39:01,986 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 11:39:01,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 11:39:01,987 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 11:39:01,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 11:39:01,987 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 11:39:01,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 11:39:01,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 11:39:01,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 11:39:02,370 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 11:39:02,370 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-21 11:39:02,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:39:02 BoogieIcfgContainer [2020-07-21 11:39:02,378 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 11:39:02,380 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 11:39:02,380 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 11:39:02,385 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 11:39:02,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:39:01" (1/3) ... [2020-07-21 11:39:02,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f83eaf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:39:02, skipping insertion in model container [2020-07-21 11:39:02,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:01" (2/3) ... [2020-07-21 11:39:02,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f83eaf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:39:02, skipping insertion in model container [2020-07-21 11:39:02,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:39:02" (3/3) ... [2020-07-21 11:39:02,389 INFO L109 eAbstractionObserver]: Analyzing ICFG s4iff.c [2020-07-21 11:39:02,404 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 11:39:02,414 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 11:39:02,432 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 11:39:02,463 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 11:39:02,463 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 11:39:02,463 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 11:39:02,463 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 11:39:02,464 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 11:39:02,464 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 11:39:02,464 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 11:39:02,464 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 11:39:02,486 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-07-21 11:39:02,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 11:39:02,494 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:39:02,496 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 11:39:02,496 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:39:02,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:39:02,503 INFO L82 PathProgramCache]: Analyzing trace with hash -432131487, now seen corresponding path program 1 times [2020-07-21 11:39:02,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:39:02,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1694302771] [2020-07-21 11:39:02,514 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 11:39:02,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:39:02,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 11:39:02,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:39:02,661 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 11:39:02,662 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:39:02,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1694302771] [2020-07-21 11:39:02,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:39:02,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 11:39:02,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298849812] [2020-07-21 11:39:02,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 11:39:02,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:39:02,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 11:39:02,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 11:39:02,696 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-07-21 11:39:02,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:39:02,745 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2020-07-21 11:39:02,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 11:39:02,748 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2020-07-21 11:39:02,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:39:02,762 INFO L225 Difference]: With dead ends: 54 [2020-07-21 11:39:02,763 INFO L226 Difference]: Without dead ends: 25 [2020-07-21 11:39:02,768 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 11:39:02,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-21 11:39:02,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-21 11:39:02,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-21 11:39:02,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-07-21 11:39:02,816 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2020-07-21 11:39:02,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:39:02,816 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-07-21 11:39:02,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 11:39:02,817 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-07-21 11:39:02,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 11:39:02,818 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:39:02,819 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 11:39:03,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:39:03,034 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:39:03,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:39:03,035 INFO L82 PathProgramCache]: Analyzing trace with hash -173966049, now seen corresponding path program 1 times [2020-07-21 11:39:03,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:39:03,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171293193] [2020-07-21 11:39:03,037 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 11:39:03,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:39:03,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:39:03,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:39:03,198 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 11:39:03,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:39:03,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171293193] [2020-07-21 11:39:03,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:39:03,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 11:39:03,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388721307] [2020-07-21 11:39:03,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 11:39:03,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:39:03,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 11:39:03,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 11:39:03,207 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 4 states. [2020-07-21 11:39:03,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:39:03,316 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-07-21 11:39:03,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 11:39:03,317 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-07-21 11:39:03,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:39:03,318 INFO L225 Difference]: With dead ends: 40 [2020-07-21 11:39:03,318 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 11:39:03,320 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 11:39:03,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 11:39:03,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-07-21 11:39:03,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 11:39:03,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-07-21 11:39:03,329 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2020-07-21 11:39:03,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:39:03,330 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-07-21 11:39:03,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 11:39:03,330 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-07-21 11:39:03,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 11:39:03,331 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:39:03,332 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] [2020-07-21 11:39:03,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:39:03,547 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:39:03,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:39:03,548 INFO L82 PathProgramCache]: Analyzing trace with hash -445719797, now seen corresponding path program 1 times [2020-07-21 11:39:03,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:39:03,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189494753] [2020-07-21 11:39:03,550 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 11:39:03,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:39:03,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 11:39:03,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:39:03,698 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 11:39:03,699 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:39:03,714 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:39:03,715 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:39:03,715 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-07-21 11:39:03,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 11:39:03,759 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 [2020-07-21 11:39:03,761 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:39:03,775 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:39:03,776 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:39:03,777 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2020-07-21 11:39:04,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 11:39:04,012 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:39:04,012 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 [2020-07-21 11:39:04,014 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:39:04,061 INFO L624 ElimStorePlain]: treesize reduction 24, result has 65.7 percent of original size [2020-07-21 11:39:04,067 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. [2020-07-21 11:39:04,068 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:71, output treesize:46 [2020-07-21 11:39:04,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 11:39:04,160 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:39:04,161 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 [2020-07-21 11:39:04,162 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:39:04,174 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:39:04,175 INFO L544 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:39:04,176 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:53, output treesize:10 [2020-07-21 11:39:04,204 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 11:39:04,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:39:04,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:39:04,284 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:39:06,582 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-21 11:39:06,592 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:39:06,593 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 50 [2020-07-21 11:39:06,609 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-21 11:39:06,621 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-21 11:39:06,623 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 44 [2020-07-21 11:39:06,634 INFO L440 ElimStorePlain]: Different costs {0=[v_arrayElimCell_9], 1=[v_arrayElimCell_8]} [2020-07-21 11:39:06,640 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 4 [2020-07-21 11:39:06,640 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-21 11:39:06,649 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:39:06,655 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 79 treesize of output 67 [2020-07-21 11:39:06,656 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:39:06,657 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:39:06,659 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-21 11:39:06,672 INFO L624 ElimStorePlain]: treesize reduction 43, result has 10.4 percent of original size [2020-07-21 11:39:06,672 INFO L544 ElimStorePlain]: Start of recursive call 3: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:39:06,675 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:39:06,675 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:39:06,690 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:39:06,691 INFO L544 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:39:06,691 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:104, output treesize:9 [2020-07-21 11:39:06,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:39:06,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1189494753] [2020-07-21 11:39:06,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:39:06,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2020-07-21 11:39:06,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593723582] [2020-07-21 11:39:06,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 11:39:06,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:39:06,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 11:39:06,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=274, Unknown=2, NotChecked=0, Total=342 [2020-07-21 11:39:06,715 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 19 states. [2020-07-21 11:39:07,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:39:07,705 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-07-21 11:39:07,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 11:39:07,706 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 26 [2020-07-21 11:39:07,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:39:07,707 INFO L225 Difference]: With dead ends: 50 [2020-07-21 11:39:07,707 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 11:39:07,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=139, Invalid=561, Unknown=2, NotChecked=0, Total=702 [2020-07-21 11:39:07,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 11:39:07,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2020-07-21 11:39:07,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 11:39:07,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-07-21 11:39:07,716 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 26 [2020-07-21 11:39:07,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:39:07,716 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-07-21 11:39:07,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 11:39:07,716 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-07-21 11:39:07,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 11:39:07,718 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:39:07,718 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] [2020-07-21 11:39:07,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:39:07,929 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:39:07,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:39:07,930 INFO L82 PathProgramCache]: Analyzing trace with hash 531279049, now seen corresponding path program 2 times [2020-07-21 11:39:07,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:39:07,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1919313508] [2020-07-21 11:39:07,931 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 11:39:07,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:39:07,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 11:39:07,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:39:08,025 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:39:08,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:39:08,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:39:08,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1919313508] [2020-07-21 11:39:08,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:39:08,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-21 11:39:08,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124629240] [2020-07-21 11:39:08,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 11:39:08,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:39:08,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 11:39:08,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-21 11:39:08,075 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 9 states. [2020-07-21 11:39:08,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:39:08,249 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-07-21 11:39:08,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 11:39:08,250 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-07-21 11:39:08,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:39:08,251 INFO L225 Difference]: With dead ends: 45 [2020-07-21 11:39:08,252 INFO L226 Difference]: Without dead ends: 39 [2020-07-21 11:39:08,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-21 11:39:08,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-21 11:39:08,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2020-07-21 11:39:08,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 11:39:08,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-07-21 11:39:08,261 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 28 [2020-07-21 11:39:08,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:39:08,262 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-07-21 11:39:08,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 11:39:08,262 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-07-21 11:39:08,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-21 11:39:08,264 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:39:08,264 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] [2020-07-21 11:39:08,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:39:08,479 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:39:08,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:39:08,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1018004383, now seen corresponding path program 3 times [2020-07-21 11:39:08,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:39:08,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1713499863] [2020-07-21 11:39:08,481 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 11:39:08,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:39:08,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 11:39:08,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:39:08,619 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 11:39:08,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:39:08,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:39:08,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1713499863] [2020-07-21 11:39:08,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:39:08,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-21 11:39:08,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015756202] [2020-07-21 11:39:08,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 11:39:08,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:39:08,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 11:39:08,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-21 11:39:08,691 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 9 states. [2020-07-21 11:39:08,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:39:08,852 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2020-07-21 11:39:08,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 11:39:08,853 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-07-21 11:39:08,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:39:08,854 INFO L225 Difference]: With dead ends: 49 [2020-07-21 11:39:08,854 INFO L226 Difference]: Without dead ends: 35 [2020-07-21 11:39:08,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-07-21 11:39:08,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-21 11:39:08,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-07-21 11:39:08,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-21 11:39:08,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-07-21 11:39:08,862 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 29 [2020-07-21 11:39:08,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:39:08,862 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-07-21 11:39:08,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 11:39:08,863 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-07-21 11:39:08,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 11:39:08,864 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:39:08,864 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] [2020-07-21 11:39:09,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:39:09,078 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:39:09,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:39:09,079 INFO L82 PathProgramCache]: Analyzing trace with hash 2056219107, now seen corresponding path program 4 times [2020-07-21 11:39:09,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:39:09,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1783041170] [2020-07-21 11:39:09,081 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 11:39:09,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:39:09,123 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:39:09,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:39:09,142 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:39:09,168 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 11:39:09,168 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 11:39:09,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:39:09,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:39:09 BoogieIcfgContainer [2020-07-21 11:39:09,426 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 11:39:09,428 INFO L168 Benchmark]: Toolchain (without parser) took 7992.34 ms. Allocated memory was 138.4 MB in the beginning and 246.4 MB in the end (delta: 108.0 MB). Free memory was 102.1 MB in the beginning and 114.4 MB in the end (delta: -12.3 MB). Peak memory consumption was 95.7 MB. Max. memory is 7.1 GB. [2020-07-21 11:39:09,429 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 138.4 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-21 11:39:09,430 INFO L168 Benchmark]: CACSL2BoogieTranslator took 304.22 ms. Allocated memory is still 138.4 MB. Free memory was 101.7 MB in the beginning and 91.2 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-07-21 11:39:09,431 INFO L168 Benchmark]: Boogie Preprocessor took 163.42 ms. Allocated memory was 138.4 MB in the beginning and 203.4 MB in the end (delta: 65.0 MB). Free memory was 91.2 MB in the beginning and 180.9 MB in the end (delta: -89.7 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-21 11:39:09,432 INFO L168 Benchmark]: RCFGBuilder took 469.34 ms. Allocated memory is still 203.4 MB. Free memory was 180.9 MB in the beginning and 163.9 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 7.1 GB. [2020-07-21 11:39:09,433 INFO L168 Benchmark]: TraceAbstraction took 7046.94 ms. Allocated memory was 203.4 MB in the beginning and 246.4 MB in the end (delta: 43.0 MB). Free memory was 163.9 MB in the beginning and 114.4 MB in the end (delta: 49.5 MB). Peak memory consumption was 92.5 MB. Max. memory is 7.1 GB. [2020-07-21 11:39:09,437 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 138.4 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 304.22 ms. Allocated memory is still 138.4 MB. Free memory was 101.7 MB in the beginning and 91.2 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 163.42 ms. Allocated memory was 138.4 MB in the beginning and 203.4 MB in the end (delta: 65.0 MB). Free memory was 91.2 MB in the beginning and 180.9 MB in the end (delta: -89.7 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 469.34 ms. Allocated memory is still 203.4 MB. Free memory was 180.9 MB in the beginning and 163.9 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7046.94 ms. Allocated memory was 203.4 MB in the beginning and 246.4 MB in the end (delta: 43.0 MB). Free memory was 163.9 MB in the beginning and 114.4 MB in the end (delta: 49.5 MB). Peak memory consumption was 92.5 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] sum[0] = 1 [L30] i=0 VAL [\old(N)=0, a={8856:0}, i=0, malloc(sizeof(int)*N)={8856:0}, N=2, sum={8858:0}] [L30] COND TRUE i