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/loops/eureka_01-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:16:05,011 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:16:05,014 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:16:05,026 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:16:05,026 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:16:05,028 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:16:05,029 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:16:05,031 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:16:05,032 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:16:05,033 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:16:05,034 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:16:05,035 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:16:05,036 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:16:05,037 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:16:05,037 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:16:05,039 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:16:05,039 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:16:05,040 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:16:05,042 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:16:05,044 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:16:05,045 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:16:05,046 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:16:05,047 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:16:05,048 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:16:05,050 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:16:05,053 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:16:05,054 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:16:05,055 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:16:05,056 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:16:05,057 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:16:05,057 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:16:05,058 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:16:05,060 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:16:05,060 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:16:05,062 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:16:05,062 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:16:05,063 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 23:16:05,087 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:16:05,088 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:16:05,089 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:16:05,090 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:16:05,090 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:16:05,090 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:16:05,090 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:16:05,091 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:16:05,091 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:16:05,091 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:16:05,091 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:16:05,091 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:16:05,092 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:16:05,092 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:16:05,092 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:16:05,092 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:16:05,092 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:16:05,093 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:16:05,093 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:16:05,093 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:16:05,093 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:16:05,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:16:05,096 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:16:05,096 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:16:05,096 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:16:05,096 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:16:05,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:16:05,097 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:16:05,097 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:16:05,378 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:16:05,391 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:16:05,395 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:16:05,397 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:16:05,397 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:16:05,398 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/eureka_01-2.c [2019-10-14 23:16:05,463 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2fc75916/98076657cbd646ddb95bf7ed60ef24cc/FLAGd5e2e8776 [2019-10-14 23:16:05,942 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:16:05,943 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/eureka_01-2.c [2019-10-14 23:16:05,952 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2fc75916/98076657cbd646ddb95bf7ed60ef24cc/FLAGd5e2e8776 [2019-10-14 23:16:06,273 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2fc75916/98076657cbd646ddb95bf7ed60ef24cc [2019-10-14 23:16:06,285 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:16:06,286 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:16:06,287 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:16:06,288 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:16:06,291 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:16:06,292 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:16:06" (1/1) ... [2019-10-14 23:16:06,295 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6226574d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:06, skipping insertion in model container [2019-10-14 23:16:06,296 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:16:06" (1/1) ... [2019-10-14 23:16:06,304 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:16:06,328 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:16:06,597 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:16:06,600 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:16:06,736 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:16:06,759 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:16:06,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:06 WrapperNode [2019-10-14 23:16:06,761 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:16:06,762 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:16:06,762 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:16:06,762 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:16:06,775 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:06" (1/1) ... [2019-10-14 23:16:06,776 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:06" (1/1) ... [2019-10-14 23:16:06,786 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:06" (1/1) ... [2019-10-14 23:16:06,786 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:06" (1/1) ... [2019-10-14 23:16:06,808 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:06" (1/1) ... [2019-10-14 23:16:06,815 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:06" (1/1) ... [2019-10-14 23:16:06,817 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:06" (1/1) ... [2019-10-14 23:16:06,820 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:16:06,821 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:16:06,821 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:16:06,821 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:16:06,822 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:16:06,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:16:06,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:16:06,892 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 23:16:06,892 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:16:06,892 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:16:06,892 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:16:06,892 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:16:06,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 23:16:06,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-14 23:16:06,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 23:16:06,893 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 23:16:06,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 23:16:06,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:16:06,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:16:07,274 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:16:07,274 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-14 23:16:07,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:16:07 BoogieIcfgContainer [2019-10-14 23:16:07,276 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:16:07,277 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:16:07,277 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:16:07,281 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:16:07,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:16:06" (1/3) ... [2019-10-14 23:16:07,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b241b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:16:07, skipping insertion in model container [2019-10-14 23:16:07,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:06" (2/3) ... [2019-10-14 23:16:07,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b241b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:16:07, skipping insertion in model container [2019-10-14 23:16:07,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:16:07" (3/3) ... [2019-10-14 23:16:07,285 INFO L109 eAbstractionObserver]: Analyzing ICFG eureka_01-2.c [2019-10-14 23:16:07,297 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:16:07,306 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:16:07,321 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:16:07,350 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:16:07,350 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:16:07,351 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:16:07,351 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:16:07,351 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:16:07,351 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:16:07,351 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:16:07,351 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:16:07,374 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-10-14 23:16:07,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 23:16:07,382 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:07,383 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:07,386 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:07,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:07,393 INFO L82 PathProgramCache]: Analyzing trace with hash 288590464, now seen corresponding path program 1 times [2019-10-14 23:16:07,403 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:07,403 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635557179] [2019-10-14 23:16:07,404 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:07,404 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:07,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:07,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:07,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:07,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:07,657 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635557179] [2019-10-14 23:16:07,658 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:16:07,658 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:16:07,659 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699387997] [2019-10-14 23:16:07,664 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:16:07,665 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:07,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:16:07,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:16:07,693 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2019-10-14 23:16:07,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:07,836 INFO L93 Difference]: Finished difference Result 61 states and 85 transitions. [2019-10-14 23:16:07,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:16:07,838 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-10-14 23:16:07,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:07,848 INFO L225 Difference]: With dead ends: 61 [2019-10-14 23:16:07,848 INFO L226 Difference]: Without dead ends: 30 [2019-10-14 23:16:07,852 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 [2019-10-14 23:16:07,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-14 23:16:07,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-10-14 23:16:07,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-14 23:16:07,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2019-10-14 23:16:07,899 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 17 [2019-10-14 23:16:07,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:07,899 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2019-10-14 23:16:07,899 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:16:07,900 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2019-10-14 23:16:07,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 23:16:07,901 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:07,901 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:07,902 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:07,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:07,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1211863700, now seen corresponding path program 1 times [2019-10-14 23:16:07,903 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:07,904 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460221917] [2019-10-14 23:16:07,904 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:07,904 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:07,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:07,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:08,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:08,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:08,050 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460221917] [2019-10-14 23:16:08,050 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:16:08,050 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:16:08,051 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300369361] [2019-10-14 23:16:08,055 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:16:08,056 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:08,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:16:08,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:16:08,056 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 4 states. [2019-10-14 23:16:08,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:08,206 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2019-10-14 23:16:08,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:16:08,207 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-10-14 23:16:08,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:08,208 INFO L225 Difference]: With dead ends: 54 [2019-10-14 23:16:08,208 INFO L226 Difference]: Without dead ends: 33 [2019-10-14 23:16:08,209 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 [2019-10-14 23:16:08,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-14 23:16:08,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2019-10-14 23:16:08,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-14 23:16:08,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2019-10-14 23:16:08,217 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 17 [2019-10-14 23:16:08,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:08,218 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2019-10-14 23:16:08,218 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:16:08,218 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2019-10-14 23:16:08,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 23:16:08,219 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:08,220 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] [2019-10-14 23:16:08,220 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:08,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:08,221 INFO L82 PathProgramCache]: Analyzing trace with hash 151989727, now seen corresponding path program 1 times [2019-10-14 23:16:08,221 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:08,221 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167192216] [2019-10-14 23:16:08,222 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:08,222 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:08,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:08,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:08,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:08,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:16:08,344 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167192216] [2019-10-14 23:16:08,344 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:16:08,345 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:16:08,345 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894942119] [2019-10-14 23:16:08,345 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:16:08,346 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:08,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:16:08,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:16:08,347 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 5 states. [2019-10-14 23:16:08,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:08,501 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2019-10-14 23:16:08,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:16:08,502 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-10-14 23:16:08,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:08,505 INFO L225 Difference]: With dead ends: 61 [2019-10-14 23:16:08,507 INFO L226 Difference]: Without dead ends: 46 [2019-10-14 23:16:08,507 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:16:08,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-14 23:16:08,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 32. [2019-10-14 23:16:08,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-14 23:16:08,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2019-10-14 23:16:08,532 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 20 [2019-10-14 23:16:08,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:08,533 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2019-10-14 23:16:08,533 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:16:08,533 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2019-10-14 23:16:08,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-14 23:16:08,534 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:08,534 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] [2019-10-14 23:16:08,534 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:08,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:08,535 INFO L82 PathProgramCache]: Analyzing trace with hash -25037678, now seen corresponding path program 1 times [2019-10-14 23:16:08,535 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:08,535 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389456178] [2019-10-14 23:16:08,536 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:08,536 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:08,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:08,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:08,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:08,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:16:08,659 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389456178] [2019-10-14 23:16:08,659 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:16:08,659 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:16:08,660 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951556058] [2019-10-14 23:16:08,660 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:16:08,660 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:08,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:16:08,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:16:08,662 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 5 states. [2019-10-14 23:16:08,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:08,751 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2019-10-14 23:16:08,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:16:08,752 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2019-10-14 23:16:08,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:08,753 INFO L225 Difference]: With dead ends: 55 [2019-10-14 23:16:08,753 INFO L226 Difference]: Without dead ends: 35 [2019-10-14 23:16:08,754 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:16:08,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-14 23:16:08,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-10-14 23:16:08,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-14 23:16:08,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2019-10-14 23:16:08,761 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 23 [2019-10-14 23:16:08,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:08,761 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2019-10-14 23:16:08,761 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:16:08,762 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2019-10-14 23:16:08,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-14 23:16:08,763 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:08,763 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] [2019-10-14 23:16:08,763 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:08,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:08,764 INFO L82 PathProgramCache]: Analyzing trace with hash -651240250, now seen corresponding path program 1 times [2019-10-14 23:16:08,764 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:08,764 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735811886] [2019-10-14 23:16:08,764 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:08,765 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:08,765 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:08,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:08,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:08,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 23:16:08,878 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735811886] [2019-10-14 23:16:08,878 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:16:08,878 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:16:08,879 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895438572] [2019-10-14 23:16:08,880 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:16:08,880 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:08,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:16:08,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:16:08,882 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 5 states. [2019-10-14 23:16:09,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:09,003 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2019-10-14 23:16:09,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:16:09,004 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2019-10-14 23:16:09,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:09,005 INFO L225 Difference]: With dead ends: 58 [2019-10-14 23:16:09,005 INFO L226 Difference]: Without dead ends: 47 [2019-10-14 23:16:09,005 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:16:09,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-14 23:16:09,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2019-10-14 23:16:09,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-14 23:16:09,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2019-10-14 23:16:09,012 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 26 [2019-10-14 23:16:09,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:09,013 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2019-10-14 23:16:09,013 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:16:09,013 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2019-10-14 23:16:09,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-14 23:16:09,014 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:09,014 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] [2019-10-14 23:16:09,014 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:09,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:09,015 INFO L82 PathProgramCache]: Analyzing trace with hash -118036183, now seen corresponding path program 1 times [2019-10-14 23:16:09,015 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:09,015 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219538223] [2019-10-14 23:16:09,016 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:09,016 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:09,016 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:09,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:09,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:09,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 23:16:09,091 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219538223] [2019-10-14 23:16:09,091 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003164189] [2019-10-14 23:16:09,091 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:09,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:09,182 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:16:09,195 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:09,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 23:16:09,291 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:09,292 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-10-14 23:16:09,292 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374338257] [2019-10-14 23:16:09,293 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:16:09,293 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:09,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:16:09,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:16:09,298 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 7 states. [2019-10-14 23:16:09,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:09,440 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2019-10-14 23:16:09,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:16:09,441 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2019-10-14 23:16:09,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:09,446 INFO L225 Difference]: With dead ends: 63 [2019-10-14 23:16:09,447 INFO L226 Difference]: Without dead ends: 39 [2019-10-14 23:16:09,448 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:16:09,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-14 23:16:09,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2019-10-14 23:16:09,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-14 23:16:09,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2019-10-14 23:16:09,464 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 29 [2019-10-14 23:16:09,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:09,464 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2019-10-14 23:16:09,465 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:16:09,466 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2019-10-14 23:16:09,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 23:16:09,467 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:09,467 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:09,678 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:09,679 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:09,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:09,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1251798004, now seen corresponding path program 2 times [2019-10-14 23:16:09,679 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:09,679 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058066188] [2019-10-14 23:16:09,680 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:09,680 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:09,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:09,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:09,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:09,836 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 23:16:09,836 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058066188] [2019-10-14 23:16:09,837 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674138554] [2019-10-14 23:16:09,837 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 [2019-10-14 23:16:09,932 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:16:09,932 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:09,934 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:16:09,936 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:09,979 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 23:16:09,979 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:09,979 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2019-10-14 23:16:09,980 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107089822] [2019-10-14 23:16:09,980 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:16:09,981 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:09,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:16:09,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:16:09,981 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand 4 states. [2019-10-14 23:16:10,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:10,038 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2019-10-14 23:16:10,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:16:10,038 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2019-10-14 23:16:10,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:10,039 INFO L225 Difference]: With dead ends: 75 [2019-10-14 23:16:10,039 INFO L226 Difference]: Without dead ends: 48 [2019-10-14 23:16:10,040 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:16:10,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-14 23:16:10,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2019-10-14 23:16:10,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-14 23:16:10,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2019-10-14 23:16:10,047 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 32 [2019-10-14 23:16:10,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:10,047 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2019-10-14 23:16:10,047 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:16:10,048 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2019-10-14 23:16:10,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 23:16:10,048 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:10,049 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] [2019-10-14 23:16:10,252 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:10,252 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:10,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:10,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1470652722, now seen corresponding path program 1 times [2019-10-14 23:16:10,253 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:10,254 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659486930] [2019-10-14 23:16:10,254 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:10,254 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:10,254 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:10,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:10,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:10,350 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 23:16:10,350 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659486930] [2019-10-14 23:16:10,350 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788260066] [2019-10-14 23:16:10,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:10,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:10,421 INFO L256 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:16:10,424 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:10,461 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 23:16:10,461 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:10,462 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2019-10-14 23:16:10,462 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697942247] [2019-10-14 23:16:10,462 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:16:10,463 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:10,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:16:10,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:16:10,463 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 9 states. [2019-10-14 23:16:10,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:10,575 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2019-10-14 23:16:10,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:16:10,577 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2019-10-14 23:16:10,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:10,577 INFO L225 Difference]: With dead ends: 66 [2019-10-14 23:16:10,578 INFO L226 Difference]: Without dead ends: 42 [2019-10-14 23:16:10,578 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:16:10,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-14 23:16:10,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2019-10-14 23:16:10,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-14 23:16:10,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2019-10-14 23:16:10,589 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 32 [2019-10-14 23:16:10,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:10,590 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2019-10-14 23:16:10,590 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:16:10,590 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2019-10-14 23:16:10,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-14 23:16:10,591 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:10,592 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:10,796 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:10,797 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:10,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:10,798 INFO L82 PathProgramCache]: Analyzing trace with hash -437780343, now seen corresponding path program 2 times [2019-10-14 23:16:10,798 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:10,799 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103584456] [2019-10-14 23:16:10,799 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:10,799 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:10,800 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:10,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:10,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:10,880 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 23:16:10,880 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103584456] [2019-10-14 23:16:10,881 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014472186] [2019-10-14 23:16:10,881 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:10,947 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:16:10,947 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:10,951 INFO L256 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:16:10,956 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:11,017 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 23:16:11,018 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:11,018 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2019-10-14 23:16:11,018 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734628735] [2019-10-14 23:16:11,019 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 23:16:11,019 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:11,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 23:16:11,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:16:11,020 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 11 states. [2019-10-14 23:16:11,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:11,154 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2019-10-14 23:16:11,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:16:11,155 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2019-10-14 23:16:11,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:11,155 INFO L225 Difference]: With dead ends: 69 [2019-10-14 23:16:11,156 INFO L226 Difference]: Without dead ends: 45 [2019-10-14 23:16:11,159 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:16:11,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-14 23:16:11,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2019-10-14 23:16:11,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-14 23:16:11,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2019-10-14 23:16:11,166 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 35 [2019-10-14 23:16:11,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:11,167 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2019-10-14 23:16:11,167 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 23:16:11,167 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2019-10-14 23:16:11,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-14 23:16:11,170 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:11,170 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:11,374 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:11,374 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:11,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:11,375 INFO L82 PathProgramCache]: Analyzing trace with hash -2085122606, now seen corresponding path program 3 times [2019-10-14 23:16:11,375 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:11,376 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482341651] [2019-10-14 23:16:11,376 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:11,376 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:11,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:11,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:11,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:11,498 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 23:16:11,498 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482341651] [2019-10-14 23:16:11,498 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100701545] [2019-10-14 23:16:11,499 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:11,564 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-14 23:16:11,564 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:11,565 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:16:11,567 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:11,604 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-14 23:16:11,605 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:11,605 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 23:16:11,605 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972183357] [2019-10-14 23:16:11,606 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 23:16:11,606 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:11,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 23:16:11,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:16:11,610 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 11 states. [2019-10-14 23:16:11,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:11,878 INFO L93 Difference]: Finished difference Result 129 states and 160 transitions. [2019-10-14 23:16:11,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:16:11,879 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2019-10-14 23:16:11,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:11,881 INFO L225 Difference]: With dead ends: 129 [2019-10-14 23:16:11,881 INFO L226 Difference]: Without dead ends: 105 [2019-10-14 23:16:11,882 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:16:11,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-10-14 23:16:11,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 70. [2019-10-14 23:16:11,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-10-14 23:16:11,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2019-10-14 23:16:11,899 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 38 [2019-10-14 23:16:11,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:11,900 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2019-10-14 23:16:11,900 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 23:16:11,900 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2019-10-14 23:16:11,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-14 23:16:11,905 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:11,905 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:12,115 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:12,115 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:12,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:12,116 INFO L82 PathProgramCache]: Analyzing trace with hash -56202419, now seen corresponding path program 4 times [2019-10-14 23:16:12,117 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:12,117 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739842910] [2019-10-14 23:16:12,117 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:12,118 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:12,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:12,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:12,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:12,250 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 50 proven. 7 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-10-14 23:16:12,251 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739842910] [2019-10-14 23:16:12,251 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009777892] [2019-10-14 23:16:12,251 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:12,418 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:16:12,418 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:12,420 INFO L256 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:16:12,423 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:12,463 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-10-14 23:16:12,463 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:12,464 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2019-10-14 23:16:12,464 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928039444] [2019-10-14 23:16:12,465 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:16:12,465 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:12,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:16:12,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:16:12,466 INFO L87 Difference]: Start difference. First operand 70 states and 84 transitions. Second operand 8 states. [2019-10-14 23:16:12,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:12,570 INFO L93 Difference]: Finished difference Result 137 states and 176 transitions. [2019-10-14 23:16:12,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:16:12,570 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2019-10-14 23:16:12,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:12,572 INFO L225 Difference]: With dead ends: 137 [2019-10-14 23:16:12,572 INFO L226 Difference]: Without dead ends: 95 [2019-10-14 23:16:12,573 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:16:12,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-10-14 23:16:12,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 85. [2019-10-14 23:16:12,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-10-14 23:16:12,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 104 transitions. [2019-10-14 23:16:12,583 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 104 transitions. Word has length 65 [2019-10-14 23:16:12,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:12,584 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 104 transitions. [2019-10-14 23:16:12,584 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:16:12,584 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 104 transitions. [2019-10-14 23:16:12,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-10-14 23:16:12,585 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:12,586 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:12,790 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:12,790 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:12,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:12,791 INFO L82 PathProgramCache]: Analyzing trace with hash 51934813, now seen corresponding path program 5 times [2019-10-14 23:16:12,792 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:12,792 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91649970] [2019-10-14 23:16:12,792 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:12,792 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:12,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:12,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:12,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:12,888 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 73 proven. 5 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2019-10-14 23:16:12,889 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91649970] [2019-10-14 23:16:12,889 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889669568] [2019-10-14 23:16:12,889 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 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 [2019-10-14 23:16:14,945 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-10-14 23:16:14,946 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:14,953 INFO L256 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:16:14,957 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:15,013 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 131 proven. 5 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-10-14 23:16:15,013 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:15,013 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2019-10-14 23:16:15,013 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044144601] [2019-10-14 23:16:15,014 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:16:15,017 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:15,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:16:15,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:16:15,018 INFO L87 Difference]: Start difference. First operand 85 states and 104 transitions. Second operand 10 states. [2019-10-14 23:16:15,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:15,144 INFO L93 Difference]: Finished difference Result 164 states and 212 transitions. [2019-10-14 23:16:15,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:16:15,145 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 80 [2019-10-14 23:16:15,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:15,147 INFO L225 Difference]: With dead ends: 164 [2019-10-14 23:16:15,147 INFO L226 Difference]: Without dead ends: 110 [2019-10-14 23:16:15,148 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:16:15,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-10-14 23:16:15,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 100. [2019-10-14 23:16:15,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-10-14 23:16:15,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 124 transitions. [2019-10-14 23:16:15,158 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 124 transitions. Word has length 80 [2019-10-14 23:16:15,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:15,159 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 124 transitions. [2019-10-14 23:16:15,159 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:16:15,159 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 124 transitions. [2019-10-14 23:16:15,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-14 23:16:15,161 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:15,161 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 15, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:15,372 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:15,373 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:15,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:15,374 INFO L82 PathProgramCache]: Analyzing trace with hash -348661427, now seen corresponding path program 6 times [2019-10-14 23:16:15,374 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:15,375 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193389960] [2019-10-14 23:16:15,375 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:15,375 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:15,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:15,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:15,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:15,488 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 141 proven. 12 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2019-10-14 23:16:15,488 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193389960] [2019-10-14 23:16:15,488 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536942590] [2019-10-14 23:16:15,488 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 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 [2019-10-14 23:16:15,594 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-10-14 23:16:15,594 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:15,596 INFO L256 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:16:15,610 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:15,711 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2019-10-14 23:16:15,712 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:15,712 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 10 [2019-10-14 23:16:15,712 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928827404] [2019-10-14 23:16:15,713 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:16:15,713 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:15,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:16:15,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:16:15,714 INFO L87 Difference]: Start difference. First operand 100 states and 124 transitions. Second operand 10 states. [2019-10-14 23:16:16,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:16,044 INFO L93 Difference]: Finished difference Result 204 states and 264 transitions. [2019-10-14 23:16:16,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 23:16:16,045 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 95 [2019-10-14 23:16:16,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:16,046 INFO L225 Difference]: With dead ends: 204 [2019-10-14 23:16:16,047 INFO L226 Difference]: Without dead ends: 138 [2019-10-14 23:16:16,047 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2019-10-14 23:16:16,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-10-14 23:16:16,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 118. [2019-10-14 23:16:16,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-10-14 23:16:16,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 147 transitions. [2019-10-14 23:16:16,059 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 147 transitions. Word has length 95 [2019-10-14 23:16:16,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:16,060 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 147 transitions. [2019-10-14 23:16:16,060 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:16:16,060 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 147 transitions. [2019-10-14 23:16:16,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-10-14 23:16:16,064 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:16,064 INFO L380 BasicCegarLoop]: trace histogram [20, 20, 20, 5, 5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:16,264 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:16,265 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:16,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:16,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1106095310, now seen corresponding path program 7 times [2019-10-14 23:16:16,267 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:16,267 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080523974] [2019-10-14 23:16:16,267 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:16,267 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:16,268 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:16,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:16,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:16,426 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 233 proven. 22 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2019-10-14 23:16:16,426 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080523974] [2019-10-14 23:16:16,426 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754019398] [2019-10-14 23:16:16,426 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 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 [2019-10-14 23:16:16,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:16,563 INFO L256 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:16:16,566 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:16,667 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 233 proven. 22 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2019-10-14 23:16:16,667 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:16,668 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2019-10-14 23:16:16,668 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841370895] [2019-10-14 23:16:16,668 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 23:16:16,669 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:16,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 23:16:16,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:16:16,669 INFO L87 Difference]: Start difference. First operand 118 states and 147 transitions. Second operand 14 states. [2019-10-14 23:16:16,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:16,775 INFO L93 Difference]: Finished difference Result 224 states and 290 transitions. [2019-10-14 23:16:16,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:16:16,776 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 113 [2019-10-14 23:16:16,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:16,777 INFO L225 Difference]: With dead ends: 224 [2019-10-14 23:16:16,777 INFO L226 Difference]: Without dead ends: 143 [2019-10-14 23:16:16,778 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:16:16,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-10-14 23:16:16,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 133. [2019-10-14 23:16:16,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-10-14 23:16:16,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 167 transitions. [2019-10-14 23:16:16,796 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 167 transitions. Word has length 113 [2019-10-14 23:16:16,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:16,797 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 167 transitions. [2019-10-14 23:16:16,797 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 23:16:16,797 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 167 transitions. [2019-10-14 23:16:16,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-10-14 23:16:16,799 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:16,799 INFO L380 BasicCegarLoop]: trace histogram [25, 25, 25, 5, 5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:17,008 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:17,008 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:17,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:17,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1602790078, now seen corresponding path program 8 times [2019-10-14 23:16:17,009 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:17,010 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626410379] [2019-10-14 23:16:17,010 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:17,010 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:17,011 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:17,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:17,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:17,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1100 backedges. 544 proven. 105 refuted. 0 times theorem prover too weak. 451 trivial. 0 not checked. [2019-10-14 23:16:17,883 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626410379] [2019-10-14 23:16:17,883 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787776591] [2019-10-14 23:16:17,884 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:18,100 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:16:18,101 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:18,104 INFO L256 TraceCheckSpWp]: Trace formula consists of 667 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 23:16:18,109 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:18,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1100 backedges. 349 proven. 35 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2019-10-14 23:16:18,229 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:18,230 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2019-10-14 23:16:18,230 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381258750] [2019-10-14 23:16:18,231 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 23:16:18,231 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:18,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 23:16:18,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:16:18,232 INFO L87 Difference]: Start difference. First operand 133 states and 167 transitions. Second operand 16 states. [2019-10-14 23:16:18,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:18,381 INFO L93 Difference]: Finished difference Result 251 states and 326 transitions. [2019-10-14 23:16:18,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:16:18,382 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 128 [2019-10-14 23:16:18,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:18,383 INFO L225 Difference]: With dead ends: 251 [2019-10-14 23:16:18,383 INFO L226 Difference]: Without dead ends: 158 [2019-10-14 23:16:18,384 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:16:18,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2019-10-14 23:16:18,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 148. [2019-10-14 23:16:18,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-10-14 23:16:18,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 187 transitions. [2019-10-14 23:16:18,398 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 187 transitions. Word has length 128 [2019-10-14 23:16:18,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:18,398 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 187 transitions. [2019-10-14 23:16:18,398 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 23:16:18,398 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 187 transitions. [2019-10-14 23:16:18,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-10-14 23:16:18,400 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:18,400 INFO L380 BasicCegarLoop]: trace histogram [30, 30, 30, 5, 5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:18,609 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:18,609 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:18,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:18,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1781076530, now seen corresponding path program 9 times [2019-10-14 23:16:18,610 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:18,610 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633552419] [2019-10-14 23:16:18,610 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:18,610 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:18,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:18,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:18,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:18,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1530 backedges. 489 proven. 51 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2019-10-14 23:16:18,794 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633552419] [2019-10-14 23:16:18,794 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447617618] [2019-10-14 23:16:18,794 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:18,891 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 23:16:18,891 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:18,893 INFO L256 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:16:18,898 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:18,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1530 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1525 trivial. 0 not checked. [2019-10-14 23:16:18,968 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:18,968 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 14 [2019-10-14 23:16:18,969 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250933173] [2019-10-14 23:16:18,969 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 23:16:18,969 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:18,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 23:16:18,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:16:18,970 INFO L87 Difference]: Start difference. First operand 148 states and 187 transitions. Second operand 14 states. [2019-10-14 23:16:19,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:19,715 INFO L93 Difference]: Finished difference Result 295 states and 383 transitions. [2019-10-14 23:16:19,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-10-14 23:16:19,715 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 143 [2019-10-14 23:16:19,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:19,717 INFO L225 Difference]: With dead ends: 295 [2019-10-14 23:16:19,717 INFO L226 Difference]: Without dead ends: 190 [2019-10-14 23:16:19,718 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=530, Invalid=1110, Unknown=0, NotChecked=0, Total=1640 [2019-10-14 23:16:19,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2019-10-14 23:16:19,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 166. [2019-10-14 23:16:19,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2019-10-14 23:16:19,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 210 transitions. [2019-10-14 23:16:19,728 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 210 transitions. Word has length 143 [2019-10-14 23:16:19,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:19,729 INFO L462 AbstractCegarLoop]: Abstraction has 166 states and 210 transitions. [2019-10-14 23:16:19,729 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 23:16:19,729 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 210 transitions. [2019-10-14 23:16:19,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-14 23:16:19,731 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:19,731 INFO L380 BasicCegarLoop]: trace histogram [35, 35, 35, 5, 5, 5, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:19,935 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:19,936 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:19,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:19,936 INFO L82 PathProgramCache]: Analyzing trace with hash 775566637, now seen corresponding path program 10 times [2019-10-14 23:16:19,936 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:19,937 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558687312] [2019-10-14 23:16:19,937 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:19,937 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:19,937 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:20,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:20,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:20,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2042 backedges. 653 proven. 70 refuted. 0 times theorem prover too weak. 1319 trivial. 0 not checked. [2019-10-14 23:16:20,147 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558687312] [2019-10-14 23:16:20,147 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852436760] [2019-10-14 23:16:20,148 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:20,298 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:16:20,299 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:20,301 INFO L256 TraceCheckSpWp]: Trace formula consists of 670 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 23:16:20,305 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:20,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2042 backedges. 56 proven. 591 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2019-10-14 23:16:20,539 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:20,540 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2019-10-14 23:16:20,540 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40677288] [2019-10-14 23:16:20,541 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 23:16:20,541 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:20,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 23:16:20,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2019-10-14 23:16:20,542 INFO L87 Difference]: Start difference. First operand 166 states and 210 transitions. Second operand 24 states. [2019-10-14 23:16:22,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:22,228 INFO L93 Difference]: Finished difference Result 332 states and 430 transitions. [2019-10-14 23:16:22,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-10-14 23:16:22,229 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 161 [2019-10-14 23:16:22,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:22,231 INFO L225 Difference]: With dead ends: 332 [2019-10-14 23:16:22,231 INFO L226 Difference]: Without dead ends: 212 [2019-10-14 23:16:22,234 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1344 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1008, Invalid=4104, Unknown=0, NotChecked=0, Total=5112 [2019-10-14 23:16:22,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2019-10-14 23:16:22,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 184. [2019-10-14 23:16:22,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2019-10-14 23:16:22,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 233 transitions. [2019-10-14 23:16:22,248 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 233 transitions. Word has length 161 [2019-10-14 23:16:22,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:22,249 INFO L462 AbstractCegarLoop]: Abstraction has 184 states and 233 transitions. [2019-10-14 23:16:22,249 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 23:16:22,249 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 233 transitions. [2019-10-14 23:16:22,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-10-14 23:16:22,251 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:22,251 INFO L380 BasicCegarLoop]: trace histogram [40, 40, 40, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:22,462 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:22,463 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:22,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:22,464 INFO L82 PathProgramCache]: Analyzing trace with hash -803794606, now seen corresponding path program 11 times [2019-10-14 23:16:22,464 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:22,464 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140397292] [2019-10-14 23:16:22,465 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:22,465 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:22,465 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:22,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:22,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:22,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2632 backedges. 841 proven. 92 refuted. 0 times theorem prover too weak. 1699 trivial. 0 not checked. [2019-10-14 23:16:22,699 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140397292] [2019-10-14 23:16:22,699 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664318093] [2019-10-14 23:16:22,700 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true