/usr/bin/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/systemc/toy2.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:24:28,963 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:24:28,966 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:24:28,982 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:24:28,982 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:24:28,983 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:24:28,985 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:24:28,987 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:24:28,988 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:24:28,989 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:24:28,990 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:24:28,991 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:24:28,992 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:24:28,993 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:24:28,994 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:24:28,995 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:24:28,996 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:24:28,997 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:24:28,999 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:24:29,000 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:24:29,002 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:24:29,004 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:24:29,005 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:24:29,006 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:24:29,009 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-06 22:24:29,009 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-06 22:24:29,010 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-06 22:24:29,012 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-06 22:24:29,013 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-06 22:24:29,015 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-06 22:24:29,016 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 22:24:29,018 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 22:24:29,019 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 22:24:29,020 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 22:24:29,021 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 22:24:29,021 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 22:24:29,022 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 22:24:29,022 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 22:24:29,023 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:24:29,024 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:24:29,025 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:24:29,026 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 [2019-11-06 22:24:29,050 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:24:29,050 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:24:29,051 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:24:29,052 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:24:29,052 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:24:29,052 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:24:29,052 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:24:29,052 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:24:29,053 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:24:29,053 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:24:29,053 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:24:29,053 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:24:29,053 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:24:29,053 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:24:29,054 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:24:29,054 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:24:29,054 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:24:29,054 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:24:29,055 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:24:29,055 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:24:29,055 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:24:29,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:24:29,055 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:24:29,056 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:24:29,056 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:24:29,056 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:24:29,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:24:29,056 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:24:29,057 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 22:24:29,316 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:24:29,328 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:24:29,332 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:24:29,334 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:24:29,334 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:24:29,335 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/toy2.cil.c [2019-11-06 22:24:29,417 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9164990e/f7c8fcb64e8f431f9be7d8bef567e13b/FLAG5eaf02d74 [2019-11-06 22:24:29,921 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:24:29,925 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/toy2.cil.c [2019-11-06 22:24:29,947 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9164990e/f7c8fcb64e8f431f9be7d8bef567e13b/FLAG5eaf02d74 [2019-11-06 22:24:30,208 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9164990e/f7c8fcb64e8f431f9be7d8bef567e13b [2019-11-06 22:24:30,220 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:24:30,222 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:24:30,223 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:24:30,223 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:24:30,227 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:24:30,228 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:24:30" (1/1) ... [2019-11-06 22:24:30,231 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c825d02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:24:30, skipping insertion in model container [2019-11-06 22:24:30,232 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:24:30" (1/1) ... [2019-11-06 22:24:30,241 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:24:30,303 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:24:30,561 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:24:30,567 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:24:30,701 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:24:30,717 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:24:30,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:24:30 WrapperNode [2019-11-06 22:24:30,717 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:24:30,718 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:24:30,718 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:24:30,718 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:24:30,729 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:24:30" (1/1) ... [2019-11-06 22:24:30,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:24:30" (1/1) ... [2019-11-06 22:24:30,737 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:24:30" (1/1) ... [2019-11-06 22:24:30,737 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:24:30" (1/1) ... [2019-11-06 22:24:30,748 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:24:30" (1/1) ... [2019-11-06 22:24:30,764 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:24:30" (1/1) ... [2019-11-06 22:24:30,767 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:24:30" (1/1) ... [2019-11-06 22:24:30,771 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:24:30,772 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:24:30,772 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:24:30,772 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:24:30,773 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:24:30" (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 [2019-11-06 22:24:30,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:24:30,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:24:30,824 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2019-11-06 22:24:30,824 INFO L138 BoogieDeclarations]: Found implementation of procedure write_loop [2019-11-06 22:24:30,824 INFO L138 BoogieDeclarations]: Found implementation of procedure compute1 [2019-11-06 22:24:30,824 INFO L138 BoogieDeclarations]: Found implementation of procedure compute2 [2019-11-06 22:24:30,824 INFO L138 BoogieDeclarations]: Found implementation of procedure write_back [2019-11-06 22:24:30,824 INFO L138 BoogieDeclarations]: Found implementation of procedure read [2019-11-06 22:24:30,824 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2019-11-06 22:24:30,825 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2019-11-06 22:24:30,825 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:24:30,825 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:24:30,825 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:24:30,825 INFO L130 BoogieDeclarations]: Found specification of procedure error [2019-11-06 22:24:30,826 INFO L130 BoogieDeclarations]: Found specification of procedure write_loop [2019-11-06 22:24:30,826 INFO L130 BoogieDeclarations]: Found specification of procedure compute1 [2019-11-06 22:24:30,826 INFO L130 BoogieDeclarations]: Found specification of procedure compute2 [2019-11-06 22:24:30,826 INFO L130 BoogieDeclarations]: Found specification of procedure write_back [2019-11-06 22:24:30,826 INFO L130 BoogieDeclarations]: Found specification of procedure read [2019-11-06 22:24:30,826 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2019-11-06 22:24:30,827 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2019-11-06 22:24:30,827 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:24:30,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:24:30,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:24:31,522 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:24:31,524 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-11-06 22:24:31,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:24:31 BoogieIcfgContainer [2019-11-06 22:24:31,527 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:24:31,529 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:24:31,530 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:24:31,533 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:24:31,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:24:30" (1/3) ... [2019-11-06 22:24:31,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c87498b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:24:31, skipping insertion in model container [2019-11-06 22:24:31,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:24:30" (2/3) ... [2019-11-06 22:24:31,535 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c87498b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:24:31, skipping insertion in model container [2019-11-06 22:24:31,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:24:31" (3/3) ... [2019-11-06 22:24:31,542 INFO L109 eAbstractionObserver]: Analyzing ICFG toy2.cil.c [2019-11-06 22:24:31,553 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:24:31,575 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:24:31,585 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:24:31,618 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:24:31,618 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:24:31,619 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:24:31,619 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:24:31,619 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:24:31,619 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:24:31,620 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:24:31,620 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:24:31,642 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states. [2019-11-06 22:24:31,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-06 22:24:31,652 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:24:31,653 INFO L410 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] [2019-11-06 22:24:31,655 INFO L410 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:24:31,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:24:31,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1201692838, now seen corresponding path program 1 times [2019-11-06 22:24:31,669 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:24:31,669 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173363147] [2019-11-06 22:24:31,669 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:24:31,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:32,073 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-11-06 22:24:32,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:32,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:24:32,144 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173363147] [2019-11-06 22:24:32,146 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:24:32,146 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:24:32,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649740528] [2019-11-06 22:24:32,157 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:24:32,157 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:24:32,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:24:32,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:24:32,188 INFO L87 Difference]: Start difference. First operand 158 states. Second operand 5 states. [2019-11-06 22:24:33,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:24:33,843 INFO L93 Difference]: Finished difference Result 487 states and 852 transitions. [2019-11-06 22:24:33,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:24:33,846 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2019-11-06 22:24:33,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:24:33,876 INFO L225 Difference]: With dead ends: 487 [2019-11-06 22:24:33,876 INFO L226 Difference]: Without dead ends: 332 [2019-11-06 22:24:33,888 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:24:33,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2019-11-06 22:24:33,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 294. [2019-11-06 22:24:33,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-11-06 22:24:33,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 485 transitions. [2019-11-06 22:24:33,977 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 485 transitions. Word has length 46 [2019-11-06 22:24:33,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:24:33,978 INFO L462 AbstractCegarLoop]: Abstraction has 294 states and 485 transitions. [2019-11-06 22:24:33,978 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:24:33,978 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 485 transitions. [2019-11-06 22:24:33,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-06 22:24:33,983 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:24:33,984 INFO L410 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] [2019-11-06 22:24:33,984 INFO L410 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:24:33,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:24:33,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1432311450, now seen corresponding path program 1 times [2019-11-06 22:24:33,985 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:24:33,985 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448379037] [2019-11-06 22:24:33,985 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:24:34,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:34,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:34,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:24:34,231 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448379037] [2019-11-06 22:24:34,246 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:24:34,246 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:24:34,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369561994] [2019-11-06 22:24:34,248 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:24:34,248 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:24:34,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:24:34,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:24:34,249 INFO L87 Difference]: Start difference. First operand 294 states and 485 transitions. Second operand 5 states. [2019-11-06 22:24:35,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:24:35,634 INFO L93 Difference]: Finished difference Result 833 states and 1372 transitions. [2019-11-06 22:24:35,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 22:24:35,635 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2019-11-06 22:24:35,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:24:35,641 INFO L225 Difference]: With dead ends: 833 [2019-11-06 22:24:35,641 INFO L226 Difference]: Without dead ends: 565 [2019-11-06 22:24:35,644 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:24:35,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2019-11-06 22:24:35,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 505. [2019-11-06 22:24:35,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2019-11-06 22:24:35,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 830 transitions. [2019-11-06 22:24:35,709 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 830 transitions. Word has length 46 [2019-11-06 22:24:35,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:24:35,709 INFO L462 AbstractCegarLoop]: Abstraction has 505 states and 830 transitions. [2019-11-06 22:24:35,709 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:24:35,709 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 830 transitions. [2019-11-06 22:24:35,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-06 22:24:35,713 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:24:35,714 INFO L410 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] [2019-11-06 22:24:35,714 INFO L410 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:24:35,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:24:35,714 INFO L82 PathProgramCache]: Analyzing trace with hash -730711576, now seen corresponding path program 1 times [2019-11-06 22:24:35,715 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:24:35,715 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756438232] [2019-11-06 22:24:35,715 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:24:35,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:35,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:35,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:24:35,889 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756438232] [2019-11-06 22:24:35,890 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:24:35,890 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:24:35,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243408293] [2019-11-06 22:24:35,891 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:24:35,891 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:24:35,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:24:35,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:24:35,892 INFO L87 Difference]: Start difference. First operand 505 states and 830 transitions. Second operand 5 states. [2019-11-06 22:24:37,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:24:37,294 INFO L93 Difference]: Finished difference Result 1502 states and 2473 transitions. [2019-11-06 22:24:37,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 22:24:37,295 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2019-11-06 22:24:37,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:24:37,302 INFO L225 Difference]: With dead ends: 1502 [2019-11-06 22:24:37,303 INFO L226 Difference]: Without dead ends: 1025 [2019-11-06 22:24:37,305 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:24:37,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2019-11-06 22:24:37,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 941. [2019-11-06 22:24:37,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 941 states. [2019-11-06 22:24:37,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 1556 transitions. [2019-11-06 22:24:37,381 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 1556 transitions. Word has length 46 [2019-11-06 22:24:37,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:24:37,382 INFO L462 AbstractCegarLoop]: Abstraction has 941 states and 1556 transitions. [2019-11-06 22:24:37,382 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:24:37,382 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 1556 transitions. [2019-11-06 22:24:37,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-06 22:24:37,386 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:24:37,386 INFO L410 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] [2019-11-06 22:24:37,386 INFO L410 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:24:37,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:24:37,387 INFO L82 PathProgramCache]: Analyzing trace with hash -708079322, now seen corresponding path program 1 times [2019-11-06 22:24:37,387 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:24:37,387 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680767197] [2019-11-06 22:24:37,387 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:24:37,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:37,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:37,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:24:37,541 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680767197] [2019-11-06 22:24:37,541 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:24:37,542 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:24:37,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507130731] [2019-11-06 22:24:37,542 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:24:37,542 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:24:37,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:24:37,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:24:37,543 INFO L87 Difference]: Start difference. First operand 941 states and 1556 transitions. Second operand 4 states. [2019-11-06 22:24:38,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:24:38,442 INFO L93 Difference]: Finished difference Result 2489 states and 4048 transitions. [2019-11-06 22:24:38,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:24:38,443 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2019-11-06 22:24:38,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:24:38,453 INFO L225 Difference]: With dead ends: 2489 [2019-11-06 22:24:38,453 INFO L226 Difference]: Without dead ends: 1580 [2019-11-06 22:24:38,457 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:24:38,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1580 states. [2019-11-06 22:24:38,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1580 to 1468. [2019-11-06 22:24:38,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1468 states. [2019-11-06 22:24:38,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 2387 transitions. [2019-11-06 22:24:38,567 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 2387 transitions. Word has length 46 [2019-11-06 22:24:38,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:24:38,567 INFO L462 AbstractCegarLoop]: Abstraction has 1468 states and 2387 transitions. [2019-11-06 22:24:38,567 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:24:38,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 2387 transitions. [2019-11-06 22:24:38,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-06 22:24:38,570 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:24:38,570 INFO L410 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] [2019-11-06 22:24:38,571 INFO L410 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:24:38,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:24:38,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1217552412, now seen corresponding path program 1 times [2019-11-06 22:24:38,571 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:24:38,572 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074546160] [2019-11-06 22:24:38,572 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:24:38,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:38,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:38,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:24:38,695 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074546160] [2019-11-06 22:24:38,695 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:24:38,695 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:24:38,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148000325] [2019-11-06 22:24:38,696 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:24:38,696 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:24:38,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:24:38,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:24:38,697 INFO L87 Difference]: Start difference. First operand 1468 states and 2387 transitions. Second operand 4 states. [2019-11-06 22:24:39,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:24:39,744 INFO L93 Difference]: Finished difference Result 4169 states and 6907 transitions. [2019-11-06 22:24:39,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:24:39,745 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2019-11-06 22:24:39,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:24:39,765 INFO L225 Difference]: With dead ends: 4169 [2019-11-06 22:24:39,765 INFO L226 Difference]: Without dead ends: 2735 [2019-11-06 22:24:39,773 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:24:39,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2735 states. [2019-11-06 22:24:40,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2735 to 2532. [2019-11-06 22:24:40,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2532 states. [2019-11-06 22:24:40,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2532 states to 2532 states and 4179 transitions. [2019-11-06 22:24:40,030 INFO L78 Accepts]: Start accepts. Automaton has 2532 states and 4179 transitions. Word has length 46 [2019-11-06 22:24:40,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:24:40,030 INFO L462 AbstractCegarLoop]: Abstraction has 2532 states and 4179 transitions. [2019-11-06 22:24:40,031 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:24:40,031 INFO L276 IsEmpty]: Start isEmpty. Operand 2532 states and 4179 transitions. [2019-11-06 22:24:40,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-06 22:24:40,034 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:24:40,035 INFO L410 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] [2019-11-06 22:24:40,036 INFO L410 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:24:40,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:24:40,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1587238149, now seen corresponding path program 1 times [2019-11-06 22:24:40,036 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:24:40,036 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522013397] [2019-11-06 22:24:40,037 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:24:40,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:40,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:40,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:24:40,197 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522013397] [2019-11-06 22:24:40,198 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:24:40,198 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:24:40,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850438380] [2019-11-06 22:24:40,200 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:24:40,200 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:24:40,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:24:40,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:24:40,201 INFO L87 Difference]: Start difference. First operand 2532 states and 4179 transitions. Second operand 5 states. [2019-11-06 22:24:41,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:24:41,316 INFO L93 Difference]: Finished difference Result 5600 states and 9175 transitions. [2019-11-06 22:24:41,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:24:41,317 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2019-11-06 22:24:41,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:24:41,344 INFO L225 Difference]: With dead ends: 5600 [2019-11-06 22:24:41,346 INFO L226 Difference]: Without dead ends: 3121 [2019-11-06 22:24:41,369 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:24:41,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3121 states. [2019-11-06 22:24:41,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3121 to 2871. [2019-11-06 22:24:41,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2871 states. [2019-11-06 22:24:41,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2871 states to 2871 states and 4710 transitions. [2019-11-06 22:24:41,619 INFO L78 Accepts]: Start accepts. Automaton has 2871 states and 4710 transitions. Word has length 46 [2019-11-06 22:24:41,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:24:41,620 INFO L462 AbstractCegarLoop]: Abstraction has 2871 states and 4710 transitions. [2019-11-06 22:24:41,620 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:24:41,620 INFO L276 IsEmpty]: Start isEmpty. Operand 2871 states and 4710 transitions. [2019-11-06 22:24:41,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-06 22:24:41,622 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:24:41,622 INFO L410 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] [2019-11-06 22:24:41,622 INFO L410 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:24:41,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:24:41,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1136286267, now seen corresponding path program 1 times [2019-11-06 22:24:41,623 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:24:41,623 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525469315] [2019-11-06 22:24:41,623 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:24:41,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:41,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:41,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:24:41,743 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525469315] [2019-11-06 22:24:41,743 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:24:41,744 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:24:41,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531067801] [2019-11-06 22:24:41,744 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:24:41,744 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:24:41,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:24:41,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:24:41,745 INFO L87 Difference]: Start difference. First operand 2871 states and 4710 transitions. Second operand 5 states. [2019-11-06 22:24:42,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:24:42,928 INFO L93 Difference]: Finished difference Result 5954 states and 9818 transitions. [2019-11-06 22:24:42,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:24:42,929 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2019-11-06 22:24:42,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:24:42,946 INFO L225 Difference]: With dead ends: 5954 [2019-11-06 22:24:42,947 INFO L226 Difference]: Without dead ends: 3125 [2019-11-06 22:24:42,961 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:24:42,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3125 states. [2019-11-06 22:24:43,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3125 to 2875. [2019-11-06 22:24:43,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2875 states. [2019-11-06 22:24:43,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2875 states to 2875 states and 4646 transitions. [2019-11-06 22:24:43,285 INFO L78 Accepts]: Start accepts. Automaton has 2875 states and 4646 transitions. Word has length 46 [2019-11-06 22:24:43,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:24:43,286 INFO L462 AbstractCegarLoop]: Abstraction has 2875 states and 4646 transitions. [2019-11-06 22:24:43,286 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:24:43,286 INFO L276 IsEmpty]: Start isEmpty. Operand 2875 states and 4646 transitions. [2019-11-06 22:24:43,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-06 22:24:43,289 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:24:43,289 INFO L410 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] [2019-11-06 22:24:43,289 INFO L410 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:24:43,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:24:43,290 INFO L82 PathProgramCache]: Analyzing trace with hash 318637817, now seen corresponding path program 1 times [2019-11-06 22:24:43,290 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:24:43,291 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476917878] [2019-11-06 22:24:43,291 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:24:43,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:43,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:43,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:24:43,436 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476917878] [2019-11-06 22:24:43,437 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:24:43,441 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:24:43,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521625774] [2019-11-06 22:24:43,442 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:24:43,442 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:24:43,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:24:43,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:24:43,442 INFO L87 Difference]: Start difference. First operand 2875 states and 4646 transitions. Second operand 5 states. [2019-11-06 22:24:44,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:24:44,550 INFO L93 Difference]: Finished difference Result 6688 states and 10746 transitions. [2019-11-06 22:24:44,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:24:44,551 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2019-11-06 22:24:44,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:24:44,576 INFO L225 Difference]: With dead ends: 6688 [2019-11-06 22:24:44,576 INFO L226 Difference]: Without dead ends: 3863 [2019-11-06 22:24:44,589 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:24:44,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3863 states. [2019-11-06 22:24:44,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3863 to 3581. [2019-11-06 22:24:44,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3581 states. [2019-11-06 22:24:44,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3581 states to 3581 states and 5764 transitions. [2019-11-06 22:24:44,900 INFO L78 Accepts]: Start accepts. Automaton has 3581 states and 5764 transitions. Word has length 46 [2019-11-06 22:24:44,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:24:44,901 INFO L462 AbstractCegarLoop]: Abstraction has 3581 states and 5764 transitions. [2019-11-06 22:24:44,901 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:24:44,901 INFO L276 IsEmpty]: Start isEmpty. Operand 3581 states and 5764 transitions. [2019-11-06 22:24:44,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-06 22:24:44,902 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:24:44,902 INFO L410 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] [2019-11-06 22:24:44,903 INFO L410 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:24:44,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:24:44,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1370305925, now seen corresponding path program 1 times [2019-11-06 22:24:44,903 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:24:44,903 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422430819] [2019-11-06 22:24:44,903 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:24:44,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:45,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:45,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:24:45,053 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422430819] [2019-11-06 22:24:45,053 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:24:45,053 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:24:45,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432656125] [2019-11-06 22:24:45,054 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:24:45,055 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:24:45,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:24:45,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:24:45,055 INFO L87 Difference]: Start difference. First operand 3581 states and 5764 transitions. Second operand 4 states. [2019-11-06 22:24:45,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:24:45,902 INFO L93 Difference]: Finished difference Result 7654 states and 12385 transitions. [2019-11-06 22:24:45,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:24:45,903 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2019-11-06 22:24:45,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:24:45,927 INFO L225 Difference]: With dead ends: 7654 [2019-11-06 22:24:45,927 INFO L226 Difference]: Without dead ends: 4139 [2019-11-06 22:24:45,943 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:24:45,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4139 states. [2019-11-06 22:24:46,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4139 to 3896. [2019-11-06 22:24:46,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3896 states. [2019-11-06 22:24:46,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3896 states to 3896 states and 6157 transitions. [2019-11-06 22:24:46,185 INFO L78 Accepts]: Start accepts. Automaton has 3896 states and 6157 transitions. Word has length 46 [2019-11-06 22:24:46,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:24:46,185 INFO L462 AbstractCegarLoop]: Abstraction has 3896 states and 6157 transitions. [2019-11-06 22:24:46,186 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:24:46,186 INFO L276 IsEmpty]: Start isEmpty. Operand 3896 states and 6157 transitions. [2019-11-06 22:24:46,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-06 22:24:46,187 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:24:46,187 INFO L410 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] [2019-11-06 22:24:46,187 INFO L410 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:24:46,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:24:46,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1336313469, now seen corresponding path program 1 times [2019-11-06 22:24:46,188 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:24:46,188 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357937942] [2019-11-06 22:24:46,188 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:24:46,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:46,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:46,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:24:46,307 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357937942] [2019-11-06 22:24:46,307 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:24:46,308 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:24:46,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821635463] [2019-11-06 22:24:46,308 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:24:46,308 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:24:46,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:24:46,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:24:46,309 INFO L87 Difference]: Start difference. First operand 3896 states and 6157 transitions. Second operand 4 states. [2019-11-06 22:24:47,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:24:47,482 INFO L93 Difference]: Finished difference Result 8673 states and 13916 transitions. [2019-11-06 22:24:47,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:24:47,483 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2019-11-06 22:24:47,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:24:47,534 INFO L225 Difference]: With dead ends: 8673 [2019-11-06 22:24:47,535 INFO L226 Difference]: Without dead ends: 4813 [2019-11-06 22:24:47,566 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:24:47,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4813 states. [2019-11-06 22:24:47,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4813 to 4436. [2019-11-06 22:24:47,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4436 states. [2019-11-06 22:24:48,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4436 states to 4436 states and 6943 transitions. [2019-11-06 22:24:48,009 INFO L78 Accepts]: Start accepts. Automaton has 4436 states and 6943 transitions. Word has length 46 [2019-11-06 22:24:48,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:24:48,010 INFO L462 AbstractCegarLoop]: Abstraction has 4436 states and 6943 transitions. [2019-11-06 22:24:48,010 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:24:48,010 INFO L276 IsEmpty]: Start isEmpty. Operand 4436 states and 6943 transitions. [2019-11-06 22:24:48,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-11-06 22:24:48,018 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:24:48,019 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:24:48,019 INFO L410 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:24:48,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:24:48,019 INFO L82 PathProgramCache]: Analyzing trace with hash 168007946, now seen corresponding path program 1 times [2019-11-06 22:24:48,020 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:24:48,020 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390206990] [2019-11-06 22:24:48,020 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:24:48,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:48,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:48,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:48,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:48,193 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 22:24:48,193 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390206990] [2019-11-06 22:24:48,193 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653700810] [2019-11-06 22:24:48,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:24:48,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:48,326 INFO L256 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 22:24:48,343 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:24:48,386 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 22:24:48,386 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:24:48,386 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 7 [2019-11-06 22:24:48,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572606080] [2019-11-06 22:24:48,387 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:24:48,387 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:24:48,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:24:48,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:24:48,388 INFO L87 Difference]: Start difference. First operand 4436 states and 6943 transitions. Second operand 3 states. [2019-11-06 22:24:49,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:24:49,072 INFO L93 Difference]: Finished difference Result 9948 states and 15938 transitions. [2019-11-06 22:24:49,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:24:49,072 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2019-11-06 22:24:49,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:24:49,099 INFO L225 Difference]: With dead ends: 9948 [2019-11-06 22:24:49,099 INFO L226 Difference]: Without dead ends: 3229 [2019-11-06 22:24:49,127 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:24:49,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3229 states. [2019-11-06 22:24:49,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3229 to 3211. [2019-11-06 22:24:49,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3211 states. [2019-11-06 22:24:49,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3211 states to 3211 states and 4905 transitions. [2019-11-06 22:24:49,460 INFO L78 Accepts]: Start accepts. Automaton has 3211 states and 4905 transitions. Word has length 80 [2019-11-06 22:24:49,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:24:49,461 INFO L462 AbstractCegarLoop]: Abstraction has 3211 states and 4905 transitions. [2019-11-06 22:24:49,461 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:24:49,461 INFO L276 IsEmpty]: Start isEmpty. Operand 3211 states and 4905 transitions. [2019-11-06 22:24:49,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-11-06 22:24:49,475 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:24:49,475 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:24:49,681 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:24:49,682 INFO L410 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:24:49,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:24:49,683 INFO L82 PathProgramCache]: Analyzing trace with hash 342871604, now seen corresponding path program 1 times [2019-11-06 22:24:49,683 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:24:49,683 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128977182] [2019-11-06 22:24:49,684 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:24:49,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:49,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:49,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:49,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:49,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:49,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:49,938 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 22:24:49,938 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128977182] [2019-11-06 22:24:49,938 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835441576] [2019-11-06 22:24:49,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:24:50,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:50,088 INFO L256 TraceCheckSpWp]: Trace formula consists of 889 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:24:50,095 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:24:50,161 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 22:24:50,161 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:24:50,162 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-11-06 22:24:50,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948434835] [2019-11-06 22:24:50,163 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 22:24:50,163 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:24:50,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 22:24:50,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:24:50,164 INFO L87 Difference]: Start difference. First operand 3211 states and 4905 transitions. Second operand 9 states. [2019-11-06 22:24:50,470 WARN L191 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2019-11-06 22:24:53,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:24:53,069 INFO L93 Difference]: Finished difference Result 11482 states and 18309 transitions. [2019-11-06 22:24:53,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 22:24:53,070 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 121 [2019-11-06 22:24:53,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:24:53,114 INFO L225 Difference]: With dead ends: 11482 [2019-11-06 22:24:53,115 INFO L226 Difference]: Without dead ends: 8295 [2019-11-06 22:24:53,128 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2019-11-06 22:24:53,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8295 states. [2019-11-06 22:24:53,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8295 to 6562. [2019-11-06 22:24:53,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6562 states. [2019-11-06 22:24:53,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6562 states to 6562 states and 9883 transitions. [2019-11-06 22:24:53,760 INFO L78 Accepts]: Start accepts. Automaton has 6562 states and 9883 transitions. Word has length 121 [2019-11-06 22:24:53,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:24:53,762 INFO L462 AbstractCegarLoop]: Abstraction has 6562 states and 9883 transitions. [2019-11-06 22:24:53,762 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 22:24:53,762 INFO L276 IsEmpty]: Start isEmpty. Operand 6562 states and 9883 transitions. [2019-11-06 22:24:53,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-06 22:24:53,793 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:24:53,795 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:24:54,007 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:24:54,008 INFO L410 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:24:54,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:24:54,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1214473221, now seen corresponding path program 1 times [2019-11-06 22:24:54,008 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:24:54,008 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178109911] [2019-11-06 22:24:54,009 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:24:54,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:54,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:54,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:54,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:54,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:54,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:54,272 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-06 22:24:54,273 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178109911] [2019-11-06 22:24:54,273 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:24:54,273 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 22:24:54,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942370287] [2019-11-06 22:24:54,274 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 22:24:54,274 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:24:54,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 22:24:54,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:24:54,275 INFO L87 Difference]: Start difference. First operand 6562 states and 9883 transitions. Second operand 8 states. [2019-11-06 22:24:56,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:24:56,737 INFO L93 Difference]: Finished difference Result 20165 states and 30880 transitions. [2019-11-06 22:24:56,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 22:24:56,738 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 123 [2019-11-06 22:24:56,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:24:56,793 INFO L225 Difference]: With dead ends: 20165 [2019-11-06 22:24:56,793 INFO L226 Difference]: Without dead ends: 13612 [2019-11-06 22:24:56,808 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2019-11-06 22:24:56,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13612 states. [2019-11-06 22:24:57,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13612 to 10772. [2019-11-06 22:24:57,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10772 states. [2019-11-06 22:24:57,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10772 states to 10772 states and 16414 transitions. [2019-11-06 22:24:57,675 INFO L78 Accepts]: Start accepts. Automaton has 10772 states and 16414 transitions. Word has length 123 [2019-11-06 22:24:57,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:24:57,676 INFO L462 AbstractCegarLoop]: Abstraction has 10772 states and 16414 transitions. [2019-11-06 22:24:57,676 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 22:24:57,676 INFO L276 IsEmpty]: Start isEmpty. Operand 10772 states and 16414 transitions. [2019-11-06 22:24:57,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-11-06 22:24:57,721 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:24:57,721 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:24:57,722 INFO L410 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:24:57,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:24:57,722 INFO L82 PathProgramCache]: Analyzing trace with hash -637803730, now seen corresponding path program 1 times [2019-11-06 22:24:57,722 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:24:57,722 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487477874] [2019-11-06 22:24:57,723 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:24:57,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:57,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:57,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:57,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:57,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:57,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:58,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:58,042 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 22:24:58,042 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487477874] [2019-11-06 22:24:58,043 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457745762] [2019-11-06 22:24:58,043 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:24:58,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:58,270 INFO L256 TraceCheckSpWp]: Trace formula consists of 945 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 22:24:58,277 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:24:58,414 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 22:24:58,414 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:24:58,415 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2019-11-06 22:24:58,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549387011] [2019-11-06 22:24:58,419 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:24:58,419 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:24:58,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:24:58,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:24:58,420 INFO L87 Difference]: Start difference. First operand 10772 states and 16414 transitions. Second operand 3 states. [2019-11-06 22:24:59,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:24:59,472 INFO L93 Difference]: Finished difference Result 24980 states and 39939 transitions. [2019-11-06 22:24:59,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:24:59,473 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 132 [2019-11-06 22:24:59,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:24:59,556 INFO L225 Difference]: With dead ends: 24980 [2019-11-06 22:24:59,557 INFO L226 Difference]: Without dead ends: 14264 [2019-11-06 22:24:59,608 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:24:59,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14264 states. [2019-11-06 22:25:00,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14264 to 13982. [2019-11-06 22:25:00,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13982 states. [2019-11-06 22:25:00,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13982 states to 13982 states and 21395 transitions. [2019-11-06 22:25:00,555 INFO L78 Accepts]: Start accepts. Automaton has 13982 states and 21395 transitions. Word has length 132 [2019-11-06 22:25:00,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:25:00,555 INFO L462 AbstractCegarLoop]: Abstraction has 13982 states and 21395 transitions. [2019-11-06 22:25:00,555 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:25:00,556 INFO L276 IsEmpty]: Start isEmpty. Operand 13982 states and 21395 transitions. [2019-11-06 22:25:00,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-11-06 22:25:00,627 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:25:00,627 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:25:00,831 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:25:00,832 INFO L410 AbstractCegarLoop]: === Iteration 15 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:25:00,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:25:00,832 INFO L82 PathProgramCache]: Analyzing trace with hash 189968095, now seen corresponding path program 1 times [2019-11-06 22:25:00,833 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:25:00,833 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656243575] [2019-11-06 22:25:00,833 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:25:00,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:25:00,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:25:01,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:25:01,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:25:01,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:25:01,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:25:01,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:25:01,145 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 22:25:01,145 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656243575] [2019-11-06 22:25:01,145 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521712997] [2019-11-06 22:25:01,146 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:25:01,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:25:01,346 INFO L256 TraceCheckSpWp]: Trace formula consists of 947 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 22:25:01,354 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:25:01,419 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-06 22:25:01,419 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:25:01,419 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2019-11-06 22:25:01,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85002512] [2019-11-06 22:25:01,421 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:25:01,421 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:25:01,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:25:01,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:25:01,422 INFO L87 Difference]: Start difference. First operand 13982 states and 21395 transitions. Second operand 3 states.