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/eca-rers2012/Problem03_label56.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:54:59,030 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:54:59,033 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:54:59,053 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:54:59,054 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:54:59,056 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:54:59,057 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:54:59,069 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:54:59,071 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:54:59,072 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:54:59,073 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:54:59,074 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:54:59,074 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:54:59,077 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:54:59,079 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:54:59,080 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:54:59,081 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:54:59,082 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:54:59,083 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:54:59,085 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:54:59,087 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:54:59,088 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:54:59,089 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:54:59,090 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:54:59,092 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:54:59,094 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:54:59,095 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:54:59,096 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:54:59,097 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:54:59,098 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:54:59,098 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:54:59,098 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:54:59,099 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:54:59,099 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:54:59,100 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:54:59,100 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:54:59,101 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:54:59,115 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:54:59,115 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:54:59,116 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:54:59,117 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:54:59,117 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:54:59,117 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:54:59,117 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:54:59,118 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:54:59,118 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:54:59,118 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:54:59,118 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:54:59,118 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:54:59,119 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:54:59,119 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:54:59,119 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:54:59,119 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:54:59,119 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:54:59,120 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:54:59,120 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:54:59,120 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:54:59,120 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:54:59,120 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:54:59,121 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:54:59,121 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:54:59,121 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:54:59,121 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:54:59,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:54:59,121 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:54:59,122 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:54:59,393 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:54:59,406 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:54:59,409 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:54:59,411 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:54:59,411 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:54:59,412 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label56.c [2019-10-14 21:54:59,474 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6097296eb/2eb60a4bd7ee40598755980f79a5763a/FLAG814891aaf [2019-10-14 21:55:00,111 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:55:00,112 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label56.c [2019-10-14 21:55:00,133 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6097296eb/2eb60a4bd7ee40598755980f79a5763a/FLAG814891aaf [2019-10-14 21:55:00,334 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6097296eb/2eb60a4bd7ee40598755980f79a5763a [2019-10-14 21:55:00,344 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:55:00,346 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:55:00,347 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:55:00,347 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:55:00,351 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:55:00,352 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:55:00" (1/1) ... [2019-10-14 21:55:00,355 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76f51de0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:00, skipping insertion in model container [2019-10-14 21:55:00,355 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:55:00" (1/1) ... [2019-10-14 21:55:00,363 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:55:00,429 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:55:01,227 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:55:01,242 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:55:01,641 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:55:01,669 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:55:01,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:01 WrapperNode [2019-10-14 21:55:01,670 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:55:01,671 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:55:01,671 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:55:01,672 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:55:01,689 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:01" (1/1) ... [2019-10-14 21:55:01,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:01" (1/1) ... [2019-10-14 21:55:01,731 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:01" (1/1) ... [2019-10-14 21:55:01,731 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:01" (1/1) ... [2019-10-14 21:55:01,781 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:01" (1/1) ... [2019-10-14 21:55:01,810 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:01" (1/1) ... [2019-10-14 21:55:01,825 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:01" (1/1) ... [2019-10-14 21:55:01,839 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:55:01,840 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:55:01,840 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:55:01,840 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:55:01,841 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:55:01,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:55:01,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:55:01,908 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 21:55:01,908 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:55:01,909 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 21:55:01,909 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:55:01,909 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:55:01,909 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 21:55:01,911 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:55:01,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:55:01,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:55:03,953 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:55:03,954 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 21:55:03,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:55:03 BoogieIcfgContainer [2019-10-14 21:55:03,960 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:55:03,965 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:55:03,965 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:55:03,972 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:55:03,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:55:00" (1/3) ... [2019-10-14 21:55:03,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61c53df7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:55:03, skipping insertion in model container [2019-10-14 21:55:03,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:01" (2/3) ... [2019-10-14 21:55:03,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61c53df7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:55:03, skipping insertion in model container [2019-10-14 21:55:03,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:55:03" (3/3) ... [2019-10-14 21:55:03,980 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label56.c [2019-10-14 21:55:03,995 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:55:04,009 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:55:04,022 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:55:04,075 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:55:04,075 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:55:04,075 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:55:04,075 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:55:04,076 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:55:04,076 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:55:04,076 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:55:04,077 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:55:04,127 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-10-14 21:55:04,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-10-14 21:55:04,155 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:04,157 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:55:04,159 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:04,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:04,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1923555504, now seen corresponding path program 1 times [2019-10-14 21:55:04,179 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:04,180 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788582535] [2019-10-14 21:55:04,181 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:04,181 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:04,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:04,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:05,221 WARN L191 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:05,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:05,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:55:05,403 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788582535] [2019-10-14 21:55:05,404 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:55:05,405 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:55:05,405 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779898230] [2019-10-14 21:55:05,410 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:55:05,411 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:05,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:55:05,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:55:05,428 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 5 states. [2019-10-14 21:55:05,764 WARN L191 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:55:06,309 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-10-14 21:55:10,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:10,219 INFO L93 Difference]: Finished difference Result 1111 states and 1980 transitions. [2019-10-14 21:55:10,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:55:10,221 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 179 [2019-10-14 21:55:10,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:10,245 INFO L225 Difference]: With dead ends: 1111 [2019-10-14 21:55:10,246 INFO L226 Difference]: Without dead ends: 703 [2019-10-14 21:55:10,255 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:55:10,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2019-10-14 21:55:10,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 467. [2019-10-14 21:55:10,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 467 states. [2019-10-14 21:55:10,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 718 transitions. [2019-10-14 21:55:10,376 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 718 transitions. Word has length 179 [2019-10-14 21:55:10,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:55:10,380 INFO L462 AbstractCegarLoop]: Abstraction has 467 states and 718 transitions. [2019-10-14 21:55:10,380 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:55:10,381 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 718 transitions. [2019-10-14 21:55:10,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-10-14 21:55:10,396 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:10,396 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:55:10,396 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:10,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:10,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1452588996, now seen corresponding path program 1 times [2019-10-14 21:55:10,397 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:10,397 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312372297] [2019-10-14 21:55:10,398 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:10,398 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:10,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:10,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:10,705 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:10,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:10,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:10,866 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:55:10,867 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312372297] [2019-10-14 21:55:10,867 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735961958] [2019-10-14 21:55:10,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:55:11,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:11,110 INFO L256 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:55:11,124 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:55:11,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:55:11,238 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:55:11,238 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-14 21:55:11,238 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349340597] [2019-10-14 21:55:11,242 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:55:11,243 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:11,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:55:11,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:55:11,243 INFO L87 Difference]: Start difference. First operand 467 states and 718 transitions. Second operand 3 states. [2019-10-14 21:55:12,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:12,339 INFO L93 Difference]: Finished difference Result 1351 states and 2102 transitions. [2019-10-14 21:55:12,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:55:12,339 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 191 [2019-10-14 21:55:12,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:12,347 INFO L225 Difference]: With dead ends: 1351 [2019-10-14 21:55:12,347 INFO L226 Difference]: Without dead ends: 890 [2019-10-14 21:55:12,350 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:55:12,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2019-10-14 21:55:12,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 888. [2019-10-14 21:55:12,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 888 states. [2019-10-14 21:55:12,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1219 transitions. [2019-10-14 21:55:12,450 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1219 transitions. Word has length 191 [2019-10-14 21:55:12,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:55:12,452 INFO L462 AbstractCegarLoop]: Abstraction has 888 states and 1219 transitions. [2019-10-14 21:55:12,452 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:55:12,452 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1219 transitions. [2019-10-14 21:55:12,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2019-10-14 21:55:12,458 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:12,459 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:55:12,665 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:55:12,666 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:12,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:12,667 INFO L82 PathProgramCache]: Analyzing trace with hash 128275852, now seen corresponding path program 1 times [2019-10-14 21:55:12,668 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:12,668 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774970550] [2019-10-14 21:55:12,669 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:12,672 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:12,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:12,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:13,008 WARN L191 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:13,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:13,139 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-10-14 21:55:13,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:13,315 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:55:13,316 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774970550] [2019-10-14 21:55:13,316 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:55:13,317 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 21:55:13,318 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580493448] [2019-10-14 21:55:13,319 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:55:13,319 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:13,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:55:13,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:55:13,320 INFO L87 Difference]: Start difference. First operand 888 states and 1219 transitions. Second operand 9 states. [2019-10-14 21:55:13,522 WARN L191 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:55:16,046 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2019-10-14 21:55:16,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:16,904 INFO L93 Difference]: Finished difference Result 2746 states and 4151 transitions. [2019-10-14 21:55:16,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:55:16,904 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 195 [2019-10-14 21:55:16,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:16,920 INFO L225 Difference]: With dead ends: 2746 [2019-10-14 21:55:16,921 INFO L226 Difference]: Without dead ends: 1864 [2019-10-14 21:55:16,924 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:55:16,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2019-10-14 21:55:16,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1782. [2019-10-14 21:55:16,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1782 states. [2019-10-14 21:55:17,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 2478 transitions. [2019-10-14 21:55:17,003 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 2478 transitions. Word has length 195 [2019-10-14 21:55:17,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:55:17,003 INFO L462 AbstractCegarLoop]: Abstraction has 1782 states and 2478 transitions. [2019-10-14 21:55:17,004 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:55:17,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 2478 transitions. [2019-10-14 21:55:17,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2019-10-14 21:55:17,010 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:17,010 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:55:17,010 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:17,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:17,011 INFO L82 PathProgramCache]: Analyzing trace with hash -991429437, now seen corresponding path program 1 times [2019-10-14 21:55:17,011 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:17,011 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715964344] [2019-10-14 21:55:17,012 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:17,012 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:17,012 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:17,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:17,236 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:17,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:17,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:17,506 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:55:17,506 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715964344] [2019-10-14 21:55:17,507 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:55:17,507 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 21:55:17,507 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513825634] [2019-10-14 21:55:17,508 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:55:17,509 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:17,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:55:17,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:55:17,510 INFO L87 Difference]: Start difference. First operand 1782 states and 2478 transitions. Second operand 8 states. [2019-10-14 21:55:17,671 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:55:18,173 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2019-10-14 21:55:21,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:21,269 INFO L93 Difference]: Finished difference Result 5436 states and 8296 transitions. [2019-10-14 21:55:21,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:55:21,270 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 196 [2019-10-14 21:55:21,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:21,302 INFO L225 Difference]: With dead ends: 5436 [2019-10-14 21:55:21,302 INFO L226 Difference]: Without dead ends: 3660 [2019-10-14 21:55:21,309 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:55:21,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3660 states. [2019-10-14 21:55:21,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3660 to 3565. [2019-10-14 21:55:21,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3565 states. [2019-10-14 21:55:21,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3565 states to 3565 states and 5046 transitions. [2019-10-14 21:55:21,465 INFO L78 Accepts]: Start accepts. Automaton has 3565 states and 5046 transitions. Word has length 196 [2019-10-14 21:55:21,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:55:21,466 INFO L462 AbstractCegarLoop]: Abstraction has 3565 states and 5046 transitions. [2019-10-14 21:55:21,466 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:55:21,466 INFO L276 IsEmpty]: Start isEmpty. Operand 3565 states and 5046 transitions. [2019-10-14 21:55:21,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2019-10-14 21:55:21,479 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:21,480 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:55:21,480 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:21,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:21,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1265853156, now seen corresponding path program 1 times [2019-10-14 21:55:21,481 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:21,481 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256944745] [2019-10-14 21:55:21,481 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:21,482 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:21,482 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:21,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:21,687 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:21,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:21,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:21,969 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:55:21,970 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256944745] [2019-10-14 21:55:21,970 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:55:21,970 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 21:55:21,971 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067159160] [2019-10-14 21:55:21,971 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:55:21,972 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:21,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:55:21,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:55:21,973 INFO L87 Difference]: Start difference. First operand 3565 states and 5046 transitions. Second operand 9 states. [2019-10-14 21:55:22,126 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:55:22,598 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:55:24,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:24,900 INFO L93 Difference]: Finished difference Result 7233 states and 10660 transitions. [2019-10-14 21:55:24,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:55:24,901 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 203 [2019-10-14 21:55:24,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:24,924 INFO L225 Difference]: With dead ends: 7233 [2019-10-14 21:55:24,924 INFO L226 Difference]: Without dead ends: 3674 [2019-10-14 21:55:24,936 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:55:24,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3674 states. [2019-10-14 21:55:25,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3674 to 3603. [2019-10-14 21:55:25,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3603 states. [2019-10-14 21:55:25,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3603 states to 3603 states and 4999 transitions. [2019-10-14 21:55:25,057 INFO L78 Accepts]: Start accepts. Automaton has 3603 states and 4999 transitions. Word has length 203 [2019-10-14 21:55:25,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:55:25,057 INFO L462 AbstractCegarLoop]: Abstraction has 3603 states and 4999 transitions. [2019-10-14 21:55:25,057 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:55:25,058 INFO L276 IsEmpty]: Start isEmpty. Operand 3603 states and 4999 transitions. [2019-10-14 21:55:25,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2019-10-14 21:55:25,123 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:25,125 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:55:25,129 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:25,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:25,131 INFO L82 PathProgramCache]: Analyzing trace with hash 890454064, now seen corresponding path program 1 times [2019-10-14 21:55:25,131 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:25,132 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905665858] [2019-10-14 21:55:25,132 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:25,133 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:25,133 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:25,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:25,343 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:25,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:25,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:25,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:25,559 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:55:25,560 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905665858] [2019-10-14 21:55:25,560 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882605211] [2019-10-14 21:55:25,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:55:25,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:25,753 INFO L256 TraceCheckSpWp]: Trace formula consists of 1041 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:55:25,764 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:55:25,846 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:55:25,847 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:55:25,847 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-10-14 21:55:25,847 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869600833] [2019-10-14 21:55:25,848 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:55:25,848 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:25,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:55:25,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:55:25,849 INFO L87 Difference]: Start difference. First operand 3603 states and 4999 transitions. Second operand 3 states. [2019-10-14 21:55:26,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:26,904 INFO L93 Difference]: Finished difference Result 8911 states and 12854 transitions. [2019-10-14 21:55:26,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:55:26,905 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 215 [2019-10-14 21:55:26,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:26,930 INFO L225 Difference]: With dead ends: 8911 [2019-10-14 21:55:26,930 INFO L226 Difference]: Without dead ends: 5314 [2019-10-14 21:55:26,941 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:55:26,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5314 states. [2019-10-14 21:55:27,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5314 to 5311. [2019-10-14 21:55:27,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5311 states. [2019-10-14 21:55:27,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5311 states to 5311 states and 7667 transitions. [2019-10-14 21:55:27,081 INFO L78 Accepts]: Start accepts. Automaton has 5311 states and 7667 transitions. Word has length 215 [2019-10-14 21:55:27,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:55:27,081 INFO L462 AbstractCegarLoop]: Abstraction has 5311 states and 7667 transitions. [2019-10-14 21:55:27,081 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:55:27,082 INFO L276 IsEmpty]: Start isEmpty. Operand 5311 states and 7667 transitions. [2019-10-14 21:55:27,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2019-10-14 21:55:27,098 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:27,098 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:55:27,311 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:55:27,311 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:27,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:27,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1791765692, now seen corresponding path program 1 times [2019-10-14 21:55:27,312 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:27,312 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4254444] [2019-10-14 21:55:27,313 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:27,313 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:27,313 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:27,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:27,532 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:27,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:27,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:27,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:27,734 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:55:27,735 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4254444] [2019-10-14 21:55:27,736 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038445686] [2019-10-14 21:55:27,736 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:55:27,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:27,921 INFO L256 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:55:27,936 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:55:27,985 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 21:55:27,985 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:55:27,986 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-14 21:55:27,986 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096210282] [2019-10-14 21:55:27,986 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:55:27,987 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:27,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:55:27,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:55:27,987 INFO L87 Difference]: Start difference. First operand 5311 states and 7667 transitions. Second operand 5 states. [2019-10-14 21:55:29,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:29,493 INFO L93 Difference]: Finished difference Result 10747 states and 16175 transitions. [2019-10-14 21:55:29,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:55:29,494 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 223 [2019-10-14 21:55:29,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:29,521 INFO L225 Difference]: With dead ends: 10747 [2019-10-14 21:55:29,521 INFO L226 Difference]: Without dead ends: 5442 [2019-10-14 21:55:29,535 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 223 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:55:29,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5442 states. [2019-10-14 21:55:29,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5442 to 5355. [2019-10-14 21:55:29,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5355 states. [2019-10-14 21:55:29,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5355 states to 5355 states and 7127 transitions. [2019-10-14 21:55:29,707 INFO L78 Accepts]: Start accepts. Automaton has 5355 states and 7127 transitions. Word has length 223 [2019-10-14 21:55:29,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:55:29,707 INFO L462 AbstractCegarLoop]: Abstraction has 5355 states and 7127 transitions. [2019-10-14 21:55:29,707 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:55:29,707 INFO L276 IsEmpty]: Start isEmpty. Operand 5355 states and 7127 transitions. [2019-10-14 21:55:29,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2019-10-14 21:55:29,724 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:29,724 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:55:29,929 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:55:29,930 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:29,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:29,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1498504574, now seen corresponding path program 1 times [2019-10-14 21:55:29,930 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:29,932 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712915857] [2019-10-14 21:55:29,932 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:29,932 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:29,932 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:29,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:30,230 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:30,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:30,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:30,404 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 41 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:55:30,404 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712915857] [2019-10-14 21:55:30,408 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908331953] [2019-10-14 21:55:30,408 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 [2019-10-14 21:55:30,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:30,587 INFO L256 TraceCheckSpWp]: Trace formula consists of 884 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:55:30,644 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:55:30,710 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:55:30,711 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:55:30,711 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-14 21:55:30,712 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314616240] [2019-10-14 21:55:30,712 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:55:30,713 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:30,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:55:30,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:55:30,713 INFO L87 Difference]: Start difference. First operand 5355 states and 7127 transitions. Second operand 3 states. [2019-10-14 21:55:31,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:31,834 INFO L93 Difference]: Finished difference Result 15628 states and 21373 transitions. [2019-10-14 21:55:31,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:55:31,835 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 224 [2019-10-14 21:55:31,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:31,882 INFO L225 Difference]: With dead ends: 15628 [2019-10-14 21:55:31,882 INFO L226 Difference]: Without dead ends: 10279 [2019-10-14 21:55:31,897 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:55:31,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10279 states. [2019-10-14 21:55:32,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10279 to 10234. [2019-10-14 21:55:32,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10234 states. [2019-10-14 21:55:32,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10234 states to 10234 states and 13887 transitions. [2019-10-14 21:55:32,165 INFO L78 Accepts]: Start accepts. Automaton has 10234 states and 13887 transitions. Word has length 224 [2019-10-14 21:55:32,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:55:32,166 INFO L462 AbstractCegarLoop]: Abstraction has 10234 states and 13887 transitions. [2019-10-14 21:55:32,166 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:55:32,166 INFO L276 IsEmpty]: Start isEmpty. Operand 10234 states and 13887 transitions. [2019-10-14 21:55:32,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2019-10-14 21:55:32,205 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:32,205 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:55:32,412 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:55:32,412 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:32,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:32,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1178799309, now seen corresponding path program 1 times [2019-10-14 21:55:32,413 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:32,413 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822064975] [2019-10-14 21:55:32,413 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:32,413 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:32,413 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:32,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:32,649 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:32,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:32,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:32,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:32,930 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 44 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:55:32,930 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822064975] [2019-10-14 21:55:32,930 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855532209] [2019-10-14 21:55:32,930 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:55:33,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:33,125 INFO L256 TraceCheckSpWp]: Trace formula consists of 1040 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:55:33,130 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:55:33,197 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 21:55:33,197 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:55:33,198 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2019-10-14 21:55:33,198 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700467615] [2019-10-14 21:55:33,199 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:55:33,199 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:33,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:55:33,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:55:33,199 INFO L87 Difference]: Start difference. First operand 10234 states and 13887 transitions. Second operand 5 states.