/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_strcpy_original-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:35:06,855 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:35:06,858 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:35:06,870 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:35:06,870 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:35:06,871 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:35:06,873 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:35:06,875 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:35:06,876 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:35:06,877 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:35:06,878 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:35:06,879 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:35:06,880 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:35:06,881 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:35:06,882 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:35:06,883 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:35:06,884 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:35:06,885 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:35:06,887 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:35:06,889 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:35:06,890 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:35:06,892 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:35:06,893 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:35:06,893 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:35:06,896 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:35:06,899 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 20:35:06,900 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 20:35:06,900 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 20:35:06,901 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 20:35:06,902 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 20:35:06,902 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 20:35:06,903 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 20:35:06,903 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 20:35:06,904 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:35:06,905 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:35:06,905 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:35:06,906 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 20:35:06,921 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:35:06,921 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:35:06,922 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:35:06,922 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:35:06,923 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:35:06,923 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:35:06,923 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:35:06,923 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:35:06,923 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:35:06,924 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:35:06,924 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:35:06,924 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:35:06,924 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:35:06,924 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:35:06,925 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:35:06,925 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:35:06,925 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:35:06,925 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:35:06,925 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:35:06,926 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:35:06,926 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:35:06,926 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:35:06,926 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:35:06,926 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:35:06,927 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:35:06,927 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:35:06,927 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:35:06,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:35:06,928 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:35:06,928 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:35:07,229 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:35:07,242 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:35:07,245 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:35:07,246 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:35:07,246 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:35:07,247 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_strcpy_original-2.i [2019-11-23 20:35:07,319 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dba04b4e8/7ad5fa08d66f4dd0b188fcbbd21b1bc0/FLAGb4d0cec5a [2019-11-23 20:35:07,802 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:35:07,803 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_strcpy_original-2.i [2019-11-23 20:35:07,809 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dba04b4e8/7ad5fa08d66f4dd0b188fcbbd21b1bc0/FLAGb4d0cec5a [2019-11-23 20:35:08,137 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dba04b4e8/7ad5fa08d66f4dd0b188fcbbd21b1bc0 [2019-11-23 20:35:08,144 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:35:08,146 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:35:08,147 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:35:08,147 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:35:08,151 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:35:08,152 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:35:08" (1/1) ... [2019-11-23 20:35:08,155 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@577254a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:08, skipping insertion in model container [2019-11-23 20:35:08,155 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:35:08" (1/1) ... [2019-11-23 20:35:08,164 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:35:08,183 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:35:08,357 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:35:08,362 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:35:08,385 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:35:08,406 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:35:08,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:08 WrapperNode [2019-11-23 20:35:08,407 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:35:08,407 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:35:08,407 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:35:08,407 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:35:08,414 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:08" (1/1) ... [2019-11-23 20:35:08,514 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:08" (1/1) ... [2019-11-23 20:35:08,547 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:35:08,547 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:35:08,547 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:35:08,548 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:35:08,557 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:08" (1/1) ... [2019-11-23 20:35:08,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:08" (1/1) ... [2019-11-23 20:35:08,559 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:08" (1/1) ... [2019-11-23 20:35:08,560 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:08" (1/1) ... [2019-11-23 20:35:08,565 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:08" (1/1) ... [2019-11-23 20:35:08,570 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:08" (1/1) ... [2019-11-23 20:35:08,572 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:08" (1/1) ... [2019-11-23 20:35:08,574 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:35:08,574 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:35:08,574 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:35:08,575 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:35:08,575 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:35:08,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:35:08,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:35:08,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:35:08,640 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:35:08,640 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:35:08,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:35:08,869 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:35:08,869 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 20:35:08,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:35:08 BoogieIcfgContainer [2019-11-23 20:35:08,871 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:35:08,872 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:35:08,872 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:35:08,875 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:35:08,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:35:08" (1/3) ... [2019-11-23 20:35:08,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b8e8d65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:35:08, skipping insertion in model container [2019-11-23 20:35:08,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:08" (2/3) ... [2019-11-23 20:35:08,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b8e8d65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:35:08, skipping insertion in model container [2019-11-23 20:35:08,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:35:08" (3/3) ... [2019-11-23 20:35:08,878 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_strcpy_original-2.i [2019-11-23 20:35:08,888 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:35:08,896 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:35:08,909 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:35:08,938 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:35:08,938 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:35:08,939 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:35:08,939 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:35:08,939 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:35:08,940 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:35:08,940 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:35:08,940 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:35:08,964 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-11-23 20:35:08,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 20:35:08,972 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:08,973 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:08,974 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:08,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:08,982 INFO L82 PathProgramCache]: Analyzing trace with hash 112467144, now seen corresponding path program 1 times [2019-11-23 20:35:08,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:08,995 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662530207] [2019-11-23 20:35:08,995 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:09,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:09,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:35:09,130 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662530207] [2019-11-23 20:35:09,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:35:09,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:35:09,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856307113] [2019-11-23 20:35:09,137 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:35:09,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:09,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:35:09,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:35:09,155 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2019-11-23 20:35:09,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:09,173 INFO L93 Difference]: Finished difference Result 33 states and 47 transitions. [2019-11-23 20:35:09,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:35:09,175 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-23 20:35:09,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:09,183 INFO L225 Difference]: With dead ends: 33 [2019-11-23 20:35:09,183 INFO L226 Difference]: Without dead ends: 14 [2019-11-23 20:35:09,186 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:35:09,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-23 20:35:09,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-23 20:35:09,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-23 20:35:09,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2019-11-23 20:35:09,219 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 10 [2019-11-23 20:35:09,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:09,220 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2019-11-23 20:35:09,220 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:35:09,220 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2019-11-23 20:35:09,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 20:35:09,221 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:09,221 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:09,222 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:09,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:09,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1877798305, now seen corresponding path program 1 times [2019-11-23 20:35:09,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:09,223 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446885482] [2019-11-23 20:35:09,223 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:09,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:09,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:35:09,275 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446885482] [2019-11-23 20:35:09,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:35:09,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:35:09,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858805453] [2019-11-23 20:35:09,277 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:35:09,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:09,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:35:09,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:35:09,279 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand 3 states. [2019-11-23 20:35:09,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:09,300 INFO L93 Difference]: Finished difference Result 26 states and 34 transitions. [2019-11-23 20:35:09,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:35:09,300 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-23 20:35:09,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:09,301 INFO L225 Difference]: With dead ends: 26 [2019-11-23 20:35:09,301 INFO L226 Difference]: Without dead ends: 15 [2019-11-23 20:35:09,302 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:35:09,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-23 20:35:09,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-23 20:35:09,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-23 20:35:09,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2019-11-23 20:35:09,308 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 12 [2019-11-23 20:35:09,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:09,308 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2019-11-23 20:35:09,308 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:35:09,308 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2019-11-23 20:35:09,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 20:35:09,309 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:09,309 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:09,310 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:09,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:09,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1363852218, now seen corresponding path program 1 times [2019-11-23 20:35:09,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:09,311 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723947126] [2019-11-23 20:35:09,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:09,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:09,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:35:09,392 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723947126] [2019-11-23 20:35:09,392 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33595847] [2019-11-23 20:35:09,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:09,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:09,464 INFO L255 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:35:09,472 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:09,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:35:09,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:09,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:35:09,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651787601] [2019-11-23 20:35:09,500 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:35:09,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:09,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:35:09,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:35:09,502 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand 5 states. [2019-11-23 20:35:09,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:09,523 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2019-11-23 20:35:09,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:35:09,524 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-11-23 20:35:09,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:09,525 INFO L225 Difference]: With dead ends: 27 [2019-11-23 20:35:09,532 INFO L226 Difference]: Without dead ends: 16 [2019-11-23 20:35:09,533 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:35:09,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-23 20:35:09,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-23 20:35:09,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-23 20:35:09,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2019-11-23 20:35:09,541 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 13 [2019-11-23 20:35:09,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:09,541 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2019-11-23 20:35:09,541 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:35:09,542 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2019-11-23 20:35:09,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 20:35:09,543 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:09,543 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:09,747 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:09,752 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:09,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:09,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1224196673, now seen corresponding path program 2 times [2019-11-23 20:35:09,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:09,753 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718479602] [2019-11-23 20:35:09,754 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:09,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:09,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:35:09,827 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718479602] [2019-11-23 20:35:09,829 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770422108] [2019-11-23 20:35:09,829 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:09,884 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-23 20:35:09,884 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:09,885 INFO L255 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:35:09,888 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:09,999 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:35:10,021 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 20:35:10,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:35:10,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 10 [2019-11-23 20:35:10,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168089147] [2019-11-23 20:35:10,023 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:35:10,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:10,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:35:10,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:35:10,025 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 7 states. [2019-11-23 20:35:10,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:10,191 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2019-11-23 20:35:10,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:35:10,193 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2019-11-23 20:35:10,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:10,195 INFO L225 Difference]: With dead ends: 41 [2019-11-23 20:35:10,195 INFO L226 Difference]: Without dead ends: 28 [2019-11-23 20:35:10,196 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:35:10,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-23 20:35:10,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2019-11-23 20:35:10,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-23 20:35:10,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2019-11-23 20:35:10,222 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 14 [2019-11-23 20:35:10,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:10,222 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2019-11-23 20:35:10,223 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:35:10,223 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2019-11-23 20:35:10,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 20:35:10,223 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:10,224 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:10,427 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:10,428 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:10,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:10,428 INFO L82 PathProgramCache]: Analyzing trace with hash 414850047, now seen corresponding path program 1 times [2019-11-23 20:35:10,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:10,429 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518205637] [2019-11-23 20:35:10,429 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:10,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:10,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 20:35:10,475 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518205637] [2019-11-23 20:35:10,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:35:10,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:35:10,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519107526] [2019-11-23 20:35:10,476 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:35:10,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:10,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:35:10,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:35:10,478 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 4 states. [2019-11-23 20:35:10,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:10,536 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2019-11-23 20:35:10,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:35:10,537 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-11-23 20:35:10,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:10,538 INFO L225 Difference]: With dead ends: 37 [2019-11-23 20:35:10,538 INFO L226 Difference]: Without dead ends: 26 [2019-11-23 20:35:10,539 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:35:10,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-23 20:35:10,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 19. [2019-11-23 20:35:10,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-23 20:35:10,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2019-11-23 20:35:10,543 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 14 [2019-11-23 20:35:10,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:10,543 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2019-11-23 20:35:10,544 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:35:10,544 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2019-11-23 20:35:10,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:35:10,544 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:10,545 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:10,545 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:10,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:10,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1444694637, now seen corresponding path program 1 times [2019-11-23 20:35:10,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:10,546 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741771085] [2019-11-23 20:35:10,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:10,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:10,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 20:35:10,609 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741771085] [2019-11-23 20:35:10,610 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513147790] [2019-11-23 20:35:10,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:10,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:10,658 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:35:10,660 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:10,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 20:35:10,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:10,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 20:35:10,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074696194] [2019-11-23 20:35:10,674 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:35:10,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:10,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:35:10,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:35:10,675 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 6 states. [2019-11-23 20:35:10,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:10,692 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2019-11-23 20:35:10,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:35:10,693 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2019-11-23 20:35:10,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:10,694 INFO L225 Difference]: With dead ends: 34 [2019-11-23 20:35:10,694 INFO L226 Difference]: Without dead ends: 20 [2019-11-23 20:35:10,695 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:35:10,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-23 20:35:10,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-23 20:35:10,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-23 20:35:10,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-11-23 20:35:10,699 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 17 [2019-11-23 20:35:10,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:10,699 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-11-23 20:35:10,699 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:35:10,699 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-11-23 20:35:10,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-23 20:35:10,700 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:10,700 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:10,903 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:10,904 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:10,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:10,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1114684942, now seen corresponding path program 2 times [2019-11-23 20:35:10,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:10,905 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439268724] [2019-11-23 20:35:10,906 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:10,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:11,007 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 20:35:11,007 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439268724] [2019-11-23 20:35:11,007 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234169903] [2019-11-23 20:35:11,008 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:11,050 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:35:11,050 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:11,051 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:35:11,054 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:11,070 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 20:35:11,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:11,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 20:35:11,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002330742] [2019-11-23 20:35:11,072 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:35:11,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:11,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:35:11,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:35:11,073 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 7 states. [2019-11-23 20:35:11,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:11,098 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2019-11-23 20:35:11,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:35:11,098 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2019-11-23 20:35:11,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:11,099 INFO L225 Difference]: With dead ends: 35 [2019-11-23 20:35:11,099 INFO L226 Difference]: Without dead ends: 21 [2019-11-23 20:35:11,101 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:35:11,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-23 20:35:11,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-11-23 20:35:11,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-23 20:35:11,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2019-11-23 20:35:11,108 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 18 [2019-11-23 20:35:11,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:11,108 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2019-11-23 20:35:11,108 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:35:11,109 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2019-11-23 20:35:11,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:35:11,109 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:11,110 INFO L410 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:11,313 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:11,314 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:11,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:11,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1148926733, now seen corresponding path program 3 times [2019-11-23 20:35:11,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:11,315 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787714837] [2019-11-23 20:35:11,315 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:11,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:11,393 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 20:35:11,395 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787714837] [2019-11-23 20:35:11,396 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885496997] [2019-11-23 20:35:11,396 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:11,459 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:35:11,459 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:11,460 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-23 20:35:11,464 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:11,527 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-23 20:35:11,528 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:35:11,538 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:35:11,538 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:35:11,538 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2019-11-23 20:35:11,574 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2019-11-23 20:35:11,576 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:35:11,586 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:35:11,586 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:35:11,586 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2019-11-23 20:35:11,638 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:35:11,657 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 20:35:11,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:11,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2019-11-23 20:35:11,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769542993] [2019-11-23 20:35:11,660 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:35:11,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:11,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:35:11,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:35:11,661 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 11 states. [2019-11-23 20:35:11,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:11,939 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2019-11-23 20:35:11,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:35:11,940 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2019-11-23 20:35:11,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:11,941 INFO L225 Difference]: With dead ends: 44 [2019-11-23 20:35:11,941 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 20:35:11,942 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:35:11,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 20:35:11,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2019-11-23 20:35:11,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 20:35:11,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2019-11-23 20:35:11,947 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 19 [2019-11-23 20:35:11,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:11,947 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2019-11-23 20:35:11,947 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:35:11,948 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2019-11-23 20:35:11,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 20:35:11,948 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:11,949 INFO L410 BasicCegarLoop]: trace histogram [5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:12,151 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:12,154 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:12,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:12,154 INFO L82 PathProgramCache]: Analyzing trace with hash 270279746, now seen corresponding path program 1 times [2019-11-23 20:35:12,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:12,156 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155539453] [2019-11-23 20:35:12,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:12,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:12,260 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:35:12,261 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155539453] [2019-11-23 20:35:12,261 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315982598] [2019-11-23 20:35:12,261 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:12,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:12,321 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:35:12,323 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:12,336 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:35:12,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:12,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-23 20:35:12,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087104063] [2019-11-23 20:35:12,338 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:35:12,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:12,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:35:12,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:35:12,339 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 9 states. [2019-11-23 20:35:12,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:12,361 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2019-11-23 20:35:12,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:35:12,363 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2019-11-23 20:35:12,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:12,364 INFO L225 Difference]: With dead ends: 45 [2019-11-23 20:35:12,364 INFO L226 Difference]: Without dead ends: 27 [2019-11-23 20:35:12,364 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:35:12,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-23 20:35:12,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-11-23 20:35:12,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 20:35:12,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2019-11-23 20:35:12,371 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 25 [2019-11-23 20:35:12,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:12,373 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2019-11-23 20:35:12,373 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:35:12,373 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2019-11-23 20:35:12,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-23 20:35:12,374 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:12,374 INFO L410 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:12,575 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:12,576 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:12,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:12,577 INFO L82 PathProgramCache]: Analyzing trace with hash 738361789, now seen corresponding path program 2 times [2019-11-23 20:35:12,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:12,578 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532637000] [2019-11-23 20:35:12,578 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:12,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:12,672 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:35:12,673 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532637000] [2019-11-23 20:35:12,673 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225040465] [2019-11-23 20:35:12,673 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:12,724 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:35:12,724 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:12,725 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:35:12,728 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:12,742 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:35:12,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:12,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 20:35:12,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436840412] [2019-11-23 20:35:12,743 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:35:12,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:12,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:35:12,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:35:12,744 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 10 states. [2019-11-23 20:35:12,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:12,786 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2019-11-23 20:35:12,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:35:12,789 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2019-11-23 20:35:12,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:12,789 INFO L225 Difference]: With dead ends: 46 [2019-11-23 20:35:12,790 INFO L226 Difference]: Without dead ends: 28 [2019-11-23 20:35:12,791 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:35:12,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-23 20:35:12,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-11-23 20:35:12,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 20:35:12,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2019-11-23 20:35:12,798 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 26 [2019-11-23 20:35:12,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:12,798 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2019-11-23 20:35:12,798 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:35:12,798 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2019-11-23 20:35:12,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:35:12,800 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:12,800 INFO L410 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:13,004 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:13,006 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:13,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:13,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1930964062, now seen corresponding path program 3 times [2019-11-23 20:35:13,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:13,007 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284958512] [2019-11-23 20:35:13,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:13,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:13,113 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:35:13,113 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284958512] [2019-11-23 20:35:13,113 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032027953] [2019-11-23 20:35:13,113 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:13,159 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:35:13,159 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:13,160 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:35:13,163 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:13,273 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:35:13,288 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-23 20:35:13,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:13,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2019-11-23 20:35:13,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859872520] [2019-11-23 20:35:13,289 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:35:13,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:13,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:35:13,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:35:13,290 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 17 states. [2019-11-23 20:35:13,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:13,688 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2019-11-23 20:35:13,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:35:13,688 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 27 [2019-11-23 20:35:13,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:13,689 INFO L225 Difference]: With dead ends: 73 [2019-11-23 20:35:13,689 INFO L226 Difference]: Without dead ends: 46 [2019-11-23 20:35:13,690 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:35:13,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-23 20:35:13,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 32. [2019-11-23 20:35:13,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-23 20:35:13,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2019-11-23 20:35:13,695 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 27 [2019-11-23 20:35:13,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:13,695 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2019-11-23 20:35:13,696 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:35:13,696 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2019-11-23 20:35:13,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-23 20:35:13,697 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:13,697 INFO L410 BasicCegarLoop]: trace histogram [8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:13,900 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:13,901 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:13,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:13,901 INFO L82 PathProgramCache]: Analyzing trace with hash 632474463, now seen corresponding path program 1 times [2019-11-23 20:35:13,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:13,901 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687362688] [2019-11-23 20:35:13,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:13,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:14,014 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:35:14,015 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687362688] [2019-11-23 20:35:14,015 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771793955] [2019-11-23 20:35:14,015 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:14,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:14,066 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:35:14,068 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:14,086 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:35:14,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:14,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:35:14,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179086636] [2019-11-23 20:35:14,087 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:35:14,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:14,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:35:14,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:35:14,088 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 12 states. [2019-11-23 20:35:14,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:14,107 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2019-11-23 20:35:14,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:35:14,108 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2019-11-23 20:35:14,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:14,109 INFO L225 Difference]: With dead ends: 54 [2019-11-23 20:35:14,109 INFO L226 Difference]: Without dead ends: 33 [2019-11-23 20:35:14,109 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:35:14,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-23 20:35:14,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-11-23 20:35:14,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-23 20:35:14,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-11-23 20:35:14,114 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 28 [2019-11-23 20:35:14,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:14,115 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-11-23 20:35:14,115 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:35:14,115 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-11-23 20:35:14,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 20:35:14,115 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:14,116 INFO L410 BasicCegarLoop]: trace histogram [9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:14,319 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:14,319 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:14,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:14,320 INFO L82 PathProgramCache]: Analyzing trace with hash -494192636, now seen corresponding path program 2 times [2019-11-23 20:35:14,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:14,320 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472141231] [2019-11-23 20:35:14,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:14,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:14,434 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:35:14,435 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472141231] [2019-11-23 20:35:14,435 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152595012] [2019-11-23 20:35:14,435 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:14,484 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:35:14,484 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:14,485 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:35:14,487 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:14,508 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:35:14,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:14,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-23 20:35:14,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98136926] [2019-11-23 20:35:14,510 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:35:14,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:14,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:35:14,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:35:14,511 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 13 states. [2019-11-23 20:35:14,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:14,532 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2019-11-23 20:35:14,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:35:14,533 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2019-11-23 20:35:14,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:14,534 INFO L225 Difference]: With dead ends: 55 [2019-11-23 20:35:14,534 INFO L226 Difference]: Without dead ends: 34 [2019-11-23 20:35:14,534 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:35:14,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-23 20:35:14,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-11-23 20:35:14,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 20:35:14,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-11-23 20:35:14,539 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 29 [2019-11-23 20:35:14,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:14,539 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-11-23 20:35:14,539 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:35:14,539 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-11-23 20:35:14,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-23 20:35:14,540 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:14,540 INFO L410 BasicCegarLoop]: trace histogram [10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:14,744 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:14,745 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:14,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:14,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1061134337, now seen corresponding path program 3 times [2019-11-23 20:35:14,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:14,746 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933110681] [2019-11-23 20:35:14,746 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:14,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:14,864 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:35:14,865 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933110681] [2019-11-23 20:35:14,865 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561198594] [2019-11-23 20:35:14,865 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:14,898 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:35:14,898 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:14,899 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:35:14,900 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:14,916 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:35:14,925 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2019-11-23 20:35:14,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:14,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 16 [2019-11-23 20:35:14,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935569850] [2019-11-23 20:35:14,926 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:35:14,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:14,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:35:14,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:35:14,927 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 16 states. [2019-11-23 20:35:15,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:15,196 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2019-11-23 20:35:15,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:35:15,197 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2019-11-23 20:35:15,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:15,197 INFO L225 Difference]: With dead ends: 64 [2019-11-23 20:35:15,197 INFO L226 Difference]: Without dead ends: 43 [2019-11-23 20:35:15,198 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:35:15,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-23 20:35:15,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2019-11-23 20:35:15,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-23 20:35:15,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2019-11-23 20:35:15,203 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 30 [2019-11-23 20:35:15,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:15,203 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2019-11-23 20:35:15,203 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:35:15,203 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2019-11-23 20:35:15,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-23 20:35:15,204 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:15,204 INFO L410 BasicCegarLoop]: trace histogram [11, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:15,407 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:15,408 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:15,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:15,408 INFO L82 PathProgramCache]: Analyzing trace with hash 217051594, now seen corresponding path program 4 times [2019-11-23 20:35:15,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:15,409 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85835649] [2019-11-23 20:35:15,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:15,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:15,543 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-23 20:35:15,543 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85835649] [2019-11-23 20:35:15,544 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675136244] [2019-11-23 20:35:15,544 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:15,587 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:35:15,587 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:15,588 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:35:15,590 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:15,609 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-23 20:35:15,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:15,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-23 20:35:15,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843706322] [2019-11-23 20:35:15,610 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:35:15,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:15,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:35:15,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:35:15,611 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 15 states. [2019-11-23 20:35:15,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:15,646 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2019-11-23 20:35:15,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 20:35:15,646 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2019-11-23 20:35:15,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:15,647 INFO L225 Difference]: With dead ends: 57 [2019-11-23 20:35:15,647 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 20:35:15,648 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:35:15,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 20:35:15,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-11-23 20:35:15,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-23 20:35:15,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2019-11-23 20:35:15,658 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 34 [2019-11-23 20:35:15,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:15,659 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2019-11-23 20:35:15,660 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:35:15,660 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2019-11-23 20:35:15,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-23 20:35:15,662 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:15,663 INFO L410 BasicCegarLoop]: trace histogram [12, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:15,866 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:15,867 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:15,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:15,868 INFO L82 PathProgramCache]: Analyzing trace with hash 19631791, now seen corresponding path program 5 times [2019-11-23 20:35:15,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:15,868 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844717500] [2019-11-23 20:35:15,869 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:15,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:15,996 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-23 20:35:15,997 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844717500] [2019-11-23 20:35:15,997 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795884305] [2019-11-23 20:35:15,997 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:16,170 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-11-23 20:35:16,170 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:16,174 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:35:16,176 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:16,192 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-23 20:35:16,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:16,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-23 20:35:16,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158904149] [2019-11-23 20:35:16,193 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:35:16,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:16,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:35:16,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:35:16,194 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 16 states. [2019-11-23 20:35:16,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:16,233 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2019-11-23 20:35:16,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 20:35:16,233 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2019-11-23 20:35:16,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:16,234 INFO L225 Difference]: With dead ends: 58 [2019-11-23 20:35:16,234 INFO L226 Difference]: Without dead ends: 37 [2019-11-23 20:35:16,235 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:35:16,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-23 20:35:16,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-11-23 20:35:16,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-23 20:35:16,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2019-11-23 20:35:16,240 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 35 [2019-11-23 20:35:16,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:16,240 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2019-11-23 20:35:16,240 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:35:16,240 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2019-11-23 20:35:16,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-23 20:35:16,241 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:16,241 INFO L410 BasicCegarLoop]: trace histogram [13, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:16,445 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:16,445 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:16,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:16,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1805414806, now seen corresponding path program 6 times [2019-11-23 20:35:16,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:16,446 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705559737] [2019-11-23 20:35:16,446 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:16,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:16,585 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-23 20:35:16,586 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705559737] [2019-11-23 20:35:16,586 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676869926] [2019-11-23 20:35:16,586 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:16,651 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-23 20:35:16,651 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:16,652 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-23 20:35:16,654 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:16,660 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-23 20:35:16,660 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:35:16,668 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:35:16,668 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:35:16,668 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2019-11-23 20:35:16,737 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2019-11-23 20:35:16,738 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:35:16,748 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:35:16,749 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:35:16,749 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2019-11-23 20:35:16,926 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:35:16,979 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-11-23 20:35:16,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:16,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 24 [2019-11-23 20:35:16,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848754755] [2019-11-23 20:35:16,980 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:35:16,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:16,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:35:16,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:35:16,981 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 24 states. [2019-11-23 20:35:17,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:17,578 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2019-11-23 20:35:17,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 20:35:17,579 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 36 [2019-11-23 20:35:17,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:17,580 INFO L225 Difference]: With dead ends: 68 [2019-11-23 20:35:17,580 INFO L226 Difference]: Without dead ends: 47 [2019-11-23 20:35:17,581 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=398, Invalid=1162, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 20:35:17,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-23 20:35:17,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2019-11-23 20:35:17,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-23 20:35:17,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2019-11-23 20:35:17,586 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 36 [2019-11-23 20:35:17,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:17,587 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2019-11-23 20:35:17,587 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:35:17,587 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2019-11-23 20:35:17,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-23 20:35:17,588 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:17,588 INFO L410 BasicCegarLoop]: trace histogram [14, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:17,791 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:17,791 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:17,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:17,792 INFO L82 PathProgramCache]: Analyzing trace with hash -790418047, now seen corresponding path program 7 times [2019-11-23 20:35:17,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:17,793 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264810461] [2019-11-23 20:35:17,793 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:17,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:17,958 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-23 20:35:17,959 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264810461] [2019-11-23 20:35:17,959 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67434003] [2019-11-23 20:35:17,959 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:18,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:18,016 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:35:18,018 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:18,042 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-23 20:35:18,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:18,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 20:35:18,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425062814] [2019-11-23 20:35:18,043 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:35:18,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:18,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:35:18,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:35:18,045 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 18 states. [2019-11-23 20:35:18,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:18,078 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2019-11-23 20:35:18,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:35:18,078 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2019-11-23 20:35:18,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:18,079 INFO L225 Difference]: With dead ends: 70 [2019-11-23 20:35:18,079 INFO L226 Difference]: Without dead ends: 44 [2019-11-23 20:35:18,080 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:35:18,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-23 20:35:18,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-23 20:35:18,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-23 20:35:18,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2019-11-23 20:35:18,085 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 42 [2019-11-23 20:35:18,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:18,085 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2019-11-23 20:35:18,085 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:35:18,086 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2019-11-23 20:35:18,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-23 20:35:18,086 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:18,086 INFO L410 BasicCegarLoop]: trace histogram [15, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:18,290 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:18,290 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:18,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:18,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1359342234, now seen corresponding path program 8 times [2019-11-23 20:35:18,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:18,291 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504547495] [2019-11-23 20:35:18,291 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:18,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:18,474 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-23 20:35:18,475 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504547495] [2019-11-23 20:35:18,475 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509247490] [2019-11-23 20:35:18,475 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:18,527 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:35:18,527 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:18,528 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 20:35:18,530 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:18,550 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-23 20:35:18,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:18,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-23 20:35:18,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117022206] [2019-11-23 20:35:18,551 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:35:18,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:18,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:35:18,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:35:18,552 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 19 states. [2019-11-23 20:35:18,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:18,580 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2019-11-23 20:35:18,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 20:35:18,581 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 43 [2019-11-23 20:35:18,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:18,581 INFO L225 Difference]: With dead ends: 71 [2019-11-23 20:35:18,581 INFO L226 Difference]: Without dead ends: 45 [2019-11-23 20:35:18,582 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:35:18,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-23 20:35:18,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2019-11-23 20:35:18,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-23 20:35:18,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2019-11-23 20:35:18,587 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 43 [2019-11-23 20:35:18,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:18,587 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2019-11-23 20:35:18,587 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:35:18,587 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2019-11-23 20:35:18,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-23 20:35:18,588 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:18,588 INFO L410 BasicCegarLoop]: trace histogram [16, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:18,797 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:18,797 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:18,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:18,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1816122847, now seen corresponding path program 9 times [2019-11-23 20:35:18,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:18,798 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752772723] [2019-11-23 20:35:18,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:18,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:18,980 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-23 20:35:18,980 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752772723] [2019-11-23 20:35:18,981 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372185684] [2019-11-23 20:35:18,981 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:19,028 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:35:19,028 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:19,029 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:35:19,031 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:19,188 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:35:19,208 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-11-23 20:35:19,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:19,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 28 [2019-11-23 20:35:19,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485286164] [2019-11-23 20:35:19,209 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 20:35:19,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:19,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 20:35:19,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:35:19,210 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 28 states. [2019-11-23 20:35:19,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:19,946 INFO L93 Difference]: Finished difference Result 108 states and 117 transitions. [2019-11-23 20:35:19,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 20:35:19,947 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 44 [2019-11-23 20:35:19,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:19,948 INFO L225 Difference]: With dead ends: 108 [2019-11-23 20:35:19,948 INFO L226 Difference]: Without dead ends: 68 [2019-11-23 20:35:19,949 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=545, Invalid=1617, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 20:35:19,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-23 20:35:19,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2019-11-23 20:35:19,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-23 20:35:19,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2019-11-23 20:35:19,954 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 44 [2019-11-23 20:35:19,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:19,954 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2019-11-23 20:35:19,954 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 20:35:19,955 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2019-11-23 20:35:19,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-23 20:35:19,955 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:19,955 INFO L410 BasicCegarLoop]: trace histogram [17, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:20,158 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:20,159 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:20,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:20,159 INFO L82 PathProgramCache]: Analyzing trace with hash -790597372, now seen corresponding path program 4 times [2019-11-23 20:35:20,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:20,160 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780945200] [2019-11-23 20:35:20,160 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:20,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:20,346 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-23 20:35:20,346 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780945200] [2019-11-23 20:35:20,346 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821628979] [2019-11-23 20:35:20,347 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:20,392 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:35:20,392 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:20,393 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:35:20,395 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:20,429 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:35:20,443 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2019-11-23 20:35:20,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:20,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 6] total 24 [2019-11-23 20:35:20,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440946883] [2019-11-23 20:35:20,444 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:35:20,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:20,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:35:20,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=351, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:35:20,445 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 24 states. [2019-11-23 20:35:20,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:20,906 INFO L93 Difference]: Finished difference Result 87 states and 95 transitions. [2019-11-23 20:35:20,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 20:35:20,907 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 45 [2019-11-23 20:35:20,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:20,907 INFO L225 Difference]: With dead ends: 87 [2019-11-23 20:35:20,908 INFO L226 Difference]: Without dead ends: 58 [2019-11-23 20:35:20,909 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=633, Invalid=1347, Unknown=0, NotChecked=0, Total=1980 [2019-11-23 20:35:20,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-23 20:35:20,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 50. [2019-11-23 20:35:20,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 20:35:20,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2019-11-23 20:35:20,913 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 45 [2019-11-23 20:35:20,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:20,914 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2019-11-23 20:35:20,914 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:35:20,914 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2019-11-23 20:35:20,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 20:35:20,914 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:20,914 INFO L410 BasicCegarLoop]: trace histogram [18, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:21,118 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:21,118 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:21,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:21,119 INFO L82 PathProgramCache]: Analyzing trace with hash 475751443, now seen corresponding path program 10 times [2019-11-23 20:35:21,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:21,120 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386944505] [2019-11-23 20:35:21,120 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:21,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:21,391 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-23 20:35:21,392 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386944505] [2019-11-23 20:35:21,392 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315403800] [2019-11-23 20:35:21,392 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:21,475 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:35:21,475 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:21,477 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-23 20:35:21,478 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:21,499 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-23 20:35:21,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:21,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-11-23 20:35:21,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695329973] [2019-11-23 20:35:21,500 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 20:35:21,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:21,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 20:35:21,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:35:21,501 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 22 states. [2019-11-23 20:35:21,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:21,538 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2019-11-23 20:35:21,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 20:35:21,539 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 49 [2019-11-23 20:35:21,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:21,540 INFO L225 Difference]: With dead ends: 80 [2019-11-23 20:35:21,540 INFO L226 Difference]: Without dead ends: 51 [2019-11-23 20:35:21,540 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:35:21,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-23 20:35:21,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-11-23 20:35:21,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-23 20:35:21,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2019-11-23 20:35:21,546 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 49 [2019-11-23 20:35:21,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:21,546 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2019-11-23 20:35:21,546 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 20:35:21,546 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2019-11-23 20:35:21,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-23 20:35:21,547 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:21,547 INFO L410 BasicCegarLoop]: trace histogram [19, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:21,750 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:21,750 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:21,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:21,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1970258062, now seen corresponding path program 11 times [2019-11-23 20:35:21,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:21,751 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8904495] [2019-11-23 20:35:21,751 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:21,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:21,982 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-23 20:35:21,983 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8904495] [2019-11-23 20:35:21,983 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801760072] [2019-11-23 20:35:21,983 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:22,424 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-11-23 20:35:22,424 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:22,426 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 20:35:22,427 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:22,446 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-23 20:35:22,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:22,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-23 20:35:22,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636788444] [2019-11-23 20:35:22,447 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 20:35:22,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:22,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 20:35:22,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:35:22,448 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 23 states. [2019-11-23 20:35:22,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:22,500 INFO L93 Difference]: Finished difference Result 81 states and 87 transitions. [2019-11-23 20:35:22,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:35:22,502 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 50 [2019-11-23 20:35:22,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:22,503 INFO L225 Difference]: With dead ends: 81 [2019-11-23 20:35:22,503 INFO L226 Difference]: Without dead ends: 52 [2019-11-23 20:35:22,503 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:35:22,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-23 20:35:22,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-11-23 20:35:22,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-23 20:35:22,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2019-11-23 20:35:22,508 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 50 [2019-11-23 20:35:22,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:22,509 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2019-11-23 20:35:22,509 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 20:35:22,509 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2019-11-23 20:35:22,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-23 20:35:22,509 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:22,510 INFO L410 BasicCegarLoop]: trace histogram [20, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:22,714 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:22,715 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:22,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:22,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1055322995, now seen corresponding path program 12 times [2019-11-23 20:35:22,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:22,717 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907111983] [2019-11-23 20:35:22,717 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:22,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:22,964 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-23 20:35:22,965 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907111983] [2019-11-23 20:35:22,965 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961460106] [2019-11-23 20:35:22,965 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:23,153 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 20:35:23,154 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:23,156 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-23 20:35:23,158 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:23,180 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-23 20:35:23,180 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:35:23,187 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:35:23,188 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:35:23,188 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-23 20:35:23,272 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2019-11-23 20:35:23,273 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:35:23,281 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:35:23,281 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:35:23,281 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2019-11-23 20:35:23,394 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:35:23,419 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-23 20:35:23,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:23,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 10] total 31 [2019-11-23 20:35:23,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566635826] [2019-11-23 20:35:23,420 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-23 20:35:23,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:23,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-23 20:35:23,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=655, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:35:23,421 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 31 states. [2019-11-23 20:35:24,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:24,439 INFO L93 Difference]: Finished difference Result 91 states and 98 transitions. [2019-11-23 20:35:24,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-23 20:35:24,440 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 51 [2019-11-23 20:35:24,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:24,441 INFO L225 Difference]: With dead ends: 91 [2019-11-23 20:35:24,441 INFO L226 Difference]: Without dead ends: 62 [2019-11-23 20:35:24,442 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=790, Invalid=2072, Unknown=0, NotChecked=0, Total=2862 [2019-11-23 20:35:24,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-23 20:35:24,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2019-11-23 20:35:24,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 20:35:24,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2019-11-23 20:35:24,447 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 51 [2019-11-23 20:35:24,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:24,447 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2019-11-23 20:35:24,448 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-23 20:35:24,448 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2019-11-23 20:35:24,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 20:35:24,448 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:24,449 INFO L410 BasicCegarLoop]: trace histogram [21, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:24,653 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:24,653 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:24,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:24,653 INFO L82 PathProgramCache]: Analyzing trace with hash 2141532610, now seen corresponding path program 13 times [2019-11-23 20:35:24,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:24,654 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126002171] [2019-11-23 20:35:24,654 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:24,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:24,949 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-11-23 20:35:24,949 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126002171] [2019-11-23 20:35:24,949 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126272081] [2019-11-23 20:35:24,949 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:25,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:25,014 INFO L255 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-23 20:35:25,017 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:25,065 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-11-23 20:35:25,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:25,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-11-23 20:35:25,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139713981] [2019-11-23 20:35:25,069 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 20:35:25,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:25,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 20:35:25,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:35:25,070 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 25 states. [2019-11-23 20:35:25,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:25,108 INFO L93 Difference]: Finished difference Result 93 states and 99 transitions. [2019-11-23 20:35:25,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 20:35:25,108 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 57 [2019-11-23 20:35:25,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:25,109 INFO L225 Difference]: With dead ends: 93 [2019-11-23 20:35:25,109 INFO L226 Difference]: Without dead ends: 59 [2019-11-23 20:35:25,109 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:35:25,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-23 20:35:25,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-11-23 20:35:25,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-23 20:35:25,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2019-11-23 20:35:25,113 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 57 [2019-11-23 20:35:25,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:25,113 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2019-11-23 20:35:25,113 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 20:35:25,113 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2019-11-23 20:35:25,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-23 20:35:25,114 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:25,114 INFO L410 BasicCegarLoop]: trace histogram [22, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:25,317 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:25,317 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:25,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:25,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1501487933, now seen corresponding path program 14 times [2019-11-23 20:35:25,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:25,318 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502198371] [2019-11-23 20:35:25,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:25,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:25,578 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-11-23 20:35:25,578 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502198371] [2019-11-23 20:35:25,579 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538388916] [2019-11-23 20:35:25,579 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:25,651 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:35:25,651 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:25,653 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 20:35:25,654 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:25,670 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-11-23 20:35:25,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:25,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-11-23 20:35:25,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434892108] [2019-11-23 20:35:25,671 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 20:35:25,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:25,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 20:35:25,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:35:25,672 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 26 states. [2019-11-23 20:35:25,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:25,709 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2019-11-23 20:35:25,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:35:25,710 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 58 [2019-11-23 20:35:25,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:25,710 INFO L225 Difference]: With dead ends: 94 [2019-11-23 20:35:25,710 INFO L226 Difference]: Without dead ends: 60 [2019-11-23 20:35:25,711 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:35:25,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-23 20:35:25,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-11-23 20:35:25,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-23 20:35:25,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2019-11-23 20:35:25,714 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 58 [2019-11-23 20:35:25,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:25,715 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2019-11-23 20:35:25,715 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 20:35:25,715 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2019-11-23 20:35:25,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-23 20:35:25,715 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:25,716 INFO L410 BasicCegarLoop]: trace histogram [23, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:25,918 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:25,919 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:25,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:25,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1160027870, now seen corresponding path program 15 times [2019-11-23 20:35:25,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:25,920 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991605344] [2019-11-23 20:35:25,920 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:25,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:26,374 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-11-23 20:35:26,374 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991605344] [2019-11-23 20:35:26,374 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475833658] [2019-11-23 20:35:26,375 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:26,441 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 20:35:26,442 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:26,443 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-23 20:35:26,444 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:26,678 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:35:26,705 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2019-11-23 20:35:26,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:26,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 13] total 37 [2019-11-23 20:35:26,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429355447] [2019-11-23 20:35:26,706 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-23 20:35:26,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:26,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-23 20:35:26,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 20:35:26,707 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand 37 states. [2019-11-23 20:35:27,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:27,997 INFO L93 Difference]: Finished difference Result 141 states and 150 transitions. [2019-11-23 20:35:27,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-23 20:35:27,998 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 59 [2019-11-23 20:35:27,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:27,999 INFO L225 Difference]: With dead ends: 141 [2019-11-23 20:35:27,999 INFO L226 Difference]: Without dead ends: 88 [2019-11-23 20:35:28,001 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1013, Invalid=2893, Unknown=0, NotChecked=0, Total=3906 [2019-11-23 20:35:28,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-11-23 20:35:28,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 64. [2019-11-23 20:35:28,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-23 20:35:28,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2019-11-23 20:35:28,005 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 59 [2019-11-23 20:35:28,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:28,005 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2019-11-23 20:35:28,005 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-23 20:35:28,005 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2019-11-23 20:35:28,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-11-23 20:35:28,006 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:28,006 INFO L410 BasicCegarLoop]: trace histogram [24, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:28,209 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:28,209 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:28,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:28,209 INFO L82 PathProgramCache]: Analyzing trace with hash 426889823, now seen corresponding path program 5 times [2019-11-23 20:35:28,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:28,210 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626919834] [2019-11-23 20:35:28,210 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:28,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:28,488 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-11-23 20:35:28,488 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626919834] [2019-11-23 20:35:28,489 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049869163] [2019-11-23 20:35:28,489 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:29,422 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-11-23 20:35:29,423 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:29,425 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:35:29,426 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:29,477 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:35:29,494 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2019-11-23 20:35:29,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:29,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 7] total 32 [2019-11-23 20:35:29,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334713638] [2019-11-23 20:35:29,495 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 20:35:29,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:29,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 20:35:29,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=625, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:35:29,496 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 32 states. [2019-11-23 20:35:30,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:30,194 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2019-11-23 20:35:30,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:35:30,195 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 60 [2019-11-23 20:35:30,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:30,196 INFO L225 Difference]: With dead ends: 110 [2019-11-23 20:35:30,196 INFO L226 Difference]: Without dead ends: 73 [2019-11-23 20:35:30,198 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1170, Invalid=2490, Unknown=0, NotChecked=0, Total=3660 [2019-11-23 20:35:30,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-23 20:35:30,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 65. [2019-11-23 20:35:30,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-23 20:35:30,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2019-11-23 20:35:30,202 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 60 [2019-11-23 20:35:30,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:30,202 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2019-11-23 20:35:30,202 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 20:35:30,202 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2019-11-23 20:35:30,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-23 20:35:30,203 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:30,203 INFO L410 BasicCegarLoop]: trace histogram [25, 5, 5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:30,403 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:30,404 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:30,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:30,404 INFO L82 PathProgramCache]: Analyzing trace with hash 186635434, now seen corresponding path program 16 times [2019-11-23 20:35:30,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:30,405 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257811785] [2019-11-23 20:35:30,405 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:30,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:30,737 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:35:30,737 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257811785] [2019-11-23 20:35:30,738 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408389382] [2019-11-23 20:35:30,738 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:30,808 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:35:30,808 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:30,809 INFO L255 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-23 20:35:30,811 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:30,824 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:35:30,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:30,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-11-23 20:35:30,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715827104] [2019-11-23 20:35:30,825 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 20:35:30,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:30,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 20:35:30,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:35:30,826 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand 29 states. [2019-11-23 20:35:30,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:30,878 INFO L93 Difference]: Finished difference Result 103 states and 109 transitions. [2019-11-23 20:35:30,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 20:35:30,881 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 64 [2019-11-23 20:35:30,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:30,882 INFO L225 Difference]: With dead ends: 103 [2019-11-23 20:35:30,882 INFO L226 Difference]: Without dead ends: 66 [2019-11-23 20:35:30,882 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:35:30,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-11-23 20:35:30,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2019-11-23 20:35:30,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-23 20:35:30,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2019-11-23 20:35:30,886 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 64 [2019-11-23 20:35:30,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:30,887 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2019-11-23 20:35:30,887 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 20:35:30,887 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2019-11-23 20:35:30,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 20:35:30,887 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:30,887 INFO L410 BasicCegarLoop]: trace histogram [26, 5, 5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:31,090 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:31,092 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:31,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:31,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1268935985, now seen corresponding path program 17 times [2019-11-23 20:35:31,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:31,093 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019226070] [2019-11-23 20:35:31,093 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:31,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:31,605 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:35:31,605 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019226070] [2019-11-23 20:35:31,605 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512354591] [2019-11-23 20:35:31,605 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:33,557 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2019-11-23 20:35:33,557 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:33,562 INFO L255 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-23 20:35:33,563 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:33,577 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:35:33,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:33,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-11-23 20:35:33,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639743493] [2019-11-23 20:35:33,578 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 20:35:33,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:33,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 20:35:33,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:35:33,579 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand 30 states. [2019-11-23 20:35:33,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:33,645 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2019-11-23 20:35:33,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 20:35:33,645 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 65 [2019-11-23 20:35:33,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:33,646 INFO L225 Difference]: With dead ends: 104 [2019-11-23 20:35:33,646 INFO L226 Difference]: Without dead ends: 67 [2019-11-23 20:35:33,647 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:35:33,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-23 20:35:33,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2019-11-23 20:35:33,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-11-23 20:35:33,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2019-11-23 20:35:33,651 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 65 [2019-11-23 20:35:33,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:33,652 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2019-11-23 20:35:33,652 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 20:35:33,652 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2019-11-23 20:35:33,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-11-23 20:35:33,652 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:33,652 INFO L410 BasicCegarLoop]: trace histogram [27, 5, 5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:33,854 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:33,854 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:33,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:33,855 INFO L82 PathProgramCache]: Analyzing trace with hash 852990282, now seen corresponding path program 18 times [2019-11-23 20:35:33,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:33,855 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918943723] [2019-11-23 20:35:33,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:33,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:34,211 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:35:34,212 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918943723] [2019-11-23 20:35:34,212 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648249038] [2019-11-23 20:35:34,212 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:34,814 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-23 20:35:34,814 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:34,817 INFO L255 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-23 20:35:34,818 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:34,824 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-23 20:35:34,824 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:35:34,830 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:35:34,830 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:35:34,830 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2019-11-23 20:35:34,943 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2019-11-23 20:35:34,944 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:35:34,951 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:35:34,952 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:35:34,952 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2019-11-23 20:35:35,172 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:35:35,207 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2019-11-23 20:35:35,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:35,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 13] total 41 [2019-11-23 20:35:35,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593088239] [2019-11-23 20:35:35,208 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-23 20:35:35,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:35,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-23 20:35:35,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=468, Invalid=1172, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 20:35:35,209 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 41 states. [2019-11-23 20:35:36,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:36,969 INFO L93 Difference]: Finished difference Result 114 states and 121 transitions. [2019-11-23 20:35:36,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-23 20:35:36,969 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 66 [2019-11-23 20:35:36,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:36,970 INFO L225 Difference]: With dead ends: 114 [2019-11-23 20:35:36,970 INFO L226 Difference]: Without dead ends: 77 [2019-11-23 20:35:36,973 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1355, Invalid=3757, Unknown=0, NotChecked=0, Total=5112 [2019-11-23 20:35:36,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-23 20:35:36,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 73. [2019-11-23 20:35:36,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-23 20:35:36,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2019-11-23 20:35:36,980 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 66 [2019-11-23 20:35:36,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:36,980 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2019-11-23 20:35:36,980 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-11-23 20:35:36,980 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2019-11-23 20:35:36,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-11-23 20:35:36,981 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:36,981 INFO L410 BasicCegarLoop]: trace histogram [28, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:37,187 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:37,187 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:37,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:37,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1384848031, now seen corresponding path program 19 times [2019-11-23 20:35:37,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:37,188 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153898243] [2019-11-23 20:35:37,188 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:37,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:37,572 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2019-11-23 20:35:37,573 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153898243] [2019-11-23 20:35:37,573 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654850942] [2019-11-23 20:35:37,573 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:37,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:37,644 INFO L255 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 20:35:37,647 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:37,681 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2019-11-23 20:35:37,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:37,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-11-23 20:35:37,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969329874] [2019-11-23 20:35:37,682 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 20:35:37,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:37,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 20:35:37,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:35:37,685 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand 32 states. [2019-11-23 20:35:37,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:37,730 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2019-11-23 20:35:37,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 20:35:37,731 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 72 [2019-11-23 20:35:37,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:37,732 INFO L225 Difference]: With dead ends: 116 [2019-11-23 20:35:37,732 INFO L226 Difference]: Without dead ends: 74 [2019-11-23 20:35:37,733 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:35:37,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-23 20:35:37,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2019-11-23 20:35:37,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-23 20:35:37,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2019-11-23 20:35:37,739 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 72 [2019-11-23 20:35:37,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:37,740 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2019-11-23 20:35:37,740 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 20:35:37,740 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2019-11-23 20:35:37,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-11-23 20:35:37,741 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:37,741 INFO L410 BasicCegarLoop]: trace histogram [29, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:37,941 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:37,942 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:37,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:37,942 INFO L82 PathProgramCache]: Analyzing trace with hash 33074822, now seen corresponding path program 20 times [2019-11-23 20:35:37,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:37,943 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578225698] [2019-11-23 20:35:37,943 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:37,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:38,363 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2019-11-23 20:35:38,363 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578225698] [2019-11-23 20:35:38,363 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085633481] [2019-11-23 20:35:38,363 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:38,439 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:35:38,439 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:38,440 INFO L255 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-23 20:35:38,442 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:38,453 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2019-11-23 20:35:38,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:38,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2019-11-23 20:35:38,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244635678] [2019-11-23 20:35:38,454 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-23 20:35:38,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:38,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-23 20:35:38,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 20:35:38,454 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand 33 states. [2019-11-23 20:35:38,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:38,504 INFO L93 Difference]: Finished difference Result 117 states and 123 transitions. [2019-11-23 20:35:38,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-23 20:35:38,504 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 73 [2019-11-23 20:35:38,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:38,505 INFO L225 Difference]: With dead ends: 117 [2019-11-23 20:35:38,505 INFO L226 Difference]: Without dead ends: 75 [2019-11-23 20:35:38,505 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 20:35:38,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-11-23 20:35:38,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2019-11-23 20:35:38,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-11-23 20:35:38,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2019-11-23 20:35:38,509 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 73 [2019-11-23 20:35:38,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:38,510 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2019-11-23 20:35:38,510 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-23 20:35:38,510 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2019-11-23 20:35:38,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-11-23 20:35:38,510 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:38,511 INFO L410 BasicCegarLoop]: trace histogram [30, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:38,714 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:38,714 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:38,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:38,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1039010305, now seen corresponding path program 21 times [2019-11-23 20:35:38,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:38,716 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210715658] [2019-11-23 20:35:38,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:38,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:39,148 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2019-11-23 20:35:39,148 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210715658] [2019-11-23 20:35:39,148 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044887843] [2019-11-23 20:35:39,149 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:39,232 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-23 20:35:39,233 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:39,234 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 20:35:39,236 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:39,535 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:35:39,572 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 4 proven. 72 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2019-11-23 20:35:39,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:39,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 15] total 46 [2019-11-23 20:35:39,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126846819] [2019-11-23 20:35:39,573 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-11-23 20:35:39,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:39,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-11-23 20:35:39,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=564, Invalid=1506, Unknown=0, NotChecked=0, Total=2070 [2019-11-23 20:35:39,574 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand 46 states. [2019-11-23 20:35:41,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:41,339 INFO L93 Difference]: Finished difference Result 174 states and 183 transitions. [2019-11-23 20:35:41,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-11-23 20:35:41,340 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 74 [2019-11-23 20:35:41,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:41,341 INFO L225 Difference]: With dead ends: 174 [2019-11-23 20:35:41,341 INFO L226 Difference]: Without dead ends: 108 [2019-11-23 20:35:41,344 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1097 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1628, Invalid=4534, Unknown=0, NotChecked=0, Total=6162 [2019-11-23 20:35:41,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-11-23 20:35:41,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 79. [2019-11-23 20:35:41,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-23 20:35:41,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2019-11-23 20:35:41,348 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 74 [2019-11-23 20:35:41,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:41,349 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2019-11-23 20:35:41,349 INFO L463 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-11-23 20:35:41,349 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2019-11-23 20:35:41,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-23 20:35:41,349 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:41,349 INFO L410 BasicCegarLoop]: trace histogram [31, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:41,552 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:41,553 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:41,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:41,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1648766116, now seen corresponding path program 6 times [2019-11-23 20:35:41,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:41,554 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853979241] [2019-11-23 20:35:41,555 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:41,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:42,055 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2019-11-23 20:35:42,056 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853979241] [2019-11-23 20:35:42,056 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663645222] [2019-11-23 20:35:42,056 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:42,605 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-23 20:35:42,606 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:42,608 INFO L255 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:35:42,610 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:42,693 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:35:42,714 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 542 trivial. 0 not checked. [2019-11-23 20:35:42,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:42,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 8] total 40 [2019-11-23 20:35:42,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793502165] [2019-11-23 20:35:42,715 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-23 20:35:42,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:42,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-23 20:35:42,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=583, Invalid=977, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 20:35:42,716 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 40 states. [2019-11-23 20:35:43,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:43,695 INFO L93 Difference]: Finished difference Result 133 states and 141 transitions. [2019-11-23 20:35:43,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-11-23 20:35:43,695 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 75 [2019-11-23 20:35:43,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:43,696 INFO L225 Difference]: With dead ends: 133 [2019-11-23 20:35:43,696 INFO L226 Difference]: Without dead ends: 88 [2019-11-23 20:35:43,699 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1871, Invalid=3981, Unknown=0, NotChecked=0, Total=5852 [2019-11-23 20:35:43,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-11-23 20:35:43,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 80. [2019-11-23 20:35:43,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-23 20:35:43,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2019-11-23 20:35:43,703 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 75 [2019-11-23 20:35:43,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:43,703 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2019-11-23 20:35:43,703 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-23 20:35:43,703 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2019-11-23 20:35:43,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-23 20:35:43,703 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:43,704 INFO L410 BasicCegarLoop]: trace histogram [32, 6, 6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:43,905 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:43,906 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:43,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:43,907 INFO L82 PathProgramCache]: Analyzing trace with hash -58602701, now seen corresponding path program 22 times [2019-11-23 20:35:43,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:43,907 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099361971] [2019-11-23 20:35:43,907 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:43,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:44,402 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-23 20:35:44,402 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099361971] [2019-11-23 20:35:44,402 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673237932] [2019-11-23 20:35:44,402 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:44,493 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:35:44,494 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:44,495 INFO L255 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-23 20:35:44,496 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:44,511 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-23 20:35:44,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:44,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-11-23 20:35:44,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618047320] [2019-11-23 20:35:44,512 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 20:35:44,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:44,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 20:35:44,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:35:44,513 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand 36 states. [2019-11-23 20:35:44,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:44,570 INFO L93 Difference]: Finished difference Result 126 states and 132 transitions. [2019-11-23 20:35:44,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:35:44,570 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 79 [2019-11-23 20:35:44,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:44,571 INFO L225 Difference]: With dead ends: 126 [2019-11-23 20:35:44,571 INFO L226 Difference]: Without dead ends: 81 [2019-11-23 20:35:44,571 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:35:44,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-11-23 20:35:44,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2019-11-23 20:35:44,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-23 20:35:44,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2019-11-23 20:35:44,574 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 79 [2019-11-23 20:35:44,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:44,575 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2019-11-23 20:35:44,575 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 20:35:44,575 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2019-11-23 20:35:44,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-11-23 20:35:44,575 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:44,576 INFO L410 BasicCegarLoop]: trace histogram [33, 6, 6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:44,776 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:44,776 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:44,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:44,777 INFO L82 PathProgramCache]: Analyzing trace with hash -295346578, now seen corresponding path program 23 times [2019-11-23 20:35:44,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:44,778 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884964735] [2019-11-23 20:35:44,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:44,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:45,384 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-23 20:35:45,384 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884964735] [2019-11-23 20:35:45,385 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341535685] [2019-11-23 20:35:45,385 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:06,944 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-23 20:36:06,944 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:36:06,961 INFO L255 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-23 20:36:06,962 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:06,977 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-23 20:36:06,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:06,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2019-11-23 20:36:06,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898481796] [2019-11-23 20:36:06,978 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-23 20:36:06,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:06,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-23 20:36:06,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 20:36:06,979 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand 37 states. [2019-11-23 20:36:07,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:07,051 INFO L93 Difference]: Finished difference Result 127 states and 133 transitions. [2019-11-23 20:36:07,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-23 20:36:07,052 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 80 [2019-11-23 20:36:07,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:07,052 INFO L225 Difference]: With dead ends: 127 [2019-11-23 20:36:07,053 INFO L226 Difference]: Without dead ends: 82 [2019-11-23 20:36:07,053 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 20:36:07,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-11-23 20:36:07,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2019-11-23 20:36:07,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-11-23 20:36:07,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2019-11-23 20:36:07,057 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 80 [2019-11-23 20:36:07,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:07,058 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2019-11-23 20:36:07,058 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-23 20:36:07,058 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2019-11-23 20:36:07,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-23 20:36:07,058 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:07,059 INFO L410 BasicCegarLoop]: trace histogram [34, 6, 6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:07,261 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:07,261 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:07,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:07,262 INFO L82 PathProgramCache]: Analyzing trace with hash 955527827, now seen corresponding path program 24 times [2019-11-23 20:36:07,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:07,262 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308097846] [2019-11-23 20:36:07,262 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:07,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:07,994 INFO L134 CoverageAnalysis]: Checked inductivity of 686 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-23 20:36:07,994 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308097846] [2019-11-23 20:36:07,994 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703835059] [2019-11-23 20:36:07,994 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:09,862 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-11-23 20:36:09,862 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:36:09,866 INFO L255 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 50 conjunts are in the unsatisfiable core [2019-11-23 20:36:09,867 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:09,870 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-23 20:36:09,870 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:36:09,875 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:36:09,875 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:36:09,875 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-23 20:36:10,040 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2019-11-23 20:36:10,041 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:36:10,046 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:36:10,046 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:36:10,047 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2019-11-23 20:36:10,316 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:36:10,372 INFO L134 CoverageAnalysis]: Checked inductivity of 686 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2019-11-23 20:36:10,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:10,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 15] total 50 [2019-11-23 20:36:10,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281186897] [2019-11-23 20:36:10,373 INFO L442 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-11-23 20:36:10,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:10,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-11-23 20:36:10,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=1745, Unknown=0, NotChecked=0, Total=2450 [2019-11-23 20:36:10,374 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand 50 states. [2019-11-23 20:36:12,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:12,557 INFO L93 Difference]: Finished difference Result 137 states and 144 transitions. [2019-11-23 20:36:12,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-11-23 20:36:12,557 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 81 [2019-11-23 20:36:12,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:12,558 INFO L225 Difference]: With dead ends: 137 [2019-11-23 20:36:12,559 INFO L226 Difference]: Without dead ends: 92 [2019-11-23 20:36:12,560 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1390 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2054, Invalid=5602, Unknown=0, NotChecked=0, Total=7656 [2019-11-23 20:36:12,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-23 20:36:12,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2019-11-23 20:36:12,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-11-23 20:36:12,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2019-11-23 20:36:12,564 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 81 [2019-11-23 20:36:12,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:12,565 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2019-11-23 20:36:12,565 INFO L463 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-11-23 20:36:12,565 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2019-11-23 20:36:12,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-23 20:36:12,565 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:12,565 INFO L410 BasicCegarLoop]: trace histogram [35, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:12,769 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:12,769 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:12,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:12,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1773398046, now seen corresponding path program 25 times [2019-11-23 20:36:12,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:12,770 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496045615] [2019-11-23 20:36:12,770 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:12,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:13,300 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2019-11-23 20:36:13,301 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496045615] [2019-11-23 20:36:13,301 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86389312] [2019-11-23 20:36:13,301 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:13,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:13,384 INFO L255 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-23 20:36:13,386 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:13,410 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2019-11-23 20:36:13,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:13,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2019-11-23 20:36:13,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739663465] [2019-11-23 20:36:13,411 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-23 20:36:13,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:13,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-23 20:36:13,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:36:13,412 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand 39 states. [2019-11-23 20:36:13,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:13,451 INFO L93 Difference]: Finished difference Result 139 states and 145 transitions. [2019-11-23 20:36:13,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-23 20:36:13,451 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 87 [2019-11-23 20:36:13,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:13,452 INFO L225 Difference]: With dead ends: 139 [2019-11-23 20:36:13,452 INFO L226 Difference]: Without dead ends: 89 [2019-11-23 20:36:13,453 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:36:13,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-23 20:36:13,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2019-11-23 20:36:13,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-23 20:36:13,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2019-11-23 20:36:13,458 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 87 [2019-11-23 20:36:13,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:13,458 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2019-11-23 20:36:13,458 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-23 20:36:13,458 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2019-11-23 20:36:13,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-11-23 20:36:13,459 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:13,459 INFO L410 BasicCegarLoop]: trace histogram [36, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:13,663 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:13,663 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:13,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:13,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1823621149, now seen corresponding path program 26 times [2019-11-23 20:36:13,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:13,664 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741281466] [2019-11-23 20:36:13,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:13,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:14,517 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2019-11-23 20:36:14,517 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741281466] [2019-11-23 20:36:14,517 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413305408] [2019-11-23 20:36:14,517 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:14,594 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:36:14,594 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:36:14,596 INFO L255 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 38 conjunts are in the unsatisfiable core [2019-11-23 20:36:14,597 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:14,613 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2019-11-23 20:36:14,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:14,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2019-11-23 20:36:14,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260024959] [2019-11-23 20:36:14,614 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-23 20:36:14,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:14,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-23 20:36:14,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 20:36:14,615 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand 40 states. [2019-11-23 20:36:14,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:14,669 INFO L93 Difference]: Finished difference Result 140 states and 146 transitions. [2019-11-23 20:36:14,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-23 20:36:14,669 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 88 [2019-11-23 20:36:14,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:14,670 INFO L225 Difference]: With dead ends: 140 [2019-11-23 20:36:14,670 INFO L226 Difference]: Without dead ends: 90 [2019-11-23 20:36:14,670 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 20:36:14,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-11-23 20:36:14,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2019-11-23 20:36:14,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-11-23 20:36:14,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2019-11-23 20:36:14,675 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 88 [2019-11-23 20:36:14,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:14,676 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2019-11-23 20:36:14,676 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-23 20:36:14,676 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2019-11-23 20:36:14,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-11-23 20:36:14,676 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:14,676 INFO L410 BasicCegarLoop]: trace histogram [37, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:14,880 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:14,880 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:14,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:14,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1662066498, now seen corresponding path program 27 times [2019-11-23 20:36:14,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:14,881 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592966693] [2019-11-23 20:36:14,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:14,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:15,825 INFO L134 CoverageAnalysis]: Checked inductivity of 818 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2019-11-23 20:36:15,825 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592966693] [2019-11-23 20:36:15,826 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37225337] [2019-11-23 20:36:15,826 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:16,177 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:36:16,177 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:36:16,180 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 46 conjunts are in the unsatisfiable core [2019-11-23 20:36:16,182 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:16,763 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:36:16,817 INFO L134 CoverageAnalysis]: Checked inductivity of 818 backedges. 5 proven. 183 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2019-11-23 20:36:16,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:16,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 21] total 59 [2019-11-23 20:36:16,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092962684] [2019-11-23 20:36:16,817 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-11-23 20:36:16,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:16,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-11-23 20:36:16,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=913, Invalid=2509, Unknown=0, NotChecked=0, Total=3422 [2019-11-23 20:36:16,818 INFO L87 Difference]: Start difference. First operand 90 states and 93 transitions. Second operand 59 states. [2019-11-23 20:36:19,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:19,314 INFO L93 Difference]: Finished difference Result 207 states and 216 transitions. [2019-11-23 20:36:19,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-11-23 20:36:19,314 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 89 [2019-11-23 20:36:19,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:19,315 INFO L225 Difference]: With dead ends: 207 [2019-11-23 20:36:19,315 INFO L226 Difference]: Without dead ends: 128 [2019-11-23 20:36:19,317 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1988 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2405, Invalid=7101, Unknown=0, NotChecked=0, Total=9506 [2019-11-23 20:36:19,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-11-23 20:36:19,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 94. [2019-11-23 20:36:19,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-11-23 20:36:19,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2019-11-23 20:36:19,324 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 89 [2019-11-23 20:36:19,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:19,324 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2019-11-23 20:36:19,324 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-11-23 20:36:19,325 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2019-11-23 20:36:19,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-11-23 20:36:19,325 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:19,325 INFO L410 BasicCegarLoop]: trace histogram [38, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:19,530 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:19,530 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:19,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:19,530 INFO L82 PathProgramCache]: Analyzing trace with hash 876453055, now seen corresponding path program 7 times [2019-11-23 20:36:19,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:19,530 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025055851] [2019-11-23 20:36:19,531 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:19,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:20,131 INFO L134 CoverageAnalysis]: Checked inductivity of 856 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2019-11-23 20:36:20,132 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025055851] [2019-11-23 20:36:20,132 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352634365] [2019-11-23 20:36:20,132 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:20,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:20,214 INFO L255 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-23 20:36:20,216 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:20,233 INFO L134 CoverageAnalysis]: Checked inductivity of 856 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2019-11-23 20:36:20,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:20,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2019-11-23 20:36:20,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676940992] [2019-11-23 20:36:20,234 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-23 20:36:20,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:20,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-23 20:36:20,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:36:20,234 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand 42 states. [2019-11-23 20:36:20,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:20,289 INFO L93 Difference]: Finished difference Result 148 states and 156 transitions. [2019-11-23 20:36:20,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-11-23 20:36:20,289 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 90 [2019-11-23 20:36:20,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:20,290 INFO L225 Difference]: With dead ends: 148 [2019-11-23 20:36:20,290 INFO L226 Difference]: Without dead ends: 95 [2019-11-23 20:36:20,290 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:36:20,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-11-23 20:36:20,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2019-11-23 20:36:20,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-11-23 20:36:20,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2019-11-23 20:36:20,294 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 90 [2019-11-23 20:36:20,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:20,294 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2019-11-23 20:36:20,294 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-23 20:36:20,294 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2019-11-23 20:36:20,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-23 20:36:20,295 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:20,295 INFO L410 BasicCegarLoop]: trace histogram [39, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:20,495 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:20,496 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:20,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:20,496 INFO L82 PathProgramCache]: Analyzing trace with hash 241256100, now seen corresponding path program 8 times [2019-11-23 20:36:20,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:20,497 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39598453] [2019-11-23 20:36:20,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:20,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:21,387 INFO L134 CoverageAnalysis]: Checked inductivity of 895 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2019-11-23 20:36:21,387 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39598453] [2019-11-23 20:36:21,387 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513259594] [2019-11-23 20:36:21,388 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:21,472 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:36:21,472 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:36:21,473 INFO L255 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 41 conjunts are in the unsatisfiable core [2019-11-23 20:36:21,475 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:21,497 INFO L134 CoverageAnalysis]: Checked inductivity of 895 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2019-11-23 20:36:21,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:21,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2019-11-23 20:36:21,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821881241] [2019-11-23 20:36:21,499 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-23 20:36:21,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:21,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-23 20:36:21,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:36:21,500 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand 43 states. [2019-11-23 20:36:21,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:21,561 INFO L93 Difference]: Finished difference Result 149 states and 157 transitions. [2019-11-23 20:36:21,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-23 20:36:21,561 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 91 [2019-11-23 20:36:21,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:21,562 INFO L225 Difference]: With dead ends: 149 [2019-11-23 20:36:21,562 INFO L226 Difference]: Without dead ends: 96 [2019-11-23 20:36:21,562 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:36:21,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-11-23 20:36:21,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2019-11-23 20:36:21,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-11-23 20:36:21,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2019-11-23 20:36:21,569 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 91 [2019-11-23 20:36:21,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:21,571 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2019-11-23 20:36:21,571 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-23 20:36:21,571 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2019-11-23 20:36:21,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-11-23 20:36:21,571 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:21,572 INFO L410 BasicCegarLoop]: trace histogram [40, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:21,775 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:21,775 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:21,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:21,776 INFO L82 PathProgramCache]: Analyzing trace with hash 2024986975, now seen corresponding path program 9 times [2019-11-23 20:36:21,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:21,777 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297352606] [2019-11-23 20:36:21,777 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:21,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:22,520 INFO L134 CoverageAnalysis]: Checked inductivity of 935 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2019-11-23 20:36:22,521 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297352606] [2019-11-23 20:36:22,521 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962677535] [2019-11-23 20:36:22,521 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:22,772 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:36:22,773 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:36:22,774 INFO L255 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:36:22,776 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:22,885 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:36:22,911 INFO L134 CoverageAnalysis]: Checked inductivity of 935 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 890 trivial. 0 not checked. [2019-11-23 20:36:22,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:22,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 9] total 50 [2019-11-23 20:36:22,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198387839] [2019-11-23 20:36:22,912 INFO L442 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-11-23 20:36:22,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:22,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-11-23 20:36:22,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=932, Invalid=1518, Unknown=0, NotChecked=0, Total=2450 [2019-11-23 20:36:22,913 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand 50 states. [2019-11-23 20:36:24,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:24,317 INFO L93 Difference]: Finished difference Result 158 states and 166 transitions. [2019-11-23 20:36:24,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-11-23 20:36:24,318 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 92 [2019-11-23 20:36:24,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:24,319 INFO L225 Difference]: With dead ends: 158 [2019-11-23 20:36:24,319 INFO L226 Difference]: Without dead ends: 105 [2019-11-23 20:36:24,321 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1366 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2995, Invalid=6317, Unknown=0, NotChecked=0, Total=9312 [2019-11-23 20:36:24,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-11-23 20:36:24,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 97. [2019-11-23 20:36:24,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-11-23 20:36:24,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2019-11-23 20:36:24,326 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 92 [2019-11-23 20:36:24,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:24,327 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2019-11-23 20:36:24,327 INFO L463 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-11-23 20:36:24,327 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2019-11-23 20:36:24,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-11-23 20:36:24,327 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:24,327 INFO L410 BasicCegarLoop]: trace histogram [41, 7, 7, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:24,531 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:24,531 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:24,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:24,531 INFO L82 PathProgramCache]: Analyzing trace with hash 2089344042, now seen corresponding path program 28 times [2019-11-23 20:36:24,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:24,532 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456904016] [2019-11-23 20:36:24,532 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:24,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:25,272 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2019-11-23 20:36:25,272 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456904016] [2019-11-23 20:36:25,272 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226572255] [2019-11-23 20:36:25,272 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:25,402 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:36:25,403 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:36:25,405 INFO L255 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 43 conjunts are in the unsatisfiable core [2019-11-23 20:36:25,406 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:25,443 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2019-11-23 20:36:25,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:25,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2019-11-23 20:36:25,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8727946] [2019-11-23 20:36:25,445 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-11-23 20:36:25,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:25,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-11-23 20:36:25,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2019-11-23 20:36:25,446 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand 45 states. [2019-11-23 20:36:25,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:25,535 INFO L93 Difference]: Finished difference Result 151 states and 157 transitions. [2019-11-23 20:36:25,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-11-23 20:36:25,536 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 96 [2019-11-23 20:36:25,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:25,536 INFO L225 Difference]: With dead ends: 151 [2019-11-23 20:36:25,536 INFO L226 Difference]: Without dead ends: 98 [2019-11-23 20:36:25,537 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2019-11-23 20:36:25,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-11-23 20:36:25,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2019-11-23 20:36:25,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-11-23 20:36:25,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 101 transitions. [2019-11-23 20:36:25,543 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 101 transitions. Word has length 96 [2019-11-23 20:36:25,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:25,543 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 101 transitions. [2019-11-23 20:36:25,544 INFO L463 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-11-23 20:36:25,544 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 101 transitions. [2019-11-23 20:36:25,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-11-23 20:36:25,545 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:25,545 INFO L410 BasicCegarLoop]: trace histogram [42, 7, 7, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:25,751 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:25,751 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:25,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:25,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1065141839, now seen corresponding path program 29 times [2019-11-23 20:36:25,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:25,752 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320394111] [2019-11-23 20:36:25,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:25,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:26,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1036 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2019-11-23 20:36:26,801 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320394111] [2019-11-23 20:36:26,801 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651010681] [2019-11-23 20:36:26,801 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true