/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/s1iff.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:44:29,918 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:44:29,921 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:44:29,960 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:44:29,961 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:44:29,962 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:44:29,964 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:44:29,967 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:44:29,970 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:44:29,971 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:44:29,973 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:44:29,974 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:44:29,975 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:44:29,976 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:44:29,978 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:44:29,980 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:44:29,981 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:44:29,982 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:44:29,999 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:44:30,001 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:44:30,007 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:44:30,009 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:44:30,010 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:44:30,012 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:44:30,015 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-06 22:44:30,015 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-06 22:44:30,016 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-06 22:44:30,017 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-06 22:44:30,018 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-06 22:44:30,019 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-06 22:44:30,019 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-06 22:44:30,023 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-06 22:44:30,025 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-06 22:44:30,026 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-06 22:44:30,027 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-06 22:44:30,028 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-06 22:44:30,028 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-06 22:44:30,029 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-06 22:44:30,029 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:44:30,030 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:44:30,031 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:44:30,035 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 [2020-11-06 22:44:30,069 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:44:30,070 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:44:30,072 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:44:30,072 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:44:30,072 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:44:30,073 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:44:30,073 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:44:30,073 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:44:30,074 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:44:30,074 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:44:30,074 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:44:30,074 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:44:30,075 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:44:30,075 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:44:30,075 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:44:30,076 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:44:30,076 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:44:30,076 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:44:30,077 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:44:30,077 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:44:30,077 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:44:30,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:44:30,078 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:44:30,078 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:44:30,078 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:44:30,079 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:44:30,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:44:30,079 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:44:30,080 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:44:30,080 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:44:30,476 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:44:30,508 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:44:30,511 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:44:30,513 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:44:30,514 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:44:30,515 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s1iff.c [2020-11-06 22:44:30,617 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4da8a988b/eaeef35964a84d54beb6070955146c83/FLAGfd3a00f60 [2020-11-06 22:44:31,249 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:44:31,250 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s1iff.c [2020-11-06 22:44:31,257 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4da8a988b/eaeef35964a84d54beb6070955146c83/FLAGfd3a00f60 [2020-11-06 22:44:31,619 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4da8a988b/eaeef35964a84d54beb6070955146c83 [2020-11-06 22:44:31,622 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:44:31,631 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:44:31,633 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:44:31,633 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:44:31,637 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:44:31,638 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:44:31" (1/1) ... [2020-11-06 22:44:31,642 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6250755c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:31, skipping insertion in model container [2020-11-06 22:44:31,642 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:44:31" (1/1) ... [2020-11-06 22:44:31,651 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:44:31,667 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:44:31,850 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:44:31,861 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:44:31,887 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:44:31,906 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:44:31,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:31 WrapperNode [2020-11-06 22:44:31,907 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:44:31,908 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:44:31,908 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:44:31,909 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:44:31,924 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:31" (1/1) ... [2020-11-06 22:44:31,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:31" (1/1) ... [2020-11-06 22:44:31,934 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:31" (1/1) ... [2020-11-06 22:44:31,934 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:31" (1/1) ... [2020-11-06 22:44:31,944 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:31" (1/1) ... [2020-11-06 22:44:31,950 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:31" (1/1) ... [2020-11-06 22:44:31,952 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:31" (1/1) ... [2020-11-06 22:44:31,954 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:44:31,956 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:44:31,956 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:44:31,956 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:44:31,957 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:31" (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 [2020-11-06 22:44:32,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:44:32,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:44:32,051 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:44:32,051 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-06 22:44:32,052 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-06 22:44:32,052 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:44:32,052 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:44:32,052 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:44:32,052 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:44:32,053 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:44:32,053 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-06 22:44:32,053 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-06 22:44:32,053 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 22:44:32,053 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-06 22:44:32,054 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:44:32,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-06 22:44:32,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:44:32,054 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:44:32,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:44:32,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:44:32,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:44:32,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:44:32,452 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:44:32,452 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-11-06 22:44:32,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:44:32 BoogieIcfgContainer [2020-11-06 22:44:32,454 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:44:32,456 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:44:32,456 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:44:32,460 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:44:32,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:44:31" (1/3) ... [2020-11-06 22:44:32,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f5ecf64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:44:32, skipping insertion in model container [2020-11-06 22:44:32,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:31" (2/3) ... [2020-11-06 22:44:32,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f5ecf64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:44:32, skipping insertion in model container [2020-11-06 22:44:32,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:44:32" (3/3) ... [2020-11-06 22:44:32,464 INFO L111 eAbstractionObserver]: Analyzing ICFG s1iff.c [2020-11-06 22:44:32,481 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:44:32,485 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:44:32,498 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:44:32,529 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:44:32,529 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:44:32,530 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:44:32,530 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:44:32,530 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:44:32,530 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:44:32,530 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:44:32,530 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:44:32,549 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-11-06 22:44:32,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-06 22:44:32,556 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:44:32,557 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] [2020-11-06 22:44:32,558 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:44:32,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:44:32,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1361575079, now seen corresponding path program 1 times [2020-11-06 22:44:32,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:44:32,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030436958] [2020-11-06 22:44:32,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:44:32,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:32,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:44:32,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:32,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-06 22:44:32,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:32,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:44:32,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030436958] [2020-11-06 22:44:32,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:44:32,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-06 22:44:32,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191167647] [2020-11-06 22:44:32,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-06 22:44:32,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:44:32,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-06 22:44:32,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:44:32,963 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-11-06 22:44:33,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:44:33,135 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2020-11-06 22:44:33,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-06 22:44:33,137 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-11-06 22:44:33,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:44:33,146 INFO L225 Difference]: With dead ends: 59 [2020-11-06 22:44:33,147 INFO L226 Difference]: Without dead ends: 26 [2020-11-06 22:44:33,151 INFO L677 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 [2020-11-06 22:44:33,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-06 22:44:33,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-11-06 22:44:33,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-06 22:44:33,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-11-06 22:44:33,199 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 22 [2020-11-06 22:44:33,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:44:33,200 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-11-06 22:44:33,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-06 22:44:33,200 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-11-06 22:44:33,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-06 22:44:33,201 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:44:33,201 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] [2020-11-06 22:44:33,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:44:33,202 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:44:33,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:44:33,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1173980304, now seen corresponding path program 1 times [2020-11-06 22:44:33,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:44:33,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446519985] [2020-11-06 22:44:33,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:44:33,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:33,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:44:33,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:33,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-06 22:44:33,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:33,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:44:33,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446519985] [2020-11-06 22:44:33,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:44:33,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 22:44:33,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677250743] [2020-11-06 22:44:33,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 22:44:33,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:44:33,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 22:44:33,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:44:33,453 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 5 states. [2020-11-06 22:44:33,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:44:33,752 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2020-11-06 22:44:33,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:44:33,753 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-11-06 22:44:33,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:44:33,754 INFO L225 Difference]: With dead ends: 42 [2020-11-06 22:44:33,755 INFO L226 Difference]: Without dead ends: 31 [2020-11-06 22:44:33,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:44:33,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-06 22:44:33,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-11-06 22:44:33,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-06 22:44:33,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-11-06 22:44:33,771 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2020-11-06 22:44:33,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:44:33,771 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-11-06 22:44:33,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 22:44:33,772 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-11-06 22:44:33,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-06 22:44:33,775 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:44:33,775 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:44:33,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 22:44:33,776 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:44:33,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:44:33,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1619095335, now seen corresponding path program 1 times [2020-11-06 22:44:33,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:44:33,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410584568] [2020-11-06 22:44:33,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:44:33,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:34,295 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-11-06 22:44:34,438 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2020-11-06 22:44:34,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:44:34,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:34,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-06 22:44:34,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:34,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:44:34,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410584568] [2020-11-06 22:44:34,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645029177] [2020-11-06 22:44:34,645 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 -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 [2020-11-06 22:44:34,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:34,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-06 22:44:34,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:44:34,890 INFO L382 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 [2020-11-06 22:44:34,890 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:44:34,906 INFO L382 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 [2020-11-06 22:44:34,906 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-06 22:44:34,956 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:44:34,956 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-11-06 22:44:34,957 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:49, output treesize:41 [2020-11-06 22:44:35,046 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:44:35,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:35,077 INFO L382 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 [2020-11-06 22:44:35,078 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:44:35,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:35,094 INFO L382 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 [2020-11-06 22:44:35,095 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-06 22:44:35,146 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:44:35,147 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-11-06 22:44:35,147 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:71, output treesize:63 [2020-11-06 22:44:35,226 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:44:35,324 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:44:35,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:35,569 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:44:35,569 INFO L382 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 [2020-11-06 22:44:35,571 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:44:35,625 INFO L625 ElimStorePlain]: treesize reduction 24, result has 70.7 percent of original size [2020-11-06 22:44:35,640 INFO L547 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. [2020-11-06 22:44:35,640 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:73, output treesize:58 [2020-11-06 22:44:35,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:35,858 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:44:35,859 INFO L382 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 47 treesize of output 31 [2020-11-06 22:44:35,861 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:44:35,874 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:44:35,877 INFO L547 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-06 22:44:35,878 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:65, output treesize:12 [2020-11-06 22:44:35,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:44:35,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:44:35,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-11-06 22:44:35,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969957450] [2020-11-06 22:44:35,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-06 22:44:35,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:44:35,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-06 22:44:35,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2020-11-06 22:44:35,962 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 20 states. [2020-11-06 22:44:36,370 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2020-11-06 22:44:37,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:44:37,078 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2020-11-06 22:44:37,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-06 22:44:37,081 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2020-11-06 22:44:37,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:44:37,086 INFO L225 Difference]: With dead ends: 51 [2020-11-06 22:44:37,086 INFO L226 Difference]: Without dead ends: 37 [2020-11-06 22:44:37,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2020-11-06 22:44:37,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-06 22:44:37,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-11-06 22:44:37,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-06 22:44:37,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-11-06 22:44:37,108 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 27 [2020-11-06 22:44:37,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:44:37,109 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-11-06 22:44:37,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-06 22:44:37,109 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-11-06 22:44:37,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-06 22:44:37,111 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:44:37,112 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:44:37,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-06 22:44:37,326 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:44:37,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:44:37,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1138583351, now seen corresponding path program 2 times [2020-11-06 22:44:37,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:44:37,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362028587] [2020-11-06 22:44:37,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:44:37,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:37,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:44:37,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:37,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-06 22:44:37,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:37,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:44:37,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362028587] [2020-11-06 22:44:37,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134225523] [2020-11-06 22:44:37,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-11-06 22:44:37,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:44:37,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:44:37,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-06 22:44:37,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:44:37,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:44:37,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:44:37,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-11-06 22:44:37,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161571964] [2020-11-06 22:44:37,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-06 22:44:37,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:44:37,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-06 22:44:37,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-11-06 22:44:37,669 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 11 states. [2020-11-06 22:44:37,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:44:37,973 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2020-11-06 22:44:37,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-06 22:44:37,973 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-11-06 22:44:37,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:44:37,975 INFO L225 Difference]: With dead ends: 47 [2020-11-06 22:44:37,975 INFO L226 Difference]: Without dead ends: 40 [2020-11-06 22:44:37,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-11-06 22:44:37,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-06 22:44:37,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2020-11-06 22:44:37,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-06 22:44:37,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-11-06 22:44:37,985 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 29 [2020-11-06 22:44:37,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:44:37,986 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-11-06 22:44:37,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-06 22:44:37,986 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-11-06 22:44:37,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-06 22:44:37,987 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:44:37,987 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, 1] [2020-11-06 22:44:38,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:44:38,201 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:44:38,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:44:38,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1887781106, now seen corresponding path program 3 times [2020-11-06 22:44:38,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:44:38,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329742457] [2020-11-06 22:44:38,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:44:38,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:38,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:44:38,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:38,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-06 22:44:38,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:38,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:44:38,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329742457] [2020-11-06 22:44:38,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145376225] [2020-11-06 22:44:38,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-11-06 22:44:38,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-06 22:44:38,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:44:38,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-06 22:44:38,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:44:38,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:44:38,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:44:38,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-11-06 22:44:38,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871820185] [2020-11-06 22:44:38,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-06 22:44:38,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:44:38,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-06 22:44:38,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-11-06 22:44:38,505 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 11 states. [2020-11-06 22:44:38,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:44:38,765 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2020-11-06 22:44:38,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-06 22:44:38,767 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-11-06 22:44:38,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:44:38,769 INFO L225 Difference]: With dead ends: 51 [2020-11-06 22:44:38,769 INFO L226 Difference]: Without dead ends: 36 [2020-11-06 22:44:38,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-11-06 22:44:38,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-06 22:44:38,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-11-06 22:44:38,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-06 22:44:38,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-11-06 22:44:38,787 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 30 [2020-11-06 22:44:38,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:44:38,787 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-11-06 22:44:38,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-06 22:44:38,788 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-11-06 22:44:38,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-06 22:44:38,789 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:44:38,789 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, 1] [2020-11-06 22:44:38,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:44:38,990 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:44:38,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:44:38,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1759077844, now seen corresponding path program 4 times [2020-11-06 22:44:38,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:44:38,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173551229] [2020-11-06 22:44:38,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:44:39,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:44:39,024 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:44:39,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:44:39,071 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:44:39,099 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-06 22:44:39,100 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-06 22:44:39,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-06 22:44:39,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:44:39 BoogieIcfgContainer [2020-11-06 22:44:39,150 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:44:39,151 INFO L168 Benchmark]: Toolchain (without parser) took 7526.66 ms. Allocated memory was 152.0 MB in the beginning and 189.8 MB in the end (delta: 37.7 MB). Free memory was 127.5 MB in the beginning and 84.0 MB in the end (delta: 43.5 MB). Peak memory consumption was 81.8 MB. Max. memory is 8.0 GB. [2020-11-06 22:44:39,152 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 152.0 MB. Free memory is still 124.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:44:39,153 INFO L168 Benchmark]: CACSL2BoogieTranslator took 274.68 ms. Allocated memory is still 152.0 MB. Free memory was 127.0 MB in the beginning and 117.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-11-06 22:44:39,153 INFO L168 Benchmark]: Boogie Preprocessor took 46.41 ms. Allocated memory is still 152.0 MB. Free memory was 117.1 MB in the beginning and 115.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:44:39,154 INFO L168 Benchmark]: RCFGBuilder took 498.89 ms. Allocated memory is still 152.0 MB. Free memory was 115.5 MB in the beginning and 130.6 MB in the end (delta: -15.2 MB). Peak memory consumption was 15.3 MB. Max. memory is 8.0 GB. [2020-11-06 22:44:39,155 INFO L168 Benchmark]: TraceAbstraction took 6693.79 ms. Allocated memory was 152.0 MB in the beginning and 189.8 MB in the end (delta: 37.7 MB). Free memory was 130.6 MB in the beginning and 84.0 MB in the end (delta: 46.7 MB). Peak memory consumption was 84.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:44:39,159 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 152.0 MB. Free memory is still 124.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 274.68 ms. Allocated memory is still 152.0 MB. Free memory was 127.0 MB in the beginning and 117.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 46.41 ms. Allocated memory is still 152.0 MB. Free memory was 117.1 MB in the beginning and 115.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 498.89 ms. Allocated memory is still 152.0 MB. Free memory was 115.5 MB in the beginning and 130.6 MB in the end (delta: -15.2 MB). Peak memory consumption was 15.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6693.79 ms. Allocated memory was 152.0 MB in the beginning and 189.8 MB in the end (delta: 37.7 MB). Free memory was 130.6 MB in the beginning and 84.0 MB in the end (delta: 46.7 MB). Peak memory consumption was 84.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L19] int N; VAL [\old(N)=51, N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) VAL [\old(N)=0, N=2] [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=2] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=2] [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=2] [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = 1 [L32] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=2, sum={5:0}] [L32] COND TRUE i