java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test23-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:08:38,931 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:08:38,933 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:08:38,952 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:08:38,953 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:08:38,955 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:08:38,957 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:08:38,966 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:08:38,971 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:08:38,974 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:08:38,976 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:08:38,978 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:08:38,978 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:08:38,980 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:08:38,982 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:08:38,984 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:08:38,986 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:08:38,987 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:08:38,988 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:08:38,993 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:08:38,997 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:08:39,000 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:08:39,003 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:08:39,004 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:08:39,006 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 23:08:39,006 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 23:08:39,006 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 23:08:39,008 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 23:08:39,009 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 23:08:39,011 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 23:08:39,011 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:08:39,012 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:08:39,013 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:08:39,014 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:08:39,016 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:08:39,016 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:08:39,017 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:08:39,017 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:08:39,017 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:08:39,018 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:08:39,019 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:08:39,020 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 [2019-10-14 23:08:39,038 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:08:39,039 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:08:39,040 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:08:39,040 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:08:39,040 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:08:39,041 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:08:39,041 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:08:39,041 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:08:39,041 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:08:39,041 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:08:39,042 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:08:39,042 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:08:39,042 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:08:39,042 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:08:39,042 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:08:39,043 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:08:39,043 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:08:39,043 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:08:39,043 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:08:39,043 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:08:39,044 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:08:39,044 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:08:39,044 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:08:39,044 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:08:39,045 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:08:39,045 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:08:39,045 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:08:39,045 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:08:39,045 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:08:39,340 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:08:39,353 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:08:39,357 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:08:39,359 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:08:39,359 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:08:39,360 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test23-2.c [2019-10-14 23:08:39,451 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e24129506/6c71f85f9e2547f8abb97109c8644d51/FLAG80a6e786e [2019-10-14 23:08:39,963 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:08:39,964 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test23-2.c [2019-10-14 23:08:39,970 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e24129506/6c71f85f9e2547f8abb97109c8644d51/FLAG80a6e786e [2019-10-14 23:08:40,390 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e24129506/6c71f85f9e2547f8abb97109c8644d51 [2019-10-14 23:08:40,402 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:08:40,404 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:08:40,407 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:08:40,407 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:08:40,410 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:08:40,411 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:08:40" (1/1) ... [2019-10-14 23:08:40,414 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@158ee02b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:08:40, skipping insertion in model container [2019-10-14 23:08:40,414 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:08:40" (1/1) ... [2019-10-14 23:08:40,422 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:08:40,442 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:08:40,673 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:08:40,689 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:08:40,801 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:08:40,821 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:08:40,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:08:40 WrapperNode [2019-10-14 23:08:40,822 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:08:40,823 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:08:40,823 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:08:40,823 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:08:40,837 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:08:40" (1/1) ... [2019-10-14 23:08:40,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:08:40" (1/1) ... [2019-10-14 23:08:40,847 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:08:40" (1/1) ... [2019-10-14 23:08:40,848 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:08:40" (1/1) ... [2019-10-14 23:08:40,857 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:08:40" (1/1) ... [2019-10-14 23:08:40,862 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:08:40" (1/1) ... [2019-10-14 23:08:40,864 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:08:40" (1/1) ... [2019-10-14 23:08:40,866 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:08:40,867 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:08:40,867 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:08:40,867 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:08:40,868 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:08:40" (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 [2019-10-14 23:08:40,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:08:40,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:08:40,925 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2019-10-14 23:08:40,925 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dummy [2019-10-14 23:08:40,925 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2019-10-14 23:08:40,925 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:08:40,925 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:08:40,925 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:08:40,925 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2019-10-14 23:08:40,925 INFO L130 BoogieDeclarations]: Found specification of procedure init [2019-10-14 23:08:40,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 23:08:40,926 INFO L130 BoogieDeclarations]: Found specification of procedure get_dummy [2019-10-14 23:08:40,926 INFO L130 BoogieDeclarations]: Found specification of procedure check [2019-10-14 23:08:40,926 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 23:08:40,926 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:08:40,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:08:40,927 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 23:08:40,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:08:40,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 23:08:41,298 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:08:41,298 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:08:41,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:08:41 BoogieIcfgContainer [2019-10-14 23:08:41,300 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:08:41,301 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:08:41,301 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:08:41,304 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:08:41,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:08:40" (1/3) ... [2019-10-14 23:08:41,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f927578 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:08:41, skipping insertion in model container [2019-10-14 23:08:41,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:08:40" (2/3) ... [2019-10-14 23:08:41,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f927578 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:08:41, skipping insertion in model container [2019-10-14 23:08:41,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:08:41" (3/3) ... [2019-10-14 23:08:41,308 INFO L109 eAbstractionObserver]: Analyzing ICFG test23-2.c [2019-10-14 23:08:41,320 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:08:41,331 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:08:41,343 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:08:41,369 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:08:41,369 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:08:41,369 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:08:41,369 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:08:41,370 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:08:41,370 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:08:41,370 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:08:41,370 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:08:41,386 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-10-14 23:08:41,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-14 23:08:41,392 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:08:41,393 INFO L380 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] [2019-10-14 23:08:41,395 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:08:41,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:08:41,400 INFO L82 PathProgramCache]: Analyzing trace with hash -128514638, now seen corresponding path program 1 times [2019-10-14 23:08:41,408 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:08:41,408 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128885978] [2019-10-14 23:08:41,409 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:08:41,409 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:08:41,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:08:41,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:08:41,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:08:41,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:08:41,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:08:41,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:08:41,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:08:41,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:08:41,741 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128885978] [2019-10-14 23:08:41,742 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:08:41,742 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:08:41,742 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089669102] [2019-10-14 23:08:41,747 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:08:41,748 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:08:41,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:08:41,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:08:41,761 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 4 states. [2019-10-14 23:08:41,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:08:41,917 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2019-10-14 23:08:41,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:08:41,919 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2019-10-14 23:08:41,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:08:41,929 INFO L225 Difference]: With dead ends: 46 [2019-10-14 23:08:41,929 INFO L226 Difference]: Without dead ends: 28 [2019-10-14 23:08:41,933 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:08:41,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-14 23:08:41,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-10-14 23:08:41,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 23:08:41,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-10-14 23:08:41,977 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 30 [2019-10-14 23:08:41,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:08:41,980 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-10-14 23:08:41,980 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:08:41,980 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-10-14 23:08:41,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-14 23:08:41,982 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:08:41,982 INFO L380 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, 1] [2019-10-14 23:08:41,982 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:08:41,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:08:41,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1246729484, now seen corresponding path program 1 times [2019-10-14 23:08:41,983 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:08:41,983 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985610869] [2019-10-14 23:08:41,984 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:08:41,984 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:08:41,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:08:42,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:08:42,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:08:42,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:08:42,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:08:42,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:08:42,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:08:42,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:08:42,539 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985610869] [2019-10-14 23:08:42,540 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:08:42,540 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2019-10-14 23:08:42,541 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433356353] [2019-10-14 23:08:42,546 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 23:08:42,547 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:08:42,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 23:08:42,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:08:42,550 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 13 states. [2019-10-14 23:08:43,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:08:43,115 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2019-10-14 23:08:43,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 23:08:43,115 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2019-10-14 23:08:43,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:08:43,119 INFO L225 Difference]: With dead ends: 54 [2019-10-14 23:08:43,119 INFO L226 Difference]: Without dead ends: 46 [2019-10-14 23:08:43,120 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:08:43,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-14 23:08:43,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2019-10-14 23:08:43,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-14 23:08:43,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2019-10-14 23:08:43,133 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 31 [2019-10-14 23:08:43,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:08:43,134 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2019-10-14 23:08:43,134 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 23:08:43,134 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2019-10-14 23:08:43,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-14 23:08:43,136 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:08:43,136 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:08:43,136 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:08:43,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:08:43,137 INFO L82 PathProgramCache]: Analyzing trace with hash -824027658, now seen corresponding path program 1 times [2019-10-14 23:08:43,137 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:08:43,137 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231278137] [2019-10-14 23:08:43,137 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:08:43,138 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:08:43,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:08:43,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:08:43,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:08:43,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:08:43,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:08:43,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:08:43,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:08:43,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:08:43,379 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231278137] [2019-10-14 23:08:43,379 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332534701] [2019-10-14 23:08:43,379 INFO L94 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 [2019-10-14 23:08:43,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:08:43,478 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-14 23:08:43,486 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:08:43,549 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2019-10-14 23:08:43,551 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-10-14 23:08:43,570 INFO L567 ElimStorePlain]: treesize reduction 14, result has 22.2 percent of original size [2019-10-14 23:08:43,570 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:08:43,571 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:4 [2019-10-14 23:08:43,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:08:43,652 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:08:43,653 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 15 [2019-10-14 23:08:43,653 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580771310] [2019-10-14 23:08:43,655 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 23:08:43,655 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:08:43,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 23:08:43,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:08:43,657 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 15 states. [2019-10-14 23:08:44,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:08:44,190 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2019-10-14 23:08:44,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 23:08:44,191 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2019-10-14 23:08:44,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:08:44,193 INFO L225 Difference]: With dead ends: 56 [2019-10-14 23:08:44,193 INFO L226 Difference]: Without dead ends: 44 [2019-10-14 23:08:44,194 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2019-10-14 23:08:44,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-14 23:08:44,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2019-10-14 23:08:44,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-14 23:08:44,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2019-10-14 23:08:44,204 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 31 [2019-10-14 23:08:44,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:08:44,205 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2019-10-14 23:08:44,205 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 23:08:44,205 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2019-10-14 23:08:44,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-14 23:08:44,207 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:08:44,207 INFO L380 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, 1] [2019-10-14 23:08:44,410 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:08:44,411 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:08:44,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:08:44,411 INFO L82 PathProgramCache]: Analyzing trace with hash -2103891336, now seen corresponding path program 1 times [2019-10-14 23:08:44,412 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:08:44,412 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717700588] [2019-10-14 23:08:44,413 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:08:44,413 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:08:44,413 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:08:44,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:08:44,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:08:44,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:08:44,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:08:44,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:08:44,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:08:44,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:08:44,765 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717700588] [2019-10-14 23:08:44,766 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:08:44,768 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2019-10-14 23:08:44,768 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838825257] [2019-10-14 23:08:44,769 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 23:08:44,769 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:08:44,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 23:08:44,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:08:44,770 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 13 states. [2019-10-14 23:08:45,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:08:45,307 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2019-10-14 23:08:45,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 23:08:45,308 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2019-10-14 23:08:45,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:08:45,309 INFO L225 Difference]: With dead ends: 54 [2019-10-14 23:08:45,309 INFO L226 Difference]: Without dead ends: 46 [2019-10-14 23:08:45,310 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2019-10-14 23:08:45,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-14 23:08:45,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 35. [2019-10-14 23:08:45,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-14 23:08:45,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2019-10-14 23:08:45,320 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 31 [2019-10-14 23:08:45,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:08:45,321 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2019-10-14 23:08:45,321 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 23:08:45,321 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2019-10-14 23:08:45,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-14 23:08:45,322 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:08:45,323 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:08:45,323 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:08:45,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:08:45,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1472168143, now seen corresponding path program 1 times [2019-10-14 23:08:45,324 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:08:45,324 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144500007] [2019-10-14 23:08:45,324 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:08:45,324 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:08:45,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:08:45,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:08:45,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:08:45,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:08:45,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:08:45,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:08:45,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:08:45,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:08:45,646 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144500007] [2019-10-14 23:08:45,646 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174096795] [2019-10-14 23:08:45,646 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -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 [2019-10-14 23:08:45,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:08:45,708 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 40 conjunts are in the unsatisfiable core [2019-10-14 23:08:45,712 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:08:45,894 INFO L375 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 24 treesize of output 20 [2019-10-14 23:08:45,895 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:08:45,906 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:08:45,907 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-14 23:08:45,908 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:50 [2019-10-14 23:08:46,035 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 23:08:46,040 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:08:46,040 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 19 [2019-10-14 23:08:46,041 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:08:46,051 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:08:46,053 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-14 23:08:46,053 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:57, output treesize:22 [2019-10-14 23:08:48,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:08:48,166 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:08:48,166 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 24 [2019-10-14 23:08:48,166 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247249988] [2019-10-14 23:08:48,167 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 23:08:48,167 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:08:48,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 23:08:48,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=488, Unknown=2, NotChecked=0, Total=552 [2019-10-14 23:08:48,168 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 24 states. [2019-10-14 23:08:50,954 WARN L191 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2019-10-14 23:08:51,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:08:51,114 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2019-10-14 23:08:51,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 23:08:51,115 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 33 [2019-10-14 23:08:51,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:08:51,116 INFO L225 Difference]: With dead ends: 58 [2019-10-14 23:08:51,116 INFO L226 Difference]: Without dead ends: 50 [2019-10-14 23:08:51,117 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=147, Invalid=907, Unknown=2, NotChecked=0, Total=1056 [2019-10-14 23:08:51,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-14 23:08:51,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 39. [2019-10-14 23:08:51,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-14 23:08:51,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-10-14 23:08:51,127 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 33 [2019-10-14 23:08:51,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:08:51,130 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-10-14 23:08:51,130 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 23:08:51,131 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-10-14 23:08:51,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-14 23:08:51,132 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:08:51,132 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:08:51,340 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:08:51,340 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:08:51,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:08:51,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1921618093, now seen corresponding path program 1 times [2019-10-14 23:08:51,341 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:08:51,341 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990933103] [2019-10-14 23:08:51,341 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:08:51,341 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:08:51,341 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:08:51,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:08:51,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:08:51,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:08:51,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:08:51,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:08:51,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:08:51,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:08:51,647 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990933103] [2019-10-14 23:08:51,647 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464667290] [2019-10-14 23:08:51,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -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 [2019-10-14 23:08:51,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:08:51,741 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 40 conjunts are in the unsatisfiable core [2019-10-14 23:08:51,747 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:08:51,901 INFO L375 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 24 treesize of output 20 [2019-10-14 23:08:51,901 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:08:51,914 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:08:51,915 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-14 23:08:51,915 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:50 [2019-10-14 23:08:52,005 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 23:08:52,008 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:08:52,008 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 19 [2019-10-14 23:08:52,009 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:08:52,020 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:08:52,021 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-14 23:08:52,021 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:57, output treesize:22 [2019-10-14 23:08:54,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:08:54,387 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:08:54,388 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 24 [2019-10-14 23:08:54,388 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620258524] [2019-10-14 23:08:54,389 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 23:08:54,389 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:08:54,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 23:08:54,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=485, Unknown=2, NotChecked=0, Total=552 [2019-10-14 23:08:54,390 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 24 states. [2019-10-14 23:09:00,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:09:00,475 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2019-10-14 23:09:00,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 23:09:00,476 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 33 [2019-10-14 23:09:00,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:09:00,477 INFO L225 Difference]: With dead ends: 58 [2019-10-14 23:09:00,477 INFO L226 Difference]: Without dead ends: 50 [2019-10-14 23:09:00,478 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=185, Invalid=1143, Unknown=4, NotChecked=0, Total=1332 [2019-10-14 23:09:00,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-14 23:09:00,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2019-10-14 23:09:00,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-14 23:09:00,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2019-10-14 23:09:00,489 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 33 [2019-10-14 23:09:00,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:09:00,491 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2019-10-14 23:09:00,491 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 23:09:00,491 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2019-10-14 23:09:00,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-14 23:09:00,495 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:09:00,495 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:09:00,717 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:09:00,718 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:09:00,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:09:00,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1302295574, now seen corresponding path program 2 times [2019-10-14 23:09:00,719 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:09:00,719 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092170562] [2019-10-14 23:09:00,719 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:09:00,720 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:09:00,720 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:09:00,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:09:00,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:09:00,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:09:00,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:09:01,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:09:01,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:09:01,064 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:09:01,065 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092170562] [2019-10-14 23:09:01,065 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021531713] [2019-10-14 23:09:01,065 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:09:01,153 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:09:01,153 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:09:01,156 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 40 conjunts are in the unsatisfiable core [2019-10-14 23:09:01,159 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:09:01,294 INFO L375 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 30 treesize of output 26 [2019-10-14 23:09:01,295 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:09:01,310 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:09:01,310 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:09:01,311 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:64, output treesize:60 [2019-10-14 23:09:01,483 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 23:09:01,486 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:09:01,487 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 22 [2019-10-14 23:09:01,488 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:09:01,500 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:09:01,501 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-14 23:09:01,502 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:67, output treesize:35 [2019-10-14 23:09:04,657 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:09:04,657 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:09:04,657 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 24 [2019-10-14 23:09:04,657 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973804016] [2019-10-14 23:09:04,658 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 23:09:04,658 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:09:04,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 23:09:04,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=472, Unknown=2, NotChecked=0, Total=552 [2019-10-14 23:09:04,659 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 24 states. [2019-10-14 23:09:05,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:09:05,601 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2019-10-14 23:09:05,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 23:09:05,602 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 35 [2019-10-14 23:09:05,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:09:05,603 INFO L225 Difference]: With dead ends: 62 [2019-10-14 23:09:05,603 INFO L226 Difference]: Without dead ends: 54 [2019-10-14 23:09:05,605 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=196, Invalid=992, Unknown=2, NotChecked=0, Total=1190 [2019-10-14 23:09:05,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-14 23:09:05,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2019-10-14 23:09:05,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 23:09:05,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2019-10-14 23:09:05,613 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 35 [2019-10-14 23:09:05,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:09:05,613 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2019-10-14 23:09:05,613 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 23:09:05,613 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2019-10-14 23:09:05,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-14 23:09:05,617 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:09:05,617 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:09:05,818 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:09:05,818 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:09:05,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:09:05,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1444276590, now seen corresponding path program 2 times [2019-10-14 23:09:05,819 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:09:05,820 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995704735] [2019-10-14 23:09:05,820 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:09:05,820 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:09:05,821 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:09:05,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:09:06,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:09:06,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:09:06,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:09:06,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:09:06,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:09:06,129 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:09:06,130 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995704735] [2019-10-14 23:09:06,130 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952152542] [2019-10-14 23:09:06,130 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:09:06,202 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:09:06,202 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:09:06,203 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 32 conjunts are in the unsatisfiable core [2019-10-14 23:09:06,206 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:09:06,287 INFO L375 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 23 treesize of output 19 [2019-10-14 23:09:06,287 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:09:06,294 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:09:06,294 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:09:06,295 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:42 [2019-10-14 23:09:06,395 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 23:09:06,398 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:09:06,398 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 19 [2019-10-14 23:09:06,399 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:09:06,407 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:09:06,407 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-14 23:09:06,408 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:22 [2019-10-14 23:09:10,210 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:09:10,210 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:09:10,210 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 24 [2019-10-14 23:09:10,210 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348046684] [2019-10-14 23:09:10,211 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 23:09:10,211 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:09:10,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 23:09:10,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=481, Unknown=2, NotChecked=0, Total=552 [2019-10-14 23:09:10,212 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 24 states. [2019-10-14 23:09:17,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:09:17,225 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2019-10-14 23:09:17,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-14 23:09:17,225 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 35 [2019-10-14 23:09:17,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:09:17,227 INFO L225 Difference]: With dead ends: 77 [2019-10-14 23:09:17,227 INFO L226 Difference]: Without dead ends: 69 [2019-10-14 23:09:17,228 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=401, Invalid=2044, Unknown=5, NotChecked=0, Total=2450 [2019-10-14 23:09:17,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-10-14 23:09:17,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 39. [2019-10-14 23:09:17,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-14 23:09:17,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-10-14 23:09:17,237 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 35 [2019-10-14 23:09:17,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:09:17,237 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-10-14 23:09:17,238 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 23:09:17,238 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-10-14 23:09:17,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-14 23:09:17,239 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:09:17,239 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 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] [2019-10-14 23:09:17,452 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:09:17,452 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:09:17,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:09:17,453 INFO L82 PathProgramCache]: Analyzing trace with hash -387236795, now seen corresponding path program 3 times [2019-10-14 23:09:17,453 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:09:17,454 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978690885] [2019-10-14 23:09:17,454 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:09:17,454 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:09:17,455 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:09:17,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:09:17,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:09:17,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:09:17,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:09:17,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:09:17,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:09:17,798 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:09:17,798 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978690885] [2019-10-14 23:09:17,798 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003881431] [2019-10-14 23:09:17,799 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:09:17,868 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 23:09:17,868 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:09:17,870 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 41 conjunts are in the unsatisfiable core [2019-10-14 23:09:17,872 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:09:18,067 INFO L375 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 28 treesize of output 24 [2019-10-14 23:09:18,067 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:09:18,082 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:09:18,083 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-14 23:09:18,083 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:46 [2019-10-14 23:09:20,392 WARN L860 $PredicateComparison]: unable to prove that (exists ((main_~pa~0.offset Int) (v_main_~pd2~0.base_BEFORE_CALL_1 Int) (main_~pd1~0.offset Int) (v_main_~pd2~0.offset_BEFORE_CALL_1 Int)) (and (<= 0 v_main_~pd2~0.offset_BEFORE_CALL_1) (<= main_~pd1~0.offset 0) (= 0 (mod (+ main_~pa~0.offset (* main_~pd1~0.offset 3)) 4)) (<= v_main_~pd2~0.offset_BEFORE_CALL_1 main_~pd1~0.offset) (let ((.cse0 (div (+ main_~pa~0.offset (- main_~pd1~0.offset) (- 8)) 4))) (= .cse0 (select (select |c_#memory_int| v_main_~pd2~0.base_BEFORE_CALL_1) (+ (* .cse0 4) v_main_~pd2~0.offset_BEFORE_CALL_1 8)))))) is different from true [2019-10-14 23:09:26,509 WARN L191 SmtUtils]: Spent 6.04 s on a formula simplification that was a NOOP. DAG size: 43 [2019-10-14 23:09:26,694 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:09:26,732 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 23:09:26,733 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:09:26,733 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 33 [2019-10-14 23:09:26,733 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043337929] [2019-10-14 23:09:26,734 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-14 23:09:26,734 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:09:26,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-14 23:09:26,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=907, Unknown=1, NotChecked=60, Total=1056 [2019-10-14 23:09:26,735 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 33 states.