/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 17:33:10,083 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 17:33:10,088 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 17:33:10,148 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 17:33:10,149 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 17:33:10,152 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 17:33:10,157 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 17:33:10,162 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 17:33:10,165 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 17:33:10,171 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 17:33:10,175 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 17:33:10,176 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 17:33:10,177 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 17:33:10,180 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 17:33:10,182 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 17:33:10,184 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 17:33:10,185 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 17:33:10,188 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 17:33:10,196 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 17:33:10,204 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 17:33:10,206 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 17:33:10,208 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 17:33:10,210 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 17:33:10,213 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 17:33:10,222 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 17:33:10,254 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 17:33:10,256 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 17:33:10,257 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 17:33:10,258 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 17:33:10,305 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 17:33:10,305 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 17:33:10,310 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 17:33:10,310 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 17:33:10,310 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 17:33:10,311 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 17:33:10,311 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 17:33:10,311 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 17:33:10,311 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 17:33:10,311 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 17:33:10,313 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 17:33:10,313 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 17:33:10,313 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 17:33:10,314 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 17:33:10,314 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 17:33:10,314 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 17:33:10,314 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 17:33:10,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:33:10,315 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 17:33:10,315 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 17:33:10,315 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 17:33:10,315 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 17:33:10,316 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 17:33:10,316 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 17:33:10,316 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 17:33:10,316 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 17:33:10,720 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 17:33:10,770 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 17:33:10,773 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 17:33:10,776 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 17:33:10,776 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 17:33:10,777 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound50.c [2021-01-06 17:33:10,863 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/51bfdab3d/15d06c6e47624013927de4f987c9bd90/FLAG5e03fef02 [2021-01-06 17:33:11,525 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 17:33:11,525 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound50.c [2021-01-06 17:33:11,537 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/51bfdab3d/15d06c6e47624013927de4f987c9bd90/FLAG5e03fef02 [2021-01-06 17:33:11,865 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/51bfdab3d/15d06c6e47624013927de4f987c9bd90 [2021-01-06 17:33:11,869 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 17:33:11,874 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 17:33:11,876 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 17:33:11,877 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 17:33:11,882 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 17:33:11,883 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:33:11" (1/1) ... [2021-01-06 17:33:11,884 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@773c3bf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:11, skipping insertion in model container [2021-01-06 17:33:11,884 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:33:11" (1/1) ... [2021-01-06 17:33:11,893 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 17:33:11,911 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 17:33:12,062 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound50.c[490,503] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~xy~0,] left hand side expression in assignment: lhs: VariableLHS[~yy~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] [2021-01-06 17:33:12,090 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:33:12,106 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 17:33:12,124 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound50.c[490,503] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~xy~0,] left hand side expression in assignment: lhs: VariableLHS[~yy~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] [2021-01-06 17:33:12,167 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:33:12,194 INFO L208 MainTranslator]: Completed translation [2021-01-06 17:33:12,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:12 WrapperNode [2021-01-06 17:33:12,195 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 17:33:12,201 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 17:33:12,201 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 17:33:12,201 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 17:33:12,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:12" (1/1) ... [2021-01-06 17:33:12,232 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:12" (1/1) ... [2021-01-06 17:33:12,280 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 17:33:12,283 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 17:33:12,284 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 17:33:12,285 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 17:33:12,300 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:12" (1/1) ... [2021-01-06 17:33:12,300 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:12" (1/1) ... [2021-01-06 17:33:12,305 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:12" (1/1) ... [2021-01-06 17:33:12,306 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:12" (1/1) ... [2021-01-06 17:33:12,324 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:12" (1/1) ... [2021-01-06 17:33:12,338 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:12" (1/1) ... [2021-01-06 17:33:12,342 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:12" (1/1) ... [2021-01-06 17:33:12,350 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 17:33:12,351 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 17:33:12,351 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 17:33:12,351 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 17:33:12,353 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:12" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:33:12,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 17:33:12,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 17:33:12,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 17:33:12,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 17:33:13,081 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 17:33:13,081 INFO L299 CfgBuilder]: Removed 30 assume(true) statements. [2021-01-06 17:33:13,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:33:13 BoogieIcfgContainer [2021-01-06 17:33:13,083 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 17:33:13,085 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 17:33:13,085 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 17:33:13,089 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 17:33:13,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 05:33:11" (1/3) ... [2021-01-06 17:33:13,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2df34f90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:33:13, skipping insertion in model container [2021-01-06 17:33:13,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:12" (2/3) ... [2021-01-06 17:33:13,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2df34f90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:33:13, skipping insertion in model container [2021-01-06 17:33:13,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:33:13" (3/3) ... [2021-01-06 17:33:13,092 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound50.c [2021-01-06 17:33:13,099 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 17:33:13,104 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2021-01-06 17:33:13,124 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-01-06 17:33:13,152 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 17:33:13,152 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 17:33:13,152 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 17:33:13,152 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 17:33:13,152 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 17:33:13,153 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 17:33:13,153 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 17:33:13,153 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 17:33:13,174 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2021-01-06 17:33:13,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 17:33:13,181 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:13,182 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:13,182 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:13,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:13,192 INFO L82 PathProgramCache]: Analyzing trace with hash 823104699, now seen corresponding path program 1 times [2021-01-06 17:33:13,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:13,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590124407] [2021-01-06 17:33:13,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:13,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:13,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:13,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590124407] [2021-01-06 17:33:13,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:33:13,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 17:33:13,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641368431] [2021-01-06 17:33:13,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 17:33:13,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:13,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 17:33:13,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:33:13,405 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 2 states. [2021-01-06 17:33:13,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:13,430 INFO L93 Difference]: Finished difference Result 87 states and 120 transitions. [2021-01-06 17:33:13,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 17:33:13,432 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2021-01-06 17:33:13,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:13,442 INFO L225 Difference]: With dead ends: 87 [2021-01-06 17:33:13,442 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 17:33:13,446 INFO L677 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 [2021-01-06 17:33:13,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 17:33:13,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-01-06 17:33:13,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 17:33:13,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-01-06 17:33:13,492 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 17 [2021-01-06 17:33:13,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:13,493 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-01-06 17:33:13,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 17:33:13,493 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-01-06 17:33:13,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:33:13,497 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:13,497 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:13,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 17:33:13,498 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:13,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:13,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1122121916, now seen corresponding path program 1 times [2021-01-06 17:33:13,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:13,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078416312] [2021-01-06 17:33:13,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:13,526 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:13,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [429236062] [2021-01-06 17:33:13,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:33:13,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:13,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 17:33:13,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:13,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:13,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078416312] [2021-01-06 17:33:13,774 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:13,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429236062] [2021-01-06 17:33:13,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:33:13,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 17:33:13,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225599811] [2021-01-06 17:33:13,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:33:13,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:13,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:33:13,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:33:13,779 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 5 states. [2021-01-06 17:33:13,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:13,978 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2021-01-06 17:33:13,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:33:13,979 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2021-01-06 17:33:13,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:13,980 INFO L225 Difference]: With dead ends: 69 [2021-01-06 17:33:13,980 INFO L226 Difference]: Without dead ends: 61 [2021-01-06 17:33:13,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:33:13,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-01-06 17:33:13,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 43. [2021-01-06 17:33:13,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 17:33:13,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-01-06 17:33:13,991 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 18 [2021-01-06 17:33:13,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:13,992 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-01-06 17:33:13,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:33:13,992 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-01-06 17:33:13,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:33:13,993 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:13,993 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:14,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 17:33:14,210 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:14,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:14,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1122125890, now seen corresponding path program 1 times [2021-01-06 17:33:14,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:14,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647104036] [2021-01-06 17:33:14,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:14,234 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:14,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1539003915] [2021-01-06 17:33:14,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:33:14,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:14,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 17:33:14,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:14,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:14,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647104036] [2021-01-06 17:33:14,498 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:14,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539003915] [2021-01-06 17:33:14,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:33:14,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-06 17:33:14,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889618913] [2021-01-06 17:33:14,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:33:14,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:14,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:33:14,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:33:14,501 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 8 states. [2021-01-06 17:33:14,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:14,962 INFO L93 Difference]: Finished difference Result 79 states and 82 transitions. [2021-01-06 17:33:14,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:33:14,963 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2021-01-06 17:33:14,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:14,965 INFO L225 Difference]: With dead ends: 79 [2021-01-06 17:33:14,965 INFO L226 Difference]: Without dead ends: 77 [2021-01-06 17:33:14,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:33:14,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-01-06 17:33:14,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 45. [2021-01-06 17:33:14,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-01-06 17:33:14,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-01-06 17:33:14,974 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 18 [2021-01-06 17:33:14,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:14,975 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-01-06 17:33:14,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:33:14,975 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-01-06 17:33:14,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:33:14,976 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:14,976 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:15,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:15,194 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:15,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:15,195 INFO L82 PathProgramCache]: Analyzing trace with hash 326346277, now seen corresponding path program 1 times [2021-01-06 17:33:15,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:15,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854846297] [2021-01-06 17:33:15,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:15,214 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:15,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1475053440] [2021-01-06 17:33:15,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:33:15,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:15,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 17:33:15,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:15,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:15,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854846297] [2021-01-06 17:33:15,674 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:15,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475053440] [2021-01-06 17:33:15,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:33:15,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-01-06 17:33:15,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369534159] [2021-01-06 17:33:15,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 17:33:15,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:15,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 17:33:15,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:33:15,678 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 10 states. [2021-01-06 17:33:16,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:16,110 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2021-01-06 17:33:16,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 17:33:16,111 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2021-01-06 17:33:16,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:16,112 INFO L225 Difference]: With dead ends: 63 [2021-01-06 17:33:16,112 INFO L226 Difference]: Without dead ends: 61 [2021-01-06 17:33:16,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:33:16,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-01-06 17:33:16,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2021-01-06 17:33:16,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 17:33:16,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2021-01-06 17:33:16,123 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 20 [2021-01-06 17:33:16,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:16,124 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2021-01-06 17:33:16,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 17:33:16,124 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2021-01-06 17:33:16,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:33:16,125 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:16,125 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:16,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:16,341 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:16,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:16,341 INFO L82 PathProgramCache]: Analyzing trace with hash 86317224, now seen corresponding path program 1 times [2021-01-06 17:33:16,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:16,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079145794] [2021-01-06 17:33:16,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:16,360 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:16,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [557762342] [2021-01-06 17:33:16,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:33:16,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:16,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 17:33:16,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:16,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:16,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079145794] [2021-01-06 17:33:16,603 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:16,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557762342] [2021-01-06 17:33:16,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:33:16,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-06 17:33:16,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98319658] [2021-01-06 17:33:16,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:33:16,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:16,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:33:16,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:33:16,608 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 8 states. [2021-01-06 17:33:16,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:16,809 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2021-01-06 17:33:16,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:33:16,810 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2021-01-06 17:33:16,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:16,813 INFO L225 Difference]: With dead ends: 61 [2021-01-06 17:33:16,813 INFO L226 Difference]: Without dead ends: 59 [2021-01-06 17:33:16,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:33:16,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-01-06 17:33:16,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2021-01-06 17:33:16,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 17:33:16,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2021-01-06 17:33:16,834 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 22 [2021-01-06 17:33:16,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:16,835 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2021-01-06 17:33:16,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:33:16,835 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2021-01-06 17:33:16,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 17:33:16,836 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:16,836 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:17,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:17,042 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:17,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:17,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1346631627, now seen corresponding path program 1 times [2021-01-06 17:33:17,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:17,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994085371] [2021-01-06 17:33:17,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:17,061 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:17,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [626029455] [2021-01-06 17:33:17,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:33:17,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:17,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 17:33:17,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:17,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:17,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994085371] [2021-01-06 17:33:17,311 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:17,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626029455] [2021-01-06 17:33:17,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:33:17,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-06 17:33:17,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530014577] [2021-01-06 17:33:17,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:33:17,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:17,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:33:17,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:33:17,316 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 7 states. [2021-01-06 17:33:19,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:19,545 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2021-01-06 17:33:19,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:33:19,545 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2021-01-06 17:33:19,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:19,546 INFO L225 Difference]: With dead ends: 63 [2021-01-06 17:33:19,547 INFO L226 Difference]: Without dead ends: 61 [2021-01-06 17:33:19,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:33:19,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-01-06 17:33:19,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2021-01-06 17:33:19,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 17:33:19,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2021-01-06 17:33:19,556 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 24 [2021-01-06 17:33:19,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:19,556 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2021-01-06 17:33:19,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:33:19,556 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2021-01-06 17:33:19,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 17:33:19,557 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:19,558 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:19,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 17:33:19,773 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:19,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:19,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1781730828, now seen corresponding path program 1 times [2021-01-06 17:33:19,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:19,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212960052] [2021-01-06 17:33:19,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:19,792 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:19,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [943774897] [2021-01-06 17:33:19,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:33:19,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:19,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 17:33:19,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:19,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:19,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212960052] [2021-01-06 17:33:19,926 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:19,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943774897] [2021-01-06 17:33:19,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:33:19,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 17:33:19,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793806842] [2021-01-06 17:33:19,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:33:19,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:19,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:33:19,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:33:19,928 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand 6 states. [2021-01-06 17:33:20,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:20,112 INFO L93 Difference]: Finished difference Result 104 states and 113 transitions. [2021-01-06 17:33:20,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 17:33:20,113 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2021-01-06 17:33:20,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:20,114 INFO L225 Difference]: With dead ends: 104 [2021-01-06 17:33:20,114 INFO L226 Difference]: Without dead ends: 102 [2021-01-06 17:33:20,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:33:20,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-01-06 17:33:20,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 74. [2021-01-06 17:33:20,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-01-06 17:33:20,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 82 transitions. [2021-01-06 17:33:20,129 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 82 transitions. Word has length 27 [2021-01-06 17:33:20,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:20,130 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 82 transitions. [2021-01-06 17:33:20,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:33:20,130 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 82 transitions. [2021-01-06 17:33:20,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 17:33:20,131 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:20,131 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:20,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:20,347 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:20,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:20,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1655367537, now seen corresponding path program 1 times [2021-01-06 17:33:20,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:20,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309191647] [2021-01-06 17:33:20,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:20,363 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:20,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2025610188] [2021-01-06 17:33:20,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:33:20,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:20,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:33:20,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:20,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:20,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309191647] [2021-01-06 17:33:20,520 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:20,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025610188] [2021-01-06 17:33:20,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:33:20,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 17:33:20,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317729548] [2021-01-06 17:33:20,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:33:20,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:20,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:33:20,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:33:20,523 INFO L87 Difference]: Start difference. First operand 74 states and 82 transitions. Second operand 7 states. [2021-01-06 17:33:20,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:20,774 INFO L93 Difference]: Finished difference Result 165 states and 177 transitions. [2021-01-06 17:33:20,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:33:20,774 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2021-01-06 17:33:20,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:20,776 INFO L225 Difference]: With dead ends: 165 [2021-01-06 17:33:20,776 INFO L226 Difference]: Without dead ends: 157 [2021-01-06 17:33:20,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:33:20,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-01-06 17:33:20,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 109. [2021-01-06 17:33:20,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2021-01-06 17:33:20,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 131 transitions. [2021-01-06 17:33:20,796 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 131 transitions. Word has length 30 [2021-01-06 17:33:20,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:20,797 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 131 transitions. [2021-01-06 17:33:20,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:33:20,797 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 131 transitions. [2021-01-06 17:33:20,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 17:33:20,798 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:20,798 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:21,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:21,014 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:21,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:21,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1674279834, now seen corresponding path program 1 times [2021-01-06 17:33:21,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:21,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880866228] [2021-01-06 17:33:21,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:21,034 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:21,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [307149123] [2021-01-06 17:33:21,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:33:21,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:21,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-06 17:33:21,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:21,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:21,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880866228] [2021-01-06 17:33:21,271 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:21,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307149123] [2021-01-06 17:33:21,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:33:21,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 17:33:21,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384831624] [2021-01-06 17:33:21,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:33:21,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:21,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:33:21,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:33:21,273 INFO L87 Difference]: Start difference. First operand 109 states and 131 transitions. Second operand 8 states. [2021-01-06 17:33:21,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:21,497 INFO L93 Difference]: Finished difference Result 176 states and 211 transitions. [2021-01-06 17:33:21,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:33:21,498 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2021-01-06 17:33:21,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:21,500 INFO L225 Difference]: With dead ends: 176 [2021-01-06 17:33:21,501 INFO L226 Difference]: Without dead ends: 170 [2021-01-06 17:33:21,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:33:21,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-01-06 17:33:21,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 157. [2021-01-06 17:33:21,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2021-01-06 17:33:21,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 194 transitions. [2021-01-06 17:33:21,527 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 194 transitions. Word has length 32 [2021-01-06 17:33:21,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:21,527 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 194 transitions. [2021-01-06 17:33:21,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:33:21,528 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 194 transitions. [2021-01-06 17:33:21,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 17:33:21,528 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:21,529 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:21,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 17:33:21,743 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:21,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:21,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1629657891, now seen corresponding path program 1 times [2021-01-06 17:33:21,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:21,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949818862] [2021-01-06 17:33:21,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:21,763 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:21,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1165911346] [2021-01-06 17:33:21,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:33:21,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:21,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 63 conjunts are in the unsatisfiable core [2021-01-06 17:33:21,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:22,407 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:22,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949818862] [2021-01-06 17:33:22,408 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:22,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165911346] [2021-01-06 17:33:22,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:33:22,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-01-06 17:33:22,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672915851] [2021-01-06 17:33:22,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 17:33:22,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:22,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 17:33:22,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:33:22,411 INFO L87 Difference]: Start difference. First operand 157 states and 194 transitions. Second operand 16 states. [2021-01-06 17:33:22,792 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 24 [2021-01-06 17:33:23,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:23,227 INFO L93 Difference]: Finished difference Result 167 states and 200 transitions. [2021-01-06 17:33:23,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 17:33:23,228 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 34 [2021-01-06 17:33:23,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:23,229 INFO L225 Difference]: With dead ends: 167 [2021-01-06 17:33:23,229 INFO L226 Difference]: Without dead ends: 165 [2021-01-06 17:33:23,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2021-01-06 17:33:23,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-01-06 17:33:23,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 157. [2021-01-06 17:33:23,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2021-01-06 17:33:23,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 192 transitions. [2021-01-06 17:33:23,250 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 192 transitions. Word has length 34 [2021-01-06 17:33:23,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:23,251 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 192 transitions. [2021-01-06 17:33:23,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 17:33:23,251 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 192 transitions. [2021-01-06 17:33:23,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 17:33:23,252 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:23,252 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:23,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:23,466 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:23,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:23,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1561987776, now seen corresponding path program 1 times [2021-01-06 17:33:23,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:23,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159178073] [2021-01-06 17:33:23,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:23,481 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:23,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2092346278] [2021-01-06 17:33:23,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:33:23,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:23,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 49 conjunts are in the unsatisfiable core [2021-01-06 17:33:23,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:23,991 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:33:24,007 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:33:24,016 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 17:33:24,053 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:24,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159178073] [2021-01-06 17:33:24,054 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:24,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092346278] [2021-01-06 17:33:24,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:33:24,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-01-06 17:33:24,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696945464] [2021-01-06 17:33:24,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 17:33:24,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:24,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 17:33:24,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:33:24,056 INFO L87 Difference]: Start difference. First operand 157 states and 192 transitions. Second operand 12 states. [2021-01-06 17:33:24,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:24,555 INFO L93 Difference]: Finished difference Result 172 states and 205 transitions. [2021-01-06 17:33:24,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 17:33:24,556 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2021-01-06 17:33:24,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:24,557 INFO L225 Difference]: With dead ends: 172 [2021-01-06 17:33:24,557 INFO L226 Difference]: Without dead ends: 170 [2021-01-06 17:33:24,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-01-06 17:33:24,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-01-06 17:33:24,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 157. [2021-01-06 17:33:24,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2021-01-06 17:33:24,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 190 transitions. [2021-01-06 17:33:24,578 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 190 transitions. Word has length 36 [2021-01-06 17:33:24,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:24,578 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 190 transitions. [2021-01-06 17:33:24,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 17:33:24,578 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 190 transitions. [2021-01-06 17:33:24,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 17:33:24,579 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:24,579 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:24,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:24,793 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:24,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:24,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1088491650, now seen corresponding path program 2 times [2021-01-06 17:33:24,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:24,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516702250] [2021-01-06 17:33:24,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:24,808 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:24,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2038096638] [2021-01-06 17:33:24,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:33:24,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:33:24,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:33:24,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 17:33:24,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:25,065 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:25,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516702250] [2021-01-06 17:33:25,066 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:25,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038096638] [2021-01-06 17:33:25,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:33:25,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 17:33:25,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867508266] [2021-01-06 17:33:25,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 17:33:25,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:25,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 17:33:25,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:33:25,068 INFO L87 Difference]: Start difference. First operand 157 states and 190 transitions. Second operand 10 states. [2021-01-06 17:33:25,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:25,338 INFO L93 Difference]: Finished difference Result 264 states and 318 transitions. [2021-01-06 17:33:25,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:33:25,339 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2021-01-06 17:33:25,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:25,341 INFO L225 Difference]: With dead ends: 264 [2021-01-06 17:33:25,341 INFO L226 Difference]: Without dead ends: 262 [2021-01-06 17:33:25,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:33:25,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-01-06 17:33:25,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 202. [2021-01-06 17:33:25,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2021-01-06 17:33:25,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 248 transitions. [2021-01-06 17:33:25,374 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 248 transitions. Word has length 36 [2021-01-06 17:33:25,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:25,374 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 248 transitions. [2021-01-06 17:33:25,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 17:33:25,375 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 248 transitions. [2021-01-06 17:33:25,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 17:33:25,375 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:25,376 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:25,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 17:33:25,588 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:25,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:25,589 INFO L82 PathProgramCache]: Analyzing trace with hash -50686429, now seen corresponding path program 1 times [2021-01-06 17:33:25,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:25,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526938300] [2021-01-06 17:33:25,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:25,600 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:25,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [117781365] [2021-01-06 17:33:25,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:33:25,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:25,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 56 conjunts are in the unsatisfiable core [2021-01-06 17:33:25,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:26,059 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:26,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526938300] [2021-01-06 17:33:26,060 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:26,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117781365] [2021-01-06 17:33:26,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:33:26,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-01-06 17:33:26,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88568362] [2021-01-06 17:33:26,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 17:33:26,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:26,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 17:33:26,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:33:26,062 INFO L87 Difference]: Start difference. First operand 202 states and 248 transitions. Second operand 13 states. [2021-01-06 17:33:26,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:26,734 INFO L93 Difference]: Finished difference Result 247 states and 299 transitions. [2021-01-06 17:33:26,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 17:33:26,735 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2021-01-06 17:33:26,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:26,737 INFO L225 Difference]: With dead ends: 247 [2021-01-06 17:33:26,737 INFO L226 Difference]: Without dead ends: 241 [2021-01-06 17:33:26,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:33:26,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-01-06 17:33:26,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 234. [2021-01-06 17:33:26,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2021-01-06 17:33:26,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 287 transitions. [2021-01-06 17:33:26,769 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 287 transitions. Word has length 39 [2021-01-06 17:33:26,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:26,770 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 287 transitions. [2021-01-06 17:33:26,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 17:33:26,770 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 287 transitions. [2021-01-06 17:33:26,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-01-06 17:33:26,771 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:26,771 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:26,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 17:33:26,985 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:26,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:26,986 INFO L82 PathProgramCache]: Analyzing trace with hash -269629041, now seen corresponding path program 2 times [2021-01-06 17:33:26,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:26,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854781760] [2021-01-06 17:33:26,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:26,997 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:26,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1865895375] [2021-01-06 17:33:26,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:33:27,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:33:27,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:33:27,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 17:33:27,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:27,123 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:27,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854781760] [2021-01-06 17:33:27,124 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:27,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865895375] [2021-01-06 17:33:27,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:33:27,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 17:33:27,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585549882] [2021-01-06 17:33:27,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:33:27,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:27,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:33:27,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:33:27,126 INFO L87 Difference]: Start difference. First operand 234 states and 287 transitions. Second operand 5 states. [2021-01-06 17:33:27,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:27,221 INFO L93 Difference]: Finished difference Result 302 states and 365 transitions. [2021-01-06 17:33:27,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:33:27,222 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2021-01-06 17:33:27,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:27,223 INFO L225 Difference]: With dead ends: 302 [2021-01-06 17:33:27,223 INFO L226 Difference]: Without dead ends: 210 [2021-01-06 17:33:27,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:33:27,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-01-06 17:33:27,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 190. [2021-01-06 17:33:27,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2021-01-06 17:33:27,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 221 transitions. [2021-01-06 17:33:27,251 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 221 transitions. Word has length 44 [2021-01-06 17:33:27,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:27,252 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 221 transitions. [2021-01-06 17:33:27,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:33:27,252 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 221 transitions. [2021-01-06 17:33:27,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-01-06 17:33:27,252 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:27,253 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:27,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 17:33:27,466 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:27,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:27,467 INFO L82 PathProgramCache]: Analyzing trace with hash 75787250, now seen corresponding path program 1 times [2021-01-06 17:33:27,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:27,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532027280] [2021-01-06 17:33:27,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:27,478 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:27,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1952952270] [2021-01-06 17:33:27,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:33:27,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:27,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 84 conjunts are in the unsatisfiable core [2021-01-06 17:33:27,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:28,331 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:33:28,335 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:33:28,389 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:28,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532027280] [2021-01-06 17:33:28,390 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:28,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952952270] [2021-01-06 17:33:28,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:33:28,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-01-06 17:33:28,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763279109] [2021-01-06 17:33:28,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 17:33:28,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:28,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 17:33:28,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:33:28,392 INFO L87 Difference]: Start difference. First operand 190 states and 221 transitions. Second operand 15 states. [2021-01-06 17:33:30,913 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-01-06 17:33:33,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:33,675 INFO L93 Difference]: Finished difference Result 194 states and 223 transitions. [2021-01-06 17:33:33,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 17:33:33,676 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 45 [2021-01-06 17:33:33,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:33,677 INFO L225 Difference]: With dead ends: 194 [2021-01-06 17:33:33,677 INFO L226 Difference]: Without dead ends: 192 [2021-01-06 17:33:33,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2021-01-06 17:33:33,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-01-06 17:33:33,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2021-01-06 17:33:33,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2021-01-06 17:33:33,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 220 transitions. [2021-01-06 17:33:33,704 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 220 transitions. Word has length 45 [2021-01-06 17:33:33,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:33,704 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 220 transitions. [2021-01-06 17:33:33,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 17:33:33,704 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 220 transitions. [2021-01-06 17:33:33,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-01-06 17:33:33,705 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:33,705 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:33,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:33,921 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:33,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:33,922 INFO L82 PathProgramCache]: Analyzing trace with hash -397708876, now seen corresponding path program 3 times [2021-01-06 17:33:33,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:33,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395212387] [2021-01-06 17:33:33,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:33,932 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:33,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1963888721] [2021-01-06 17:33:33,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:33:33,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 17:33:33,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:33:33,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 17:33:33,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:34,072 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-01-06 17:33:34,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395212387] [2021-01-06 17:33:34,073 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:34,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963888721] [2021-01-06 17:33:34,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:33:34,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 17:33:34,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708067856] [2021-01-06 17:33:34,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:33:34,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:34,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:33:34,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:33:34,075 INFO L87 Difference]: Start difference. First operand 190 states and 220 transitions. Second operand 5 states. [2021-01-06 17:33:34,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:34,185 INFO L93 Difference]: Finished difference Result 190 states and 220 transitions. [2021-01-06 17:33:34,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 17:33:34,186 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 45 [2021-01-06 17:33:34,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:34,187 INFO L225 Difference]: With dead ends: 190 [2021-01-06 17:33:34,187 INFO L226 Difference]: Without dead ends: 188 [2021-01-06 17:33:34,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:33:34,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-01-06 17:33:34,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 142. [2021-01-06 17:33:34,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2021-01-06 17:33:34,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 158 transitions. [2021-01-06 17:33:34,210 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 158 transitions. Word has length 45 [2021-01-06 17:33:34,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:34,210 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 158 transitions. [2021-01-06 17:33:34,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:33:34,210 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 158 transitions. [2021-01-06 17:33:34,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-06 17:33:34,211 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:34,211 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:34,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 17:33:34,426 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:34,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:34,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1367297969, now seen corresponding path program 2 times [2021-01-06 17:33:34,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:34,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787502394] [2021-01-06 17:33:34,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:34,448 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:34,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [242536960] [2021-01-06 17:33:34,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:33:34,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:33:34,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:33:34,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 55 conjunts are in the unsatisfiable core [2021-01-06 17:33:34,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:34,887 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:34,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787502394] [2021-01-06 17:33:34,887 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:34,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242536960] [2021-01-06 17:33:34,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:33:34,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-01-06 17:33:34,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199857965] [2021-01-06 17:33:34,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 17:33:34,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:34,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 17:33:34,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:33:34,889 INFO L87 Difference]: Start difference. First operand 142 states and 158 transitions. Second operand 13 states. [2021-01-06 17:33:51,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:51,996 INFO L93 Difference]: Finished difference Result 181 states and 201 transitions. [2021-01-06 17:33:51,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 17:33:51,996 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 48 [2021-01-06 17:33:51,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:51,998 INFO L225 Difference]: With dead ends: 181 [2021-01-06 17:33:51,998 INFO L226 Difference]: Without dead ends: 175 [2021-01-06 17:33:51,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-01-06 17:33:51,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-01-06 17:33:52,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 162. [2021-01-06 17:33:52,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2021-01-06 17:33:52,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 180 transitions. [2021-01-06 17:33:52,025 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 180 transitions. Word has length 48 [2021-01-06 17:33:52,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:52,025 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 180 transitions. [2021-01-06 17:33:52,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 17:33:52,025 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 180 transitions. [2021-01-06 17:33:52,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 17:33:52,026 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:52,026 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:52,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 17:33:52,240 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:52,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:52,241 INFO L82 PathProgramCache]: Analyzing trace with hash 194484878, now seen corresponding path program 3 times [2021-01-06 17:33:52,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:52,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277269390] [2021-01-06 17:33:52,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:52,256 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:52,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [64496139] [2021-01-06 17:33:52,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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