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/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:43:38,909 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:43:38,911 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:43:38,931 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:43:38,932 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:43:38,934 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:43:38,936 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:43:38,949 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:43:38,951 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:43:38,952 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:43:38,953 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:43:38,954 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:43:38,954 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:43:38,955 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:43:38,956 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:43:38,957 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:43:38,958 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:43:38,959 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:43:38,960 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:43:38,962 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:43:38,963 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:43:38,964 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:43:38,965 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:43:38,966 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:43:38,968 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:43:38,972 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:43:38,972 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:43:38,973 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:43:38,974 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:43:38,975 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:43:38,975 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:43:38,976 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:43:38,976 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:43:38,976 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:43:38,977 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:43:38,978 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:43:38,979 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 23:43:38,993 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:43:38,994 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:43:38,995 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:43:38,995 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:43:38,995 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:43:38,996 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:43:38,996 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:43:38,996 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:43:38,996 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:43:38,996 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:43:38,996 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:43:38,997 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:43:38,997 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:43:38,997 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:43:38,997 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:43:38,997 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:43:38,998 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:43:38,998 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:43:38,998 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:43:38,998 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:43:38,998 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:43:38,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:43:38,999 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:43:38,999 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:43:38,999 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:43:38,999 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:43:39,000 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:43:39,000 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:43:39,000 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:43:39,317 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:43:39,333 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:43:39,336 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:43:39,338 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:43:39,338 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:43:39,339 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2019-10-14 23:43:39,402 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52f64441b/1a59a9ff2c784f79b95d954160e2c760/FLAG1d8b0dc5d [2019-10-14 23:43:39,934 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:43:39,935 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2019-10-14 23:43:39,946 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52f64441b/1a59a9ff2c784f79b95d954160e2c760/FLAG1d8b0dc5d [2019-10-14 23:43:40,243 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52f64441b/1a59a9ff2c784f79b95d954160e2c760 [2019-10-14 23:43:40,254 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:43:40,258 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:43:40,260 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:43:40,260 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:43:40,264 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:43:40,265 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:43:40" (1/1) ... [2019-10-14 23:43:40,267 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5287bcf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:40, skipping insertion in model container [2019-10-14 23:43:40,268 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:43:40" (1/1) ... [2019-10-14 23:43:40,275 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:43:40,339 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:43:40,817 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:43:40,831 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:43:40,943 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:43:40,971 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:43:40,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:40 WrapperNode [2019-10-14 23:43:40,972 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:43:40,973 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:43:40,973 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:43:40,973 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:43:40,984 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:40" (1/1) ... [2019-10-14 23:43:40,984 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:40" (1/1) ... [2019-10-14 23:43:40,999 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:40" (1/1) ... [2019-10-14 23:43:41,000 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:40" (1/1) ... [2019-10-14 23:43:41,020 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:40" (1/1) ... [2019-10-14 23:43:41,039 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:40" (1/1) ... [2019-10-14 23:43:41,043 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:40" (1/1) ... [2019-10-14 23:43:41,059 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:43:41,059 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:43:41,059 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:43:41,060 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:43:41,061 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:43:41,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:43:41,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:43:41,146 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:43:41,146 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:43:41,146 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-10-14 23:43:41,147 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2019-10-14 23:43:41,148 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2019-10-14 23:43:41,148 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 23:43:41,148 INFO L130 BoogieDeclarations]: Found specification of procedure read [2019-10-14 23:43:41,148 INFO L130 BoogieDeclarations]: Found specification of procedure write [2019-10-14 23:43:41,148 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2019-10-14 23:43:41,149 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2019-10-14 23:43:41,150 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2019-10-14 23:43:41,150 INFO L130 BoogieDeclarations]: Found specification of procedure init [2019-10-14 23:43:41,151 INFO L130 BoogieDeclarations]: Found specification of procedure check [2019-10-14 23:43:41,151 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:43:41,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:43:41,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:43:42,463 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:43:42,464 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-10-14 23:43:42,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:43:42 BoogieIcfgContainer [2019-10-14 23:43:42,466 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:43:42,468 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:43:42,469 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:43:42,473 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:43:42,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:43:40" (1/3) ... [2019-10-14 23:43:42,475 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51708b67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:43:42, skipping insertion in model container [2019-10-14 23:43:42,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:40" (2/3) ... [2019-10-14 23:43:42,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51708b67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:43:42, skipping insertion in model container [2019-10-14 23:43:42,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:43:42" (3/3) ... [2019-10-14 23:43:42,486 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2019-10-14 23:43:42,497 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:43:42,520 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:43:42,533 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:43:42,574 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:43:42,574 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:43:42,574 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:43:42,574 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:43:42,575 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:43:42,575 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:43:42,575 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:43:42,575 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:43:42,618 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states. [2019-10-14 23:43:42,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-14 23:43:42,638 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:42,640 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:42,642 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:42,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:42,649 INFO L82 PathProgramCache]: Analyzing trace with hash 343036633, now seen corresponding path program 1 times [2019-10-14 23:43:42,659 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:42,659 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580187384] [2019-10-14 23:43:42,660 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:42,660 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:42,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:43,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:43,689 WARN L191 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2019-10-14 23:43:43,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:43,748 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 23:43:43,749 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580187384] [2019-10-14 23:43:43,750 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:43:43,750 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:43:43,750 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774983888] [2019-10-14 23:43:43,755 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:43:43,756 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:43,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:43:43,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:43:43,774 INFO L87 Difference]: Start difference. First operand 223 states. Second operand 5 states. [2019-10-14 23:43:45,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:45,780 INFO L93 Difference]: Finished difference Result 636 states and 1118 transitions. [2019-10-14 23:43:45,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:43:45,783 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 98 [2019-10-14 23:43:45,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:45,801 INFO L225 Difference]: With dead ends: 636 [2019-10-14 23:43:45,801 INFO L226 Difference]: Without dead ends: 418 [2019-10-14 23:43:45,806 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:43:45,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2019-10-14 23:43:45,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 416. [2019-10-14 23:43:45,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 416 states. [2019-10-14 23:43:45,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 609 transitions. [2019-10-14 23:43:45,893 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 609 transitions. Word has length 98 [2019-10-14 23:43:45,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:45,894 INFO L462 AbstractCegarLoop]: Abstraction has 416 states and 609 transitions. [2019-10-14 23:43:45,894 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:43:45,895 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 609 transitions. [2019-10-14 23:43:45,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-10-14 23:43:45,902 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:45,902 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:45,903 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:45,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:45,905 INFO L82 PathProgramCache]: Analyzing trace with hash -936762471, now seen corresponding path program 1 times [2019-10-14 23:43:45,906 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:45,906 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165222596] [2019-10-14 23:43:45,906 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:45,906 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:45,906 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:45,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:46,267 WARN L191 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2019-10-14 23:43:46,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:46,289 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 23:43:46,290 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165222596] [2019-10-14 23:43:46,290 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:43:46,290 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:43:46,290 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553077539] [2019-10-14 23:43:46,292 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:43:46,292 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:46,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:43:46,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:43:46,293 INFO L87 Difference]: Start difference. First operand 416 states and 609 transitions. Second operand 4 states. [2019-10-14 23:43:48,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:48,041 INFO L93 Difference]: Finished difference Result 1202 states and 1757 transitions. [2019-10-14 23:43:48,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:43:48,043 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 99 [2019-10-14 23:43:48,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:48,048 INFO L225 Difference]: With dead ends: 1202 [2019-10-14 23:43:48,048 INFO L226 Difference]: Without dead ends: 818 [2019-10-14 23:43:48,052 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:43:48,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2019-10-14 23:43:48,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 418. [2019-10-14 23:43:48,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 418 states. [2019-10-14 23:43:48,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 611 transitions. [2019-10-14 23:43:48,099 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 611 transitions. Word has length 99 [2019-10-14 23:43:48,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:48,099 INFO L462 AbstractCegarLoop]: Abstraction has 418 states and 611 transitions. [2019-10-14 23:43:48,099 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:43:48,100 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 611 transitions. [2019-10-14 23:43:48,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-10-14 23:43:48,103 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:48,103 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:48,103 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:48,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:48,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1773874167, now seen corresponding path program 1 times [2019-10-14 23:43:48,104 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:48,104 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892107126] [2019-10-14 23:43:48,104 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:48,105 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:48,105 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:48,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:48,386 WARN L191 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2019-10-14 23:43:48,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:48,438 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 23:43:48,442 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892107126] [2019-10-14 23:43:48,443 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:43:48,443 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:43:48,444 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80816046] [2019-10-14 23:43:48,453 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:43:48,453 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:48,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:43:48,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:43:48,454 INFO L87 Difference]: Start difference. First operand 418 states and 611 transitions. Second operand 4 states. [2019-10-14 23:43:50,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:50,066 INFO L93 Difference]: Finished difference Result 1038 states and 1538 transitions. [2019-10-14 23:43:50,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:43:50,067 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 100 [2019-10-14 23:43:50,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:50,072 INFO L225 Difference]: With dead ends: 1038 [2019-10-14 23:43:50,072 INFO L226 Difference]: Without dead ends: 802 [2019-10-14 23:43:50,074 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:43:50,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2019-10-14 23:43:50,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 800. [2019-10-14 23:43:50,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 800 states. [2019-10-14 23:43:50,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1163 transitions. [2019-10-14 23:43:50,118 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1163 transitions. Word has length 100 [2019-10-14 23:43:50,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:50,119 INFO L462 AbstractCegarLoop]: Abstraction has 800 states and 1163 transitions. [2019-10-14 23:43:50,119 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:43:50,119 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1163 transitions. [2019-10-14 23:43:50,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-10-14 23:43:50,123 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:50,123 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:50,124 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:50,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:50,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1816624602, now seen corresponding path program 1 times [2019-10-14 23:43:50,125 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:50,125 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789522997] [2019-10-14 23:43:50,125 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:50,125 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:50,125 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:50,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:50,479 WARN L191 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2019-10-14 23:43:50,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:50,504 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 23:43:50,505 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789522997] [2019-10-14 23:43:50,505 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:43:50,505 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:43:50,505 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314967196] [2019-10-14 23:43:50,506 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:43:50,506 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:50,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:43:50,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:43:50,507 INFO L87 Difference]: Start difference. First operand 800 states and 1163 transitions. Second operand 5 states. [2019-10-14 23:43:51,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:51,546 INFO L93 Difference]: Finished difference Result 1239 states and 1819 transitions. [2019-10-14 23:43:51,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:43:51,547 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 100 [2019-10-14 23:43:51,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:51,551 INFO L225 Difference]: With dead ends: 1239 [2019-10-14 23:43:51,551 INFO L226 Difference]: Without dead ends: 611 [2019-10-14 23:43:51,553 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:43:51,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2019-10-14 23:43:51,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 611. [2019-10-14 23:43:51,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 611 states. [2019-10-14 23:43:51,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 883 transitions. [2019-10-14 23:43:51,582 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 883 transitions. Word has length 100 [2019-10-14 23:43:51,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:51,582 INFO L462 AbstractCegarLoop]: Abstraction has 611 states and 883 transitions. [2019-10-14 23:43:51,582 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:43:51,583 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 883 transitions. [2019-10-14 23:43:51,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-10-14 23:43:51,585 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:51,585 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:51,585 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:51,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:51,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1713248280, now seen corresponding path program 1 times [2019-10-14 23:43:51,586 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:51,586 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2989778] [2019-10-14 23:43:51,586 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:51,587 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:51,587 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:51,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:51,909 WARN L191 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2019-10-14 23:43:51,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:51,936 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 23:43:51,937 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2989778] [2019-10-14 23:43:51,937 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:43:51,937 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:43:51,937 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56132211] [2019-10-14 23:43:51,938 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:43:51,938 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:51,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:43:51,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:43:51,939 INFO L87 Difference]: Start difference. First operand 611 states and 883 transitions. Second operand 5 states. [2019-10-14 23:43:53,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:53,340 INFO L93 Difference]: Finished difference Result 1485 states and 2148 transitions. [2019-10-14 23:43:53,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:43:53,341 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 102 [2019-10-14 23:43:53,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:53,347 INFO L225 Difference]: With dead ends: 1485 [2019-10-14 23:43:53,347 INFO L226 Difference]: Without dead ends: 897 [2019-10-14 23:43:53,349 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:43:53,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2019-10-14 23:43:53,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 895. [2019-10-14 23:43:53,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 895 states. [2019-10-14 23:43:53,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1282 transitions. [2019-10-14 23:43:53,390 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1282 transitions. Word has length 102 [2019-10-14 23:43:53,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:53,391 INFO L462 AbstractCegarLoop]: Abstraction has 895 states and 1282 transitions. [2019-10-14 23:43:53,391 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:43:53,391 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1282 transitions. [2019-10-14 23:43:53,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-10-14 23:43:53,393 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:53,393 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:53,394 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:53,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:53,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1610605002, now seen corresponding path program 1 times [2019-10-14 23:43:53,394 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:53,395 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668594458] [2019-10-14 23:43:53,395 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:53,395 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:53,395 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:53,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:53,658 WARN L191 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2019-10-14 23:43:53,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:53,686 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 23:43:53,687 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668594458] [2019-10-14 23:43:53,687 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:43:53,687 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:43:53,687 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874239826] [2019-10-14 23:43:53,688 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:43:53,688 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:53,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:43:53,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:43:53,689 INFO L87 Difference]: Start difference. First operand 895 states and 1282 transitions. Second operand 4 states. [2019-10-14 23:43:55,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:55,305 INFO L93 Difference]: Finished difference Result 2174 states and 3182 transitions. [2019-10-14 23:43:55,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:43:55,306 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 104 [2019-10-14 23:43:55,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:55,315 INFO L225 Difference]: With dead ends: 2174 [2019-10-14 23:43:55,315 INFO L226 Difference]: Without dead ends: 1607 [2019-10-14 23:43:55,317 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:43:55,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2019-10-14 23:43:55,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1605. [2019-10-14 23:43:55,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1605 states. [2019-10-14 23:43:55,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 2301 transitions. [2019-10-14 23:43:55,392 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 2301 transitions. Word has length 104 [2019-10-14 23:43:55,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:55,392 INFO L462 AbstractCegarLoop]: Abstraction has 1605 states and 2301 transitions. [2019-10-14 23:43:55,392 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:43:55,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 2301 transitions. [2019-10-14 23:43:55,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-10-14 23:43:55,396 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:55,396 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:55,396 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:55,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:55,397 INFO L82 PathProgramCache]: Analyzing trace with hash -817857369, now seen corresponding path program 1 times [2019-10-14 23:43:55,397 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:55,397 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912698769] [2019-10-14 23:43:55,397 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:55,397 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:55,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:55,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:55,788 WARN L191 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2019-10-14 23:43:55,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:55,839 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 23:43:55,840 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912698769] [2019-10-14 23:43:55,841 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:43:55,841 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:43:55,841 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159637151] [2019-10-14 23:43:55,842 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:43:55,842 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:55,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:43:55,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:43:55,900 INFO L87 Difference]: Start difference. First operand 1605 states and 2301 transitions. Second operand 5 states. [2019-10-14 23:43:56,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:56,833 INFO L93 Difference]: Finished difference Result 2391 states and 3456 transitions. [2019-10-14 23:43:56,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:43:56,833 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 104 [2019-10-14 23:43:56,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:56,840 INFO L225 Difference]: With dead ends: 2391 [2019-10-14 23:43:56,841 INFO L226 Difference]: Without dead ends: 1319 [2019-10-14 23:43:56,843 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:43:56,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2019-10-14 23:43:56,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 1319. [2019-10-14 23:43:56,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1319 states. [2019-10-14 23:43:56,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1319 states to 1319 states and 1881 transitions. [2019-10-14 23:43:56,906 INFO L78 Accepts]: Start accepts. Automaton has 1319 states and 1881 transitions. Word has length 104 [2019-10-14 23:43:56,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:56,906 INFO L462 AbstractCegarLoop]: Abstraction has 1319 states and 1881 transitions. [2019-10-14 23:43:56,906 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:43:56,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states and 1881 transitions. [2019-10-14 23:43:56,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-10-14 23:43:56,909 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:56,909 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:56,909 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:56,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:56,909 INFO L82 PathProgramCache]: Analyzing trace with hash 669169858, now seen corresponding path program 1 times [2019-10-14 23:43:56,911 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:56,911 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454442417] [2019-10-14 23:43:56,912 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:56,912 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:56,912 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:56,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:57,155 WARN L191 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2019-10-14 23:43:57,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:57,176 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 23:43:57,176 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454442417] [2019-10-14 23:43:57,176 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:43:57,177 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:43:57,177 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415221740] [2019-10-14 23:43:57,177 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:43:57,178 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:57,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:43:57,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:43:57,178 INFO L87 Difference]: Start difference. First operand 1319 states and 1881 transitions. Second operand 4 states. [2019-10-14 23:43:57,415 WARN L191 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2019-10-14 23:43:58,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:58,388 INFO L93 Difference]: Finished difference Result 3197 states and 4694 transitions. [2019-10-14 23:43:58,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:43:58,389 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 106 [2019-10-14 23:43:58,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:58,400 INFO L225 Difference]: With dead ends: 3197 [2019-10-14 23:43:58,400 INFO L226 Difference]: Without dead ends: 2376 [2019-10-14 23:43:58,403 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:43:58,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2019-10-14 23:43:58,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 2374. [2019-10-14 23:43:58,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2374 states. [2019-10-14 23:43:58,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2374 states to 2374 states and 3419 transitions. [2019-10-14 23:43:58,507 INFO L78 Accepts]: Start accepts. Automaton has 2374 states and 3419 transitions. Word has length 106 [2019-10-14 23:43:58,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:58,508 INFO L462 AbstractCegarLoop]: Abstraction has 2374 states and 3419 transitions. [2019-10-14 23:43:58,508 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:43:58,508 INFO L276 IsEmpty]: Start isEmpty. Operand 2374 states and 3419 transitions. [2019-10-14 23:43:58,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-10-14 23:43:58,512 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:58,512 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:58,513 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:58,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:58,513 INFO L82 PathProgramCache]: Analyzing trace with hash -53512537, now seen corresponding path program 1 times [2019-10-14 23:43:58,513 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:58,514 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029736282] [2019-10-14 23:43:58,514 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:58,514 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:58,514 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:58,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:58,842 WARN L191 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2019-10-14 23:43:58,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:58,887 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 23:43:58,888 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029736282] [2019-10-14 23:43:58,888 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:43:58,888 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:43:58,888 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367448555] [2019-10-14 23:43:58,889 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:43:58,889 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:58,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:43:58,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:43:58,892 INFO L87 Difference]: Start difference. First operand 2374 states and 3419 transitions. Second operand 5 states. [2019-10-14 23:44:00,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:44:00,400 INFO L93 Difference]: Finished difference Result 6864 states and 9875 transitions. [2019-10-14 23:44:00,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:44:00,401 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 106 [2019-10-14 23:44:00,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:44:00,421 INFO L225 Difference]: With dead ends: 6864 [2019-10-14 23:44:00,421 INFO L226 Difference]: Without dead ends: 4533 [2019-10-14 23:44:00,427 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:44:00,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4533 states. [2019-10-14 23:44:00,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4533 to 4531. [2019-10-14 23:44:00,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4531 states. [2019-10-14 23:44:00,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4531 states to 4531 states and 6454 transitions. [2019-10-14 23:44:00,680 INFO L78 Accepts]: Start accepts. Automaton has 4531 states and 6454 transitions. Word has length 106 [2019-10-14 23:44:00,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:44:00,681 INFO L462 AbstractCegarLoop]: Abstraction has 4531 states and 6454 transitions. [2019-10-14 23:44:00,681 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:44:00,681 INFO L276 IsEmpty]: Start isEmpty. Operand 4531 states and 6454 transitions. [2019-10-14 23:44:00,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-10-14 23:44:00,688 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:44:00,689 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:44:00,689 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:44:00,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:44:00,689 INFO L82 PathProgramCache]: Analyzing trace with hash 2125527721, now seen corresponding path program 1 times [2019-10-14 23:44:00,689 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:44:00,694 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034253127] [2019-10-14 23:44:00,694 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:00,694 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:00,695 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:44:00,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:00,941 WARN L191 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2019-10-14 23:44:00,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:00,961 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 23:44:00,961 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034253127] [2019-10-14 23:44:00,961 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:44:00,962 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:44:00,962 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519303176] [2019-10-14 23:44:00,962 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:44:00,962 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:44:00,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:44:00,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:44:00,963 INFO L87 Difference]: Start difference. First operand 4531 states and 6454 transitions. Second operand 4 states. [2019-10-14 23:44:02,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:44:02,113 INFO L93 Difference]: Finished difference Result 13393 states and 19105 transitions. [2019-10-14 23:44:02,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:44:02,113 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 107 [2019-10-14 23:44:02,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:44:02,140 INFO L225 Difference]: With dead ends: 13393 [2019-10-14 23:44:02,140 INFO L226 Difference]: Without dead ends: 8971 [2019-10-14 23:44:02,148 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:44:02,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8971 states. [2019-10-14 23:44:02,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8971 to 4537. [2019-10-14 23:44:02,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4537 states. [2019-10-14 23:44:02,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4537 states to 4537 states and 6460 transitions. [2019-10-14 23:44:02,386 INFO L78 Accepts]: Start accepts. Automaton has 4537 states and 6460 transitions. Word has length 107 [2019-10-14 23:44:02,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:44:02,387 INFO L462 AbstractCegarLoop]: Abstraction has 4537 states and 6460 transitions. [2019-10-14 23:44:02,387 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:44:02,387 INFO L276 IsEmpty]: Start isEmpty. Operand 4537 states and 6460 transitions. [2019-10-14 23:44:02,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-14 23:44:02,393 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:44:02,394 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:44:02,394 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:44:02,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:44:02,394 INFO L82 PathProgramCache]: Analyzing trace with hash -871367960, now seen corresponding path program 1 times [2019-10-14 23:44:02,394 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:44:02,395 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086368949] [2019-10-14 23:44:02,395 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:02,395 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:02,395 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:44:02,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:02,701 WARN L191 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2019-10-14 23:44:02,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:02,727 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 23:44:02,728 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086368949] [2019-10-14 23:44:02,728 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:44:02,728 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:44:02,728 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386009828] [2019-10-14 23:44:02,729 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:44:02,729 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:44:02,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:44:02,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:44:02,730 INFO L87 Difference]: Start difference. First operand 4537 states and 6460 transitions. Second operand 5 states. [2019-10-14 23:44:03,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:44:03,715 INFO L93 Difference]: Finished difference Result 9032 states and 12864 transitions. [2019-10-14 23:44:03,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:44:03,716 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2019-10-14 23:44:03,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:44:03,733 INFO L225 Difference]: With dead ends: 9032 [2019-10-14 23:44:03,733 INFO L226 Difference]: Without dead ends: 4531 [2019-10-14 23:44:03,740 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:44:03,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4531 states. [2019-10-14 23:44:03,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4531 to 4531. [2019-10-14 23:44:03,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4531 states. [2019-10-14 23:44:03,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4531 states to 4531 states and 6448 transitions. [2019-10-14 23:44:03,913 INFO L78 Accepts]: Start accepts. Automaton has 4531 states and 6448 transitions. Word has length 108 [2019-10-14 23:44:03,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:44:03,913 INFO L462 AbstractCegarLoop]: Abstraction has 4531 states and 6448 transitions. [2019-10-14 23:44:03,913 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:44:03,913 INFO L276 IsEmpty]: Start isEmpty. Operand 4531 states and 6448 transitions. [2019-10-14 23:44:03,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-14 23:44:03,920 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:44:03,920 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:44:03,920 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:44:03,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:44:03,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1746692037, now seen corresponding path program 1 times [2019-10-14 23:44:03,921 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:44:03,921 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20729326] [2019-10-14 23:44:03,921 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:03,921 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:03,922 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:44:03,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:04,167 WARN L191 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2019-10-14 23:44:04,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:04,195 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 23:44:04,196 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20729326] [2019-10-14 23:44:04,196 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:44:04,196 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:44:04,197 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340803513] [2019-10-14 23:44:04,197 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:44:04,197 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:44:04,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:44:04,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:44:04,198 INFO L87 Difference]: Start difference. First operand 4531 states and 6448 transitions. Second operand 4 states. [2019-10-14 23:44:05,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:44:05,779 INFO L93 Difference]: Finished difference Result 10307 states and 14773 transitions. [2019-10-14 23:44:05,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:44:05,780 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 108 [2019-10-14 23:44:05,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:44:05,798 INFO L225 Difference]: With dead ends: 10307 [2019-10-14 23:44:05,799 INFO L226 Difference]: Without dead ends: 6717 [2019-10-14 23:44:05,805 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:44:05,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6717 states. [2019-10-14 23:44:06,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6717 to 6715. [2019-10-14 23:44:06,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6715 states. [2019-10-14 23:44:06,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6715 states to 6715 states and 9383 transitions. [2019-10-14 23:44:06,043 INFO L78 Accepts]: Start accepts. Automaton has 6715 states and 9383 transitions. Word has length 108 [2019-10-14 23:44:06,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:44:06,043 INFO L462 AbstractCegarLoop]: Abstraction has 6715 states and 9383 transitions. [2019-10-14 23:44:06,043 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:44:06,043 INFO L276 IsEmpty]: Start isEmpty. Operand 6715 states and 9383 transitions. [2019-10-14 23:44:06,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-14 23:44:06,051 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:44:06,051 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:44:06,051 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:44:06,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:44:06,051 INFO L82 PathProgramCache]: Analyzing trace with hash -848505304, now seen corresponding path program 1 times [2019-10-14 23:44:06,052 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:44:06,052 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18988233] [2019-10-14 23:44:06,052 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:06,052 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:06,052 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:44:06,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:06,424 WARN L191 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2019-10-14 23:44:06,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:06,457 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 23:44:06,458 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18988233] [2019-10-14 23:44:06,458 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:44:06,458 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:44:06,458 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864740673] [2019-10-14 23:44:06,459 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:44:06,460 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:44:06,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:44:06,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:44:06,462 INFO L87 Difference]: Start difference. First operand 6715 states and 9383 transitions. Second operand 5 states. [2019-10-14 23:44:07,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:44:07,509 INFO L93 Difference]: Finished difference Result 12456 states and 17427 transitions. [2019-10-14 23:44:07,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:44:07,509 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 110 [2019-10-14 23:44:07,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:44:07,522 INFO L225 Difference]: With dead ends: 12456 [2019-10-14 23:44:07,522 INFO L226 Difference]: Without dead ends: 6092 [2019-10-14 23:44:07,530 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:44:07,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6092 states. [2019-10-14 23:44:07,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6092 to 6023. [2019-10-14 23:44:07,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6023 states. [2019-10-14 23:44:07,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6023 states to 6023 states and 8366 transitions. [2019-10-14 23:44:07,867 INFO L78 Accepts]: Start accepts. Automaton has 6023 states and 8366 transitions. Word has length 110 [2019-10-14 23:44:07,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:44:07,868 INFO L462 AbstractCegarLoop]: Abstraction has 6023 states and 8366 transitions. [2019-10-14 23:44:07,868 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:44:07,868 INFO L276 IsEmpty]: Start isEmpty. Operand 6023 states and 8366 transitions. [2019-10-14 23:44:07,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-10-14 23:44:07,875 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:44:07,875 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:44:07,875 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:44:07,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:44:07,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1621946400, now seen corresponding path program 1 times [2019-10-14 23:44:07,876 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:44:07,876 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673361078] [2019-10-14 23:44:07,876 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:07,876 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:07,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:44:07,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:08,079 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2019-10-14 23:44:08,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:08,099 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 23:44:08,100 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673361078] [2019-10-14 23:44:08,100 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:44:08,100 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:44:08,100 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772447869] [2019-10-14 23:44:08,101 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:44:08,101 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:44:08,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:44:08,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:44:08,101 INFO L87 Difference]: Start difference. First operand 6023 states and 8366 transitions. Second operand 4 states. [2019-10-14 23:44:08,321 WARN L191 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2019-10-14 23:44:09,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:44:09,521 INFO L93 Difference]: Finished difference Result 14841 states and 21156 transitions. [2019-10-14 23:44:09,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:44:09,521 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 112 [2019-10-14 23:44:09,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:44:09,543 INFO L225 Difference]: With dead ends: 14841 [2019-10-14 23:44:09,543 INFO L226 Difference]: Without dead ends: 10994 [2019-10-14 23:44:09,554 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:44:09,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10994 states. [2019-10-14 23:44:10,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10994 to 10992. [2019-10-14 23:44:10,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10992 states. [2019-10-14 23:44:10,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10992 states to 10992 states and 15347 transitions. [2019-10-14 23:44:10,040 INFO L78 Accepts]: Start accepts. Automaton has 10992 states and 15347 transitions. Word has length 112 [2019-10-14 23:44:10,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:44:10,040 INFO L462 AbstractCegarLoop]: Abstraction has 10992 states and 15347 transitions. [2019-10-14 23:44:10,040 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:44:10,041 INFO L276 IsEmpty]: Start isEmpty. Operand 10992 states and 15347 transitions. [2019-10-14 23:44:10,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-10-14 23:44:10,049 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:44:10,049 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:44:10,050 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:44:10,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:44:10,050 INFO L82 PathProgramCache]: Analyzing trace with hash 900773541, now seen corresponding path program 1 times [2019-10-14 23:44:10,050 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:44:10,050 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509999550] [2019-10-14 23:44:10,051 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:10,051 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:10,051 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:44:10,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:10,402 WARN L191 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2019-10-14 23:44:10,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:10,458 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 23:44:10,458 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509999550] [2019-10-14 23:44:10,459 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:44:10,459 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:44:10,459 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317797823] [2019-10-14 23:44:10,460 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:44:10,460 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:44:10,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:44:10,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:44:10,461 INFO L87 Difference]: Start difference. First operand 10992 states and 15347 transitions. Second operand 5 states. [2019-10-14 23:44:12,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:44:12,545 INFO L93 Difference]: Finished difference Result 22202 states and 30971 transitions. [2019-10-14 23:44:12,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:44:12,545 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 112 [2019-10-14 23:44:12,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:44:12,568 INFO L225 Difference]: With dead ends: 22202 [2019-10-14 23:44:12,568 INFO L226 Difference]: Without dead ends: 11365 [2019-10-14 23:44:12,587 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:44:12,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11365 states. [2019-10-14 23:44:13,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11365 to 11179. [2019-10-14 23:44:13,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11179 states. [2019-10-14 23:44:13,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11179 states to 11179 states and 15555 transitions. [2019-10-14 23:44:13,231 INFO L78 Accepts]: Start accepts. Automaton has 11179 states and 15555 transitions. Word has length 112 [2019-10-14 23:44:13,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:44:13,232 INFO L462 AbstractCegarLoop]: Abstraction has 11179 states and 15555 transitions. [2019-10-14 23:44:13,232 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:44:13,232 INFO L276 IsEmpty]: Start isEmpty. Operand 11179 states and 15555 transitions. [2019-10-14 23:44:13,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-10-14 23:44:13,239 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:44:13,239 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:44:13,239 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:44:13,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:44:13,240 INFO L82 PathProgramCache]: Analyzing trace with hash 288500069, now seen corresponding path program 1 times [2019-10-14 23:44:13,240 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:44:13,240 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492428529] [2019-10-14 23:44:13,240 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:13,240 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:13,240 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:44:13,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:13,475 WARN L191 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2019-10-14 23:44:13,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:13,494 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 23:44:13,495 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492428529] [2019-10-14 23:44:13,495 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:44:13,495 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:44:13,495 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630169833] [2019-10-14 23:44:13,496 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:44:13,496 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:44:13,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:44:13,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:44:13,497 INFO L87 Difference]: Start difference. First operand 11179 states and 15555 transitions. Second operand 4 states.