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/array-crafted/zero_sum_const_m2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:42:41,884 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:42:41,887 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:42:41,904 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:42:41,904 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:42:41,906 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:42:41,908 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:42:41,917 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:42:41,921 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:42:41,923 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:42:41,925 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:42:41,927 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:42:41,927 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:42:41,930 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:42:41,932 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:42:41,934 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:42:41,935 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:42:41,937 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:42:41,938 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:42:41,943 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:42:41,947 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:42:41,950 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:42:41,952 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:42:41,953 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:42:41,955 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 17:42:41,955 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 17:42:41,955 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 17:42:41,957 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 17:42:41,958 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 17:42:41,959 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 17:42:41,960 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:42:41,960 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:42:41,961 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:42:41,962 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:42:41,963 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:42:41,964 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:42:41,964 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:42:41,964 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:42:41,965 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:42:41,965 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:42:41,967 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:42:41,967 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 [2019-10-13 17:42:41,999 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:42:41,999 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:42:42,000 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:42:42,001 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:42:42,001 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:42:42,001 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:42:42,001 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:42:42,002 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:42:42,002 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:42:42,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:42:42,002 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:42:42,002 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:42:42,003 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:42:42,003 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:42:42,003 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:42:42,003 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:42:42,003 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:42:42,004 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:42:42,004 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:42:42,004 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:42:42,004 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:42:42,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:42:42,005 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:42:42,005 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:42:42,005 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:42:42,005 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:42:42,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:42:42,006 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:42:42,006 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:42:42,296 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:42:42,309 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:42:42,312 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:42:42,314 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:42:42,314 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:42:42,315 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const_m2.c [2019-10-13 17:42:42,388 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17827917a/b5f1ce0c743b43a18d5c1e9be3b647c5/FLAGf0a5f8934 [2019-10-13 17:42:42,877 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:42:42,877 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const_m2.c [2019-10-13 17:42:42,885 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17827917a/b5f1ce0c743b43a18d5c1e9be3b647c5/FLAGf0a5f8934 [2019-10-13 17:42:43,242 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17827917a/b5f1ce0c743b43a18d5c1e9be3b647c5 [2019-10-13 17:42:43,252 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:42:43,254 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:42:43,255 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:42:43,255 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:42:43,259 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:42:43,260 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:42:43" (1/1) ... [2019-10-13 17:42:43,263 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3306400a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:43, skipping insertion in model container [2019-10-13 17:42:43,263 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:42:43" (1/1) ... [2019-10-13 17:42:43,271 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:42:43,289 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:42:43,472 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:42:43,490 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:42:43,507 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:42:43,521 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:42:43,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:43 WrapperNode [2019-10-13 17:42:43,522 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:42:43,522 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:42:43,523 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:42:43,523 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:42:43,615 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:43" (1/1) ... [2019-10-13 17:42:43,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:43" (1/1) ... [2019-10-13 17:42:43,623 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:43" (1/1) ... [2019-10-13 17:42:43,623 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:43" (1/1) ... [2019-10-13 17:42:43,632 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:43" (1/1) ... [2019-10-13 17:42:43,638 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:43" (1/1) ... [2019-10-13 17:42:43,640 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:43" (1/1) ... [2019-10-13 17:42:43,642 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:42:43,643 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:42:43,643 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:42:43,643 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:42:43,644 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:43" (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 [2019-10-13 17:42:43,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:42:43,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:42:43,704 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 17:42:43,705 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:42:43,705 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:42:43,705 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 17:42:43,705 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 17:42:43,705 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2019-10-13 17:42:43,705 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 17:42:43,705 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:42:43,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 17:42:43,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 17:42:43,706 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 17:42:43,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:42:43,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:42:43,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 17:42:44,004 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:42:44,004 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-13 17:42:44,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:42:44 BoogieIcfgContainer [2019-10-13 17:42:44,006 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:42:44,013 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:42:44,013 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:42:44,017 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:42:44,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:42:43" (1/3) ... [2019-10-13 17:42:44,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@571a14c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:42:44, skipping insertion in model container [2019-10-13 17:42:44,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:43" (2/3) ... [2019-10-13 17:42:44,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@571a14c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:42:44, skipping insertion in model container [2019-10-13 17:42:44,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:42:44" (3/3) ... [2019-10-13 17:42:44,020 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m2.c [2019-10-13 17:42:44,032 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:42:44,039 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:42:44,050 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:42:44,074 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:42:44,075 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:42:44,075 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:42:44,075 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:42:44,075 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:42:44,075 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:42:44,075 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:42:44,075 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:42:44,091 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-10-13 17:42:44,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-13 17:42:44,097 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:44,098 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:44,099 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:44,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:44,104 INFO L82 PathProgramCache]: Analyzing trace with hash -720839896, now seen corresponding path program 1 times [2019-10-13 17:42:44,111 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:44,111 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056405027] [2019-10-13 17:42:44,112 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:44,112 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:44,112 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:44,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:44,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:44,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:42:44,307 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056405027] [2019-10-13 17:42:44,308 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:42:44,309 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 17:42:44,309 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48854794] [2019-10-13 17:42:44,314 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:42:44,314 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:44,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:42:44,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:42:44,332 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2019-10-13 17:42:44,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:44,460 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2019-10-13 17:42:44,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:42:44,462 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2019-10-13 17:42:44,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:44,472 INFO L225 Difference]: With dead ends: 57 [2019-10-13 17:42:44,472 INFO L226 Difference]: Without dead ends: 26 [2019-10-13 17:42:44,476 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:42:44,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-13 17:42:44,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-13 17:42:44,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-13 17:42:44,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-10-13 17:42:44,521 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 20 [2019-10-13 17:42:44,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:44,521 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-10-13 17:42:44,521 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:42:44,522 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-10-13 17:42:44,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-13 17:42:44,523 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:44,523 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:44,524 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:44,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:44,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1191176598, now seen corresponding path program 1 times [2019-10-13 17:42:44,525 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:44,525 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146810622] [2019-10-13 17:42:44,525 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:44,526 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:44,526 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:44,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:44,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:44,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:42:44,692 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146810622] [2019-10-13 17:42:44,693 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:42:44,694 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 17:42:44,694 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3548748] [2019-10-13 17:42:44,697 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 17:42:44,697 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:44,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 17:42:44,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:42:44,699 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 6 states. [2019-10-13 17:42:44,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:44,879 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2019-10-13 17:42:44,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:42:44,880 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2019-10-13 17:42:44,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:44,881 INFO L225 Difference]: With dead ends: 38 [2019-10-13 17:42:44,881 INFO L226 Difference]: Without dead ends: 33 [2019-10-13 17:42:44,882 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:42:44,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-13 17:42:44,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-10-13 17:42:44,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-13 17:42:44,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2019-10-13 17:42:44,893 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 20 [2019-10-13 17:42:44,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:44,894 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2019-10-13 17:42:44,894 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 17:42:44,894 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2019-10-13 17:42:44,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-13 17:42:44,895 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:44,895 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:44,896 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:44,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:44,896 INFO L82 PathProgramCache]: Analyzing trace with hash -988852588, now seen corresponding path program 1 times [2019-10-13 17:42:44,897 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:44,897 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468962920] [2019-10-13 17:42:44,897 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:44,897 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:44,897 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:44,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:44,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:44,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:42:44,998 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468962920] [2019-10-13 17:42:44,999 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:42:44,999 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:42:44,999 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154972077] [2019-10-13 17:42:45,000 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:42:45,000 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:45,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:42:45,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:42:45,001 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 4 states. [2019-10-13 17:42:45,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:45,108 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2019-10-13 17:42:45,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:42:45,109 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2019-10-13 17:42:45,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:45,110 INFO L225 Difference]: With dead ends: 59 [2019-10-13 17:42:45,110 INFO L226 Difference]: Without dead ends: 35 [2019-10-13 17:42:45,111 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:42:45,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-13 17:42:45,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-10-13 17:42:45,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-13 17:42:45,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2019-10-13 17:42:45,119 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 22 [2019-10-13 17:42:45,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:45,120 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2019-10-13 17:42:45,120 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:42:45,120 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2019-10-13 17:42:45,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-13 17:42:45,122 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:45,122 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:45,122 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:45,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:45,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1991586542, now seen corresponding path program 1 times [2019-10-13 17:42:45,125 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:45,125 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427149106] [2019-10-13 17:42:45,125 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:45,125 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:45,126 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:45,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:45,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:45,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 17:42:45,222 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427149106] [2019-10-13 17:42:45,222 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:42:45,222 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 17:42:45,223 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701847328] [2019-10-13 17:42:45,223 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:42:45,223 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:45,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:42:45,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:42:45,224 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 5 states. [2019-10-13 17:42:45,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:45,361 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2019-10-13 17:42:45,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:42:45,362 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2019-10-13 17:42:45,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:45,363 INFO L225 Difference]: With dead ends: 55 [2019-10-13 17:42:45,363 INFO L226 Difference]: Without dead ends: 36 [2019-10-13 17:42:45,364 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:42:45,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-13 17:42:45,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2019-10-13 17:42:45,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-13 17:42:45,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2019-10-13 17:42:45,377 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 24 [2019-10-13 17:42:45,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:45,379 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2019-10-13 17:42:45,379 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:42:45,380 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2019-10-13 17:42:45,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-13 17:42:45,381 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:45,381 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:45,381 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:45,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:45,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1169709580, now seen corresponding path program 1 times [2019-10-13 17:42:45,382 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:45,383 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86042687] [2019-10-13 17:42:45,384 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:45,384 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:45,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:45,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:45,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:45,501 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 17:42:45,502 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86042687] [2019-10-13 17:42:45,502 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36152500] [2019-10-13 17:42:45,502 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 [2019-10-13 17:42:45,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:45,564 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:42:45,572 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:42:45,623 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 17:42:45,624 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:42:45,624 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-10-13 17:42:45,624 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79081374] [2019-10-13 17:42:45,625 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 17:42:45,625 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:45,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 17:42:45,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:42:45,626 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 7 states. [2019-10-13 17:42:45,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:45,760 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2019-10-13 17:42:45,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:42:45,761 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2019-10-13 17:42:45,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:45,762 INFO L225 Difference]: With dead ends: 55 [2019-10-13 17:42:45,762 INFO L226 Difference]: Without dead ends: 34 [2019-10-13 17:42:45,763 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:42:45,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-13 17:42:45,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-10-13 17:42:45,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-13 17:42:45,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-10-13 17:42:45,771 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 30 [2019-10-13 17:42:45,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:45,772 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-10-13 17:42:45,772 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 17:42:45,772 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-10-13 17:42:45,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-13 17:42:45,773 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:45,773 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, 1] [2019-10-13 17:42:45,977 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:42:45,977 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:45,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:45,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1195670154, now seen corresponding path program 2 times [2019-10-13 17:42:45,978 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:45,978 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083187864] [2019-10-13 17:42:45,978 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:45,979 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:45,979 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:46,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:46,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:46,097 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 17:42:46,097 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083187864] [2019-10-13 17:42:46,098 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316652413] [2019-10-13 17:42:46,098 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 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 [2019-10-13 17:42:46,155 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:42:46,155 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:42:46,157 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:42:46,159 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:42:46,192 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 17:42:46,192 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:42:46,193 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2019-10-13 17:42:46,193 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322060584] [2019-10-13 17:42:46,194 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 17:42:46,194 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:46,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 17:42:46,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:42:46,195 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 8 states. [2019-10-13 17:42:46,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:46,387 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2019-10-13 17:42:46,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 17:42:46,388 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2019-10-13 17:42:46,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:46,389 INFO L225 Difference]: With dead ends: 63 [2019-10-13 17:42:46,389 INFO L226 Difference]: Without dead ends: 46 [2019-10-13 17:42:46,390 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-10-13 17:42:46,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-13 17:42:46,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2019-10-13 17:42:46,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-13 17:42:46,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2019-10-13 17:42:46,399 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 32 [2019-10-13 17:42:46,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:46,399 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2019-10-13 17:42:46,399 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 17:42:46,400 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2019-10-13 17:42:46,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-13 17:42:46,401 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:46,401 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:46,601 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:42:46,602 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:46,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:46,603 INFO L82 PathProgramCache]: Analyzing trace with hash -187044094, now seen corresponding path program 3 times [2019-10-13 17:42:46,604 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:46,604 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042072953] [2019-10-13 17:42:46,605 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:46,605 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:46,605 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:46,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:47,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:48,002 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:42:48,003 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042072953] [2019-10-13 17:42:48,003 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315299930] [2019-10-13 17:42:48,003 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 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 [2019-10-13 17:42:48,058 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-13 17:42:48,058 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:42:48,060 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 54 conjunts are in the unsatisfiable core [2019-10-13 17:42:48,064 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:42:48,191 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 15 treesize of output 11 [2019-10-13 17:42:48,191 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:42:48,201 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:42:48,202 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:42:48,202 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:24 [2019-10-13 17:42:50,381 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-13 17:42:50,391 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:42:50,392 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 36 [2019-10-13 17:42:50,393 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:42:50,438 INFO L567 ElimStorePlain]: treesize reduction 15, result has 71.7 percent of original size [2019-10-13 17:42:50,439 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:42:50,443 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:42:50,444 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:49, output treesize:35 [2019-10-13 17:42:50,530 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:42:50,632 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:42:50,662 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:42:50,772 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:42:50,773 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:42:50,773 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 31] total 53 [2019-10-13 17:42:50,773 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483551928] [2019-10-13 17:42:50,774 INFO L442 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-10-13 17:42:50,774 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:50,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-10-13 17:42:50,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=2577, Unknown=0, NotChecked=0, Total=2756 [2019-10-13 17:42:50,776 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 53 states. [2019-10-13 17:42:54,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:54,049 INFO L93 Difference]: Finished difference Result 98 states and 110 transitions. [2019-10-13 17:42:54,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-10-13 17:42:54,050 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 40 [2019-10-13 17:42:54,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:54,053 INFO L225 Difference]: With dead ends: 98 [2019-10-13 17:42:54,053 INFO L226 Difference]: Without dead ends: 92 [2019-10-13 17:42:54,056 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=305, Invalid=4525, Unknown=0, NotChecked=0, Total=4830 [2019-10-13 17:42:54,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-10-13 17:42:54,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 58. [2019-10-13 17:42:54,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-10-13 17:42:54,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2019-10-13 17:42:54,076 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 40 [2019-10-13 17:42:54,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:54,077 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2019-10-13 17:42:54,077 INFO L463 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-10-13 17:42:54,077 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2019-10-13 17:42:54,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-13 17:42:54,081 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:54,081 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:54,297 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:42:54,298 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:54,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:54,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1685956864, now seen corresponding path program 4 times [2019-10-13 17:42:54,299 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:54,299 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044680732] [2019-10-13 17:42:54,299 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:54,300 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:54,300 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:54,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:54,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:54,434 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 17:42:54,435 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044680732] [2019-10-13 17:42:54,435 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347262831] [2019-10-13 17:42:54,435 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2019-10-13 17:42:54,490 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:42:54,491 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:42:54,492 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 17:42:54,494 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:42:54,544 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 17:42:54,545 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:42:54,545 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2019-10-13 17:42:54,545 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095736152] [2019-10-13 17:42:54,546 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 17:42:54,546 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:54,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 17:42:54,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:42:54,547 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand 14 states. [2019-10-13 17:42:54,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:54,867 INFO L93 Difference]: Finished difference Result 125 states and 141 transitions. [2019-10-13 17:42:54,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 17:42:54,868 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2019-10-13 17:42:54,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:54,871 INFO L225 Difference]: With dead ends: 125 [2019-10-13 17:42:54,872 INFO L226 Difference]: Without dead ends: 75 [2019-10-13 17:42:54,873 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:42:54,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-10-13 17:42:54,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2019-10-13 17:42:54,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-13 17:42:54,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2019-10-13 17:42:54,882 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 42 [2019-10-13 17:42:54,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:54,883 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2019-10-13 17:42:54,883 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 17:42:54,883 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2019-10-13 17:42:54,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-13 17:42:54,884 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:54,884 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:55,099 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:42:55,100 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:55,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:55,101 INFO L82 PathProgramCache]: Analyzing trace with hash 19991870, now seen corresponding path program 5 times [2019-10-13 17:42:55,101 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:55,102 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973714849] [2019-10-13 17:42:55,102 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:55,102 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:55,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:55,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:55,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:55,190 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 17:42:55,191 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973714849] [2019-10-13 17:42:55,191 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41480752] [2019-10-13 17:42:55,191 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2019-10-13 17:42:55,260 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-13 17:42:55,261 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:42:55,262 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 17:42:55,264 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:42:55,334 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 17:42:55,334 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:42:55,334 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2019-10-13 17:42:55,335 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696242586] [2019-10-13 17:42:55,335 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 17:42:55,335 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:55,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 17:42:55,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:42:55,336 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand 14 states. [2019-10-13 17:42:55,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:55,650 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2019-10-13 17:42:55,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 17:42:55,650 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2019-10-13 17:42:55,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:55,652 INFO L225 Difference]: With dead ends: 72 [2019-10-13 17:42:55,652 INFO L226 Difference]: Without dead ends: 55 [2019-10-13 17:42:55,653 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:42:55,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-13 17:42:55,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2019-10-13 17:42:55,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-13 17:42:55,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2019-10-13 17:42:55,660 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 44 [2019-10-13 17:42:55,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:55,661 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2019-10-13 17:42:55,661 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 17:42:55,661 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2019-10-13 17:42:55,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-13 17:42:55,662 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:55,662 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:55,865 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:42:55,866 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:55,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:55,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1936263288, now seen corresponding path program 6 times [2019-10-13 17:42:55,867 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:55,867 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700027882] [2019-10-13 17:42:55,868 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:55,868 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:55,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:55,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:56,966 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2019-10-13 17:42:57,154 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2019-10-13 17:42:57,672 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2019-10-13 17:42:57,814 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2019-10-13 17:43:00,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:00,285 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:43:00,286 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700027882] [2019-10-13 17:43:00,286 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037217535] [2019-10-13 17:43:00,286 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-10-13 17:43:00,346 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-10-13 17:43:00,346 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:00,349 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 70 conjunts are in the unsatisfiable core [2019-10-13 17:43:00,352 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:00,465 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 15 treesize of output 11 [2019-10-13 17:43:00,466 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:43:00,473 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:43:00,474 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:43:00,474 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2019-10-13 17:43:02,821 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:43:02,823 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-13 17:43:02,824 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:43:02,848 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:43:02,849 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 40 treesize of output 59 [2019-10-13 17:43:02,850 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:43:02,851 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:43:02,851 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:43:02,852 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:43:02,853 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:43:02,853 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:43:02,854 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:43:02,854 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:43:02,855 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:43:02,856 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2019-10-13 17:43:02,899 INFO L567 ElimStorePlain]: treesize reduction 46, result has 37.0 percent of original size [2019-10-13 17:43:02,900 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. [2019-10-13 17:43:02,900 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:54, output treesize:22 [2019-10-13 17:43:02,965 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:43:03,073 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:43:03,102 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:43:03,244 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:43:03,245 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:03,245 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 36] total 77 [2019-10-13 17:43:03,245 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181106862] [2019-10-13 17:43:03,246 INFO L442 AbstractCegarLoop]: Interpolant automaton has 77 states [2019-10-13 17:43:03,246 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:03,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2019-10-13 17:43:03,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=571, Invalid=5281, Unknown=0, NotChecked=0, Total=5852 [2019-10-13 17:43:03,248 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 77 states. [2019-10-13 17:43:06,548 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 32 [2019-10-13 17:43:06,792 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 42 [2019-10-13 17:43:07,596 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 41 [2019-10-13 17:43:07,965 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 37 [2019-10-13 17:43:13,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:13,171 INFO L93 Difference]: Finished difference Result 132 states and 148 transitions. [2019-10-13 17:43:13,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-10-13 17:43:13,171 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 50 [2019-10-13 17:43:13,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:13,173 INFO L225 Difference]: With dead ends: 132 [2019-10-13 17:43:13,173 INFO L226 Difference]: Without dead ends: 100 [2019-10-13 17:43:13,179 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5250 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=1564, Invalid=14186, Unknown=0, NotChecked=0, Total=15750 [2019-10-13 17:43:13,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-10-13 17:43:13,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 86. [2019-10-13 17:43:13,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-10-13 17:43:13,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2019-10-13 17:43:13,193 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 50 [2019-10-13 17:43:13,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:13,193 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2019-10-13 17:43:13,193 INFO L463 AbstractCegarLoop]: Interpolant automaton has 77 states. [2019-10-13 17:43:13,194 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2019-10-13 17:43:13,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-13 17:43:13,194 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:13,195 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:13,397 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:13,398 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:13,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:13,399 INFO L82 PathProgramCache]: Analyzing trace with hash 155810740, now seen corresponding path program 7 times [2019-10-13 17:43:13,399 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:13,400 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080519808] [2019-10-13 17:43:13,400 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:13,400 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:13,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:13,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:13,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:13,574 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 17:43:13,578 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080519808] [2019-10-13 17:43:13,579 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834897458] [2019-10-13 17:43:13,579 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:13,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:13,660 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 17:43:13,676 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:13,774 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 17:43:13,775 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:13,775 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2019-10-13 17:43:13,776 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048171729] [2019-10-13 17:43:13,777 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-13 17:43:13,777 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:13,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-13 17:43:13,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2019-10-13 17:43:13,778 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand 17 states. [2019-10-13 17:43:14,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:14,359 INFO L93 Difference]: Finished difference Result 151 states and 167 transitions. [2019-10-13 17:43:14,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 17:43:14,359 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 54 [2019-10-13 17:43:14,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:14,360 INFO L225 Difference]: With dead ends: 151 [2019-10-13 17:43:14,360 INFO L226 Difference]: Without dead ends: 105 [2019-10-13 17:43:14,362 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2019-10-13 17:43:14,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-10-13 17:43:14,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 88. [2019-10-13 17:43:14,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-10-13 17:43:14,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2019-10-13 17:43:14,386 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 54 [2019-10-13 17:43:14,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:14,387 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2019-10-13 17:43:14,387 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-13 17:43:14,387 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2019-10-13 17:43:14,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-13 17:43:14,388 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:14,393 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:14,594 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:14,595 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:14,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:14,596 INFO L82 PathProgramCache]: Analyzing trace with hash 2146716148, now seen corresponding path program 8 times [2019-10-13 17:43:14,596 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:14,597 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689360079] [2019-10-13 17:43:14,597 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:14,597 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:14,598 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:14,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:14,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:14,709 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-13 17:43:14,709 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689360079] [2019-10-13 17:43:14,709 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390033065] [2019-10-13 17:43:14,709 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:14,765 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:43:14,766 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:14,766 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 17:43:14,768 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:14,823 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-13 17:43:14,823 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:14,823 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 18 [2019-10-13 17:43:14,823 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403108234] [2019-10-13 17:43:14,824 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-13 17:43:14,824 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:14,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-13 17:43:14,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:43:14,824 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand 18 states. [2019-10-13 17:43:15,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:15,172 INFO L93 Difference]: Finished difference Result 137 states and 148 transitions. [2019-10-13 17:43:15,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-13 17:43:15,172 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 54 [2019-10-13 17:43:15,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:15,173 INFO L225 Difference]: With dead ends: 137 [2019-10-13 17:43:15,173 INFO L226 Difference]: Without dead ends: 66 [2019-10-13 17:43:15,175 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2019-10-13 17:43:15,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-10-13 17:43:15,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2019-10-13 17:43:15,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-13 17:43:15,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2019-10-13 17:43:15,183 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 54 [2019-10-13 17:43:15,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:15,183 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2019-10-13 17:43:15,183 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-13 17:43:15,183 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2019-10-13 17:43:15,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-13 17:43:15,184 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:15,184 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:15,388 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:15,388 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:15,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:15,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1133377938, now seen corresponding path program 9 times [2019-10-13 17:43:15,389 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:15,391 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161710121] [2019-10-13 17:43:15,391 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:15,391 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:15,391 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:15,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:16,598 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2019-10-13 17:43:16,756 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2019-10-13 17:43:16,917 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2019-10-13 17:43:17,092 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2019-10-13 17:43:17,255 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2019-10-13 17:43:17,670 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 44 [2019-10-13 17:43:17,845 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2019-10-13 17:43:18,026 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2019-10-13 17:43:18,246 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2019-10-13 17:43:18,461 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2019-10-13 17:43:18,689 WARN L191 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2019-10-13 17:43:18,878 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2019-10-13 17:43:19,068 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2019-10-13 17:43:19,230 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2019-10-13 17:43:19,559 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2019-10-13 17:43:19,731 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2019-10-13 17:43:19,899 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2019-10-13 17:43:20,075 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2019-10-13 17:43:20,264 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2019-10-13 17:43:20,452 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2019-10-13 17:43:20,649 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2019-10-13 17:43:21,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:22,010 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 2 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:43:22,011 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161710121] [2019-10-13 17:43:22,011 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122113335] [2019-10-13 17:43:22,011 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:22,111 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-13 17:43:22,111 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:22,113 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 86 conjunts are in the unsatisfiable core [2019-10-13 17:43:22,125 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:22,164 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 15 treesize of output 11 [2019-10-13 17:43:22,165 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:43:22,171 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:43:22,171 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:43:22,172 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21