/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/mannadiv_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 08:01:15,148 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 08:01:15,151 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 08:01:15,205 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 08:01:15,206 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 08:01:15,211 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 08:01:15,215 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 08:01:15,220 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 08:01:15,224 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 08:01:15,230 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 08:01:15,234 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 08:01:15,236 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 08:01:15,236 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 08:01:15,239 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 08:01:15,241 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 08:01:15,243 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 08:01:15,257 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 08:01:15,258 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 08:01:15,263 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 08:01:15,267 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 08:01:15,274 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 08:01:15,277 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 08:01:15,279 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 08:01:15,279 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 08:01:15,288 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 08:01:15,307 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 08:01:15,312 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 08:01:15,313 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 08:01:15,314 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 08:01:15,370 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 08:01:15,370 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 08:01:15,372 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 08:01:15,374 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 08:01:15,374 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 08:01:15,374 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 08:01:15,374 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 08:01:15,375 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 08:01:15,375 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 08:01:15,375 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 08:01:15,376 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 08:01:15,377 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 08:01:15,377 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 08:01:15,377 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 08:01:15,377 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 08:01:15,378 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 08:01:15,378 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 08:01:15,378 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 08:01:15,378 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 08:01:15,378 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 08:01:15,379 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 08:01:15,379 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 08:01:15,379 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 08:01:15,379 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 08:01:15,380 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 08:01:15,380 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 08:01:15,792 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 08:01:15,822 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 08:01:15,825 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 08:01:15,826 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 08:01:15,827 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 08:01:15,828 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound100.c [2020-12-23 08:01:15,904 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c5c734a82/d11e18b2676140f0b3502843bd11f427/FLAGcef154c8d [2020-12-23 08:01:16,497 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 08:01:16,497 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound100.c [2020-12-23 08:01:16,506 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c5c734a82/d11e18b2676140f0b3502843bd11f427/FLAGcef154c8d [2020-12-23 08:01:16,859 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c5c734a82/d11e18b2676140f0b3502843bd11f427 [2020-12-23 08:01:16,864 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 08:01:16,866 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 08:01:16,868 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 08:01:16,868 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 08:01:16,872 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 08:01:16,873 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 08:01:16" (1/1) ... [2020-12-23 08:01:16,875 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fd6be86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:16, skipping insertion in model container [2020-12-23 08:01:16,875 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 08:01:16" (1/1) ... [2020-12-23 08:01:16,884 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 08:01:16,900 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 08:01:17,045 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/mannadiv_unwindbound100.c[573,586] left hand side expression in assignment: lhs: VariableLHS[~x1~0,] left hand side expression in assignment: lhs: VariableLHS[~x2~0,] left hand side expression in assignment: lhs: VariableLHS[~y1~0,] left hand side expression in assignment: lhs: VariableLHS[~y2~0,] left hand side expression in assignment: lhs: VariableLHS[~y3~0,] left hand side expression in assignment: lhs: VariableLHS[~y1~0,] left hand side expression in assignment: lhs: VariableLHS[~y2~0,] left hand side expression in assignment: lhs: VariableLHS[~y3~0,] left hand side expression in assignment: lhs: VariableLHS[~y2~0,] left hand side expression in assignment: lhs: VariableLHS[~y3~0,] [2020-12-23 08:01:17,065 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 08:01:17,076 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 08:01:17,092 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/mannadiv_unwindbound100.c[573,586] left hand side expression in assignment: lhs: VariableLHS[~x1~0,] left hand side expression in assignment: lhs: VariableLHS[~x2~0,] left hand side expression in assignment: lhs: VariableLHS[~y1~0,] left hand side expression in assignment: lhs: VariableLHS[~y2~0,] left hand side expression in assignment: lhs: VariableLHS[~y3~0,] left hand side expression in assignment: lhs: VariableLHS[~y1~0,] left hand side expression in assignment: lhs: VariableLHS[~y2~0,] left hand side expression in assignment: lhs: VariableLHS[~y3~0,] left hand side expression in assignment: lhs: VariableLHS[~y2~0,] left hand side expression in assignment: lhs: VariableLHS[~y3~0,] [2020-12-23 08:01:17,099 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 08:01:17,121 INFO L208 MainTranslator]: Completed translation [2020-12-23 08:01:17,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:17 WrapperNode [2020-12-23 08:01:17,122 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 08:01:17,124 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 08:01:17,125 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 08:01:17,125 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 08:01:17,135 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:17" (1/1) ... [2020-12-23 08:01:17,146 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:17" (1/1) ... [2020-12-23 08:01:17,179 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 08:01:17,183 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 08:01:17,183 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 08:01:17,184 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 08:01:17,194 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:17" (1/1) ... [2020-12-23 08:01:17,194 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:17" (1/1) ... [2020-12-23 08:01:17,212 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:17" (1/1) ... [2020-12-23 08:01:17,212 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:17" (1/1) ... [2020-12-23 08:01:17,217 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:17" (1/1) ... [2020-12-23 08:01:17,228 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:17" (1/1) ... [2020-12-23 08:01:17,235 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:17" (1/1) ... [2020-12-23 08:01:17,238 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 08:01:17,244 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 08:01:17,245 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 08:01:17,245 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 08:01:17,246 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:17" (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 [2020-12-23 08:01:17,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 08:01:17,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 08:01:17,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 08:01:17,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 08:01:17,881 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 08:01:17,882 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-23 08:01:17,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 08:01:17 BoogieIcfgContainer [2020-12-23 08:01:17,887 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 08:01:17,892 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 08:01:17,893 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 08:01:17,899 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 08:01:17,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 08:01:16" (1/3) ... [2020-12-23 08:01:17,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a3d6371 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 08:01:17, skipping insertion in model container [2020-12-23 08:01:17,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:17" (2/3) ... [2020-12-23 08:01:17,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a3d6371 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 08:01:17, skipping insertion in model container [2020-12-23 08:01:17,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 08:01:17" (3/3) ... [2020-12-23 08:01:17,927 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound100.c [2020-12-23 08:01:17,938 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 08:01:17,951 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-23 08:01:17,978 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-23 08:01:18,009 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 08:01:18,009 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 08:01:18,009 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 08:01:18,009 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 08:01:18,010 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 08:01:18,010 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 08:01:18,010 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 08:01:18,010 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 08:01:18,028 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-12-23 08:01:18,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 08:01:18,034 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:18,035 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:18,035 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:18,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:18,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1235340721, now seen corresponding path program 1 times [2020-12-23 08:01:18,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:18,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990740249] [2020-12-23 08:01:18,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:18,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:01:18,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:18,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990740249] [2020-12-23 08:01:18,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:01:18,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 08:01:18,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872193457] [2020-12-23 08:01:18,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 08:01:18,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:18,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 08:01:18,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 08:01:18,281 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-12-23 08:01:18,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:18,300 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2020-12-23 08:01:18,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 08:01:18,302 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-12-23 08:01:18,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:18,311 INFO L225 Difference]: With dead ends: 39 [2020-12-23 08:01:18,312 INFO L226 Difference]: Without dead ends: 17 [2020-12-23 08:01:18,315 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 [2020-12-23 08:01:18,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-23 08:01:18,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-23 08:01:18,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 08:01:18,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-12-23 08:01:18,351 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2020-12-23 08:01:18,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:18,351 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-12-23 08:01:18,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 08:01:18,351 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-12-23 08:01:18,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 08:01:18,352 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:18,352 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:18,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 08:01:18,353 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:18,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:18,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1988288018, now seen corresponding path program 1 times [2020-12-23 08:01:18,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:18,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253946429] [2020-12-23 08:01:18,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:18,384 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:18,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [743592922] [2020-12-23 08:01:18,385 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 [2020-12-23 08:01:18,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:01:18,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 08:01:18,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:18,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:18,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253946429] [2020-12-23 08:01:18,665 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:18,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743592922] [2020-12-23 08:01:18,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:01:18,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-23 08:01:18,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241850852] [2020-12-23 08:01:18,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 08:01:18,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:18,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 08:01:18,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-23 08:01:18,669 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 8 states. [2020-12-23 08:01:19,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:19,047 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2020-12-23 08:01:19,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 08:01:19,048 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2020-12-23 08:01:19,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:19,049 INFO L225 Difference]: With dead ends: 32 [2020-12-23 08:01:19,049 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 08:01:19,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2020-12-23 08:01:19,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 08:01:19,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 20. [2020-12-23 08:01:19,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 08:01:19,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-12-23 08:01:19,058 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 10 [2020-12-23 08:01:19,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:19,058 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-12-23 08:01:19,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 08:01:19,059 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-12-23 08:01:19,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 08:01:19,059 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:19,060 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:19,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 08:01:19,274 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:19,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:19,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1507424085, now seen corresponding path program 1 times [2020-12-23 08:01:19,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:19,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488458015] [2020-12-23 08:01:19,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:19,295 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:19,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1459583700] [2020-12-23 08:01:19,296 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 [2020-12-23 08:01:19,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:01:19,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 08:01:19,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:19,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:19,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488458015] [2020-12-23 08:01:19,402 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:19,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459583700] [2020-12-23 08:01:19,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:01:19,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 08:01:19,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005436986] [2020-12-23 08:01:19,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 08:01:19,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:19,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 08:01:19,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 08:01:19,405 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 4 states. [2020-12-23 08:01:19,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:19,419 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-12-23 08:01:19,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 08:01:19,420 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-23 08:01:19,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:19,421 INFO L225 Difference]: With dead ends: 24 [2020-12-23 08:01:19,421 INFO L226 Difference]: Without dead ends: 20 [2020-12-23 08:01:19,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 08:01:19,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-23 08:01:19,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-23 08:01:19,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 08:01:19,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-12-23 08:01:19,427 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 11 [2020-12-23 08:01:19,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:19,427 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-12-23 08:01:19,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 08:01:19,427 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-12-23 08:01:19,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 08:01:19,428 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:19,428 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:19,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:19,643 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:19,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:19,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1189458428, now seen corresponding path program 1 times [2020-12-23 08:01:19,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:19,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082991954] [2020-12-23 08:01:19,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:19,670 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:19,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [273640294] [2020-12-23 08:01:19,674 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 [2020-12-23 08:01:19,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:01:19,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 08:01:19,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:19,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:19,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082991954] [2020-12-23 08:01:19,884 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:19,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273640294] [2020-12-23 08:01:19,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:01:19,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-23 08:01:19,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5622613] [2020-12-23 08:01:19,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 08:01:19,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:19,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 08:01:19,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 08:01:19,887 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 9 states. [2020-12-23 08:01:20,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:20,063 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2020-12-23 08:01:20,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 08:01:20,064 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-12-23 08:01:20,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:20,064 INFO L225 Difference]: With dead ends: 24 [2020-12-23 08:01:20,065 INFO L226 Difference]: Without dead ends: 18 [2020-12-23 08:01:20,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-12-23 08:01:20,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-23 08:01:20,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-12-23 08:01:20,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 08:01:20,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-12-23 08:01:20,070 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2020-12-23 08:01:20,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:20,071 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-12-23 08:01:20,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 08:01:20,071 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-12-23 08:01:20,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 08:01:20,072 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:20,072 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:20,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:20,287 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:20,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:20,287 INFO L82 PathProgramCache]: Analyzing trace with hash -132612007, now seen corresponding path program 1 times [2020-12-23 08:01:20,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:20,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186923380] [2020-12-23 08:01:20,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:20,305 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:20,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1419740468] [2020-12-23 08:01:20,306 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 [2020-12-23 08:01:20,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:01:20,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 08:01:20,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:20,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:20,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186923380] [2020-12-23 08:01:20,398 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:20,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419740468] [2020-12-23 08:01:20,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:20,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-23 08:01:20,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374793732] [2020-12-23 08:01:20,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 08:01:20,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:20,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 08:01:20,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 08:01:20,401 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2020-12-23 08:01:20,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:20,429 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-12-23 08:01:20,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 08:01:20,430 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-12-23 08:01:20,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:20,430 INFO L225 Difference]: With dead ends: 26 [2020-12-23 08:01:20,431 INFO L226 Difference]: Without dead ends: 22 [2020-12-23 08:01:20,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 08:01:20,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-23 08:01:20,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-23 08:01:20,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 08:01:20,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-12-23 08:01:20,437 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 16 [2020-12-23 08:01:20,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:20,437 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-12-23 08:01:20,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 08:01:20,438 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-12-23 08:01:20,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 08:01:20,438 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:20,439 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:20,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:20,656 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:20,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:20,657 INFO L82 PathProgramCache]: Analyzing trace with hash -625728149, now seen corresponding path program 2 times [2020-12-23 08:01:20,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:20,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227223427] [2020-12-23 08:01:20,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:20,677 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:20,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1480731649] [2020-12-23 08:01:20,677 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 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 [2020-12-23 08:01:20,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 08:01:20,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:01:20,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 08:01:20,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:20,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:20,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227223427] [2020-12-23 08:01:20,842 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:20,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480731649] [2020-12-23 08:01:20,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:20,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 08:01:20,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303961124] [2020-12-23 08:01:20,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 08:01:20,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:20,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 08:01:20,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 08:01:20,852 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 6 states. [2020-12-23 08:01:20,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:20,900 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2020-12-23 08:01:20,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 08:01:20,901 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-12-23 08:01:20,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:20,904 INFO L225 Difference]: With dead ends: 31 [2020-12-23 08:01:20,904 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 08:01:20,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-23 08:01:20,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 08:01:20,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-23 08:01:20,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 08:01:20,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-12-23 08:01:20,922 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 21 [2020-12-23 08:01:20,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:20,923 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-12-23 08:01:20,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 08:01:20,923 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-12-23 08:01:20,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 08:01:20,924 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:20,925 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:21,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 08:01:21,138 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:21,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:21,139 INFO L82 PathProgramCache]: Analyzing trace with hash 256826265, now seen corresponding path program 3 times [2020-12-23 08:01:21,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:21,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854900856] [2020-12-23 08:01:21,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:21,155 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:21,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [178839189] [2020-12-23 08:01:21,156 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 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 [2020-12-23 08:01:21,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 08:01:21,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:01:21,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 08:01:21,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:21,329 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:21,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854900856] [2020-12-23 08:01:21,330 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:21,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178839189] [2020-12-23 08:01:21,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:21,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 08:01:21,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689778578] [2020-12-23 08:01:21,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 08:01:21,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:21,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 08:01:21,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 08:01:21,333 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 7 states. [2020-12-23 08:01:21,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:21,389 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-12-23 08:01:21,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 08:01:21,389 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-12-23 08:01:21,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:21,390 INFO L225 Difference]: With dead ends: 36 [2020-12-23 08:01:21,390 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 08:01:21,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-23 08:01:21,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 08:01:21,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-23 08:01:21,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 08:01:21,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-12-23 08:01:21,398 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 26 [2020-12-23 08:01:21,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:21,398 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-12-23 08:01:21,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 08:01:21,399 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-12-23 08:01:21,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 08:01:21,400 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:21,400 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:21,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:21,616 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:21,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:21,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1955278293, now seen corresponding path program 4 times [2020-12-23 08:01:21,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:21,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753401618] [2020-12-23 08:01:21,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:21,641 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:21,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1833660435] [2020-12-23 08:01:21,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2020-12-23 08:01:21,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 08:01:21,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:01:21,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 08:01:21,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:21,805 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:21,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753401618] [2020-12-23 08:01:21,806 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:21,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833660435] [2020-12-23 08:01:21,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:21,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 08:01:21,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491687336] [2020-12-23 08:01:21,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 08:01:21,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:21,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 08:01:21,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-23 08:01:21,808 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 8 states. [2020-12-23 08:01:21,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:21,875 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2020-12-23 08:01:21,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 08:01:21,875 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-12-23 08:01:21,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:21,876 INFO L225 Difference]: With dead ends: 41 [2020-12-23 08:01:21,876 INFO L226 Difference]: Without dead ends: 37 [2020-12-23 08:01:21,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-12-23 08:01:21,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-23 08:01:21,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-23 08:01:21,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 08:01:21,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-12-23 08:01:21,884 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 31 [2020-12-23 08:01:21,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:21,884 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-12-23 08:01:21,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 08:01:21,884 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-12-23 08:01:21,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 08:01:21,885 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:21,885 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:22,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:22,101 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:22,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:22,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1615059239, now seen corresponding path program 5 times [2020-12-23 08:01:22,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:22,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367470035] [2020-12-23 08:01:22,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:22,117 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:22,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1571960278] [2020-12-23 08:01:22,118 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2020-12-23 08:01:22,186 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 08:01:22,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:01:22,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 08:01:22,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:22,287 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:22,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367470035] [2020-12-23 08:01:22,287 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:22,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571960278] [2020-12-23 08:01:22,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:22,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 08:01:22,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19014199] [2020-12-23 08:01:22,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 08:01:22,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:22,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 08:01:22,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-12-23 08:01:22,290 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 9 states. [2020-12-23 08:01:22,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:22,409 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2020-12-23 08:01:22,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 08:01:22,410 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-12-23 08:01:22,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:22,410 INFO L225 Difference]: With dead ends: 46 [2020-12-23 08:01:22,411 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 08:01:22,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-12-23 08:01:22,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 08:01:22,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-12-23 08:01:22,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 08:01:22,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-12-23 08:01:22,419 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 36 [2020-12-23 08:01:22,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:22,420 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-12-23 08:01:22,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 08:01:22,420 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-12-23 08:01:22,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 08:01:22,421 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:22,421 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:22,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 08:01:22,636 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:22,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:22,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1613459733, now seen corresponding path program 6 times [2020-12-23 08:01:22,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:22,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308243420] [2020-12-23 08:01:22,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:22,651 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:22,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1699750043] [2020-12-23 08:01:22,652 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-12-23 08:01:22,755 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 08:01:22,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:01:22,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 08:01:22,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:22,876 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:22,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308243420] [2020-12-23 08:01:22,876 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:22,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699750043] [2020-12-23 08:01:22,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:22,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 08:01:22,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074575465] [2020-12-23 08:01:22,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 08:01:22,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:22,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 08:01:22,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-12-23 08:01:22,879 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 10 states. [2020-12-23 08:01:22,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:22,969 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2020-12-23 08:01:22,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 08:01:22,970 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-12-23 08:01:22,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:22,970 INFO L225 Difference]: With dead ends: 51 [2020-12-23 08:01:22,971 INFO L226 Difference]: Without dead ends: 47 [2020-12-23 08:01:22,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2020-12-23 08:01:22,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-23 08:01:22,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-12-23 08:01:22,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 08:01:22,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2020-12-23 08:01:22,979 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 41 [2020-12-23 08:01:22,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:22,979 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2020-12-23 08:01:22,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 08:01:22,979 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2020-12-23 08:01:22,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 08:01:22,980 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:22,980 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:23,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:23,195 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:23,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:23,197 INFO L82 PathProgramCache]: Analyzing trace with hash -2055970279, now seen corresponding path program 7 times [2020-12-23 08:01:23,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:23,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454204950] [2020-12-23 08:01:23,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:23,209 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:23,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1256540485] [2020-12-23 08:01:23,210 INFO L93 rtionOrderModulation]: Changing assertion order to 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 [2020-12-23 08:01:23,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:01:23,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 08:01:23,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:23,394 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:23,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454204950] [2020-12-23 08:01:23,395 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:23,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256540485] [2020-12-23 08:01:23,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:23,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 08:01:23,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247148224] [2020-12-23 08:01:23,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 08:01:23,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:23,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 08:01:23,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-12-23 08:01:23,397 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 11 states. [2020-12-23 08:01:23,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:23,510 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-12-23 08:01:23,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 08:01:23,511 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2020-12-23 08:01:23,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:23,512 INFO L225 Difference]: With dead ends: 56 [2020-12-23 08:01:23,512 INFO L226 Difference]: Without dead ends: 52 [2020-12-23 08:01:23,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2020-12-23 08:01:23,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-23 08:01:23,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-12-23 08:01:23,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 08:01:23,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2020-12-23 08:01:23,522 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 46 [2020-12-23 08:01:23,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:23,535 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2020-12-23 08:01:23,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 08:01:23,536 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2020-12-23 08:01:23,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 08:01:23,537 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:23,537 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:23,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:23,738 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:23,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:23,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1472242773, now seen corresponding path program 8 times [2020-12-23 08:01:23,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:23,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074804644] [2020-12-23 08:01:23,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:23,753 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:23,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [373366968] [2020-12-23 08:01:23,753 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 [2020-12-23 08:01:23,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 08:01:23,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:01:23,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 08:01:23,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:24,015 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:24,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074804644] [2020-12-23 08:01:24,016 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:24,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373366968] [2020-12-23 08:01:24,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:24,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-23 08:01:24,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760375851] [2020-12-23 08:01:24,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 08:01:24,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:24,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 08:01:24,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-12-23 08:01:24,018 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand 12 states. [2020-12-23 08:01:24,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:24,164 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2020-12-23 08:01:24,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 08:01:24,165 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-12-23 08:01:24,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:24,166 INFO L225 Difference]: With dead ends: 61 [2020-12-23 08:01:24,166 INFO L226 Difference]: Without dead ends: 57 [2020-12-23 08:01:24,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2020-12-23 08:01:24,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-23 08:01:24,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-12-23 08:01:24,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 08:01:24,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2020-12-23 08:01:24,176 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 51 [2020-12-23 08:01:24,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:24,177 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2020-12-23 08:01:24,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 08:01:24,177 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2020-12-23 08:01:24,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-23 08:01:24,178 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:24,178 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:24,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 08:01:24,394 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:24,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:24,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1819570855, now seen corresponding path program 9 times [2020-12-23 08:01:24,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:24,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097123103] [2020-12-23 08:01:24,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:24,407 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:24,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1194185591] [2020-12-23 08:01:24,408 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 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 [2020-12-23 08:01:24,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 08:01:24,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:01:24,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 08:01:24,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:24,726 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:24,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097123103] [2020-12-23 08:01:24,727 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:24,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194185591] [2020-12-23 08:01:24,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:24,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-23 08:01:24,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680372555] [2020-12-23 08:01:24,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 08:01:24,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:24,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 08:01:24,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-12-23 08:01:24,730 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand 13 states. [2020-12-23 08:01:24,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:24,875 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2020-12-23 08:01:24,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 08:01:24,876 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2020-12-23 08:01:24,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:24,877 INFO L225 Difference]: With dead ends: 66 [2020-12-23 08:01:24,877 INFO L226 Difference]: Without dead ends: 62 [2020-12-23 08:01:24,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2020-12-23 08:01:24,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-23 08:01:24,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-12-23 08:01:24,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-23 08:01:24,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2020-12-23 08:01:24,887 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 56 [2020-12-23 08:01:24,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:24,888 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2020-12-23 08:01:24,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 08:01:24,888 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2020-12-23 08:01:24,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-23 08:01:24,889 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:24,889 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:25,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 08:01:25,104 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:25,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:25,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1641990037, now seen corresponding path program 10 times [2020-12-23 08:01:25,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:25,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630901278] [2020-12-23 08:01:25,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:25,123 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:25,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [766199295] [2020-12-23 08:01:25,126 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2020-12-23 08:01:25,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 08:01:25,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:01:25,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 08:01:25,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:25,406 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:25,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630901278] [2020-12-23 08:01:25,407 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:25,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766199295] [2020-12-23 08:01:25,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:25,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-23 08:01:25,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407476258] [2020-12-23 08:01:25,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 08:01:25,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:25,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 08:01:25,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-12-23 08:01:25,410 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand 14 states. [2020-12-23 08:01:25,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:25,577 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2020-12-23 08:01:25,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 08:01:25,578 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2020-12-23 08:01:25,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:25,579 INFO L225 Difference]: With dead ends: 71 [2020-12-23 08:01:25,579 INFO L226 Difference]: Without dead ends: 67 [2020-12-23 08:01:25,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2020-12-23 08:01:25,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-23 08:01:25,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-12-23 08:01:25,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-23 08:01:25,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2020-12-23 08:01:25,589 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 61 [2020-12-23 08:01:25,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:25,590 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2020-12-23 08:01:25,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 08:01:25,590 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2020-12-23 08:01:25,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-23 08:01:25,591 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:25,591 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:25,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 08:01:25,806 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:25,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:25,807 INFO L82 PathProgramCache]: Analyzing trace with hash -736778087, now seen corresponding path program 11 times [2020-12-23 08:01:25,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:25,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241432160] [2020-12-23 08:01:25,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:25,841 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:25,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [325985762] [2020-12-23 08:01:25,844 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2020-12-23 08:01:25,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-23 08:01:25,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:01:25,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 08:01:25,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:26,150 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:26,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241432160] [2020-12-23 08:01:26,151 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:26,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325985762] [2020-12-23 08:01:26,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:26,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-12-23 08:01:26,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151414594] [2020-12-23 08:01:26,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 08:01:26,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:26,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 08:01:26,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-12-23 08:01:26,154 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand 15 states. [2020-12-23 08:01:26,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:26,339 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2020-12-23 08:01:26,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 08:01:26,340 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 66 [2020-12-23 08:01:26,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:26,341 INFO L225 Difference]: With dead ends: 76 [2020-12-23 08:01:26,341 INFO L226 Difference]: Without dead ends: 72 [2020-12-23 08:01:26,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=247, Invalid=403, Unknown=0, NotChecked=0, Total=650 [2020-12-23 08:01:26,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-23 08:01:26,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-12-23 08:01:26,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-23 08:01:26,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2020-12-23 08:01:26,351 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 66 [2020-12-23 08:01:26,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:26,352 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2020-12-23 08:01:26,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 08:01:26,352 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2020-12-23 08:01:26,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-23 08:01:26,353 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:26,353 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:26,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:26,564 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:26,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:26,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1545198293, now seen corresponding path program 12 times [2020-12-23 08:01:26,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:26,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181958524] [2020-12-23 08:01:26,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:26,575 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:26,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1086699457] [2020-12-23 08:01:26,575 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-12-23 08:01:26,703 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 08:01:26,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:01:26,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 08:01:26,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:26,989 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:26,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181958524] [2020-12-23 08:01:26,989 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:26,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086699457] [2020-12-23 08:01:26,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:26,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-12-23 08:01:26,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725219147] [2020-12-23 08:01:26,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 08:01:26,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:26,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 08:01:26,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-12-23 08:01:26,994 INFO L87 Difference]: Start difference. First operand 72 states and 84 transitions. Second operand 16 states. [2020-12-23 08:01:27,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:27,204 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2020-12-23 08:01:27,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 08:01:27,204 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 71 [2020-12-23 08:01:27,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:27,205 INFO L225 Difference]: With dead ends: 81 [2020-12-23 08:01:27,205 INFO L226 Difference]: Without dead ends: 77 [2020-12-23 08:01:27,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=287, Invalid=469, Unknown=0, NotChecked=0, Total=756 [2020-12-23 08:01:27,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-23 08:01:27,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-12-23 08:01:27,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-23 08:01:27,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 90 transitions. [2020-12-23 08:01:27,224 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 90 transitions. Word has length 71 [2020-12-23 08:01:27,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:27,225 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 90 transitions. [2020-12-23 08:01:27,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 08:01:27,225 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 90 transitions. [2020-12-23 08:01:27,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-23 08:01:27,230 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:27,230 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:27,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 08:01:27,445 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:27,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:27,446 INFO L82 PathProgramCache]: Analyzing trace with hash -936987687, now seen corresponding path program 13 times [2020-12-23 08:01:27,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:27,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905307622] [2020-12-23 08:01:27,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:27,471 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:27,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [894250619] [2020-12-23 08:01:27,472 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-12-23 08:01:27,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:01:27,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 08:01:27,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:27,831 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:27,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905307622] [2020-12-23 08:01:27,832 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:27,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894250619] [2020-12-23 08:01:27,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:27,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-12-23 08:01:27,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223407246] [2020-12-23 08:01:27,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 08:01:27,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:27,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 08:01:27,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-12-23 08:01:27,834 INFO L87 Difference]: Start difference. First operand 77 states and 90 transitions. Second operand 17 states. [2020-12-23 08:01:28,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:28,058 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2020-12-23 08:01:28,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 08:01:28,058 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2020-12-23 08:01:28,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:28,059 INFO L225 Difference]: With dead ends: 86 [2020-12-23 08:01:28,059 INFO L226 Difference]: Without dead ends: 82 [2020-12-23 08:01:28,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=330, Invalid=540, Unknown=0, NotChecked=0, Total=870 [2020-12-23 08:01:28,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-23 08:01:28,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-12-23 08:01:28,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-23 08:01:28,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 96 transitions. [2020-12-23 08:01:28,068 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 96 transitions. Word has length 76 [2020-12-23 08:01:28,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:28,068 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 96 transitions. [2020-12-23 08:01:28,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 08:01:28,069 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 96 transitions. [2020-12-23 08:01:28,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-23 08:01:28,069 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:28,070 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:28,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 08:01:28,285 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:28,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:28,286 INFO L82 PathProgramCache]: Analyzing trace with hash -990240277, now seen corresponding path program 14 times [2020-12-23 08:01:28,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:28,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857913546] [2020-12-23 08:01:28,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:28,296 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:28,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1442753198] [2020-12-23 08:01:28,297 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 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 [2020-12-23 08:01:28,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 08:01:28,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:01:28,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 08:01:28,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:28,666 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:28,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857913546] [2020-12-23 08:01:28,667 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:28,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442753198] [2020-12-23 08:01:28,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:28,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-12-23 08:01:28,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707166583] [2020-12-23 08:01:28,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 08:01:28,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:28,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 08:01:28,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-12-23 08:01:28,672 INFO L87 Difference]: Start difference. First operand 82 states and 96 transitions. Second operand 18 states. [2020-12-23 08:01:28,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:28,921 INFO L93 Difference]: Finished difference Result 91 states and 106 transitions. [2020-12-23 08:01:28,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 08:01:28,922 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 81 [2020-12-23 08:01:28,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:28,923 INFO L225 Difference]: With dead ends: 91 [2020-12-23 08:01:28,923 INFO L226 Difference]: Without dead ends: 87 [2020-12-23 08:01:28,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=376, Invalid=616, Unknown=0, NotChecked=0, Total=992 [2020-12-23 08:01:28,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-23 08:01:28,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-12-23 08:01:28,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-23 08:01:28,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 102 transitions. [2020-12-23 08:01:28,933 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 102 transitions. Word has length 81 [2020-12-23 08:01:28,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:28,933 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 102 transitions. [2020-12-23 08:01:28,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 08:01:28,933 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 102 transitions. [2020-12-23 08:01:28,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-23 08:01:28,934 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:28,934 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:29,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 08:01:29,150 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:29,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:29,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1479364839, now seen corresponding path program 15 times [2020-12-23 08:01:29,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:29,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114685073] [2020-12-23 08:01:29,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:29,163 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:29,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [817857493] [2020-12-23 08:01:29,164 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:29,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-23 08:01:29,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:01:29,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 08:01:29,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:29,586 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:29,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114685073] [2020-12-23 08:01:29,586 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:29,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817857493] [2020-12-23 08:01:29,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:29,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-12-23 08:01:29,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049240736] [2020-12-23 08:01:29,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 08:01:29,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:29,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 08:01:29,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-12-23 08:01:29,589 INFO L87 Difference]: Start difference. First operand 87 states and 102 transitions. Second operand 19 states. [2020-12-23 08:01:29,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:29,881 INFO L93 Difference]: Finished difference Result 96 states and 112 transitions. [2020-12-23 08:01:29,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 08:01:29,881 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 86 [2020-12-23 08:01:29,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:29,882 INFO L225 Difference]: With dead ends: 96 [2020-12-23 08:01:29,882 INFO L226 Difference]: Without dead ends: 92 [2020-12-23 08:01:29,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=425, Invalid=697, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 08:01:29,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-23 08:01:29,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-12-23 08:01:29,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-23 08:01:29,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 108 transitions. [2020-12-23 08:01:29,891 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 108 transitions. Word has length 86 [2020-12-23 08:01:29,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:29,891 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 108 transitions. [2020-12-23 08:01:29,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 08:01:29,891 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 108 transitions. [2020-12-23 08:01:29,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-23 08:01:29,892 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:29,892 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:30,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:30,107 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:30,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:30,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1245106517, now seen corresponding path program 16 times [2020-12-23 08:01:30,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:30,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208932834] [2020-12-23 08:01:30,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:30,118 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:30,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [348436967] [2020-12-23 08:01:30,118 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:30,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 08:01:30,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:01:30,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 08:01:30,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:30,554 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:30,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208932834] [2020-12-23 08:01:30,555 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:30,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348436967] [2020-12-23 08:01:30,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:30,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-12-23 08:01:30,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30107167] [2020-12-23 08:01:30,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 08:01:30,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:30,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 08:01:30,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-12-23 08:01:30,557 INFO L87 Difference]: Start difference. First operand 92 states and 108 transitions. Second operand 20 states. [2020-12-23 08:01:30,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:30,869 INFO L93 Difference]: Finished difference Result 101 states and 118 transitions. [2020-12-23 08:01:30,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 08:01:30,869 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 91 [2020-12-23 08:01:30,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:30,870 INFO L225 Difference]: With dead ends: 101 [2020-12-23 08:01:30,871 INFO L226 Difference]: Without dead ends: 97 [2020-12-23 08:01:30,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=477, Invalid=783, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 08:01:30,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-23 08:01:30,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-12-23 08:01:30,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-23 08:01:30,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 114 transitions. [2020-12-23 08:01:30,879 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 114 transitions. Word has length 91 [2020-12-23 08:01:30,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:30,879 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 114 transitions. [2020-12-23 08:01:30,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 08:01:30,880 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 114 transitions. [2020-12-23 08:01:30,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-23 08:01:30,881 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:30,881 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:31,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:31,095 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:31,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:31,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1574069671, now seen corresponding path program 17 times [2020-12-23 08:01:31,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:31,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133371763] [2020-12-23 08:01:31,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:31,106 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:31,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [81161669] [2020-12-23 08:01:31,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:31,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-23 08:01:31,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:01:31,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 08:01:31,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:31,597 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:31,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133371763] [2020-12-23 08:01:31,597 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:31,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81161669] [2020-12-23 08:01:31,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:31,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-12-23 08:01:31,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80655977] [2020-12-23 08:01:31,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 08:01:31,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:31,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 08:01:31,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-12-23 08:01:31,600 INFO L87 Difference]: Start difference. First operand 97 states and 114 transitions. Second operand 21 states. [2020-12-23 08:01:31,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:31,996 INFO L93 Difference]: Finished difference Result 106 states and 124 transitions. [2020-12-23 08:01:31,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 08:01:31,997 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 96 [2020-12-23 08:01:31,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:31,998 INFO L225 Difference]: With dead ends: 106 [2020-12-23 08:01:31,998 INFO L226 Difference]: Without dead ends: 102 [2020-12-23 08:01:31,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=532, Invalid=874, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 08:01:32,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-23 08:01:32,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-12-23 08:01:32,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-23 08:01:32,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 120 transitions. [2020-12-23 08:01:32,008 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 120 transitions. Word has length 96 [2020-12-23 08:01:32,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:32,009 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 120 transitions. [2020-12-23 08:01:32,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 08:01:32,009 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 120 transitions. [2020-12-23 08:01:32,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-23 08:01:32,010 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:32,010 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:32,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 08:01:32,223 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:32,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:32,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1816179861, now seen corresponding path program 18 times [2020-12-23 08:01:32,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:32,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183687986] [2020-12-23 08:01:32,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:32,233 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:32,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1183185602] [2020-12-23 08:01:32,234 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:32,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-23 08:01:32,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:01:32,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 08:01:32,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:32,848 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:32,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183687986] [2020-12-23 08:01:32,849 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:32,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183185602] [2020-12-23 08:01:32,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:32,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-12-23 08:01:32,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393220808] [2020-12-23 08:01:32,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 08:01:32,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:32,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 08:01:32,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-12-23 08:01:32,853 INFO L87 Difference]: Start difference. First operand 102 states and 120 transitions. Second operand 22 states. [2020-12-23 08:01:33,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:33,253 INFO L93 Difference]: Finished difference Result 111 states and 130 transitions. [2020-12-23 08:01:33,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 08:01:33,255 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 101 [2020-12-23 08:01:33,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:33,256 INFO L225 Difference]: With dead ends: 111 [2020-12-23 08:01:33,257 INFO L226 Difference]: Without dead ends: 107 [2020-12-23 08:01:33,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=590, Invalid=970, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 08:01:33,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-23 08:01:33,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-12-23 08:01:33,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-23 08:01:33,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 126 transitions. [2020-12-23 08:01:33,266 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 126 transitions. Word has length 101 [2020-12-23 08:01:33,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:33,266 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 126 transitions. [2020-12-23 08:01:33,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 08:01:33,267 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 126 transitions. [2020-12-23 08:01:33,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-23 08:01:33,268 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:33,268 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:33,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 08:01:33,477 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:33,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:33,477 INFO L82 PathProgramCache]: Analyzing trace with hash 491484569, now seen corresponding path program 19 times [2020-12-23 08:01:33,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:33,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961288364] [2020-12-23 08:01:33,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:33,486 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:33,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [588827354] [2020-12-23 08:01:33,487 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:33,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:01:33,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 08:01:33,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:34,042 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:34,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961288364] [2020-12-23 08:01:34,042 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:34,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588827354] [2020-12-23 08:01:34,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:34,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-12-23 08:01:34,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552269955] [2020-12-23 08:01:34,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 08:01:34,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:34,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 08:01:34,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-12-23 08:01:34,044 INFO L87 Difference]: Start difference. First operand 107 states and 126 transitions. Second operand 23 states. [2020-12-23 08:01:34,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:34,464 INFO L93 Difference]: Finished difference Result 116 states and 136 transitions. [2020-12-23 08:01:34,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 08:01:34,464 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 106 [2020-12-23 08:01:34,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:34,465 INFO L225 Difference]: With dead ends: 116 [2020-12-23 08:01:34,465 INFO L226 Difference]: Without dead ends: 112 [2020-12-23 08:01:34,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=651, Invalid=1071, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 08:01:34,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-23 08:01:34,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2020-12-23 08:01:34,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-23 08:01:34,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 132 transitions. [2020-12-23 08:01:34,476 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 132 transitions. Word has length 106 [2020-12-23 08:01:34,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:34,476 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 132 transitions. [2020-12-23 08:01:34,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 08:01:34,476 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 132 transitions. [2020-12-23 08:01:34,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-23 08:01:34,477 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:34,477 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:34,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:34,693 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:34,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:34,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1521977301, now seen corresponding path program 20 times [2020-12-23 08:01:34,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:34,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707833683] [2020-12-23 08:01:34,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:34,704 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:34,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [881584187] [2020-12-23 08:01:34,704 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:34,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 08:01:34,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:01:34,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 08:01:34,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:35,303 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:35,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707833683] [2020-12-23 08:01:35,304 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:35,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881584187] [2020-12-23 08:01:35,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:35,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-12-23 08:01:35,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62215456] [2020-12-23 08:01:35,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 08:01:35,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:35,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 08:01:35,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-12-23 08:01:35,306 INFO L87 Difference]: Start difference. First operand 112 states and 132 transitions. Second operand 24 states. [2020-12-23 08:01:35,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:35,770 INFO L93 Difference]: Finished difference Result 121 states and 142 transitions. [2020-12-23 08:01:35,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-23 08:01:35,770 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 111 [2020-12-23 08:01:35,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:35,772 INFO L225 Difference]: With dead ends: 121 [2020-12-23 08:01:35,772 INFO L226 Difference]: Without dead ends: 117 [2020-12-23 08:01:35,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=715, Invalid=1177, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 08:01:35,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-23 08:01:35,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2020-12-23 08:01:35,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-23 08:01:35,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 138 transitions. [2020-12-23 08:01:35,782 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 138 transitions. Word has length 111 [2020-12-23 08:01:35,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:35,783 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 138 transitions. [2020-12-23 08:01:35,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 08:01:35,783 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 138 transitions. [2020-12-23 08:01:35,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-23 08:01:35,784 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:35,784 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:35,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 08:01:36,000 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:36,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:36,000 INFO L82 PathProgramCache]: Analyzing trace with hash -163561255, now seen corresponding path program 21 times [2020-12-23 08:01:36,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:36,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794664171] [2020-12-23 08:01:36,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:36,012 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:36,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [38981335] [2020-12-23 08:01:36,012 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:36,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-12-23 08:01:36,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:01:36,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-23 08:01:36,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:36,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 0 proven. 1092 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:36,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794664171] [2020-12-23 08:01:36,664 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:36,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38981335] [2020-12-23 08:01:36,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:36,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-12-23 08:01:36,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991846523] [2020-12-23 08:01:36,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 08:01:36,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:36,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 08:01:36,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-12-23 08:01:36,666 INFO L87 Difference]: Start difference. First operand 117 states and 138 transitions. Second operand 25 states. [2020-12-23 08:01:37,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:37,116 INFO L93 Difference]: Finished difference Result 126 states and 148 transitions. [2020-12-23 08:01:37,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-23 08:01:37,117 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 116 [2020-12-23 08:01:37,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:37,118 INFO L225 Difference]: With dead ends: 126 [2020-12-23 08:01:37,118 INFO L226 Difference]: Without dead ends: 122 [2020-12-23 08:01:37,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=782, Invalid=1288, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 08:01:37,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-23 08:01:37,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2020-12-23 08:01:37,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-12-23 08:01:37,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 144 transitions. [2020-12-23 08:01:37,129 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 144 transitions. Word has length 116 [2020-12-23 08:01:37,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:37,129 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 144 transitions. [2020-12-23 08:01:37,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 08:01:37,130 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 144 transitions. [2020-12-23 08:01:37,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-23 08:01:37,130 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:37,131 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:37,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:37,345 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:37,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:37,345 INFO L82 PathProgramCache]: Analyzing trace with hash 433108203, now seen corresponding path program 22 times [2020-12-23 08:01:37,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:37,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765037177] [2020-12-23 08:01:37,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:37,355 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:37,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [564998512] [2020-12-23 08:01:37,356 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:37,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 08:01:37,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:01:37,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-23 08:01:37,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:37,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:37,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765037177] [2020-12-23 08:01:37,974 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:37,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564998512] [2020-12-23 08:01:37,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:37,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-12-23 08:01:37,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644478153] [2020-12-23 08:01:37,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 08:01:37,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:37,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 08:01:37,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-12-23 08:01:37,977 INFO L87 Difference]: Start difference. First operand 122 states and 144 transitions. Second operand 26 states. [2020-12-23 08:01:38,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:38,533 INFO L93 Difference]: Finished difference Result 131 states and 154 transitions. [2020-12-23 08:01:38,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-23 08:01:38,533 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 121 [2020-12-23 08:01:38,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:38,534 INFO L225 Difference]: With dead ends: 131 [2020-12-23 08:01:38,534 INFO L226 Difference]: Without dead ends: 127 [2020-12-23 08:01:38,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=852, Invalid=1404, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 08:01:38,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-12-23 08:01:38,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2020-12-23 08:01:38,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-23 08:01:38,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 150 transitions. [2020-12-23 08:01:38,545 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 150 transitions. Word has length 121 [2020-12-23 08:01:38,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:38,545 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 150 transitions. [2020-12-23 08:01:38,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 08:01:38,545 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 150 transitions. [2020-12-23 08:01:38,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-12-23 08:01:38,546 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:38,546 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:38,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 08:01:38,758 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:38,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:38,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1054868455, now seen corresponding path program 23 times [2020-12-23 08:01:38,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:38,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103227560] [2020-12-23 08:01:38,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:38,769 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:38,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [89136871] [2020-12-23 08:01:38,769 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:38,935 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-12-23 08:01:38,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:01:38,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-23 08:01:38,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:39,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 1311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:39,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103227560] [2020-12-23 08:01:39,441 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:39,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89136871] [2020-12-23 08:01:39,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:39,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-12-23 08:01:39,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201703261] [2020-12-23 08:01:39,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 08:01:39,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:39,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 08:01:39,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-12-23 08:01:39,443 INFO L87 Difference]: Start difference. First operand 127 states and 150 transitions. Second operand 27 states. [2020-12-23 08:01:39,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:39,950 INFO L93 Difference]: Finished difference Result 136 states and 160 transitions. [2020-12-23 08:01:39,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-23 08:01:39,951 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 126 [2020-12-23 08:01:39,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:39,952 INFO L225 Difference]: With dead ends: 136 [2020-12-23 08:01:39,953 INFO L226 Difference]: Without dead ends: 132 [2020-12-23 08:01:39,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=925, Invalid=1525, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 08:01:39,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-12-23 08:01:39,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2020-12-23 08:01:39,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-23 08:01:39,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 156 transitions. [2020-12-23 08:01:39,963 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 156 transitions. Word has length 126 [2020-12-23 08:01:39,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:39,964 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 156 transitions. [2020-12-23 08:01:39,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 08:01:39,964 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 156 transitions. [2020-12-23 08:01:39,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-23 08:01:39,965 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:39,965 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:40,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 08:01:40,179 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:40,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:40,180 INFO L82 PathProgramCache]: Analyzing trace with hash -909901397, now seen corresponding path program 24 times [2020-12-23 08:01:40,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:40,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455128358] [2020-12-23 08:01:40,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:40,194 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:40,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1507845602] [2020-12-23 08:01:40,195 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:40,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-23 08:01:40,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:01:40,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-23 08:01:40,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:40,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:40,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455128358] [2020-12-23 08:01:40,963 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:40,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507845602] [2020-12-23 08:01:40,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:40,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-12-23 08:01:40,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980150955] [2020-12-23 08:01:40,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 08:01:40,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:40,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 08:01:40,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-12-23 08:01:40,966 INFO L87 Difference]: Start difference. First operand 132 states and 156 transitions. Second operand 28 states. [2020-12-23 08:01:41,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:41,529 INFO L93 Difference]: Finished difference Result 141 states and 166 transitions. [2020-12-23 08:01:41,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-23 08:01:41,530 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 131 [2020-12-23 08:01:41,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:41,531 INFO L225 Difference]: With dead ends: 141 [2020-12-23 08:01:41,531 INFO L226 Difference]: Without dead ends: 137 [2020-12-23 08:01:41,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1001, Invalid=1651, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 08:01:41,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-12-23 08:01:41,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2020-12-23 08:01:41,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-23 08:01:41,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 162 transitions. [2020-12-23 08:01:41,544 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 162 transitions. Word has length 131 [2020-12-23 08:01:41,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:41,544 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 162 transitions. [2020-12-23 08:01:41,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 08:01:41,544 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 162 transitions. [2020-12-23 08:01:41,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-23 08:01:41,545 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:41,545 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:41,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 08:01:41,760 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:41,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:41,761 INFO L82 PathProgramCache]: Analyzing trace with hash 150906713, now seen corresponding path program 25 times [2020-12-23 08:01:41,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:41,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993803634] [2020-12-23 08:01:41,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:41,771 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:41,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [350091554] [2020-12-23 08:01:41,771 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:41,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:01:41,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-23 08:01:41,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:42,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 1550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:42,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993803634] [2020-12-23 08:01:42,486 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:42,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350091554] [2020-12-23 08:01:42,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:42,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-12-23 08:01:42,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315974802] [2020-12-23 08:01:42,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 08:01:42,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:42,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 08:01:42,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-12-23 08:01:42,496 INFO L87 Difference]: Start difference. First operand 137 states and 162 transitions. Second operand 29 states. [2020-12-23 08:01:43,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:43,137 INFO L93 Difference]: Finished difference Result 146 states and 172 transitions. [2020-12-23 08:01:43,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-23 08:01:43,137 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 136 [2020-12-23 08:01:43,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:43,138 INFO L225 Difference]: With dead ends: 146 [2020-12-23 08:01:43,138 INFO L226 Difference]: Without dead ends: 142 [2020-12-23 08:01:43,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1080, Invalid=1782, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 08:01:43,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-12-23 08:01:43,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2020-12-23 08:01:43,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-12-23 08:01:43,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 168 transitions. [2020-12-23 08:01:43,152 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 168 transitions. Word has length 136 [2020-12-23 08:01:43,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:43,153 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 168 transitions. [2020-12-23 08:01:43,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 08:01:43,153 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 168 transitions. [2020-12-23 08:01:43,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-12-23 08:01:43,153 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:43,154 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:43,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 08:01:43,370 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:43,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:43,370 INFO L82 PathProgramCache]: Analyzing trace with hash -158441877, now seen corresponding path program 26 times [2020-12-23 08:01:43,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:43,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624584617] [2020-12-23 08:01:43,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:43,379 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:43,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [874482612] [2020-12-23 08:01:43,380 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:43,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 08:01:43,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:01:43,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-23 08:01:43,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:44,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1677 backedges. 0 proven. 1677 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:44,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624584617] [2020-12-23 08:01:44,211 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:44,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874482612] [2020-12-23 08:01:44,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:44,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-12-23 08:01:44,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617910854] [2020-12-23 08:01:44,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 08:01:44,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:44,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 08:01:44,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-12-23 08:01:44,213 INFO L87 Difference]: Start difference. First operand 142 states and 168 transitions. Second operand 30 states. [2020-12-23 08:01:44,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:44,936 INFO L93 Difference]: Finished difference Result 151 states and 178 transitions. [2020-12-23 08:01:44,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-23 08:01:44,937 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 141 [2020-12-23 08:01:44,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:44,939 INFO L225 Difference]: With dead ends: 151 [2020-12-23 08:01:44,939 INFO L226 Difference]: Without dead ends: 147 [2020-12-23 08:01:44,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1162, Invalid=1918, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 08:01:44,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-12-23 08:01:44,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2020-12-23 08:01:44,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-12-23 08:01:44,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 174 transitions. [2020-12-23 08:01:44,950 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 174 transitions. Word has length 141 [2020-12-23 08:01:44,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:44,951 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 174 transitions. [2020-12-23 08:01:44,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 08:01:44,951 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 174 transitions. [2020-12-23 08:01:44,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-12-23 08:01:44,952 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:44,952 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:45,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:45,166 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:45,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:45,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1880079719, now seen corresponding path program 27 times [2020-12-23 08:01:45,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:45,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68780451] [2020-12-23 08:01:45,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:45,176 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:45,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1311587699] [2020-12-23 08:01:45,176 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:45,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2020-12-23 08:01:45,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:01:45,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-23 08:01:45,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:46,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 0 proven. 1809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:46,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68780451] [2020-12-23 08:01:46,169 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:46,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311587699] [2020-12-23 08:01:46,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:46,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-12-23 08:01:46,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499022419] [2020-12-23 08:01:46,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 08:01:46,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:46,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 08:01:46,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-12-23 08:01:46,170 INFO L87 Difference]: Start difference. First operand 147 states and 174 transitions. Second operand 31 states. [2020-12-23 08:01:46,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:46,929 INFO L93 Difference]: Finished difference Result 156 states and 184 transitions. [2020-12-23 08:01:46,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-23 08:01:46,929 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 146 [2020-12-23 08:01:46,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:46,931 INFO L225 Difference]: With dead ends: 156 [2020-12-23 08:01:46,932 INFO L226 Difference]: Without dead ends: 152 [2020-12-23 08:01:46,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1247, Invalid=2059, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 08:01:46,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-12-23 08:01:46,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2020-12-23 08:01:46,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-12-23 08:01:46,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 180 transitions. [2020-12-23 08:01:46,944 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 180 transitions. Word has length 146 [2020-12-23 08:01:46,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:46,944 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 180 transitions. [2020-12-23 08:01:46,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 08:01:46,945 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 180 transitions. [2020-12-23 08:01:46,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-12-23 08:01:46,946 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:46,946 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:47,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:47,161 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:47,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:47,161 INFO L82 PathProgramCache]: Analyzing trace with hash 177982251, now seen corresponding path program 28 times [2020-12-23 08:01:47,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:47,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348284191] [2020-12-23 08:01:47,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:47,170 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:47,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1449628216] [2020-12-23 08:01:47,170 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:47,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 08:01:47,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:01:47,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-23 08:01:47,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:48,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 1946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:48,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348284191] [2020-12-23 08:01:48,018 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:48,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449628216] [2020-12-23 08:01:48,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:48,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-12-23 08:01:48,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377825850] [2020-12-23 08:01:48,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 08:01:48,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:48,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 08:01:48,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-12-23 08:01:48,020 INFO L87 Difference]: Start difference. First operand 152 states and 180 transitions. Second operand 32 states. [2020-12-23 08:01:48,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:48,866 INFO L93 Difference]: Finished difference Result 161 states and 190 transitions. [2020-12-23 08:01:48,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-12-23 08:01:48,867 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 151 [2020-12-23 08:01:48,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:48,868 INFO L225 Difference]: With dead ends: 161 [2020-12-23 08:01:48,869 INFO L226 Difference]: Without dead ends: 157 [2020-12-23 08:01:48,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1335, Invalid=2205, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 08:01:48,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-12-23 08:01:48,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2020-12-23 08:01:48,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-23 08:01:48,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 186 transitions. [2020-12-23 08:01:48,881 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 186 transitions. Word has length 151 [2020-12-23 08:01:48,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:48,882 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 186 transitions. [2020-12-23 08:01:48,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 08:01:48,882 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 186 transitions. [2020-12-23 08:01:48,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-12-23 08:01:48,883 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:48,883 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:49,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:49,099 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:49,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:49,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1895248423, now seen corresponding path program 29 times [2020-12-23 08:01:49,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:49,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488573656] [2020-12-23 08:01:49,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:49,115 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:49,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [35608789] [2020-12-23 08:01:49,115 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:49,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2020-12-23 08:01:49,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:01:49,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 61 conjunts are in the unsatisfiable core [2020-12-23 08:01:49,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:50,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 2088 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:50,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488573656] [2020-12-23 08:01:50,119 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:50,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35608789] [2020-12-23 08:01:50,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:50,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-12-23 08:01:50,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857626573] [2020-12-23 08:01:50,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 08:01:50,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:50,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 08:01:50,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 08:01:50,121 INFO L87 Difference]: Start difference. First operand 157 states and 186 transitions. Second operand 33 states. [2020-12-23 08:01:51,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:51,002 INFO L93 Difference]: Finished difference Result 166 states and 196 transitions. [2020-12-23 08:01:51,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-23 08:01:51,003 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 156 [2020-12-23 08:01:51,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:51,005 INFO L225 Difference]: With dead ends: 166 [2020-12-23 08:01:51,005 INFO L226 Difference]: Without dead ends: 162 [2020-12-23 08:01:51,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1426, Invalid=2356, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 08:01:51,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-12-23 08:01:51,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2020-12-23 08:01:51,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-12-23 08:01:51,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 192 transitions. [2020-12-23 08:01:51,019 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 192 transitions. Word has length 156 [2020-12-23 08:01:51,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:51,019 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 192 transitions. [2020-12-23 08:01:51,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 08:01:51,019 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 192 transitions. [2020-12-23 08:01:51,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-12-23 08:01:51,020 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:51,020 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:51,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-23 08:01:51,228 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:51,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:51,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1498957803, now seen corresponding path program 30 times [2020-12-23 08:01:51,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:51,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339705736] [2020-12-23 08:01:51,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:51,237 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:51,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1050138646] [2020-12-23 08:01:51,238 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:51,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-12-23 08:01:51,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:01:51,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-23 08:01:51,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:52,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 0 proven. 2235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:52,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339705736] [2020-12-23 08:01:52,315 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:52,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050138646] [2020-12-23 08:01:52,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:52,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-12-23 08:01:52,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424065857] [2020-12-23 08:01:52,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 08:01:52,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:52,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 08:01:52,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 08:01:52,317 INFO L87 Difference]: Start difference. First operand 162 states and 192 transitions. Second operand 34 states. [2020-12-23 08:01:53,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:53,285 INFO L93 Difference]: Finished difference Result 171 states and 202 transitions. [2020-12-23 08:01:53,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-12-23 08:01:53,286 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 161 [2020-12-23 08:01:53,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:53,288 INFO L225 Difference]: With dead ends: 171 [2020-12-23 08:01:53,288 INFO L226 Difference]: Without dead ends: 167 [2020-12-23 08:01:53,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1520, Invalid=2512, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 08:01:53,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-12-23 08:01:53,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2020-12-23 08:01:53,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-12-23 08:01:53,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 198 transitions. [2020-12-23 08:01:53,301 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 198 transitions. Word has length 161 [2020-12-23 08:01:53,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:53,302 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 198 transitions. [2020-12-23 08:01:53,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 08:01:53,302 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 198 transitions. [2020-12-23 08:01:53,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-23 08:01:53,303 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:53,303 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:53,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:53,518 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:53,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:53,519 INFO L82 PathProgramCache]: Analyzing trace with hash -161724135, now seen corresponding path program 31 times [2020-12-23 08:01:53,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:53,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497506949] [2020-12-23 08:01:53,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:53,527 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:53,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1927936276] [2020-12-23 08:01:53,528 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:53,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:01:53,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-23 08:01:53,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:54,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2387 backedges. 0 proven. 2387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:54,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497506949] [2020-12-23 08:01:54,640 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:54,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927936276] [2020-12-23 08:01:54,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:54,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-12-23 08:01:54,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964087679] [2020-12-23 08:01:54,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 08:01:54,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:54,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 08:01:54,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 08:01:54,642 INFO L87 Difference]: Start difference. First operand 167 states and 198 transitions. Second operand 35 states. [2020-12-23 08:01:55,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:55,662 INFO L93 Difference]: Finished difference Result 176 states and 208 transitions. [2020-12-23 08:01:55,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-23 08:01:55,662 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 166 [2020-12-23 08:01:55,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:55,665 INFO L225 Difference]: With dead ends: 176 [2020-12-23 08:01:55,665 INFO L226 Difference]: Without dead ends: 172 [2020-12-23 08:01:55,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1617, Invalid=2673, Unknown=0, NotChecked=0, Total=4290 [2020-12-23 08:01:55,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-12-23 08:01:55,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2020-12-23 08:01:55,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-12-23 08:01:55,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 204 transitions. [2020-12-23 08:01:55,678 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 204 transitions. Word has length 166 [2020-12-23 08:01:55,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:55,678 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 204 transitions. [2020-12-23 08:01:55,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 08:01:55,678 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 204 transitions. [2020-12-23 08:01:55,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-12-23 08:01:55,679 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:55,679 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:55,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 08:01:55,891 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:55,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:55,891 INFO L82 PathProgramCache]: Analyzing trace with hash -550513493, now seen corresponding path program 32 times [2020-12-23 08:01:55,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:55,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857601542] [2020-12-23 08:01:55,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:55,904 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:55,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [130307623] [2020-12-23 08:01:55,904 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:56,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 08:01:56,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:01:56,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-23 08:01:56,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:57,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2544 backedges. 0 proven. 2544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:57,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857601542] [2020-12-23 08:01:57,094 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:57,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130307623] [2020-12-23 08:01:57,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:57,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-12-23 08:01:57,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807035231] [2020-12-23 08:01:57,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 08:01:57,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:57,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 08:01:57,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 08:01:57,097 INFO L87 Difference]: Start difference. First operand 172 states and 204 transitions. Second operand 36 states. [2020-12-23 08:01:58,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:58,062 INFO L93 Difference]: Finished difference Result 181 states and 214 transitions. [2020-12-23 08:01:58,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-23 08:01:58,062 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 171 [2020-12-23 08:01:58,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:58,065 INFO L225 Difference]: With dead ends: 181 [2020-12-23 08:01:58,065 INFO L226 Difference]: Without dead ends: 177 [2020-12-23 08:01:58,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1717, Invalid=2839, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 08:01:58,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-12-23 08:01:58,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2020-12-23 08:01:58,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-23 08:01:58,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 210 transitions. [2020-12-23 08:01:58,076 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 210 transitions. Word has length 171 [2020-12-23 08:01:58,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:58,077 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 210 transitions. [2020-12-23 08:01:58,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 08:01:58,077 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 210 transitions. [2020-12-23 08:01:58,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-12-23 08:01:58,078 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:58,078 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:58,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:58,291 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:58,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:58,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1392593831, now seen corresponding path program 33 times [2020-12-23 08:01:58,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:58,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244829439] [2020-12-23 08:01:58,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:58,301 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:58,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [677815696] [2020-12-23 08:01:58,301 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:58,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2020-12-23 08:01:58,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:01:58,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 69 conjunts are in the unsatisfiable core [2020-12-23 08:01:58,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:59,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 0 proven. 2706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:59,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244829439] [2020-12-23 08:01:59,731 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:59,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677815696] [2020-12-23 08:01:59,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:59,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-12-23 08:01:59,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263403797] [2020-12-23 08:01:59,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 08:01:59,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:59,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 08:01:59,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 08:01:59,733 INFO L87 Difference]: Start difference. First operand 177 states and 210 transitions. Second operand 37 states. [2020-12-23 08:02:00,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:02:00,762 INFO L93 Difference]: Finished difference Result 186 states and 220 transitions. [2020-12-23 08:02:00,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-12-23 08:02:00,763 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 176 [2020-12-23 08:02:00,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:02:00,764 INFO L225 Difference]: With dead ends: 186 [2020-12-23 08:02:00,764 INFO L226 Difference]: Without dead ends: 182 [2020-12-23 08:02:00,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1820, Invalid=3010, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 08:02:00,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-12-23 08:02:00,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2020-12-23 08:02:00,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-12-23 08:02:00,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 216 transitions. [2020-12-23 08:02:00,777 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 216 transitions. Word has length 176 [2020-12-23 08:02:00,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:02:00,778 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 216 transitions. [2020-12-23 08:02:00,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 08:02:00,778 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 216 transitions. [2020-12-23 08:02:00,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-12-23 08:02:00,779 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:02:00,779 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:02:00,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 08:02:00,995 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:02:00,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:02:00,995 INFO L82 PathProgramCache]: Analyzing trace with hash 26112363, now seen corresponding path program 34 times [2020-12-23 08:02:00,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:02:00,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729130439] [2020-12-23 08:02:00,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:02:01,004 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:02:01,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [212074429] [2020-12-23 08:02:01,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:02:01,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 08:02:01,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:02:01,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 715 conjuncts, 71 conjunts are in the unsatisfiable core [2020-12-23 08:02:01,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:02:02,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2873 backedges. 0 proven. 2873 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:02:02,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729130439] [2020-12-23 08:02:02,292 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:02:02,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212074429] [2020-12-23 08:02:02,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:02:02,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-12-23 08:02:02,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229061324] [2020-12-23 08:02:02,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-23 08:02:02,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:02:02,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-23 08:02:02,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 08:02:02,294 INFO L87 Difference]: Start difference. First operand 182 states and 216 transitions. Second operand 38 states. [2020-12-23 08:02:03,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:02:03,443 INFO L93 Difference]: Finished difference Result 191 states and 226 transitions. [2020-12-23 08:02:03,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-12-23 08:02:03,443 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 181 [2020-12-23 08:02:03,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:02:03,446 INFO L225 Difference]: With dead ends: 191 [2020-12-23 08:02:03,446 INFO L226 Difference]: Without dead ends: 187 [2020-12-23 08:02:03,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1926, Invalid=3186, Unknown=0, NotChecked=0, Total=5112 [2020-12-23 08:02:03,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-12-23 08:02:03,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2020-12-23 08:02:03,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-12-23 08:02:03,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 222 transitions. [2020-12-23 08:02:03,461 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 222 transitions. Word has length 181 [2020-12-23 08:02:03,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:02:03,461 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 222 transitions. [2020-12-23 08:02:03,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-23 08:02:03,461 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 222 transitions. [2020-12-23 08:02:03,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-12-23 08:02:03,462 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:02:03,463 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:02:03,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 08:02:03,677 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:02:03,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:02:03,678 INFO L82 PathProgramCache]: Analyzing trace with hash -788263015, now seen corresponding path program 35 times [2020-12-23 08:02:03,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:02:03,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640674552] [2020-12-23 08:02:03,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:02:03,687 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:02:03,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1571083490] [2020-12-23 08:02:03,688 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:02:03,922 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2020-12-23 08:02:03,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:02:03,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 73 conjunts are in the unsatisfiable core [2020-12-23 08:02:03,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:02:05,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 0 proven. 3045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:02:05,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640674552] [2020-12-23 08:02:05,086 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:02:05,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571083490] [2020-12-23 08:02:05,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:02:05,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-12-23 08:02:05,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480562033] [2020-12-23 08:02:05,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 08:02:05,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:02:05,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 08:02:05,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 08:02:05,087 INFO L87 Difference]: Start difference. First operand 187 states and 222 transitions. Second operand 39 states. [2020-12-23 08:02:06,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:02:06,284 INFO L93 Difference]: Finished difference Result 196 states and 232 transitions. [2020-12-23 08:02:06,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-12-23 08:02:06,285 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 186 [2020-12-23 08:02:06,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:02:06,286 INFO L225 Difference]: With dead ends: 196 [2020-12-23 08:02:06,286 INFO L226 Difference]: Without dead ends: 192 [2020-12-23 08:02:06,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2035, Invalid=3367, Unknown=0, NotChecked=0, Total=5402 [2020-12-23 08:02:06,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-12-23 08:02:06,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2020-12-23 08:02:06,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-12-23 08:02:06,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 228 transitions. [2020-12-23 08:02:06,299 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 228 transitions. Word has length 186 [2020-12-23 08:02:06,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:02:06,300 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 228 transitions. [2020-12-23 08:02:06,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 08:02:06,300 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 228 transitions. [2020-12-23 08:02:06,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-12-23 08:02:06,301 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:02:06,301 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:02:06,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 08:02:06,515 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:02:06,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:02:06,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1323310635, now seen corresponding path program 36 times [2020-12-23 08:02:06,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:02:06,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173167613] [2020-12-23 08:02:06,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:02:06,524 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:02:06,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [137411449] [2020-12-23 08:02:06,525 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:02:06,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2020-12-23 08:02:06,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:02:06,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 75 conjunts are in the unsatisfiable core [2020-12-23 08:02:06,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:02:08,080 INFO L134 CoverageAnalysis]: Checked inductivity of 3222 backedges. 0 proven. 3222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:02:08,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173167613] [2020-12-23 08:02:08,081 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:02:08,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137411449] [2020-12-23 08:02:08,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:02:08,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-12-23 08:02:08,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851963203] [2020-12-23 08:02:08,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 08:02:08,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:02:08,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 08:02:08,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 08:02:08,082 INFO L87 Difference]: Start difference. First operand 192 states and 228 transitions. Second operand 40 states. [2020-12-23 08:02:09,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:02:09,385 INFO L93 Difference]: Finished difference Result 201 states and 238 transitions. [2020-12-23 08:02:09,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-12-23 08:02:09,386 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 191 [2020-12-23 08:02:09,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:02:09,388 INFO L225 Difference]: With dead ends: 201 [2020-12-23 08:02:09,388 INFO L226 Difference]: Without dead ends: 197 [2020-12-23 08:02:09,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2147, Invalid=3553, Unknown=0, NotChecked=0, Total=5700 [2020-12-23 08:02:09,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-12-23 08:02:09,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2020-12-23 08:02:09,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-12-23 08:02:09,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 234 transitions. [2020-12-23 08:02:09,399 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 234 transitions. Word has length 191 [2020-12-23 08:02:09,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:02:09,400 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 234 transitions. [2020-12-23 08:02:09,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 08:02:09,400 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 234 transitions. [2020-12-23 08:02:09,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-12-23 08:02:09,401 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:02:09,401 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:02:09,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 08:02:09,616 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:02:09,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:02:09,616 INFO L82 PathProgramCache]: Analyzing trace with hash -142583079, now seen corresponding path program 37 times [2020-12-23 08:02:09,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:02:09,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262715127] [2020-12-23 08:02:09,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:02:09,626 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:02:09,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [854101882] [2020-12-23 08:02:09,627 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:02:09,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:02:09,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 772 conjuncts, 77 conjunts are in the unsatisfiable core [2020-12-23 08:02:09,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:02:11,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:02:11,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262715127] [2020-12-23 08:02:11,141 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:02:11,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854101882] [2020-12-23 08:02:11,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:02:11,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-12-23 08:02:11,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562830520] [2020-12-23 08:02:11,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 08:02:11,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:02:11,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 08:02:11,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 08:02:11,143 INFO L87 Difference]: Start difference. First operand 197 states and 234 transitions. Second operand 41 states. [2020-12-23 08:02:12,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:02:12,524 INFO L93 Difference]: Finished difference Result 206 states and 244 transitions. [2020-12-23 08:02:12,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-12-23 08:02:12,525 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 196 [2020-12-23 08:02:12,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:02:12,526 INFO L225 Difference]: With dead ends: 206 [2020-12-23 08:02:12,527 INFO L226 Difference]: Without dead ends: 202 [2020-12-23 08:02:12,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2262, Invalid=3744, Unknown=0, NotChecked=0, Total=6006 [2020-12-23 08:02:12,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-12-23 08:02:12,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2020-12-23 08:02:12,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-12-23 08:02:12,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 240 transitions. [2020-12-23 08:02:12,540 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 240 transitions. Word has length 196 [2020-12-23 08:02:12,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:02:12,540 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 240 transitions. [2020-12-23 08:02:12,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 08:02:12,540 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 240 transitions. [2020-12-23 08:02:12,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-12-23 08:02:12,541 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:02:12,542 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:02:12,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:02:12,756 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:02:12,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:02:12,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1049680619, now seen corresponding path program 38 times [2020-12-23 08:02:12,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:02:12,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732454920] [2020-12-23 08:02:12,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:02:12,770 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:02:12,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [521117979] [2020-12-23 08:02:12,771 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:02:12,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 08:02:12,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:02:12,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 791 conjuncts, 79 conjunts are in the unsatisfiable core [2020-12-23 08:02:12,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:02:14,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3591 backedges. 0 proven. 3591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:02:14,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732454920] [2020-12-23 08:02:14,332 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:02:14,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521117979] [2020-12-23 08:02:14,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:02:14,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-12-23 08:02:14,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065329573] [2020-12-23 08:02:14,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-23 08:02:14,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:02:14,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-23 08:02:14,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 08:02:14,334 INFO L87 Difference]: Start difference. First operand 202 states and 240 transitions. Second operand 42 states. [2020-12-23 08:02:15,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:02:15,778 INFO L93 Difference]: Finished difference Result 211 states and 250 transitions. [2020-12-23 08:02:15,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-12-23 08:02:15,779 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 201 [2020-12-23 08:02:15,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:02:15,781 INFO L225 Difference]: With dead ends: 211 [2020-12-23 08:02:15,781 INFO L226 Difference]: Without dead ends: 207 [2020-12-23 08:02:15,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2380, Invalid=3940, Unknown=0, NotChecked=0, Total=6320 [2020-12-23 08:02:15,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-12-23 08:02:15,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2020-12-23 08:02:15,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-12-23 08:02:15,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 246 transitions. [2020-12-23 08:02:15,795 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 246 transitions. Word has length 201 [2020-12-23 08:02:15,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:02:15,795 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 246 transitions. [2020-12-23 08:02:15,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-23 08:02:15,796 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 246 transitions. [2020-12-23 08:02:15,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-12-23 08:02:15,797 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:02:15,797 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:02:16,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-12-23 08:02:16,012 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:02:16,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:02:16,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1820825113, now seen corresponding path program 39 times [2020-12-23 08:02:16,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:02:16,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908730956] [2020-12-23 08:02:16,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:02:16,026 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:02:16,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1653107567] [2020-12-23 08:02:16,026 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:02:16,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2020-12-23 08:02:16,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:02:16,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 81 conjunts are in the unsatisfiable core [2020-12-23 08:02:16,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:02:17,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3783 backedges. 0 proven. 3783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:02:17,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908730956] [2020-12-23 08:02:17,763 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:02:17,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653107567] [2020-12-23 08:02:17,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:02:17,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-12-23 08:02:17,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104328709] [2020-12-23 08:02:17,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 08:02:17,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:02:17,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 08:02:17,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 08:02:17,765 INFO L87 Difference]: Start difference. First operand 207 states and 246 transitions. Second operand 43 states. [2020-12-23 08:02:19,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:02:19,306 INFO L93 Difference]: Finished difference Result 216 states and 256 transitions. [2020-12-23 08:02:19,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-12-23 08:02:19,306 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 206 [2020-12-23 08:02:19,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:02:19,308 INFO L225 Difference]: With dead ends: 216 [2020-12-23 08:02:19,308 INFO L226 Difference]: Without dead ends: 212 [2020-12-23 08:02:19,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2501, Invalid=4141, Unknown=0, NotChecked=0, Total=6642 [2020-12-23 08:02:19,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-12-23 08:02:19,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2020-12-23 08:02:19,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-12-23 08:02:19,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 252 transitions. [2020-12-23 08:02:19,322 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 252 transitions. Word has length 206 [2020-12-23 08:02:19,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:02:19,323 INFO L481 AbstractCegarLoop]: Abstraction has 212 states and 252 transitions. [2020-12-23 08:02:19,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 08:02:19,323 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 252 transitions. [2020-12-23 08:02:19,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-12-23 08:02:19,324 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:02:19,324 INFO L422 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:02:19,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:02:19,538 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:02:19,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:02:19,538 INFO L82 PathProgramCache]: Analyzing trace with hash -250828885, now seen corresponding path program 40 times [2020-12-23 08:02:19,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:02:19,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461099574] [2020-12-23 08:02:19,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:02:19,548 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:02:19,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [476594656] [2020-12-23 08:02:19,548 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:02:19,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 08:02:19,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:02:19,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 83 conjunts are in the unsatisfiable core [2020-12-23 08:02:19,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:02:21,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 0 proven. 3980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:02:21,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461099574] [2020-12-23 08:02:21,218 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:02:21,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476594656] [2020-12-23 08:02:21,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:02:21,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-12-23 08:02:21,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51408268] [2020-12-23 08:02:21,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-23 08:02:21,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:02:21,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-23 08:02:21,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 08:02:21,219 INFO L87 Difference]: Start difference. First operand 212 states and 252 transitions. Second operand 44 states. [2020-12-23 08:02:22,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:02:22,799 INFO L93 Difference]: Finished difference Result 221 states and 262 transitions. [2020-12-23 08:02:22,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-12-23 08:02:22,800 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 211 [2020-12-23 08:02:22,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:02:22,801 INFO L225 Difference]: With dead ends: 221 [2020-12-23 08:02:22,801 INFO L226 Difference]: Without dead ends: 217 [2020-12-23 08:02:22,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2625, Invalid=4347, Unknown=0, NotChecked=0, Total=6972 [2020-12-23 08:02:22,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-12-23 08:02:22,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2020-12-23 08:02:22,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-12-23 08:02:22,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 258 transitions. [2020-12-23 08:02:22,814 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 258 transitions. Word has length 211 [2020-12-23 08:02:22,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:02:22,815 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 258 transitions. [2020-12-23 08:02:22,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-23 08:02:22,815 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 258 transitions. [2020-12-23 08:02:22,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-12-23 08:02:22,816 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:02:22,816 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:02:23,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:02:23,031 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:02:23,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:02:23,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1932378457, now seen corresponding path program 41 times [2020-12-23 08:02:23,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:02:23,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403618480] [2020-12-23 08:02:23,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:02:23,040 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:02:23,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1410927612] [2020-12-23 08:02:23,041 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:02:23,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2020-12-23 08:02:23,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:02:23,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 85 conjunts are in the unsatisfiable core [2020-12-23 08:02:23,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:02:24,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4182 backedges. 0 proven. 4182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:02:24,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403618480] [2020-12-23 08:02:24,761 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:02:24,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410927612] [2020-12-23 08:02:24,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:02:24,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-12-23 08:02:24,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608070846] [2020-12-23 08:02:24,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-23 08:02:24,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:02:24,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-23 08:02:24,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 08:02:24,763 INFO L87 Difference]: Start difference. First operand 217 states and 258 transitions. Second operand 45 states. [2020-12-23 08:02:26,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:02:26,418 INFO L93 Difference]: Finished difference Result 226 states and 268 transitions. [2020-12-23 08:02:26,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-12-23 08:02:26,419 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 216 [2020-12-23 08:02:26,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:02:26,421 INFO L225 Difference]: With dead ends: 226 [2020-12-23 08:02:26,421 INFO L226 Difference]: Without dead ends: 222 [2020-12-23 08:02:26,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2752, Invalid=4558, Unknown=0, NotChecked=0, Total=7310 [2020-12-23 08:02:26,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-12-23 08:02:26,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2020-12-23 08:02:26,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-12-23 08:02:26,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 264 transitions. [2020-12-23 08:02:26,430 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 264 transitions. Word has length 216 [2020-12-23 08:02:26,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:02:26,431 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 264 transitions. [2020-12-23 08:02:26,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-23 08:02:26,431 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 264 transitions. [2020-12-23 08:02:26,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-12-23 08:02:26,432 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:02:26,432 INFO L422 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:02:26,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-23 08:02:26,646 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:02:26,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:02:26,646 INFO L82 PathProgramCache]: Analyzing trace with hash -272661397, now seen corresponding path program 42 times [2020-12-23 08:02:26,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:02:26,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860637628] [2020-12-23 08:02:26,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:02:26,655 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:02:26,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [475656146] [2020-12-23 08:02:26,655 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:02:27,038 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2020-12-23 08:02:27,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:02:27,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 867 conjuncts, 87 conjunts are in the unsatisfiable core [2020-12-23 08:02:27,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:02:28,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4389 backedges. 0 proven. 4389 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:02:28,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860637628] [2020-12-23 08:02:28,679 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:02:28,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475656146] [2020-12-23 08:02:28,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:02:28,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-12-23 08:02:28,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588154027] [2020-12-23 08:02:28,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-23 08:02:28,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:02:28,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-23 08:02:28,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 08:02:28,681 INFO L87 Difference]: Start difference. First operand 222 states and 264 transitions. Second operand 46 states. [2020-12-23 08:02:30,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:02:30,419 INFO L93 Difference]: Finished difference Result 231 states and 274 transitions. [2020-12-23 08:02:30,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-12-23 08:02:30,420 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 221 [2020-12-23 08:02:30,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:02:30,422 INFO L225 Difference]: With dead ends: 231 [2020-12-23 08:02:30,422 INFO L226 Difference]: Without dead ends: 227 [2020-12-23 08:02:30,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2882, Invalid=4774, Unknown=0, NotChecked=0, Total=7656 [2020-12-23 08:02:30,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-12-23 08:02:30,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2020-12-23 08:02:30,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-12-23 08:02:30,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 270 transitions. [2020-12-23 08:02:30,435 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 270 transitions. Word has length 221 [2020-12-23 08:02:30,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:02:30,436 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 270 transitions. [2020-12-23 08:02:30,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-23 08:02:30,436 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 270 transitions. [2020-12-23 08:02:30,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-12-23 08:02:30,437 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:02:30,437 INFO L422 BasicCegarLoop]: trace histogram [44, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:02:30,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-23 08:02:30,638 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:02:30,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:02:30,638 INFO L82 PathProgramCache]: Analyzing trace with hash -2054759271, now seen corresponding path program 43 times [2020-12-23 08:02:30,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:02:30,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926159552] [2020-12-23 08:02:30,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:02:30,647 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:02:30,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1031900642] [2020-12-23 08:02:30,648 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:02:30,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:02:30,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 886 conjuncts, 89 conjunts are in the unsatisfiable core [2020-12-23 08:02:30,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:02:32,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4601 backedges. 0 proven. 4601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:02:32,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926159552] [2020-12-23 08:02:32,582 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:02:32,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031900642] [2020-12-23 08:02:32,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:02:32,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-12-23 08:02:32,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726478742] [2020-12-23 08:02:32,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-23 08:02:32,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:02:32,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-23 08:02:32,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 08:02:32,584 INFO L87 Difference]: Start difference. First operand 227 states and 270 transitions. Second operand 47 states. [2020-12-23 08:02:34,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:02:34,419 INFO L93 Difference]: Finished difference Result 236 states and 280 transitions. [2020-12-23 08:02:34,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2020-12-23 08:02:34,420 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 226 [2020-12-23 08:02:34,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:02:34,422 INFO L225 Difference]: With dead ends: 236 [2020-12-23 08:02:34,422 INFO L226 Difference]: Without dead ends: 232 [2020-12-23 08:02:34,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3015, Invalid=4995, Unknown=0, NotChecked=0, Total=8010 [2020-12-23 08:02:34,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-12-23 08:02:34,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2020-12-23 08:02:34,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-12-23 08:02:34,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 276 transitions. [2020-12-23 08:02:34,436 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 276 transitions. Word has length 226 [2020-12-23 08:02:34,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:02:34,437 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 276 transitions. [2020-12-23 08:02:34,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-23 08:02:34,437 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 276 transitions. [2020-12-23 08:02:34,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-12-23 08:02:34,438 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:02:34,438 INFO L422 BasicCegarLoop]: trace histogram [45, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:02:34,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-23 08:02:34,652 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:02:34,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:02:34,652 INFO L82 PathProgramCache]: Analyzing trace with hash -317361877, now seen corresponding path program 44 times [2020-12-23 08:02:34,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:02:34,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595246315] [2020-12-23 08:02:34,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:02:34,661 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:02:34,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1837231394] [2020-12-23 08:02:34,661 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:02:34,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 08:02:34,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:02:34,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 91 conjunts are in the unsatisfiable core [2020-12-23 08:02:34,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:02:36,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4818 backedges. 0 proven. 4818 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:02:36,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595246315] [2020-12-23 08:02:36,516 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:02:36,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837231394] [2020-12-23 08:02:36,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:02:36,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-12-23 08:02:36,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509825297] [2020-12-23 08:02:36,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-23 08:02:36,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:02:36,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-23 08:02:36,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 08:02:36,518 INFO L87 Difference]: Start difference. First operand 232 states and 276 transitions. Second operand 48 states. [2020-12-23 08:02:38,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:02:38,407 INFO L93 Difference]: Finished difference Result 241 states and 286 transitions. [2020-12-23 08:02:38,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2020-12-23 08:02:38,408 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 231 [2020-12-23 08:02:38,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:02:38,410 INFO L225 Difference]: With dead ends: 241 [2020-12-23 08:02:38,410 INFO L226 Difference]: Without dead ends: 237 [2020-12-23 08:02:38,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3151, Invalid=5221, Unknown=0, NotChecked=0, Total=8372 [2020-12-23 08:02:38,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-12-23 08:02:38,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2020-12-23 08:02:38,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-12-23 08:02:38,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 282 transitions. [2020-12-23 08:02:38,424 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 282 transitions. Word has length 231 [2020-12-23 08:02:38,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:02:38,424 INFO L481 AbstractCegarLoop]: Abstraction has 237 states and 282 transitions. [2020-12-23 08:02:38,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-23 08:02:38,425 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 282 transitions. [2020-12-23 08:02:38,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-12-23 08:02:38,426 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:02:38,426 INFO L422 BasicCegarLoop]: trace histogram [46, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:02:38,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:02:38,634 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:02:38,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:02:38,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1801000999, now seen corresponding path program 45 times [2020-12-23 08:02:38,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:02:38,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524306857] [2020-12-23 08:02:38,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:02:38,644 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:02:38,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1694925927] [2020-12-23 08:02:38,645 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:02:39,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2020-12-23 08:02:39,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:02:39,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 924 conjuncts, 93 conjunts are in the unsatisfiable core [2020-12-23 08:02:39,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:02:40,879 INFO L134 CoverageAnalysis]: Checked inductivity of 5040 backedges. 0 proven. 5040 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:02:40,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524306857] [2020-12-23 08:02:40,879 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:02:40,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694925927] [2020-12-23 08:02:40,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:02:40,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-12-23 08:02:40,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294850673] [2020-12-23 08:02:40,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-23 08:02:40,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:02:40,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-23 08:02:40,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 08:02:40,882 INFO L87 Difference]: Start difference. First operand 237 states and 282 transitions. Second operand 49 states. [2020-12-23 08:02:42,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:02:42,904 INFO L93 Difference]: Finished difference Result 246 states and 292 transitions. [2020-12-23 08:02:42,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-12-23 08:02:42,904 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 236 [2020-12-23 08:02:42,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:02:42,909 INFO L225 Difference]: With dead ends: 246 [2020-12-23 08:02:42,909 INFO L226 Difference]: Without dead ends: 242 [2020-12-23 08:02:42,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3290, Invalid=5452, Unknown=0, NotChecked=0, Total=8742 [2020-12-23 08:02:42,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-12-23 08:02:42,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2020-12-23 08:02:42,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-12-23 08:02:42,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 288 transitions. [2020-12-23 08:02:42,924 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 288 transitions. Word has length 236 [2020-12-23 08:02:42,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:02:42,925 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 288 transitions. [2020-12-23 08:02:42,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-23 08:02:42,925 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 288 transitions. [2020-12-23 08:02:42,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-12-23 08:02:42,926 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:02:42,926 INFO L422 BasicCegarLoop]: trace histogram [47, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:02:43,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-23 08:02:43,141 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:02:43,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:02:43,142 INFO L82 PathProgramCache]: Analyzing trace with hash -2072351253, now seen corresponding path program 46 times [2020-12-23 08:02:43,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:02:43,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616826844] [2020-12-23 08:02:43,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:02:43,152 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:02:43,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [506023345] [2020-12-23 08:02:43,153 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:02:43,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 08:02:43,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:02:43,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 943 conjuncts, 95 conjunts are in the unsatisfiable core [2020-12-23 08:02:43,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:02:45,306 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:02:45,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616826844] [2020-12-23 08:02:45,307 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:02:45,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506023345] [2020-12-23 08:02:45,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:02:45,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-12-23 08:02:45,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740041867] [2020-12-23 08:02:45,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-23 08:02:45,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:02:45,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-23 08:02:45,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 08:02:45,309 INFO L87 Difference]: Start difference. First operand 242 states and 288 transitions. Second operand 50 states. [2020-12-23 08:02:47,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:02:47,417 INFO L93 Difference]: Finished difference Result 251 states and 298 transitions. [2020-12-23 08:02:47,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-12-23 08:02:47,417 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 241 [2020-12-23 08:02:47,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:02:47,419 INFO L225 Difference]: With dead ends: 251 [2020-12-23 08:02:47,419 INFO L226 Difference]: Without dead ends: 247 [2020-12-23 08:02:47,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3432, Invalid=5688, Unknown=0, NotChecked=0, Total=9120 [2020-12-23 08:02:47,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-12-23 08:02:47,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2020-12-23 08:02:47,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-12-23 08:02:47,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 294 transitions. [2020-12-23 08:02:47,433 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 294 transitions. Word has length 241 [2020-12-23 08:02:47,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:02:47,434 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 294 transitions. [2020-12-23 08:02:47,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-23 08:02:47,434 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 294 transitions. [2020-12-23 08:02:47,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-12-23 08:02:47,435 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:02:47,435 INFO L422 BasicCegarLoop]: trace histogram [48, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:02:47,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-23 08:02:47,650 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:02:47,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:02:47,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1218568985, now seen corresponding path program 47 times [2020-12-23 08:02:47,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:02:47,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227350598] [2020-12-23 08:02:47,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:02:47,661 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:02:47,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [368832907] [2020-12-23 08:02:47,662 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:02:47,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2020-12-23 08:02:47,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:02:48,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 962 conjuncts, 97 conjunts are in the unsatisfiable core [2020-12-23 08:02:48,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:02:50,030 INFO L134 CoverageAnalysis]: Checked inductivity of 5499 backedges. 0 proven. 5499 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:02:50,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227350598] [2020-12-23 08:02:50,030 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:02:50,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368832907] [2020-12-23 08:02:50,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:02:50,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-12-23 08:02:50,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112777366] [2020-12-23 08:02:50,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-23 08:02:50,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:02:50,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-23 08:02:50,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 08:02:50,032 INFO L87 Difference]: Start difference. First operand 247 states and 294 transitions. Second operand 51 states. [2020-12-23 08:02:52,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:02:52,324 INFO L93 Difference]: Finished difference Result 256 states and 304 transitions. [2020-12-23 08:02:52,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2020-12-23 08:02:52,324 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 246 [2020-12-23 08:02:52,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:02:52,327 INFO L225 Difference]: With dead ends: 256 [2020-12-23 08:02:52,327 INFO L226 Difference]: Without dead ends: 252 [2020-12-23 08:02:52,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3577, Invalid=5929, Unknown=0, NotChecked=0, Total=9506 [2020-12-23 08:02:52,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-12-23 08:02:52,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2020-12-23 08:02:52,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-12-23 08:02:52,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 300 transitions. [2020-12-23 08:02:52,340 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 300 transitions. Word has length 246 [2020-12-23 08:02:52,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:02:52,341 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 300 transitions. [2020-12-23 08:02:52,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-23 08:02:52,341 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 300 transitions. [2020-12-23 08:02:52,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-12-23 08:02:52,343 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:02:52,343 INFO L422 BasicCegarLoop]: trace histogram [49, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:02:52,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:02:52,558 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:02:52,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:02:52,558 INFO L82 PathProgramCache]: Analyzing trace with hash -94733653, now seen corresponding path program 48 times [2020-12-23 08:02:52,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:02:52,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132059159] [2020-12-23 08:02:52,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:02:52,569 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:02:52,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1148368063] [2020-12-23 08:02:52,569 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:02:53,036 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2020-12-23 08:02:53,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:02:53,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 981 conjuncts, 99 conjunts are in the unsatisfiable core [2020-12-23 08:02:53,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:02:55,143 INFO L134 CoverageAnalysis]: Checked inductivity of 5736 backedges. 0 proven. 5736 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:02:55,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132059159] [2020-12-23 08:02:55,143 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:02:55,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148368063] [2020-12-23 08:02:55,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:02:55,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-12-23 08:02:55,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196816047] [2020-12-23 08:02:55,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-23 08:02:55,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:02:55,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-23 08:02:55,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 08:02:55,145 INFO L87 Difference]: Start difference. First operand 252 states and 300 transitions. Second operand 52 states. [2020-12-23 08:02:57,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:02:57,490 INFO L93 Difference]: Finished difference Result 261 states and 310 transitions. [2020-12-23 08:02:57,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2020-12-23 08:02:57,491 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 251 [2020-12-23 08:02:57,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:02:57,493 INFO L225 Difference]: With dead ends: 261 [2020-12-23 08:02:57,493 INFO L226 Difference]: Without dead ends: 257 [2020-12-23 08:02:57,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3725, Invalid=6175, Unknown=0, NotChecked=0, Total=9900 [2020-12-23 08:02:57,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-12-23 08:02:57,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2020-12-23 08:02:57,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-12-23 08:02:57,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 306 transitions. [2020-12-23 08:02:57,508 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 306 transitions. Word has length 251 [2020-12-23 08:02:57,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:02:57,508 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 306 transitions. [2020-12-23 08:02:57,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-23 08:02:57,508 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 306 transitions. [2020-12-23 08:02:57,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-12-23 08:02:57,509 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:02:57,510 INFO L422 BasicCegarLoop]: trace histogram [50, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:02:57,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-12-23 08:02:57,724 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:02:57,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:02:57,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1082904153, now seen corresponding path program 49 times [2020-12-23 08:02:57,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:02:57,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971757928] [2020-12-23 08:02:57,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:02:57,733 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:02:57,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [458091304] [2020-12-23 08:02:57,733 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:02:57,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:02:57,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 1000 conjuncts, 101 conjunts are in the unsatisfiable core [2020-12-23 08:02:57,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:03:00,051 INFO L134 CoverageAnalysis]: Checked inductivity of 5978 backedges. 0 proven. 5978 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:03:00,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971757928] [2020-12-23 08:03:00,052 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:03:00,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458091304] [2020-12-23 08:03:00,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:03:00,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-12-23 08:03:00,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139809980] [2020-12-23 08:03:00,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-23 08:03:00,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:03:00,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-23 08:03:00,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 08:03:00,055 INFO L87 Difference]: Start difference. First operand 257 states and 306 transitions. Second operand 53 states. [2020-12-23 08:03:02,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:03:02,436 INFO L93 Difference]: Finished difference Result 266 states and 316 transitions. [2020-12-23 08:03:02,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2020-12-23 08:03:02,437 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 256 [2020-12-23 08:03:02,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:03:02,439 INFO L225 Difference]: With dead ends: 266 [2020-12-23 08:03:02,439 INFO L226 Difference]: Without dead ends: 262 [2020-12-23 08:03:02,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3876, Invalid=6426, Unknown=0, NotChecked=0, Total=10302 [2020-12-23 08:03:02,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-12-23 08:03:02,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2020-12-23 08:03:02,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-12-23 08:03:02,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 312 transitions. [2020-12-23 08:03:02,449 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 312 transitions. Word has length 256 [2020-12-23 08:03:02,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:03:02,450 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 312 transitions. [2020-12-23 08:03:02,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-23 08:03:02,450 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 312 transitions. [2020-12-23 08:03:02,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-12-23 08:03:02,452 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:03:02,452 INFO L422 BasicCegarLoop]: trace histogram [51, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:03:02,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:03:02,653 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:03:02,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:03:02,653 INFO L82 PathProgramCache]: Analyzing trace with hash -64907413, now seen corresponding path program 50 times [2020-12-23 08:03:02,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:03:02,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310715688] [2020-12-23 08:03:02,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:03:02,662 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:03:02,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1549381336] [2020-12-23 08:03:02,662 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:03:02,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 08:03:02,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:03:02,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 1019 conjuncts, 103 conjunts are in the unsatisfiable core [2020-12-23 08:03:02,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:03:05,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6225 backedges. 0 proven. 6225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:03:05,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310715688] [2020-12-23 08:03:05,235 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:03:05,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549381336] [2020-12-23 08:03:05,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:03:05,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-12-23 08:03:05,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099529224] [2020-12-23 08:03:05,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-23 08:03:05,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:03:05,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-23 08:03:05,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 08:03:05,238 INFO L87 Difference]: Start difference. First operand 262 states and 312 transitions. Second operand 54 states. [2020-12-23 08:03:07,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:03:07,748 INFO L93 Difference]: Finished difference Result 271 states and 322 transitions. [2020-12-23 08:03:07,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2020-12-23 08:03:07,749 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 261 [2020-12-23 08:03:07,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:03:07,750 INFO L225 Difference]: With dead ends: 271 [2020-12-23 08:03:07,750 INFO L226 Difference]: Without dead ends: 267 [2020-12-23 08:03:07,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4030, Invalid=6682, Unknown=0, NotChecked=0, Total=10712 [2020-12-23 08:03:07,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-12-23 08:03:07,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2020-12-23 08:03:07,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-12-23 08:03:07,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 318 transitions. [2020-12-23 08:03:07,765 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 318 transitions. Word has length 261 [2020-12-23 08:03:07,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:03:07,765 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 318 transitions. [2020-12-23 08:03:07,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-23 08:03:07,765 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 318 transitions. [2020-12-23 08:03:07,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2020-12-23 08:03:07,767 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:03:07,767 INFO L422 BasicCegarLoop]: trace histogram [52, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:03:07,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-12-23 08:03:07,982 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:03:07,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:03:07,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1383639449, now seen corresponding path program 51 times [2020-12-23 08:03:07,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:03:07,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537426788] [2020-12-23 08:03:07,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:03:07,991 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:03:07,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1615009803] [2020-12-23 08:03:07,991 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:03:08,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2020-12-23 08:03:08,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:03:08,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 105 conjunts are in the unsatisfiable core [2020-12-23 08:03:08,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:03:10,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6477 backedges. 0 proven. 6477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:03:10,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537426788] [2020-12-23 08:03:10,798 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:03:10,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615009803] [2020-12-23 08:03:10,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:03:10,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-12-23 08:03:10,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909786796] [2020-12-23 08:03:10,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-23 08:03:10,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:03:10,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-23 08:03:10,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 08:03:10,800 INFO L87 Difference]: Start difference. First operand 267 states and 318 transitions. Second operand 55 states. [2020-12-23 08:03:13,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:03:13,479 INFO L93 Difference]: Finished difference Result 276 states and 328 transitions. [2020-12-23 08:03:13,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2020-12-23 08:03:13,480 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 266 [2020-12-23 08:03:13,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:03:13,482 INFO L225 Difference]: With dead ends: 276 [2020-12-23 08:03:13,482 INFO L226 Difference]: Without dead ends: 272 [2020-12-23 08:03:13,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4187, Invalid=6943, Unknown=0, NotChecked=0, Total=11130 [2020-12-23 08:03:13,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-12-23 08:03:13,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2020-12-23 08:03:13,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-12-23 08:03:13,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 324 transitions. [2020-12-23 08:03:13,498 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 324 transitions. Word has length 266 [2020-12-23 08:03:13,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:03:13,498 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 324 transitions. [2020-12-23 08:03:13,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-23 08:03:13,499 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 324 transitions. [2020-12-23 08:03:13,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-12-23 08:03:13,500 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:03:13,500 INFO L422 BasicCegarLoop]: trace histogram [53, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:03:13,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-12-23 08:03:13,715 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:03:13,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:03:13,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1614529579, now seen corresponding path program 52 times [2020-12-23 08:03:13,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:03:13,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925164733] [2020-12-23 08:03:13,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:03:13,724 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:03:13,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1454474915] [2020-12-23 08:03:13,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:03:13,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 08:03:13,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:03:13,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 107 conjunts are in the unsatisfiable core [2020-12-23 08:03:13,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:03:16,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6734 backedges. 0 proven. 6734 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:03:16,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925164733] [2020-12-23 08:03:16,495 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:03:16,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454474915] [2020-12-23 08:03:16,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:03:16,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-12-23 08:03:16,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978953617] [2020-12-23 08:03:16,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-23 08:03:16,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:03:16,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-23 08:03:16,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 08:03:16,497 INFO L87 Difference]: Start difference. First operand 272 states and 324 transitions. Second operand 56 states. [2020-12-23 08:03:19,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:03:19,126 INFO L93 Difference]: Finished difference Result 281 states and 334 transitions. [2020-12-23 08:03:19,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2020-12-23 08:03:19,126 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 271 [2020-12-23 08:03:19,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:03:19,128 INFO L225 Difference]: With dead ends: 281 [2020-12-23 08:03:19,128 INFO L226 Difference]: Without dead ends: 277 [2020-12-23 08:03:19,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1378 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=4347, Invalid=7209, Unknown=0, NotChecked=0, Total=11556 [2020-12-23 08:03:19,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-12-23 08:03:19,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2020-12-23 08:03:19,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-12-23 08:03:19,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 330 transitions. [2020-12-23 08:03:19,144 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 330 transitions. Word has length 271 [2020-12-23 08:03:19,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:03:19,145 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 330 transitions. [2020-12-23 08:03:19,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-23 08:03:19,145 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 330 transitions. [2020-12-23 08:03:19,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2020-12-23 08:03:19,146 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:03:19,147 INFO L422 BasicCegarLoop]: trace histogram [54, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:03:19,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:03:19,360 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:03:19,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:03:19,361 INFO L82 PathProgramCache]: Analyzing trace with hash -881036071, now seen corresponding path program 53 times [2020-12-23 08:03:19,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:03:19,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795738987] [2020-12-23 08:03:19,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:03:19,370 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:03:19,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [119482774] [2020-12-23 08:03:19,370 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:03:19,738 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2020-12-23 08:03:19,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:03:19,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 1076 conjuncts, 109 conjunts are in the unsatisfiable core [2020-12-23 08:03:19,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:03:22,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6996 backedges. 0 proven. 6996 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:03:22,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795738987] [2020-12-23 08:03:22,388 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:03:22,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119482774] [2020-12-23 08:03:22,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:03:22,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-12-23 08:03:22,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961576797] [2020-12-23 08:03:22,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-23 08:03:22,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:03:22,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-23 08:03:22,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 08:03:22,391 INFO L87 Difference]: Start difference. First operand 277 states and 330 transitions. Second operand 57 states. [2020-12-23 08:03:25,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:03:25,297 INFO L93 Difference]: Finished difference Result 286 states and 340 transitions. [2020-12-23 08:03:25,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2020-12-23 08:03:25,298 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 276 [2020-12-23 08:03:25,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:03:25,300 INFO L225 Difference]: With dead ends: 286 [2020-12-23 08:03:25,300 INFO L226 Difference]: Without dead ends: 282 [2020-12-23 08:03:25,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=4510, Invalid=7480, Unknown=0, NotChecked=0, Total=11990 [2020-12-23 08:03:25,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-12-23 08:03:25,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 282. [2020-12-23 08:03:25,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-12-23 08:03:25,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 336 transitions. [2020-12-23 08:03:25,311 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 336 transitions. Word has length 276 [2020-12-23 08:03:25,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:03:25,311 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 336 transitions. [2020-12-23 08:03:25,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-23 08:03:25,311 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 336 transitions. [2020-12-23 08:03:25,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2020-12-23 08:03:25,312 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:03:25,313 INFO L422 BasicCegarLoop]: trace histogram [55, 54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:03:25,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-12-23 08:03:25,513 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:03:25,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:03:25,514 INFO L82 PathProgramCache]: Analyzing trace with hash -434831125, now seen corresponding path program 54 times [2020-12-23 08:03:25,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:03:25,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492346201] [2020-12-23 08:03:25,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:03:25,523 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:03:25,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [950881857] [2020-12-23 08:03:25,523 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:03:26,135 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2020-12-23 08:03:26,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:03:26,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 1095 conjuncts, 111 conjunts are in the unsatisfiable core [2020-12-23 08:03:26,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:03:28,895 INFO L134 CoverageAnalysis]: Checked inductivity of 7263 backedges. 0 proven. 7263 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:03:28,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492346201] [2020-12-23 08:03:28,896 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:03:28,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950881857] [2020-12-23 08:03:28,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:03:28,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-12-23 08:03:28,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569385142] [2020-12-23 08:03:28,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-12-23 08:03:28,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:03:28,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-12-23 08:03:28,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 08:03:28,897 INFO L87 Difference]: Start difference. First operand 282 states and 336 transitions. Second operand 58 states. [2020-12-23 08:03:31,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:03:31,863 INFO L93 Difference]: Finished difference Result 291 states and 346 transitions. [2020-12-23 08:03:31,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2020-12-23 08:03:31,864 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 281 [2020-12-23 08:03:31,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:03:31,867 INFO L225 Difference]: With dead ends: 291 [2020-12-23 08:03:31,867 INFO L226 Difference]: Without dead ends: 287 [2020-12-23 08:03:31,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=4676, Invalid=7756, Unknown=0, NotChecked=0, Total=12432 [2020-12-23 08:03:31,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-12-23 08:03:31,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2020-12-23 08:03:31,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-12-23 08:03:31,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 342 transitions. [2020-12-23 08:03:31,882 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 342 transitions. Word has length 281 [2020-12-23 08:03:31,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:03:31,882 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 342 transitions. [2020-12-23 08:03:31,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-12-23 08:03:31,882 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 342 transitions. [2020-12-23 08:03:31,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-12-23 08:03:31,884 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:03:31,884 INFO L422 BasicCegarLoop]: trace histogram [56, 55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:03:32,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:03:32,099 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:03:32,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:03:32,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1347735527, now seen corresponding path program 55 times [2020-12-23 08:03:32,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:03:32,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596778888] [2020-12-23 08:03:32,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:03:32,108 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:03:32,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1322138589] [2020-12-23 08:03:32,108 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:03:32,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:03:32,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 1114 conjuncts, 113 conjunts are in the unsatisfiable core [2020-12-23 08:03:32,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:03:35,199 INFO L134 CoverageAnalysis]: Checked inductivity of 7535 backedges. 0 proven. 7535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:03:35,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596778888] [2020-12-23 08:03:35,200 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:03:35,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322138589] [2020-12-23 08:03:35,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:03:35,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-12-23 08:03:35,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362910389] [2020-12-23 08:03:35,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-12-23 08:03:35,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:03:35,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-12-23 08:03:35,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 08:03:35,202 INFO L87 Difference]: Start difference. First operand 287 states and 342 transitions. Second operand 59 states. [2020-12-23 08:03:38,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:03:38,279 INFO L93 Difference]: Finished difference Result 296 states and 352 transitions. [2020-12-23 08:03:38,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2020-12-23 08:03:38,279 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 286 [2020-12-23 08:03:38,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:03:38,281 INFO L225 Difference]: With dead ends: 296 [2020-12-23 08:03:38,281 INFO L226 Difference]: Without dead ends: 292 [2020-12-23 08:03:38,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=4845, Invalid=8037, Unknown=0, NotChecked=0, Total=12882 [2020-12-23 08:03:38,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-12-23 08:03:38,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 292. [2020-12-23 08:03:38,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2020-12-23 08:03:38,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 348 transitions. [2020-12-23 08:03:38,294 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 348 transitions. Word has length 286 [2020-12-23 08:03:38,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:03:38,294 INFO L481 AbstractCegarLoop]: Abstraction has 292 states and 348 transitions. [2020-12-23 08:03:38,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-12-23 08:03:38,294 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 348 transitions. [2020-12-23 08:03:38,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2020-12-23 08:03:38,296 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:03:38,296 INFO L422 BasicCegarLoop]: trace histogram [57, 56, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:03:38,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-12-23 08:03:38,512 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:03:38,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:03:38,512 INFO L82 PathProgramCache]: Analyzing trace with hash -166113877, now seen corresponding path program 56 times [2020-12-23 08:03:38,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:03:38,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442868042] [2020-12-23 08:03:38,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:03:38,521 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:03:38,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [216068362] [2020-12-23 08:03:38,522 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:03:38,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 08:03:38,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:03:38,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 1133 conjuncts, 115 conjunts are in the unsatisfiable core [2020-12-23 08:03:38,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:03:41,575 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 7812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:03:41,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442868042] [2020-12-23 08:03:41,576 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:03:41,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216068362] [2020-12-23 08:03:41,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:03:41,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-12-23 08:03:41,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972766127] [2020-12-23 08:03:41,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-23 08:03:41,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:03:41,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-23 08:03:41,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 08:03:41,578 INFO L87 Difference]: Start difference. First operand 292 states and 348 transitions. Second operand 60 states. [2020-12-23 08:03:44,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:03:44,885 INFO L93 Difference]: Finished difference Result 301 states and 358 transitions. [2020-12-23 08:03:44,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2020-12-23 08:03:44,886 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 291 [2020-12-23 08:03:44,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:03:44,888 INFO L225 Difference]: With dead ends: 301 [2020-12-23 08:03:44,888 INFO L226 Difference]: Without dead ends: 297 [2020-12-23 08:03:44,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=5017, Invalid=8323, Unknown=0, NotChecked=0, Total=13340 [2020-12-23 08:03:44,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-12-23 08:03:44,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 297. [2020-12-23 08:03:44,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-12-23 08:03:44,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 354 transitions. [2020-12-23 08:03:44,900 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 354 transitions. Word has length 291 [2020-12-23 08:03:44,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:03:44,900 INFO L481 AbstractCegarLoop]: Abstraction has 297 states and 354 transitions. [2020-12-23 08:03:44,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-23 08:03:44,900 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 354 transitions. [2020-12-23 08:03:44,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2020-12-23 08:03:44,901 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:03:44,901 INFO L422 BasicCegarLoop]: trace histogram [58, 57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:03:45,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-12-23 08:03:45,102 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:03:45,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:03:45,103 INFO L82 PathProgramCache]: Analyzing trace with hash -99034279, now seen corresponding path program 57 times [2020-12-23 08:03:45,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:03:45,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947085238] [2020-12-23 08:03:45,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:03:45,112 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:03:45,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [975096875] [2020-12-23 08:03:45,112 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:03:45,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2020-12-23 08:03:45,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:03:45,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 1152 conjuncts, 117 conjunts are in the unsatisfiable core [2020-12-23 08:03:45,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:03:48,767 INFO L134 CoverageAnalysis]: Checked inductivity of 8094 backedges. 0 proven. 8094 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:03:48,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947085238] [2020-12-23 08:03:48,767 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:03:48,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975096875] [2020-12-23 08:03:48,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:03:48,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-12-23 08:03:48,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051187274] [2020-12-23 08:03:48,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-12-23 08:03:48,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:03:48,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-12-23 08:03:48,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-12-23 08:03:48,769 INFO L87 Difference]: Start difference. First operand 297 states and 354 transitions. Second operand 61 states. [2020-12-23 08:03:52,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:03:52,140 INFO L93 Difference]: Finished difference Result 306 states and 364 transitions. [2020-12-23 08:03:52,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2020-12-23 08:03:52,141 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 296 [2020-12-23 08:03:52,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:03:52,143 INFO L225 Difference]: With dead ends: 306 [2020-12-23 08:03:52,143 INFO L226 Difference]: Without dead ends: 302 [2020-12-23 08:03:52,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=5192, Invalid=8614, Unknown=0, NotChecked=0, Total=13806 [2020-12-23 08:03:52,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2020-12-23 08:03:52,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 302. [2020-12-23 08:03:52,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2020-12-23 08:03:52,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 360 transitions. [2020-12-23 08:03:52,154 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 360 transitions. Word has length 296 [2020-12-23 08:03:52,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:03:52,154 INFO L481 AbstractCegarLoop]: Abstraction has 302 states and 360 transitions. [2020-12-23 08:03:52,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-12-23 08:03:52,154 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 360 transitions. [2020-12-23 08:03:52,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-12-23 08:03:52,155 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:03:52,156 INFO L422 BasicCegarLoop]: trace histogram [59, 58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:03:52,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:03:52,356 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:03:52,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:03:52,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1639230059, now seen corresponding path program 58 times [2020-12-23 08:03:52,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:03:52,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556091367] [2020-12-23 08:03:52,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:03:52,366 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:03:52,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1786956844] [2020-12-23 08:03:52,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:03:52,648 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 08:03:52,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:03:52,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 1171 conjuncts, 119 conjunts are in the unsatisfiable core [2020-12-23 08:03:52,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:03:55,865 INFO L134 CoverageAnalysis]: Checked inductivity of 8381 backedges. 0 proven. 8381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:03:55,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556091367] [2020-12-23 08:03:55,865 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:03:55,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786956844] [2020-12-23 08:03:55,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:03:55,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-12-23 08:03:55,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037614384] [2020-12-23 08:03:55,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-12-23 08:03:55,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:03:55,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-12-23 08:03:55,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 08:03:55,867 INFO L87 Difference]: Start difference. First operand 302 states and 360 transitions. Second operand 62 states. [2020-12-23 08:03:59,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:03:59,435 INFO L93 Difference]: Finished difference Result 311 states and 370 transitions. [2020-12-23 08:03:59,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2020-12-23 08:03:59,436 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 301 [2020-12-23 08:03:59,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:03:59,438 INFO L225 Difference]: With dead ends: 311 [2020-12-23 08:03:59,438 INFO L226 Difference]: Without dead ends: 307 [2020-12-23 08:03:59,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1711 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=5370, Invalid=8910, Unknown=0, NotChecked=0, Total=14280 [2020-12-23 08:03:59,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-12-23 08:03:59,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2020-12-23 08:03:59,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-12-23 08:03:59,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 366 transitions. [2020-12-23 08:03:59,453 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 366 transitions. Word has length 301 [2020-12-23 08:03:59,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:03:59,453 INFO L481 AbstractCegarLoop]: Abstraction has 307 states and 366 transitions. [2020-12-23 08:03:59,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-12-23 08:03:59,453 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 366 transitions. [2020-12-23 08:03:59,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2020-12-23 08:03:59,455 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:03:59,455 INFO L422 BasicCegarLoop]: trace histogram [60, 59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:03:59,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:03:59,666 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:03:59,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:03:59,666 INFO L82 PathProgramCache]: Analyzing trace with hash -589728103, now seen corresponding path program 59 times [2020-12-23 08:03:59,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:03:59,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138134780] [2020-12-23 08:03:59,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:03:59,678 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:03:59,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [560715232] [2020-12-23 08:03:59,679 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:04:00,135 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2020-12-23 08:04:00,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:04:00,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 1190 conjuncts, 121 conjunts are in the unsatisfiable core [2020-12-23 08:04:00,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:04:03,375 INFO L134 CoverageAnalysis]: Checked inductivity of 8673 backedges. 0 proven. 8673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:04:03,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138134780] [2020-12-23 08:04:03,375 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:04:03,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560715232] [2020-12-23 08:04:03,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:04:03,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-12-23 08:04:03,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669717269] [2020-12-23 08:04:03,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-23 08:04:03,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:04:03,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-23 08:04:03,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 08:04:03,378 INFO L87 Difference]: Start difference. First operand 307 states and 366 transitions. Second operand 63 states. [2020-12-23 08:04:06,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:04:06,954 INFO L93 Difference]: Finished difference Result 316 states and 376 transitions. [2020-12-23 08:04:06,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2020-12-23 08:04:06,954 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 306 [2020-12-23 08:04:06,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:04:06,956 INFO L225 Difference]: With dead ends: 316 [2020-12-23 08:04:06,957 INFO L226 Difference]: Without dead ends: 312 [2020-12-23 08:04:06,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=5551, Invalid=9211, Unknown=0, NotChecked=0, Total=14762 [2020-12-23 08:04:06,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-12-23 08:04:06,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2020-12-23 08:04:06,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-12-23 08:04:06,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 372 transitions. [2020-12-23 08:04:06,971 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 372 transitions. Word has length 306 [2020-12-23 08:04:06,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:04:06,972 INFO L481 AbstractCegarLoop]: Abstraction has 312 states and 372 transitions. [2020-12-23 08:04:06,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-23 08:04:06,972 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 372 transitions. [2020-12-23 08:04:06,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2020-12-23 08:04:06,973 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:04:06,973 INFO L422 BasicCegarLoop]: trace histogram [61, 60, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:04:07,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:04:07,188 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:04:07,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:04:07,188 INFO L82 PathProgramCache]: Analyzing trace with hash 592647979, now seen corresponding path program 60 times [2020-12-23 08:04:07,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:04:07,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119565818] [2020-12-23 08:04:07,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:04:07,198 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:04:07,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [352766190] [2020-12-23 08:04:07,198 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:04:07,861 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2020-12-23 08:04:07,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:04:07,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 1209 conjuncts, 123 conjunts are in the unsatisfiable core [2020-12-23 08:04:07,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:04:11,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8970 backedges. 0 proven. 8970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:04:11,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119565818] [2020-12-23 08:04:11,168 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:04:11,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352766190] [2020-12-23 08:04:11,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:04:11,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-12-23 08:04:11,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800169465] [2020-12-23 08:04:11,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-12-23 08:04:11,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:04:11,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-12-23 08:04:11,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 08:04:11,170 INFO L87 Difference]: Start difference. First operand 312 states and 372 transitions. Second operand 64 states. [2020-12-23 08:04:14,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:04:14,812 INFO L93 Difference]: Finished difference Result 321 states and 382 transitions. [2020-12-23 08:04:14,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2020-12-23 08:04:14,813 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 311 [2020-12-23 08:04:14,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:04:14,816 INFO L225 Difference]: With dead ends: 321 [2020-12-23 08:04:14,816 INFO L226 Difference]: Without dead ends: 317 [2020-12-23 08:04:14,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=5735, Invalid=9517, Unknown=0, NotChecked=0, Total=15252 [2020-12-23 08:04:14,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2020-12-23 08:04:14,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 317. [2020-12-23 08:04:14,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2020-12-23 08:04:14,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 378 transitions. [2020-12-23 08:04:14,828 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 378 transitions. Word has length 311 [2020-12-23 08:04:14,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:04:14,829 INFO L481 AbstractCegarLoop]: Abstraction has 317 states and 378 transitions. [2020-12-23 08:04:14,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-12-23 08:04:14,829 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 378 transitions. [2020-12-23 08:04:14,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2020-12-23 08:04:14,830 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:04:14,830 INFO L422 BasicCegarLoop]: trace histogram [62, 61, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:04:15,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:04:15,031 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:04:15,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:04:15,032 INFO L82 PathProgramCache]: Analyzing trace with hash 16843225, now seen corresponding path program 61 times [2020-12-23 08:04:15,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:04:15,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668899620] [2020-12-23 08:04:15,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:04:15,045 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:04:15,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1302897269] [2020-12-23 08:04:15,046 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:04:15,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:04:15,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 1228 conjuncts, 125 conjunts are in the unsatisfiable core [2020-12-23 08:04:15,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:04:18,774 INFO L134 CoverageAnalysis]: Checked inductivity of 9272 backedges. 0 proven. 9272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:04:18,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668899620] [2020-12-23 08:04:18,774 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:04:18,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302897269] [2020-12-23 08:04:18,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:04:18,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-12-23 08:04:18,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013973785] [2020-12-23 08:04:18,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-12-23 08:04:18,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:04:18,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-12-23 08:04:18,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2020-12-23 08:04:18,777 INFO L87 Difference]: Start difference. First operand 317 states and 378 transitions. Second operand 65 states. [2020-12-23 08:04:22,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:04:22,580 INFO L93 Difference]: Finished difference Result 326 states and 388 transitions. [2020-12-23 08:04:22,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2020-12-23 08:04:22,580 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 316 [2020-12-23 08:04:22,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:04:22,583 INFO L225 Difference]: With dead ends: 326 [2020-12-23 08:04:22,583 INFO L226 Difference]: Without dead ends: 322 [2020-12-23 08:04:22,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1891 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=5922, Invalid=9828, Unknown=0, NotChecked=0, Total=15750 [2020-12-23 08:04:22,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-12-23 08:04:22,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2020-12-23 08:04:22,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2020-12-23 08:04:22,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 384 transitions. [2020-12-23 08:04:22,601 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 384 transitions. Word has length 316 [2020-12-23 08:04:22,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:04:22,601 INFO L481 AbstractCegarLoop]: Abstraction has 322 states and 384 transitions. [2020-12-23 08:04:22,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-12-23 08:04:22,601 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 384 transitions. [2020-12-23 08:04:22,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-12-23 08:04:22,603 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:04:22,603 INFO L422 BasicCegarLoop]: trace histogram [63, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:04:22,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:04:22,817 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:04:22,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:04:22,817 INFO L82 PathProgramCache]: Analyzing trace with hash 509645803, now seen corresponding path program 62 times [2020-12-23 08:04:22,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:04:22,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857349311] [2020-12-23 08:04:22,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:04:22,826 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:04:22,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [651455994] [2020-12-23 08:04:22,827 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:04:23,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 08:04:23,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:04:23,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 1247 conjuncts, 127 conjunts are in the unsatisfiable core [2020-12-23 08:04:23,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:04:26,655 INFO L134 CoverageAnalysis]: Checked inductivity of 9579 backedges. 0 proven. 9579 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:04:26,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857349311] [2020-12-23 08:04:26,655 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:04:26,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651455994] [2020-12-23 08:04:26,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:04:26,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-12-23 08:04:26,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903241979] [2020-12-23 08:04:26,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-12-23 08:04:26,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:04:26,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-12-23 08:04:26,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2020-12-23 08:04:26,657 INFO L87 Difference]: Start difference. First operand 322 states and 384 transitions. Second operand 66 states. [2020-12-23 08:04:30,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:04:30,640 INFO L93 Difference]: Finished difference Result 331 states and 394 transitions. [2020-12-23 08:04:30,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2020-12-23 08:04:30,641 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 321 [2020-12-23 08:04:30,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:04:30,643 INFO L225 Difference]: With dead ends: 331 [2020-12-23 08:04:30,643 INFO L226 Difference]: Without dead ends: 327 [2020-12-23 08:04:30,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1953 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=6112, Invalid=10144, Unknown=0, NotChecked=0, Total=16256 [2020-12-23 08:04:30,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-12-23 08:04:30,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 327. [2020-12-23 08:04:30,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-12-23 08:04:30,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 390 transitions. [2020-12-23 08:04:30,660 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 390 transitions. Word has length 321 [2020-12-23 08:04:30,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:04:30,661 INFO L481 AbstractCegarLoop]: Abstraction has 327 states and 390 transitions. [2020-12-23 08:04:30,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-12-23 08:04:30,661 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 390 transitions. [2020-12-23 08:04:30,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-12-23 08:04:30,663 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:04:30,663 INFO L422 BasicCegarLoop]: trace histogram [64, 63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:04:30,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-12-23 08:04:30,878 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:04:30,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:04:30,878 INFO L82 PathProgramCache]: Analyzing trace with hash -962364135, now seen corresponding path program 63 times [2020-12-23 08:04:30,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:04:30,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706273992] [2020-12-23 08:04:30,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:04:30,887 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:04:30,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [496045965] [2020-12-23 08:04:30,888 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:04:31,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2020-12-23 08:04:31,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:04:31,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 1266 conjuncts, 129 conjunts are in the unsatisfiable core [2020-12-23 08:04:31,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:04:35,226 INFO L134 CoverageAnalysis]: Checked inductivity of 9891 backedges. 0 proven. 9891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:04:35,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706273992] [2020-12-23 08:04:35,227 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:04:35,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496045965] [2020-12-23 08:04:35,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:04:35,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-12-23 08:04:35,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339083] [2020-12-23 08:04:35,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-12-23 08:04:35,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:04:35,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-12-23 08:04:35,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2020-12-23 08:04:35,229 INFO L87 Difference]: Start difference. First operand 327 states and 390 transitions. Second operand 67 states. [2020-12-23 08:04:39,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:04:39,391 INFO L93 Difference]: Finished difference Result 336 states and 400 transitions. [2020-12-23 08:04:39,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2020-12-23 08:04:39,393 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 326 [2020-12-23 08:04:39,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:04:39,395 INFO L225 Difference]: With dead ends: 336 [2020-12-23 08:04:39,395 INFO L226 Difference]: Without dead ends: 332 [2020-12-23 08:04:39,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2016 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=6305, Invalid=10465, Unknown=0, NotChecked=0, Total=16770 [2020-12-23 08:04:39,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2020-12-23 08:04:39,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 332. [2020-12-23 08:04:39,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-12-23 08:04:39,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 396 transitions. [2020-12-23 08:04:39,409 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 396 transitions. Word has length 326 [2020-12-23 08:04:39,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:04:39,409 INFO L481 AbstractCegarLoop]: Abstraction has 332 states and 396 transitions. [2020-12-23 08:04:39,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-12-23 08:04:39,409 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 396 transitions. [2020-12-23 08:04:39,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-12-23 08:04:39,410 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:04:39,410 INFO L422 BasicCegarLoop]: trace histogram [65, 64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:04:39,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-12-23 08:04:39,611 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:04:39,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:04:39,612 INFO L82 PathProgramCache]: Analyzing trace with hash -548855637, now seen corresponding path program 64 times [2020-12-23 08:04:39,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:04:39,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323273098] [2020-12-23 08:04:39,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:04:39,621 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:04:39,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [157059354] [2020-12-23 08:04:39,622 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:04:39,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 08:04:39,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:04:39,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 1285 conjuncts, 131 conjunts are in the unsatisfiable core [2020-12-23 08:04:39,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:04:44,064 INFO L134 CoverageAnalysis]: Checked inductivity of 10208 backedges. 0 proven. 10208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:04:44,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323273098] [2020-12-23 08:04:44,064 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:04:44,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157059354] [2020-12-23 08:04:44,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:04:44,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-12-23 08:04:44,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595277739] [2020-12-23 08:04:44,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-23 08:04:44,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:04:44,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-23 08:04:44,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 08:04:44,067 INFO L87 Difference]: Start difference. First operand 332 states and 396 transitions. Second operand 68 states. [2020-12-23 08:04:48,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:04:48,544 INFO L93 Difference]: Finished difference Result 341 states and 406 transitions. [2020-12-23 08:04:48,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2020-12-23 08:04:48,546 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 331 [2020-12-23 08:04:48,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:04:48,547 INFO L225 Difference]: With dead ends: 341 [2020-12-23 08:04:48,547 INFO L226 Difference]: Without dead ends: 337 [2020-12-23 08:04:48,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=6501, Invalid=10791, Unknown=0, NotChecked=0, Total=17292 [2020-12-23 08:04:48,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-12-23 08:04:48,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 337. [2020-12-23 08:04:48,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-12-23 08:04:48,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 402 transitions. [2020-12-23 08:04:48,565 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 402 transitions. Word has length 331 [2020-12-23 08:04:48,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:04:48,565 INFO L481 AbstractCegarLoop]: Abstraction has 337 states and 402 transitions. [2020-12-23 08:04:48,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-12-23 08:04:48,566 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 402 transitions. [2020-12-23 08:04:48,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-12-23 08:04:48,567 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:04:48,567 INFO L422 BasicCegarLoop]: trace histogram [66, 65, 65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:04:48,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:04:48,780 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:04:48,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:04:48,781 INFO L82 PathProgramCache]: Analyzing trace with hash -2066421671, now seen corresponding path program 65 times [2020-12-23 08:04:48,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:04:48,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189639553] [2020-12-23 08:04:48,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:04:48,791 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:04:48,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1453414499] [2020-12-23 08:04:48,791 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:04:49,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2020-12-23 08:04:49,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:04:49,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 1304 conjuncts, 133 conjunts are in the unsatisfiable core [2020-12-23 08:04:49,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:04:53,430 INFO L134 CoverageAnalysis]: Checked inductivity of 10530 backedges. 0 proven. 10530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:04:53,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189639553] [2020-12-23 08:04:53,430 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:04:53,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453414499] [2020-12-23 08:04:53,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:04:53,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-12-23 08:04:53,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517175639] [2020-12-23 08:04:53,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-12-23 08:04:53,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:04:53,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-12-23 08:04:53,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2020-12-23 08:04:53,433 INFO L87 Difference]: Start difference. First operand 337 states and 402 transitions. Second operand 69 states. [2020-12-23 08:04:58,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:04:58,181 INFO L93 Difference]: Finished difference Result 346 states and 412 transitions. [2020-12-23 08:04:58,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2020-12-23 08:04:58,182 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 336 [2020-12-23 08:04:58,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:04:58,184 INFO L225 Difference]: With dead ends: 346 [2020-12-23 08:04:58,184 INFO L226 Difference]: Without dead ends: 342 [2020-12-23 08:04:58,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2145 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=6700, Invalid=11122, Unknown=0, NotChecked=0, Total=17822 [2020-12-23 08:04:58,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2020-12-23 08:04:58,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 342. [2020-12-23 08:04:58,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342 states. [2020-12-23 08:04:58,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 408 transitions. [2020-12-23 08:04:58,195 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 408 transitions. Word has length 336 [2020-12-23 08:04:58,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:04:58,196 INFO L481 AbstractCegarLoop]: Abstraction has 342 states and 408 transitions. [2020-12-23 08:04:58,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-12-23 08:04:58,196 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 408 transitions. [2020-12-23 08:04:58,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-12-23 08:04:58,197 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:04:58,197 INFO L422 BasicCegarLoop]: trace histogram [67, 66, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:04:58,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-12-23 08:04:58,398 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:04:58,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:04:58,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1534639467, now seen corresponding path program 66 times [2020-12-23 08:04:58,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:04:58,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903109538] [2020-12-23 08:04:58,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:04:58,408 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:04:58,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1126842590] [2020-12-23 08:04:58,408 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:04:59,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2020-12-23 08:04:59,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:04:59,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 1323 conjuncts, 135 conjunts are in the unsatisfiable core [2020-12-23 08:04:59,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:05:03,526 INFO L134 CoverageAnalysis]: Checked inductivity of 10857 backedges. 0 proven. 10857 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:05:03,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903109538] [2020-12-23 08:05:03,527 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:05:03,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126842590] [2020-12-23 08:05:03,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:05:03,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2020-12-23 08:05:03,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59864080] [2020-12-23 08:05:03,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-12-23 08:05:03,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:05:03,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-12-23 08:05:03,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 08:05:03,529 INFO L87 Difference]: Start difference. First operand 342 states and 408 transitions. Second operand 70 states. [2020-12-23 08:05:08,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:05:08,557 INFO L93 Difference]: Finished difference Result 351 states and 418 transitions. [2020-12-23 08:05:08,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2020-12-23 08:05:08,558 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 341 [2020-12-23 08:05:08,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:05:08,559 INFO L225 Difference]: With dead ends: 351 [2020-12-23 08:05:08,560 INFO L226 Difference]: Without dead ends: 347 [2020-12-23 08:05:08,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2211 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=6902, Invalid=11458, Unknown=0, NotChecked=0, Total=18360 [2020-12-23 08:05:08,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-12-23 08:05:08,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 347. [2020-12-23 08:05:08,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 347 states. [2020-12-23 08:05:08,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 414 transitions. [2020-12-23 08:05:08,571 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 414 transitions. Word has length 341 [2020-12-23 08:05:08,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:05:08,572 INFO L481 AbstractCegarLoop]: Abstraction has 347 states and 414 transitions. [2020-12-23 08:05:08,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-12-23 08:05:08,572 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 414 transitions. [2020-12-23 08:05:08,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2020-12-23 08:05:08,573 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:05:08,573 INFO L422 BasicCegarLoop]: trace histogram [68, 67, 67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:05:08,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-12-23 08:05:08,774 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:05:08,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:05:08,775 INFO L82 PathProgramCache]: Analyzing trace with hash -911653991, now seen corresponding path program 67 times [2020-12-23 08:05:08,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:05:08,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040645659] [2020-12-23 08:05:08,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:05:08,784 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:05:08,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1368243253] [2020-12-23 08:05:08,785 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:05:09,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:05:09,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 1342 conjuncts, 137 conjunts are in the unsatisfiable core [2020-12-23 08:05:09,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:05:13,407 INFO L134 CoverageAnalysis]: Checked inductivity of 11189 backedges. 0 proven. 11189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:05:13,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040645659] [2020-12-23 08:05:13,408 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:05:13,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368243253] [2020-12-23 08:05:13,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:05:13,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-12-23 08:05:13,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782356887] [2020-12-23 08:05:13,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-12-23 08:05:13,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:05:13,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-12-23 08:05:13,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2020-12-23 08:05:13,410 INFO L87 Difference]: Start difference. First operand 347 states and 414 transitions. Second operand 71 states. [2020-12-23 08:05:18,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:05:18,199 INFO L93 Difference]: Finished difference Result 356 states and 424 transitions. [2020-12-23 08:05:18,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2020-12-23 08:05:18,200 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 346 [2020-12-23 08:05:18,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:05:18,202 INFO L225 Difference]: With dead ends: 356 [2020-12-23 08:05:18,202 INFO L226 Difference]: Without dead ends: 352 [2020-12-23 08:05:18,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2278 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=7107, Invalid=11799, Unknown=0, NotChecked=0, Total=18906 [2020-12-23 08:05:18,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-12-23 08:05:18,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2020-12-23 08:05:18,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-12-23 08:05:18,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 420 transitions. [2020-12-23 08:05:18,214 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 420 transitions. Word has length 346 [2020-12-23 08:05:18,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:05:18,214 INFO L481 AbstractCegarLoop]: Abstraction has 352 states and 420 transitions. [2020-12-23 08:05:18,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-12-23 08:05:18,215 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 420 transitions. [2020-12-23 08:05:18,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-12-23 08:05:18,216 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:05:18,217 INFO L422 BasicCegarLoop]: trace histogram [69, 68, 68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:05:18,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2020-12-23 08:05:18,429 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:05:18,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:05:18,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1319409109, now seen corresponding path program 68 times [2020-12-23 08:05:18,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:05:18,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550264034] [2020-12-23 08:05:18,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:05:18,439 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:05:18,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1643377124] [2020-12-23 08:05:18,439 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:05:18,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 08:05:18,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:05:18,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 1361 conjuncts, 139 conjunts are in the unsatisfiable core [2020-12-23 08:05:18,771 INFO L286 TraceCheckSpWp]: Computing forward predicates...