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_label58.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:54:59,913 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:54:59,915 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:54:59,934 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:54:59,934 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:54:59,937 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:54:59,939 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:54:59,951 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:54:59,953 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:54:59,954 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:54:59,956 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:54:59,958 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:54:59,959 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:54:59,962 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:54:59,965 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:54:59,967 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:54:59,968 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:54:59,971 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:54:59,972 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:54:59,978 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:54:59,981 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:54:59,983 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:54:59,985 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:54:59,988 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:54:59,991 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:54:59,993 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:54:59,994 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:54:59,995 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:54:59,995 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:54:59,996 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:54:59,996 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:54:59,997 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:54:59,997 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:54:59,998 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:54:59,998 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:54:59,999 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:55:00,000 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 21:55:00,013 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:55:00,013 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:55:00,015 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:55:00,015 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:55:00,015 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:55:00,015 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:55:00,016 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:55:00,016 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:55:00,016 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:55:00,016 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:55:00,016 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:55:00,017 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:55:00,017 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:55:00,017 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:55:00,017 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:55:00,017 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:55:00,018 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:55:00,018 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:55:00,018 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:55:00,018 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:55:00,018 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:55:00,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:55:00,019 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:55:00,019 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:55:00,019 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:55:00,019 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:55:00,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:55:00,020 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:55:00,020 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:55:00,289 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:55:00,302 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:55:00,305 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:55:00,306 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:55:00,307 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:55:00,307 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label58.c [2019-10-14 21:55:00,392 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74b135c2e/df23b3b568504303863eab5c6fee7dc4/FLAG76e9a1922 [2019-10-14 21:55:01,046 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:55:01,047 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label58.c [2019-10-14 21:55:01,066 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74b135c2e/df23b3b568504303863eab5c6fee7dc4/FLAG76e9a1922 [2019-10-14 21:55:01,285 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74b135c2e/df23b3b568504303863eab5c6fee7dc4 [2019-10-14 21:55:01,293 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:55:01,295 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:55:01,296 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:55:01,296 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:55:01,299 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:55:01,300 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:55:01" (1/1) ... [2019-10-14 21:55:01,303 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53ed2c1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:01, skipping insertion in model container [2019-10-14 21:55:01,303 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:55:01" (1/1) ... [2019-10-14 21:55:01,311 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:55:01,396 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:55:02,177 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:55:02,194 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:55:02,530 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:55:02,564 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:55:02,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:02 WrapperNode [2019-10-14 21:55:02,567 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:55:02,568 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:55:02,568 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:55:02,569 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:55:02,589 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:02" (1/1) ... [2019-10-14 21:55:02,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:02" (1/1) ... [2019-10-14 21:55:02,639 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:02" (1/1) ... [2019-10-14 21:55:02,640 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:02" (1/1) ... [2019-10-14 21:55:02,699 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:02" (1/1) ... [2019-10-14 21:55:02,728 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:02" (1/1) ... [2019-10-14 21:55:02,743 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:02" (1/1) ... [2019-10-14 21:55:02,759 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:55:02,759 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:55:02,759 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:55:02,760 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:55:02,761 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:02" (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 21:55:02,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:55:02,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:55:02,835 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 21:55:02,835 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:55:02,835 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 21:55:02,836 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:55:02,836 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:55:02,836 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 21:55:02,837 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:55:02,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:55:02,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:55:04,864 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:55:04,865 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 21:55:04,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:55:04 BoogieIcfgContainer [2019-10-14 21:55:04,868 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:55:04,870 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:55:04,871 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:55:04,877 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:55:04,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:55:01" (1/3) ... [2019-10-14 21:55:04,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b062fd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:55:04, skipping insertion in model container [2019-10-14 21:55:04,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:02" (2/3) ... [2019-10-14 21:55:04,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b062fd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:55:04, skipping insertion in model container [2019-10-14 21:55:04,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:55:04" (3/3) ... [2019-10-14 21:55:04,893 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label58.c [2019-10-14 21:55:04,907 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:55:04,924 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:55:04,939 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:55:04,989 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:55:04,989 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:55:04,990 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:55:04,990 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:55:04,990 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:55:04,990 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:55:04,991 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:55:04,991 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:55:05,036 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-10-14 21:55:05,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-14 21:55:05,061 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:05,063 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] [2019-10-14 21:55:05,066 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:05,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:05,077 INFO L82 PathProgramCache]: Analyzing trace with hash 321643717, now seen corresponding path program 1 times [2019-10-14 21:55:05,088 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:05,089 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774486459] [2019-10-14 21:55:05,090 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:05,090 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:05,090 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:05,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:06,071 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:06,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:06,260 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 21:55:06,261 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774486459] [2019-10-14 21:55:06,262 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:55:06,262 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:55:06,262 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328183419] [2019-10-14 21:55:06,268 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:55:06,268 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:06,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:55:06,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:55:06,285 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 5 states. [2019-10-14 21:55:06,501 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:55:06,843 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2019-10-14 21:55:11,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:11,042 INFO L93 Difference]: Finished difference Result 1088 states and 1952 transitions. [2019-10-14 21:55:11,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:55:11,045 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 166 [2019-10-14 21:55:11,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:11,068 INFO L225 Difference]: With dead ends: 1088 [2019-10-14 21:55:11,068 INFO L226 Difference]: Without dead ends: 693 [2019-10-14 21:55:11,078 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:55:11,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2019-10-14 21:55:11,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 462. [2019-10-14 21:55:11,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 462 states. [2019-10-14 21:55:11,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 756 transitions. [2019-10-14 21:55:11,173 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 756 transitions. Word has length 166 [2019-10-14 21:55:11,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:55:11,174 INFO L462 AbstractCegarLoop]: Abstraction has 462 states and 756 transitions. [2019-10-14 21:55:11,174 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:55:11,175 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 756 transitions. [2019-10-14 21:55:11,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-10-14 21:55:11,181 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:11,181 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] [2019-10-14 21:55:11,181 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:11,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:11,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1821574551, now seen corresponding path program 1 times [2019-10-14 21:55:11,182 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:11,182 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076885231] [2019-10-14 21:55:11,183 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:11,183 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:11,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:11,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:11,400 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:11,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:11,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:11,631 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 21:55:11,632 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076885231] [2019-10-14 21:55:11,632 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:55:11,632 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 21:55:11,633 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171419451] [2019-10-14 21:55:11,638 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:55:11,638 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:11,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:55:11,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:55:11,639 INFO L87 Difference]: Start difference. First operand 462 states and 756 transitions. Second operand 9 states. [2019-10-14 21:55:11,825 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:55:14,624 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2019-10-14 21:55:15,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:15,561 INFO L93 Difference]: Finished difference Result 1431 states and 2473 transitions. [2019-10-14 21:55:15,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:55:15,561 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 182 [2019-10-14 21:55:15,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:15,570 INFO L225 Difference]: With dead ends: 1431 [2019-10-14 21:55:15,571 INFO L226 Difference]: Without dead ends: 975 [2019-10-14 21:55:15,573 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:55:15,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2019-10-14 21:55:15,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 914. [2019-10-14 21:55:15,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 914 states. [2019-10-14 21:55:15,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 1490 transitions. [2019-10-14 21:55:15,649 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 1490 transitions. Word has length 182 [2019-10-14 21:55:15,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:55:15,650 INFO L462 AbstractCegarLoop]: Abstraction has 914 states and 1490 transitions. [2019-10-14 21:55:15,650 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:55:15,650 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 1490 transitions. [2019-10-14 21:55:15,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-10-14 21:55:15,654 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:15,654 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] [2019-10-14 21:55:15,654 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:15,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:15,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1383589330, now seen corresponding path program 1 times [2019-10-14 21:55:15,655 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:15,655 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578376536] [2019-10-14 21:55:15,656 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:15,656 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:15,656 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:15,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:15,939 WARN L191 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:15,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:16,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:16,187 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 21:55:16,189 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578376536] [2019-10-14 21:55:16,193 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:55:16,194 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 21:55:16,194 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775814706] [2019-10-14 21:55:16,196 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:55:16,202 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:16,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:55:16,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:55:16,203 INFO L87 Difference]: Start difference. First operand 914 states and 1490 transitions. Second operand 8 states. [2019-10-14 21:55:16,359 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:55:16,740 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2019-10-14 21:55:19,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:19,861 INFO L93 Difference]: Finished difference Result 2782 states and 4815 transitions. [2019-10-14 21:55:19,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:55:19,862 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 183 [2019-10-14 21:55:19,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:19,876 INFO L225 Difference]: With dead ends: 2782 [2019-10-14 21:55:19,876 INFO L226 Difference]: Without dead ends: 1874 [2019-10-14 21:55:19,880 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:55:19,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1874 states. [2019-10-14 21:55:19,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1874 to 1804. [2019-10-14 21:55:19,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1804 states. [2019-10-14 21:55:19,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 2953 transitions. [2019-10-14 21:55:19,962 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 2953 transitions. Word has length 183 [2019-10-14 21:55:19,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:55:19,963 INFO L462 AbstractCegarLoop]: Abstraction has 1804 states and 2953 transitions. [2019-10-14 21:55:19,963 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:55:19,963 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 2953 transitions. [2019-10-14 21:55:19,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-10-14 21:55:19,969 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:19,969 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:55:19,969 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:19,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:19,970 INFO L82 PathProgramCache]: Analyzing trace with hash -819957242, now seen corresponding path program 1 times [2019-10-14 21:55:19,970 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:19,970 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076919744] [2019-10-14 21:55:19,970 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:19,971 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:19,971 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:19,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:20,150 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:20,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:20,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:20,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:20,361 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:55:20,362 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076919744] [2019-10-14 21:55:20,362 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946563671] [2019-10-14 21:55:20,362 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 21:55:20,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:20,632 INFO L256 TraceCheckSpWp]: Trace formula consists of 1018 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:55:20,648 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:55:20,776 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 21:55:20,777 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:55:20,777 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2019-10-14 21:55:20,777 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810033105] [2019-10-14 21:55:20,778 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:55:20,778 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:20,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:55:20,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:55:20,779 INFO L87 Difference]: Start difference. First operand 1804 states and 2953 transitions. Second operand 5 states. [2019-10-14 21:55:21,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:21,518 INFO L93 Difference]: Finished difference Result 5466 states and 9236 transitions. [2019-10-14 21:55:21,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:55:21,519 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 191 [2019-10-14 21:55:21,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:21,544 INFO L225 Difference]: With dead ends: 5466 [2019-10-14 21:55:21,544 INFO L226 Difference]: Without dead ends: 3668 [2019-10-14 21:55:21,551 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 190 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:55:21,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3668 states. [2019-10-14 21:55:21,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3668 to 3632. [2019-10-14 21:55:21,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3632 states. [2019-10-14 21:55:21,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3632 states to 3632 states and 6027 transitions. [2019-10-14 21:55:21,717 INFO L78 Accepts]: Start accepts. Automaton has 3632 states and 6027 transitions. Word has length 191 [2019-10-14 21:55:21,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:55:21,717 INFO L462 AbstractCegarLoop]: Abstraction has 3632 states and 6027 transitions. [2019-10-14 21:55:21,718 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:55:21,718 INFO L276 IsEmpty]: Start isEmpty. Operand 3632 states and 6027 transitions. [2019-10-14 21:55:21,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2019-10-14 21:55:21,727 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:21,728 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:55:21,933 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:55:21,933 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:21,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:21,934 INFO L82 PathProgramCache]: Analyzing trace with hash -726658347, now seen corresponding path program 1 times [2019-10-14 21:55:21,934 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:21,934 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167218866] [2019-10-14 21:55:21,935 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:21,935 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:21,935 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:21,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:22,218 WARN L191 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:22,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:22,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:22,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:22,606 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:55:22,606 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167218866] [2019-10-14 21:55:22,606 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46737485] [2019-10-14 21:55:22,607 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 21:55:22,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:22,805 INFO L256 TraceCheckSpWp]: Trace formula consists of 1021 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:55:22,828 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:55:22,924 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 21:55:22,924 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:55:22,924 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4] total 12 [2019-10-14 21:55:22,924 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984780859] [2019-10-14 21:55:22,925 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:55:22,926 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:22,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:55:22,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:55:22,927 INFO L87 Difference]: Start difference. First operand 3632 states and 6027 transitions. Second operand 12 states. [2019-10-14 21:55:23,088 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2019-10-14 21:55:23,440 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2019-10-14 21:55:24,827 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:55:25,467 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2019-10-14 21:55:28,700 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2019-10-14 21:55:34,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:34,165 INFO L93 Difference]: Finished difference Result 23010 states and 59817 transitions. [2019-10-14 21:55:34,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-10-14 21:55:34,166 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 194 [2019-10-14 21:55:34,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:34,432 INFO L225 Difference]: With dead ends: 23010 [2019-10-14 21:55:34,432 INFO L226 Difference]: Without dead ends: 19384 [2019-10-14 21:55:34,490 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=583, Invalid=2279, Unknown=0, NotChecked=0, Total=2862 [2019-10-14 21:55:34,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19384 states. [2019-10-14 21:55:35,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19384 to 17941. [2019-10-14 21:55:35,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17941 states. [2019-10-14 21:55:35,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17941 states to 17941 states and 28736 transitions. [2019-10-14 21:55:35,838 INFO L78 Accepts]: Start accepts. Automaton has 17941 states and 28736 transitions. Word has length 194 [2019-10-14 21:55:35,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:55:35,838 INFO L462 AbstractCegarLoop]: Abstraction has 17941 states and 28736 transitions. [2019-10-14 21:55:35,838 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:55:35,838 INFO L276 IsEmpty]: Start isEmpty. Operand 17941 states and 28736 transitions. [2019-10-14 21:55:35,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2019-10-14 21:55:35,869 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:35,869 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:55:36,075 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:55:36,075 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:36,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:36,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1594299078, now seen corresponding path program 1 times [2019-10-14 21:55:36,076 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:36,076 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494205568] [2019-10-14 21:55:36,076 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:36,077 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:36,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:36,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:36,393 WARN L191 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:36,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:36,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:36,657 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:55:36,657 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494205568] [2019-10-14 21:55:36,657 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:55:36,658 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 21:55:36,658 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107477198] [2019-10-14 21:55:36,658 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:55:36,659 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:36,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:55:36,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:55:36,659 INFO L87 Difference]: Start difference. First operand 17941 states and 28736 transitions. Second operand 9 states. [2019-10-14 21:55:36,842 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 129