java -ea -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline_WitnessPrinter.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/mod3_true-unreach-call.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-61f4311 [2018-11-23 11:44:37,539 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-23 11:44:37,541 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-23 11:44:37,556 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-23 11:44:37,557 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-23 11:44:37,558 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-23 11:44:37,559 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-23 11:44:37,561 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-23 11:44:37,562 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-23 11:44:37,563 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-23 11:44:37,564 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-23 11:44:37,564 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-23 11:44:37,565 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-23 11:44:37,566 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-23 11:44:37,567 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-23 11:44:37,568 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-23 11:44:37,569 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-23 11:44:37,573 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-23 11:44:37,575 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-23 11:44:37,578 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-23 11:44:37,579 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-23 11:44:37,583 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-23 11:44:37,588 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-23 11:44:37,588 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-23 11:44:37,588 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-23 11:44:37,589 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-23 11:44:37,592 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-23 11:44:37,594 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-23 11:44:37,594 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-23 11:44:37,595 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-23 11:44:37,596 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-23 11:44:37,596 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-23 11:44:37,597 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-23 11:44:37,598 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-23 11:44:37,599 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-23 11:44:37,599 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-23 11:44:37,601 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf [2018-11-23 11:44:37,623 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-23 11:44:37,624 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-23 11:44:37,625 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-23 11:44:37,625 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-23 11:44:37,626 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-23 11:44:37,626 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-23 11:44:37,626 INFO L133 SettingsManager]: * Use SBE=true [2018-11-23 11:44:37,630 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-23 11:44:37,630 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-23 11:44:37,630 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-23 11:44:37,630 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-23 11:44:37,631 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-23 11:44:37,631 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-23 11:44:37,631 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-23 11:44:37,631 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-11-23 11:44:37,631 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-11-23 11:44:37,632 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-23 11:44:37,632 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-23 11:44:37,632 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-23 11:44:37,632 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-23 11:44:37,632 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-23 11:44:37,634 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-23 11:44:37,634 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-23 11:44:37,634 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-23 11:44:37,634 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 11:44:37,635 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-23 11:44:37,635 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-23 11:44:37,635 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-23 11:44:37,635 INFO L133 SettingsManager]: * Trace refinement strategy=WOLF [2018-11-23 11:44:37,636 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-23 11:44:37,636 INFO L133 SettingsManager]: * Command for external solver=cvc4nyu --tear-down-incremental --rewrite-divk --print-success --lang smt [2018-11-23 11:44:37,636 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-11-23 11:44:37,636 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-23 11:44:37,706 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-23 11:44:37,725 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-23 11:44:37,729 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-23 11:44:37,730 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-23 11:44:37,731 INFO L276 PluginConnector]: CDTParser initialized [2018-11-23 11:44:37,732 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/mod3_true-unreach-call.c.v+cfa-reducer.c [2018-11-23 11:44:37,787 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8b93e9d4/472ba7b1a41d4417b2386f0a3cf0b106/FLAGf7e55dd7f [2018-11-23 11:44:38,238 INFO L307 CDTParser]: Found 1 translation units. [2018-11-23 11:44:38,239 INFO L161 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/mod3_true-unreach-call.c.v+cfa-reducer.c [2018-11-23 11:44:38,246 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8b93e9d4/472ba7b1a41d4417b2386f0a3cf0b106/FLAGf7e55dd7f [2018-11-23 11:44:38,570 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8b93e9d4/472ba7b1a41d4417b2386f0a3cf0b106 [2018-11-23 11:44:38,581 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-23 11:44:38,583 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-23 11:44:38,584 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-23 11:44:38,584 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-23 11:44:38,588 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-23 11:44:38,590 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:44:38" (1/1) ... [2018-11-23 11:44:38,593 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f26af5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:44:38, skipping insertion in model container [2018-11-23 11:44:38,594 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:44:38" (1/1) ... [2018-11-23 11:44:38,605 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-23 11:44:38,629 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-23 11:44:38,853 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 11:44:38,863 INFO L191 MainTranslator]: Completed pre-run [2018-11-23 11:44:38,893 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 11:44:38,907 INFO L195 MainTranslator]: Completed translation [2018-11-23 11:44:38,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:44:38 WrapperNode [2018-11-23 11:44:38,908 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-23 11:44:38,909 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-23 11:44:38,909 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-23 11:44:38,909 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-23 11:44:38,919 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:44:38" (1/1) ... [2018-11-23 11:44:38,927 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:44:38" (1/1) ... [2018-11-23 11:44:38,934 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-23 11:44:38,934 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-23 11:44:38,934 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-23 11:44:38,935 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-23 11:44:38,943 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:44:38" (1/1) ... [2018-11-23 11:44:38,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:44:38" (1/1) ... [2018-11-23 11:44:38,945 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:44:38" (1/1) ... [2018-11-23 11:44:38,945 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:44:38" (1/1) ... [2018-11-23 11:44:38,953 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:44:38" (1/1) ... [2018-11-23 11:44:38,957 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:44:38" (1/1) ... [2018-11-23 11:44:38,959 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:44:38" (1/1) ... [2018-11-23 11:44:38,960 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-23 11:44:38,961 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-23 11:44:38,961 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-23 11:44:38,961 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-23 11:44:38,962 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:44:38" (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 [2018-11-23 11:44:39,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-23 11:44:39,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-23 11:44:39,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-23 11:44:39,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-23 11:44:39,104 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-23 11:44:39,104 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-23 11:44:39,738 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-23 11:44:39,738 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-23 11:44:39,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:44:39 BoogieIcfgContainer [2018-11-23 11:44:39,739 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-23 11:44:39,740 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-23 11:44:39,740 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-23 11:44:39,744 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-23 11:44:39,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:44:38" (1/3) ... [2018-11-23 11:44:39,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44b0c2d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:44:39, skipping insertion in model container [2018-11-23 11:44:39,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:44:38" (2/3) ... [2018-11-23 11:44:39,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44b0c2d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:44:39, skipping insertion in model container [2018-11-23 11:44:39,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:44:39" (3/3) ... [2018-11-23 11:44:39,748 INFO L112 eAbstractionObserver]: Analyzing ICFG mod3_true-unreach-call.c.v+cfa-reducer.c [2018-11-23 11:44:39,758 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-23 11:44:39,765 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-23 11:44:39,784 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-23 11:44:39,818 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-23 11:44:39,819 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-23 11:44:39,820 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-23 11:44:39,820 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-23 11:44:39,821 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-23 11:44:39,821 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-23 11:44:39,821 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-23 11:44:39,821 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-23 11:44:39,822 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-23 11:44:39,841 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-11-23 11:44:39,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-23 11:44:39,848 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 11:44:39,849 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 11:44:39,852 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 11:44:39,858 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 11:44:39,859 INFO L82 PathProgramCache]: Analyzing trace with hash 964689295, now seen corresponding path program 1 times [2018-11-23 11:44:39,864 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-23 11:44:39,864 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 2 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-23 11:44:39,890 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 11:44:39,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 11:44:39,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 11:44:39,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 11:44:40,051 INFO L256 TraceCheckUtils]: 0: Hoare triple {22#true} call ULTIMATE.init(); {22#true} is VALID [2018-11-23 11:44:40,056 INFO L273 TraceCheckUtils]: 1: Hoare triple {22#true} ~__return_main~0 := 0bv32;~__return_107~0 := 0bv32; {22#true} is VALID [2018-11-23 11:44:40,057 INFO L273 TraceCheckUtils]: 2: Hoare triple {22#true} assume true; {22#true} is VALID [2018-11-23 11:44:40,057 INFO L268 TraceCheckUtils]: 3: Hoare quadruple {22#true} {22#true} #41#return; {22#true} is VALID [2018-11-23 11:44:40,058 INFO L256 TraceCheckUtils]: 4: Hoare triple {22#true} call #t~ret2 := main(); {22#true} is VALID [2018-11-23 11:44:40,071 INFO L273 TraceCheckUtils]: 5: Hoare triple {22#true} havoc ~main__x~0;~main__y~0 := 1bv32; {42#(= (_ bv1 32) main_~main__y~0)} is VALID [2018-11-23 11:44:40,086 INFO L273 TraceCheckUtils]: 6: Hoare triple {42#(= (_ bv1 32) main_~main__y~0)} havoc ~main____CPAchecker_TMP_0~0;~main____CPAchecker_TMP_0~0 := #t~nondet0;havoc #t~nondet0; {42#(= (_ bv1 32) main_~main__y~0)} is VALID [2018-11-23 11:44:40,093 INFO L273 TraceCheckUtils]: 7: Hoare triple {42#(= (_ bv1 32) main_~main__y~0)} assume !!(0bv32 == ~main____CPAchecker_TMP_0~0); {42#(= (_ bv1 32) main_~main__y~0)} is VALID [2018-11-23 11:44:40,094 INFO L273 TraceCheckUtils]: 8: Hoare triple {42#(= (_ bv1 32) main_~main__y~0)} assume 0bv32 == ~main__y~0;havoc ~__tmp_1~0;~__tmp_1~0 := (if 0bv32 == ~bvurem32(~main__x~0, 3bv32) then 1bv32 else 0bv32);havoc ~__VERIFIER_assert__cond~0;~__VERIFIER_assert__cond~0 := ~__tmp_1~0; {23#false} is VALID [2018-11-23 11:44:40,094 INFO L273 TraceCheckUtils]: 9: Hoare triple {23#false} assume 0bv32 == ~__VERIFIER_assert__cond~0; {23#false} is VALID [2018-11-23 11:44:40,095 INFO L273 TraceCheckUtils]: 10: Hoare triple {23#false} assume !false; {23#false} is VALID [2018-11-23 11:44:40,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 11:44:40,098 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-23 11:44:40,101 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 11:44:40,102 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-23 11:44:40,106 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-11-23 11:44:40,110 INFO L84 Accepts]: Finished accepts. word is accepted. [2018-11-23 11:44:40,114 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 3 states. [2018-11-23 11:44:40,170 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 11 edges. 11 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2018-11-23 11:44:40,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-23 11:44:40,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-23 11:44:40,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-23 11:44:40,182 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2018-11-23 11:44:40,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 11:44:40,853 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2018-11-23 11:44:40,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-23 11:44:40,853 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-11-23 11:44:40,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 11:44:40,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2018-11-23 11:44:40,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 44 transitions. [2018-11-23 11:44:40,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2018-11-23 11:44:40,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 44 transitions. [2018-11-23 11:44:40,872 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 3 states and 44 transitions. [2018-11-23 11:44:41,081 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 44 edges. 44 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2018-11-23 11:44:41,092 INFO L225 Difference]: With dead ends: 34 [2018-11-23 11:44:41,093 INFO L226 Difference]: Without dead ends: 20 [2018-11-23 11:44:41,096 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-23 11:44:41,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-11-23 11:44:41,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2018-11-23 11:44:41,155 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2018-11-23 11:44:41,156 INFO L82 GeneralOperation]: Start isEquivalent. First operand 20 states. Second operand 17 states. [2018-11-23 11:44:41,156 INFO L74 IsIncluded]: Start isIncluded. First operand 20 states. Second operand 17 states. [2018-11-23 11:44:41,156 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 17 states. [2018-11-23 11:44:41,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 11:44:41,161 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2018-11-23 11:44:41,161 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2018-11-23 11:44:41,161 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-23 11:44:41,161 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2018-11-23 11:44:41,162 INFO L74 IsIncluded]: Start isIncluded. First operand 17 states. Second operand 20 states. [2018-11-23 11:44:41,162 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 20 states. [2018-11-23 11:44:41,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 11:44:41,166 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2018-11-23 11:44:41,166 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2018-11-23 11:44:41,166 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-23 11:44:41,167 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2018-11-23 11:44:41,167 INFO L88 GeneralOperation]: Finished isEquivalent. [2018-11-23 11:44:41,167 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2018-11-23 11:44:41,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-11-23 11:44:41,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2018-11-23 11:44:41,171 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2018-11-23 11:44:41,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 11:44:41,172 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2018-11-23 11:44:41,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-23 11:44:41,172 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2018-11-23 11:44:41,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-23 11:44:41,173 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 11:44:41,173 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 11:44:41,173 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 11:44:41,174 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 11:44:41,174 INFO L82 PathProgramCache]: Analyzing trace with hash 2096975293, now seen corresponding path program 1 times [2018-11-23 11:44:41,174 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-23 11:44:41,174 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-23 11:44:41,196 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 11:45:00,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 11:45:02,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2018-11-23 11:45:02,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 11:45:17,264 WARN L180 SmtUtils]: Spent 10.11 s on a formula simplification that was a NOOP. DAG size: 20 [2018-11-23 11:45:23,334 WARN L832 $PredicateComparison]: unable to prove that (exists ((main_~main__x~0 (_ BitVec 32))) (and (not (= (_ bv0 32) (bvurem main_~main__x~0 (_ bv3 32)))) (= (_ bv1 32) (bvurem (bvadd main_~main__x~0 (_ bv4294967294 32)) (_ bv3 32))))) is different from false [2018-11-23 11:45:25,344 WARN L854 $PredicateComparison]: unable to prove that (exists ((main_~main__x~0 (_ BitVec 32))) (and (not (= (_ bv0 32) (bvurem main_~main__x~0 (_ bv3 32)))) (= (_ bv1 32) (bvurem (bvadd main_~main__x~0 (_ bv4294967294 32)) (_ bv3 32))))) is different from true [2018-11-23 11:45:25,344 INFO L256 TraceCheckUtils]: 0: Hoare triple {160#true} call ULTIMATE.init(); {160#true} is VALID [2018-11-23 11:45:25,345 INFO L273 TraceCheckUtils]: 1: Hoare triple {160#true} ~__return_main~0 := 0bv32;~__return_107~0 := 0bv32; {160#true} is VALID [2018-11-23 11:45:25,345 INFO L273 TraceCheckUtils]: 2: Hoare triple {160#true} assume true; {160#true} is VALID [2018-11-23 11:45:25,345 INFO L268 TraceCheckUtils]: 3: Hoare quadruple {160#true} {160#true} #41#return; {160#true} is VALID [2018-11-23 11:45:25,346 INFO L256 TraceCheckUtils]: 4: Hoare triple {160#true} call #t~ret2 := main(); {160#true} is VALID [2018-11-23 11:45:25,346 INFO L273 TraceCheckUtils]: 5: Hoare triple {160#true} havoc ~main__x~0;~main__y~0 := 1bv32; {160#true} is VALID [2018-11-23 11:45:25,346 INFO L273 TraceCheckUtils]: 6: Hoare triple {160#true} havoc ~main____CPAchecker_TMP_0~0;~main____CPAchecker_TMP_0~0 := #t~nondet0;havoc #t~nondet0; {160#true} is VALID [2018-11-23 11:45:25,347 INFO L273 TraceCheckUtils]: 7: Hoare triple {160#true} assume !(0bv32 == ~main____CPAchecker_TMP_0~0); {160#true} is VALID [2018-11-23 11:45:27,378 INFO L273 TraceCheckUtils]: 8: Hoare triple {160#true} assume 1bv32 == ~bvurem32(~main__x~0, 3bv32);~main__x~0 := ~bvadd32(2bv32, ~main__x~0);~main__y~0 := 0bv32; {189#(= (_ bv1 32) (bvurem (bvadd main_~main__x~0 (_ bv4294967294 32)) (_ bv3 32)))} is UNKNOWN [2018-11-23 11:45:27,379 INFO L273 TraceCheckUtils]: 9: Hoare triple {189#(= (_ bv1 32) (bvurem (bvadd main_~main__x~0 (_ bv4294967294 32)) (_ bv3 32)))} havoc ~main____CPAchecker_TMP_0~0;~main____CPAchecker_TMP_0~0 := #t~nondet0;havoc #t~nondet0; {189#(= (_ bv1 32) (bvurem (bvadd main_~main__x~0 (_ bv4294967294 32)) (_ bv3 32)))} is VALID [2018-11-23 11:45:27,380 INFO L273 TraceCheckUtils]: 10: Hoare triple {189#(= (_ bv1 32) (bvurem (bvadd main_~main__x~0 (_ bv4294967294 32)) (_ bv3 32)))} assume !!(0bv32 == ~main____CPAchecker_TMP_0~0); {189#(= (_ bv1 32) (bvurem (bvadd main_~main__x~0 (_ bv4294967294 32)) (_ bv3 32)))} is VALID [2018-11-23 11:45:27,417 INFO L273 TraceCheckUtils]: 11: Hoare triple {189#(= (_ bv1 32) (bvurem (bvadd main_~main__x~0 (_ bv4294967294 32)) (_ bv3 32)))} assume 0bv32 == ~main__y~0;havoc ~__tmp_1~0;~__tmp_1~0 := (if 0bv32 == ~bvurem32(~main__x~0, 3bv32) then 1bv32 else 0bv32);havoc ~__VERIFIER_assert__cond~0;~__VERIFIER_assert__cond~0 := ~__tmp_1~0; {199#(or (= (bvadd main_~__VERIFIER_assert__cond~0 (_ bv4294967295 32)) (_ bv0 32)) (and (exists ((main_~main__x~0 (_ BitVec 32))) (and (not (= (_ bv0 32) (bvurem main_~main__x~0 (_ bv3 32)))) (= (_ bv1 32) (bvurem (bvadd main_~main__x~0 (_ bv4294967294 32)) (_ bv3 32))))) (= main_~__VERIFIER_assert__cond~0 (_ bv0 32))))} is VALID [2018-11-23 11:45:27,418 INFO L273 TraceCheckUtils]: 12: Hoare triple {199#(or (= (bvadd main_~__VERIFIER_assert__cond~0 (_ bv4294967295 32)) (_ bv0 32)) (and (exists ((main_~main__x~0 (_ BitVec 32))) (and (not (= (_ bv0 32) (bvurem main_~main__x~0 (_ bv3 32)))) (= (_ bv1 32) (bvurem (bvadd main_~main__x~0 (_ bv4294967294 32)) (_ bv3 32))))) (= main_~__VERIFIER_assert__cond~0 (_ bv0 32))))} assume 0bv32 == ~__VERIFIER_assert__cond~0; {203#(exists ((main_~main__x~0 (_ BitVec 32))) (and (not (= (_ bv0 32) (bvurem main_~main__x~0 (_ bv3 32)))) (= (_ bv1 32) (bvurem (bvadd main_~main__x~0 (_ bv4294967294 32)) (_ bv3 32)))))} is VALID [2018-11-23 11:45:29,430 INFO L273 TraceCheckUtils]: 13: Hoare triple {203#(exists ((main_~main__x~0 (_ BitVec 32))) (and (not (= (_ bv0 32) (bvurem main_~main__x~0 (_ bv3 32)))) (= (_ bv1 32) (bvurem (bvadd main_~main__x~0 (_ bv4294967294 32)) (_ bv3 32)))))} assume !false; {161#false} is UNKNOWN [2018-11-23 11:45:29,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 11:45:29,433 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-23 11:45:29,436 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 11:45:29,436 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-23 11:45:29,437 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-11-23 11:45:29,438 INFO L84 Accepts]: Finished accepts. word is accepted. [2018-11-23 11:45:29,438 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 5 states. [2018-11-23 11:45:33,602 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 14 edges. 12 inductive. 0 not inductive. 2 times theorem prover too weak to decide inductivity. [2018-11-23 11:45:33,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 11:45:33,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 11:45:33,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=7, Unknown=2, NotChecked=4, Total=20 [2018-11-23 11:45:33,604 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 5 states. [2018-11-23 11:46:31,185 WARN L180 SmtUtils]: Spent 10.49 s on a formula simplification that was a NOOP. DAG size: 21 [2018-11-23 11:46:52,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 11:46:52,139 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2018-11-23 11:46:52,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-23 11:46:52,140 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-11-23 11:46:52,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 11:46:52,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-23 11:46:52,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 42 transitions. [2018-11-23 11:46:52,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-23 11:46:52,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 42 transitions. [2018-11-23 11:46:52,146 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 5 states and 42 transitions. [2018-11-23 11:46:58,088 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 42 edges. 40 inductive. 0 not inductive. 2 times theorem prover too weak to decide inductivity. [2018-11-23 11:46:58,090 INFO L225 Difference]: With dead ends: 36 [2018-11-23 11:46:58,090 INFO L226 Difference]: Without dead ends: 22 [2018-11-23 11:46:58,091 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.0s TimeCoverageRelationStatistics Valid=11, Invalid=11, Unknown=2, NotChecked=6, Total=30 [2018-11-23 11:46:58,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-11-23 11:46:58,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2018-11-23 11:46:58,102 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2018-11-23 11:46:58,102 INFO L82 GeneralOperation]: Start isEquivalent. First operand 22 states. Second operand 21 states. [2018-11-23 11:46:58,102 INFO L74 IsIncluded]: Start isIncluded. First operand 22 states. Second operand 21 states. [2018-11-23 11:46:58,102 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 21 states. [2018-11-23 11:46:58,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 11:46:58,105 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2018-11-23 11:46:58,105 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2018-11-23 11:46:58,106 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-23 11:46:58,106 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2018-11-23 11:46:58,106 INFO L74 IsIncluded]: Start isIncluded. First operand 21 states. Second operand 22 states. [2018-11-23 11:46:58,106 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 22 states. [2018-11-23 11:46:58,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 11:46:58,109 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2018-11-23 11:46:58,109 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2018-11-23 11:46:58,110 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-23 11:46:58,110 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2018-11-23 11:46:58,110 INFO L88 GeneralOperation]: Finished isEquivalent. [2018-11-23 11:46:58,111 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2018-11-23 11:46:58,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-23 11:46:58,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2018-11-23 11:46:58,113 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 14 [2018-11-23 11:46:58,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 11:46:58,113 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2018-11-23 11:46:58,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 11:46:58,114 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2018-11-23 11:46:58,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-23 11:46:58,114 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 11:46:58,115 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 11:46:58,115 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 11:46:58,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 11:46:58,116 INFO L82 PathProgramCache]: Analyzing trace with hash -726667991, now seen corresponding path program 1 times [2018-11-23 11:46:58,116 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-23 11:46:58,116 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-23 11:46:58,134 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 11:47:13,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 11:47:15,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2018-11-23 11:47:15,680 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 11:47:30,279 WARN L180 SmtUtils]: Spent 10.13 s on a formula simplification that was a NOOP. DAG size: 19 [2018-11-23 11:47:36,363 WARN L832 $PredicateComparison]: unable to prove that (exists ((main_~main__x~0 (_ BitVec 32))) (and (not (= (_ bv0 32) (bvurem main_~main__x~0 (_ bv3 32)))) (= (_ bv2 32) (bvurem (bvadd main_~main__x~0 (_ bv4294967295 32)) (_ bv3 32))))) is different from false [2018-11-23 11:47:38,376 WARN L854 $PredicateComparison]: unable to prove that (exists ((main_~main__x~0 (_ BitVec 32))) (and (not (= (_ bv0 32) (bvurem main_~main__x~0 (_ bv3 32)))) (= (_ bv2 32) (bvurem (bvadd main_~main__x~0 (_ bv4294967295 32)) (_ bv3 32))))) is different from true [2018-11-23 11:47:38,377 INFO L256 TraceCheckUtils]: 0: Hoare triple {325#true} call ULTIMATE.init(); {325#true} is VALID [2018-11-23 11:47:38,377 INFO L273 TraceCheckUtils]: 1: Hoare triple {325#true} ~__return_main~0 := 0bv32;~__return_107~0 := 0bv32; {325#true} is VALID [2018-11-23 11:47:38,377 INFO L273 TraceCheckUtils]: 2: Hoare triple {325#true} assume true; {325#true} is VALID [2018-11-23 11:47:38,378 INFO L268 TraceCheckUtils]: 3: Hoare quadruple {325#true} {325#true} #41#return; {325#true} is VALID [2018-11-23 11:47:38,378 INFO L256 TraceCheckUtils]: 4: Hoare triple {325#true} call #t~ret2 := main(); {325#true} is VALID [2018-11-23 11:47:38,378 INFO L273 TraceCheckUtils]: 5: Hoare triple {325#true} havoc ~main__x~0;~main__y~0 := 1bv32; {325#true} is VALID [2018-11-23 11:47:38,378 INFO L273 TraceCheckUtils]: 6: Hoare triple {325#true} havoc ~main____CPAchecker_TMP_0~0;~main____CPAchecker_TMP_0~0 := #t~nondet0;havoc #t~nondet0; {325#true} is VALID [2018-11-23 11:47:38,379 INFO L273 TraceCheckUtils]: 7: Hoare triple {325#true} assume !(0bv32 == ~main____CPAchecker_TMP_0~0); {325#true} is VALID [2018-11-23 11:47:38,379 INFO L273 TraceCheckUtils]: 8: Hoare triple {325#true} assume !(1bv32 == ~bvurem32(~main__x~0, 3bv32)); {325#true} is VALID [2018-11-23 11:47:40,393 INFO L273 TraceCheckUtils]: 9: Hoare triple {325#true} assume 2bv32 == ~bvurem32(~main__x~0, 3bv32);~main__x~0 := ~bvadd32(1bv32, ~main__x~0);~main__y~0 := 0bv32; {357#(= (_ bv2 32) (bvurem (bvadd main_~main__x~0 (_ bv4294967295 32)) (_ bv3 32)))} is UNKNOWN [2018-11-23 11:47:40,394 INFO L273 TraceCheckUtils]: 10: Hoare triple {357#(= (_ bv2 32) (bvurem (bvadd main_~main__x~0 (_ bv4294967295 32)) (_ bv3 32)))} havoc ~main____CPAchecker_TMP_0~0;~main____CPAchecker_TMP_0~0 := #t~nondet0;havoc #t~nondet0; {357#(= (_ bv2 32) (bvurem (bvadd main_~main__x~0 (_ bv4294967295 32)) (_ bv3 32)))} is VALID [2018-11-23 11:47:40,394 INFO L273 TraceCheckUtils]: 11: Hoare triple {357#(= (_ bv2 32) (bvurem (bvadd main_~main__x~0 (_ bv4294967295 32)) (_ bv3 32)))} assume !!(0bv32 == ~main____CPAchecker_TMP_0~0); {357#(= (_ bv2 32) (bvurem (bvadd main_~main__x~0 (_ bv4294967295 32)) (_ bv3 32)))} is VALID [2018-11-23 11:47:40,424 INFO L273 TraceCheckUtils]: 12: Hoare triple {357#(= (_ bv2 32) (bvurem (bvadd main_~main__x~0 (_ bv4294967295 32)) (_ bv3 32)))} assume 0bv32 == ~main__y~0;havoc ~__tmp_1~0;~__tmp_1~0 := (if 0bv32 == ~bvurem32(~main__x~0, 3bv32) then 1bv32 else 0bv32);havoc ~__VERIFIER_assert__cond~0;~__VERIFIER_assert__cond~0 := ~__tmp_1~0; {367#(or (= (bvadd main_~__VERIFIER_assert__cond~0 (_ bv4294967295 32)) (_ bv0 32)) (and (= main_~__VERIFIER_assert__cond~0 (_ bv0 32)) (exists ((main_~main__x~0 (_ BitVec 32))) (and (not (= (_ bv0 32) (bvurem main_~main__x~0 (_ bv3 32)))) (= (_ bv2 32) (bvurem (bvadd main_~main__x~0 (_ bv4294967295 32)) (_ bv3 32)))))))} is VALID [2018-11-23 11:47:40,426 INFO L273 TraceCheckUtils]: 13: Hoare triple {367#(or (= (bvadd main_~__VERIFIER_assert__cond~0 (_ bv4294967295 32)) (_ bv0 32)) (and (= main_~__VERIFIER_assert__cond~0 (_ bv0 32)) (exists ((main_~main__x~0 (_ BitVec 32))) (and (not (= (_ bv0 32) (bvurem main_~main__x~0 (_ bv3 32)))) (= (_ bv2 32) (bvurem (bvadd main_~main__x~0 (_ bv4294967295 32)) (_ bv3 32)))))))} assume 0bv32 == ~__VERIFIER_assert__cond~0; {371#(exists ((main_~main__x~0 (_ BitVec 32))) (and (not (= (_ bv0 32) (bvurem main_~main__x~0 (_ bv3 32)))) (= (_ bv2 32) (bvurem (bvadd main_~main__x~0 (_ bv4294967295 32)) (_ bv3 32)))))} is VALID [2018-11-23 11:47:42,439 INFO L273 TraceCheckUtils]: 14: Hoare triple {371#(exists ((main_~main__x~0 (_ BitVec 32))) (and (not (= (_ bv0 32) (bvurem main_~main__x~0 (_ bv3 32)))) (= (_ bv2 32) (bvurem (bvadd main_~main__x~0 (_ bv4294967295 32)) (_ bv3 32)))))} assume !false; {326#false} is UNKNOWN [2018-11-23 11:47:42,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 11:47:42,441 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-23 11:47:42,447 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 11:47:42,448 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-23 11:47:42,448 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-11-23 11:47:42,448 INFO L84 Accepts]: Finished accepts. word is accepted. [2018-11-23 11:47:42,448 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 5 states. [2018-11-23 11:47:46,629 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 15 edges. 13 inductive. 0 not inductive. 2 times theorem prover too weak to decide inductivity. [2018-11-23 11:47:46,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 11:47:46,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 11:47:46,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=7, Unknown=2, NotChecked=4, Total=20 [2018-11-23 11:47:46,630 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 5 states.