/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/loop-new/gauss_sum.i.p+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:58:20,235 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:58:20,238 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:58:20,271 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 06:58:20,271 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 06:58:20,273 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 06:58:20,275 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 06:58:20,277 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 06:58:20,279 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 06:58:20,281 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 06:58:20,282 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 06:58:20,283 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 06:58:20,284 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:58:20,285 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:58:20,287 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:58:20,288 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:58:20,289 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:58:20,290 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:58:20,293 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:58:20,295 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:58:20,297 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:58:20,298 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:58:20,300 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:58:20,301 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:58:20,304 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 06:58:20,308 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 06:58:20,309 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 06:58:20,311 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 06:58:20,312 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 06:58:20,313 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 06:58:20,313 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 06:58:20,314 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 06:58:20,315 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 06:58:20,315 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:58:20,316 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:58:20,317 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:58:20,318 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 06:58:20,346 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:58:20,347 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:58:20,348 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:58:20,348 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:58:20,349 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:58:20,349 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:58:20,349 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:58:20,349 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:58:20,350 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:58:20,350 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:58:20,350 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:58:20,350 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:58:20,351 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:58:20,351 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:58:20,351 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:58:20,351 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:58:20,352 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:58:20,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:58:20,352 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:58:20,352 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:58:20,353 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:58:20,353 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:58:20,353 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:58:20,353 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:58:20,353 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:58:20,354 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:58:20,801 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:58:20,827 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:58:20,830 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:58:20,832 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:58:20,833 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:58:20,833 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-new/gauss_sum.i.p+cfa-reducer.c [2020-12-23 06:58:20,908 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/42c1716d3/5f7199d4ee1c4db9a759eb1305c3a0db/FLAG6aa68db95 [2020-12-23 06:58:21,494 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:58:21,495 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-new/gauss_sum.i.p+cfa-reducer.c [2020-12-23 06:58:21,502 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/42c1716d3/5f7199d4ee1c4db9a759eb1305c3a0db/FLAG6aa68db95 [2020-12-23 06:58:21,858 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/42c1716d3/5f7199d4ee1c4db9a759eb1305c3a0db [2020-12-23 06:58:21,861 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:58:21,863 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:58:21,869 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:58:21,869 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:58:21,876 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:58:21,876 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:58:21" (1/1) ... [2020-12-23 06:58:21,878 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5116ccb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:58:21, skipping insertion in model container [2020-12-23 06:58:21,878 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:58:21" (1/1) ... [2020-12-23 06:58:21,888 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:58:21,907 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~main__n~0,] left hand side expression in assignment: lhs: VariableLHS[~main__sum~0,] left hand side expression in assignment: lhs: VariableLHS[~main__i~0,] left hand side expression in assignment: lhs: VariableLHS[~main__sum~0,] left hand side expression in assignment: lhs: VariableLHS[~main__i~0,] left hand side expression in assignment: lhs: VariableLHS[~__tmp_1~0,] left hand side expression in assignment: lhs: VariableLHS[~__VERIFIER_assert__cond~0,] [2020-12-23 06:58:22,105 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/loop-new/gauss_sum.i.p+cfa-reducer.c[1014,1027] left hand side expression in assignment: lhs: VariableLHS[~__return_80~0,GLOBAL] [2020-12-23 06:58:22,110 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:58:22,121 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~main__n~0,] left hand side expression in assignment: lhs: VariableLHS[~main__sum~0,] left hand side expression in assignment: lhs: VariableLHS[~main__i~0,] left hand side expression in assignment: lhs: VariableLHS[~main__sum~0,] left hand side expression in assignment: lhs: VariableLHS[~main__i~0,] left hand side expression in assignment: lhs: VariableLHS[~__tmp_1~0,] left hand side expression in assignment: lhs: VariableLHS[~__VERIFIER_assert__cond~0,] [2020-12-23 06:58:22,141 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/loop-new/gauss_sum.i.p+cfa-reducer.c[1014,1027] left hand side expression in assignment: lhs: VariableLHS[~__return_80~0,GLOBAL] [2020-12-23 06:58:22,142 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:58:22,161 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:58:22,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:58:22 WrapperNode [2020-12-23 06:58:22,162 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:58:22,163 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:58:22,163 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:58:22,163 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:58:22,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:58:22" (1/1) ... [2020-12-23 06:58:22,182 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:58:22" (1/1) ... [2020-12-23 06:58:22,202 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:58:22,203 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:58:22,203 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:58:22,204 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:58:22,213 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:58:22" (1/1) ... [2020-12-23 06:58:22,213 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:58:22" (1/1) ... [2020-12-23 06:58:22,215 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:58:22" (1/1) ... [2020-12-23 06:58:22,215 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:58:22" (1/1) ... [2020-12-23 06:58:22,219 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:58:22" (1/1) ... [2020-12-23 06:58:22,221 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:58:22" (1/1) ... [2020-12-23 06:58:22,222 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:58:22" (1/1) ... [2020-12-23 06:58:22,224 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:58:22,225 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:58:22,225 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:58:22,226 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:58:22,226 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:58:22" (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 06:58:22,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:58:22,330 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:58:22,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:58:22,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:58:22,562 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:58:22,562 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-23 06:58:22,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:58:22 BoogieIcfgContainer [2020-12-23 06:58:22,565 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:58:22,566 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:58:22,567 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:58:22,571 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:58:22,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:58:21" (1/3) ... [2020-12-23 06:58:22,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6df04833 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:58:22, skipping insertion in model container [2020-12-23 06:58:22,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:58:22" (2/3) ... [2020-12-23 06:58:22,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6df04833 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:58:22, skipping insertion in model container [2020-12-23 06:58:22,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:58:22" (3/3) ... [2020-12-23 06:58:22,575 INFO L111 eAbstractionObserver]: Analyzing ICFG gauss_sum.i.p+cfa-reducer.c [2020-12-23 06:58:22,582 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:58:22,588 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 06:58:22,611 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 06:58:22,649 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:58:22,649 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:58:22,649 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:58:22,650 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:58:22,650 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:58:22,650 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:58:22,650 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:58:22,650 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:58:22,675 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-12-23 06:58:22,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 06:58:22,682 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:22,683 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:22,683 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:22,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:22,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1806908747, now seen corresponding path program 1 times [2020-12-23 06:58:22,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:22,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480711541] [2020-12-23 06:58:22,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:22,823 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:58:22,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1604564027] [2020-12-23 06:58:22,824 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 06:58:22,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:22,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 06:58:22,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:23,129 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 06:58:23,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480711541] [2020-12-23 06:58:23,131 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:58:23,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604564027] [2020-12-23 06:58:23,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:58:23,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 06:58:23,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117308612] [2020-12-23 06:58:23,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 06:58:23,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:23,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 06:58:23,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 06:58:23,164 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 4 states. [2020-12-23 06:58:23,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:23,229 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-12-23 06:58:23,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 06:58:23,233 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-23 06:58:23,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:23,243 INFO L225 Difference]: With dead ends: 21 [2020-12-23 06:58:23,243 INFO L226 Difference]: Without dead ends: 9 [2020-12-23 06:58:23,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 06:58:23,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-12-23 06:58:23,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-12-23 06:58:23,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-23 06:58:23,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2020-12-23 06:58:23,292 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2020-12-23 06:58:23,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:23,293 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2020-12-23 06:58:23,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 06:58:23,294 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2020-12-23 06:58:23,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 06:58:23,295 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:23,296 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:23,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-23 06:58:23,511 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:23,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:23,512 INFO L82 PathProgramCache]: Analyzing trace with hash 179533835, now seen corresponding path program 1 times [2020-12-23 06:58:23,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:23,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784975788] [2020-12-23 06:58:23,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:23,530 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:58:23,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [262601679] [2020-12-23 06:58:23,530 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 06:58:23,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:23,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 06:58:23,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:23,682 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:58:23,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:23,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784975788] [2020-12-23 06:58:23,707 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:58:23,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262601679] [2020-12-23 06:58:23,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:58:23,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 06:58:23,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404721160] [2020-12-23 06:58:23,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 06:58:23,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:23,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 06:58:23,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 06:58:23,712 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2020-12-23 06:58:23,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:23,770 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2020-12-23 06:58:23,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 06:58:23,771 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-12-23 06:58:23,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:23,772 INFO L225 Difference]: With dead ends: 13 [2020-12-23 06:58:23,772 INFO L226 Difference]: Without dead ends: 10 [2020-12-23 06:58:23,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:58:23,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-23 06:58:23,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-23 06:58:23,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-23 06:58:23,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-12-23 06:58:23,780 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2020-12-23 06:58:23,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:23,780 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-12-23 06:58:23,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 06:58:23,780 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-12-23 06:58:23,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 06:58:23,781 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:23,781 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:23,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:24,000 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:24,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:24,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1270519115, now seen corresponding path program 2 times [2020-12-23 06:58:24,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:24,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747410299] [2020-12-23 06:58:24,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:24,025 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:58:24,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2091392151] [2020-12-23 06:58:24,025 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 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 06:58:24,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:58:24,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:24,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 06:58:24,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:24,192 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:58:24,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:24,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747410299] [2020-12-23 06:58:24,223 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:58:24,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091392151] [2020-12-23 06:58:24,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:58:24,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 06:58:24,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910056259] [2020-12-23 06:58:24,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 06:58:24,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:24,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 06:58:24,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-23 06:58:24,226 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2020-12-23 06:58:24,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:24,297 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2020-12-23 06:58:24,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 06:58:24,298 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-12-23 06:58:24,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:24,299 INFO L225 Difference]: With dead ends: 14 [2020-12-23 06:58:24,299 INFO L226 Difference]: Without dead ends: 11 [2020-12-23 06:58:24,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:58:24,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-23 06:58:24,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-12-23 06:58:24,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-23 06:58:24,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-12-23 06:58:24,304 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2020-12-23 06:58:24,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:24,304 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-12-23 06:58:24,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 06:58:24,304 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-12-23 06:58:24,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 06:58:24,305 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:24,305 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:24,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:24,520 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:24,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:24,521 INFO L82 PathProgramCache]: Analyzing trace with hash 731324427, now seen corresponding path program 3 times [2020-12-23 06:58:24,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:24,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986450058] [2020-12-23 06:58:24,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:24,546 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:58:24,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1163664789] [2020-12-23 06:58:24,548 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 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 06:58:24,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 06:58:24,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:24,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 06:58:24,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:24,771 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:58:24,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:24,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986450058] [2020-12-23 06:58:24,796 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:58:24,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163664789] [2020-12-23 06:58:24,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:58:24,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 06:58:24,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366968435] [2020-12-23 06:58:24,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 06:58:24,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:24,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 06:58:24,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:58:24,799 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 7 states. [2020-12-23 06:58:24,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:24,878 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2020-12-23 06:58:24,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 06:58:24,879 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-12-23 06:58:24,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:24,880 INFO L225 Difference]: With dead ends: 15 [2020-12-23 06:58:24,880 INFO L226 Difference]: Without dead ends: 12 [2020-12-23 06:58:24,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:58:24,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-23 06:58:24,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-23 06:58:24,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-23 06:58:24,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-12-23 06:58:24,885 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-12-23 06:58:24,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:24,885 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-12-23 06:58:24,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 06:58:24,885 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-12-23 06:58:24,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 06:58:24,886 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:24,886 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:25,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:25,102 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:25,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:25,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1196158283, now seen corresponding path program 4 times [2020-12-23 06:58:25,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:25,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429233036] [2020-12-23 06:58:25,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:25,122 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:58:25,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1352959922] [2020-12-23 06:58:25,123 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 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 06:58:25,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:58:25,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:25,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 06:58:25,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:25,343 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:58:25,375 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:25,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429233036] [2020-12-23 06:58:25,377 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:58:25,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352959922] [2020-12-23 06:58:25,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:58:25,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 06:58:25,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844712709] [2020-12-23 06:58:25,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 06:58:25,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:25,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 06:58:25,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:58:25,384 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 8 states. [2020-12-23 06:58:25,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:25,488 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-12-23 06:58:25,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 06:58:25,489 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-12-23 06:58:25,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:25,494 INFO L225 Difference]: With dead ends: 16 [2020-12-23 06:58:25,494 INFO L226 Difference]: Without dead ends: 13 [2020-12-23 06:58:25,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:58:25,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-23 06:58:25,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-23 06:58:25,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-23 06:58:25,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-12-23 06:58:25,502 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-12-23 06:58:25,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:25,503 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-12-23 06:58:25,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 06:58:25,503 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-12-23 06:58:25,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 06:58:25,504 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:25,504 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:25,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:25,718 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:25,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:25,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1573861365, now seen corresponding path program 5 times [2020-12-23 06:58:25,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:25,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999286438] [2020-12-23 06:58:25,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:25,738 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:58:25,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [796623589] [2020-12-23 06:58:25,738 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 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 06:58:25,809 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-23 06:58:25,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:25,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 06:58:25,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:25,971 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:58:25,997 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:25,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999286438] [2020-12-23 06:58:25,997 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:58:25,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796623589] [2020-12-23 06:58:25,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:58:25,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 06:58:25,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589202548] [2020-12-23 06:58:25,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 06:58:25,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:25,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 06:58:26,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:58:26,000 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 9 states. [2020-12-23 06:58:26,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:26,104 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2020-12-23 06:58:26,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 06:58:26,105 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-12-23 06:58:26,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:26,105 INFO L225 Difference]: With dead ends: 17 [2020-12-23 06:58:26,106 INFO L226 Difference]: Without dead ends: 14 [2020-12-23 06:58:26,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:58:26,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-23 06:58:26,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-23 06:58:26,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-23 06:58:26,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-12-23 06:58:26,110 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-12-23 06:58:26,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:26,110 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-12-23 06:58:26,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 06:58:26,111 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-12-23 06:58:26,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 06:58:26,111 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:26,111 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:26,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:26,325 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:26,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:26,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1545124533, now seen corresponding path program 6 times [2020-12-23 06:58:26,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:26,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173590413] [2020-12-23 06:58:26,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:26,344 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:58:26,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1086420242] [2020-12-23 06:58:26,344 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 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 06:58:26,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-23 06:58:26,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:26,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 06:58:26,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:26,531 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:58:26,558 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 06:58:26,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173590413] [2020-12-23 06:58:26,558 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:58:26,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086420242] [2020-12-23 06:58:26,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:58:26,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 06:58:26,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541071670] [2020-12-23 06:58:26,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 06:58:26,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:26,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 06:58:26,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:58:26,562 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 10 states. [2020-12-23 06:58:26,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:26,654 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-12-23 06:58:26,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 06:58:26,654 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-12-23 06:58:26,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:26,656 INFO L225 Difference]: With dead ends: 18 [2020-12-23 06:58:26,656 INFO L226 Difference]: Without dead ends: 15 [2020-12-23 06:58:26,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:58:26,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-23 06:58:26,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-23 06:58:26,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-23 06:58:26,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-12-23 06:58:26,662 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-12-23 06:58:26,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:26,663 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-12-23 06:58:26,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 06:58:26,663 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-12-23 06:58:26,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 06:58:26,665 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:26,665 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:26,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:26,876 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:26,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:26,877 INFO L82 PathProgramCache]: Analyzing trace with hash -654282741, now seen corresponding path program 7 times [2020-12-23 06:58:26,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:26,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896531148] [2020-12-23 06:58:26,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:26,892 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:58:26,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1408667531] [2020-12-23 06:58:26,892 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 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 06:58:26,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:26,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 06:58:26,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:27,087 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:58:27,118 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:27,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896531148] [2020-12-23 06:58:27,119 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:58:27,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408667531] [2020-12-23 06:58:27,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:58:27,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-23 06:58:27,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461227169] [2020-12-23 06:58:27,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 06:58:27,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:27,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 06:58:27,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:58:27,123 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 11 states. [2020-12-23 06:58:27,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:27,228 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-12-23 06:58:27,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 06:58:27,228 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-12-23 06:58:27,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:27,230 INFO L225 Difference]: With dead ends: 19 [2020-12-23 06:58:27,230 INFO L226 Difference]: Without dead ends: 16 [2020-12-23 06:58:27,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:58:27,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-23 06:58:27,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-23 06:58:27,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-23 06:58:27,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-12-23 06:58:27,235 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-12-23 06:58:27,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:27,235 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-12-23 06:58:27,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 06:58:27,235 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-12-23 06:58:27,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 06:58:27,236 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:27,236 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:27,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-23 06:58:27,444 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:27,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:27,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1192009035, now seen corresponding path program 8 times [2020-12-23 06:58:27,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:27,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100629989] [2020-12-23 06:58:27,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:27,468 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:58:27,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1254166686] [2020-12-23 06:58:27,472 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 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 06:58:27,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:58:27,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:27,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 06:58:27,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:27,676 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:58:27,696 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:27,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100629989] [2020-12-23 06:58:27,697 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:58:27,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254166686] [2020-12-23 06:58:27,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:58:27,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-23 06:58:27,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094208058] [2020-12-23 06:58:27,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 06:58:27,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:27,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 06:58:27,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:58:27,699 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 12 states. [2020-12-23 06:58:27,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:27,797 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-12-23 06:58:27,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 06:58:27,798 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-12-23 06:58:27,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:27,799 INFO L225 Difference]: With dead ends: 20 [2020-12-23 06:58:27,799 INFO L226 Difference]: Without dead ends: 17 [2020-12-23 06:58:27,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:58:27,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-23 06:58:27,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-23 06:58:27,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 06:58:27,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-12-23 06:58:27,804 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-12-23 06:58:27,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:27,804 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-12-23 06:58:27,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 06:58:27,804 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-12-23 06:58:27,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 06:58:27,805 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:27,805 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:28,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:28,021 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:28,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:28,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1702488053, now seen corresponding path program 9 times [2020-12-23 06:58:28,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:28,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495922397] [2020-12-23 06:58:28,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:28,040 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:58:28,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1952369099] [2020-12-23 06:58:28,040 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 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 06:58:28,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 06:58:28,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:28,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-23 06:58:28,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:28,280 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:58:28,304 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:28,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495922397] [2020-12-23 06:58:28,304 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:58:28,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952369099] [2020-12-23 06:58:28,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:58:28,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-23 06:58:28,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008857702] [2020-12-23 06:58:28,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 06:58:28,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:28,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 06:58:28,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:58:28,307 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 13 states. [2020-12-23 06:58:28,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:28,442 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-12-23 06:58:28,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 06:58:28,442 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-12-23 06:58:28,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:28,443 INFO L225 Difference]: With dead ends: 21 [2020-12-23 06:58:28,443 INFO L226 Difference]: Without dead ends: 18 [2020-12-23 06:58:28,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-12-23 06:58:28,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-23 06:58:28,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-23 06:58:28,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 06:58:28,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-12-23 06:58:28,448 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2020-12-23 06:58:28,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:28,449 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-12-23 06:58:28,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 06:58:28,449 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-12-23 06:58:28,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 06:58:28,449 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:28,449 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:28,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:28,664 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:28,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:28,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1237584565, now seen corresponding path program 10 times [2020-12-23 06:58:28,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:28,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742440629] [2020-12-23 06:58:28,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:28,689 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:58:28,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1360056515] [2020-12-23 06:58:28,689 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 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 06:58:28,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:58:28,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:28,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-23 06:58:28,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:28,934 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:58:28,957 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:28,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742440629] [2020-12-23 06:58:28,958 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:58:28,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360056515] [2020-12-23 06:58:28,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:58:28,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-12-23 06:58:28,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37339283] [2020-12-23 06:58:28,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 06:58:28,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:28,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 06:58:28,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-12-23 06:58:28,960 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 14 states. [2020-12-23 06:58:29,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:29,091 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-12-23 06:58:29,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 06:58:29,092 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-12-23 06:58:29,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:29,093 INFO L225 Difference]: With dead ends: 22 [2020-12-23 06:58:29,093 INFO L226 Difference]: Without dead ends: 19 [2020-12-23 06:58:29,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-12-23 06:58:29,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-23 06:58:29,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-23 06:58:29,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-23 06:58:29,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-12-23 06:58:29,099 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2020-12-23 06:58:29,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:29,099 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-12-23 06:58:29,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 06:58:29,099 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-12-23 06:58:29,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 06:58:29,100 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:29,100 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:29,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-23 06:58:29,315 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:29,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:29,316 INFO L82 PathProgramCache]: Analyzing trace with hash 289521675, now seen corresponding path program 11 times [2020-12-23 06:58:29,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:29,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765681896] [2020-12-23 06:58:29,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:29,337 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:58:29,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [709213642] [2020-12-23 06:58:29,337 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 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 06:58:29,390 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-23 06:58:29,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:29,392 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-23 06:58:29,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:29,599 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:58:29,625 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:29,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765681896] [2020-12-23 06:58:29,625 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:58:29,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709213642] [2020-12-23 06:58:29,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:58:29,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-12-23 06:58:29,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138430479] [2020-12-23 06:58:29,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 06:58:29,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:29,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 06:58:29,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-12-23 06:58:29,627 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 15 states. [2020-12-23 06:58:29,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:29,770 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-12-23 06:58:29,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 06:58:29,770 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-12-23 06:58:29,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:29,771 INFO L225 Difference]: With dead ends: 23 [2020-12-23 06:58:29,771 INFO L226 Difference]: Without dead ends: 20 [2020-12-23 06:58:29,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-12-23 06:58:29,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-23 06:58:29,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-23 06:58:29,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 06:58:29,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-12-23 06:58:29,776 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2020-12-23 06:58:29,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:29,777 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-12-23 06:58:29,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 06:58:29,777 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-12-23 06:58:29,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 06:58:29,777 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:29,778 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:29,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:29,992 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:29,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:29,993 INFO L82 PathProgramCache]: Analyzing trace with hash 385174859, now seen corresponding path program 12 times [2020-12-23 06:58:29,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:29,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675922065] [2020-12-23 06:58:29,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:30,008 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:58:30,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2066139184] [2020-12-23 06:58:30,008 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 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 06:58:30,067 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 06:58:30,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:30,070 WARN L261 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-23 06:58:30,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:30,292 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:58:30,319 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:30,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675922065] [2020-12-23 06:58:30,319 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:58:30,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066139184] [2020-12-23 06:58:30,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:58:30,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-12-23 06:58:30,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17669194] [2020-12-23 06:58:30,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 06:58:30,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:30,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 06:58:30,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-12-23 06:58:30,322 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 16 states. [2020-12-23 06:58:30,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:30,502 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-12-23 06:58:30,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 06:58:30,503 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-12-23 06:58:30,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:30,504 INFO L225 Difference]: With dead ends: 24 [2020-12-23 06:58:30,504 INFO L226 Difference]: Without dead ends: 21 [2020-12-23 06:58:30,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-12-23 06:58:30,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-23 06:58:30,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-23 06:58:30,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 06:58:30,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-12-23 06:58:30,510 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2020-12-23 06:58:30,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:30,510 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-12-23 06:58:30,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 06:58:30,510 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-12-23 06:58:30,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 06:58:30,511 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:30,511 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:30,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 06:58:30,726 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:30,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:30,726 INFO L82 PathProgramCache]: Analyzing trace with hash -944543733, now seen corresponding path program 13 times [2020-12-23 06:58:30,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:30,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582387445] [2020-12-23 06:58:30,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:30,740 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:58:30,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [498197403] [2020-12-23 06:58:30,741 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 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 06:58:30,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:30,808 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-23 06:58:30,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:31,062 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:58:31,090 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:31,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582387445] [2020-12-23 06:58:31,091 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:58:31,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498197403] [2020-12-23 06:58:31,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:58:31,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-12-23 06:58:31,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207623490] [2020-12-23 06:58:31,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 06:58:31,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:31,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 06:58:31,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-12-23 06:58:31,093 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 17 states. [2020-12-23 06:58:31,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:31,294 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-12-23 06:58:31,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 06:58:31,295 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-12-23 06:58:31,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:31,296 INFO L225 Difference]: With dead ends: 25 [2020-12-23 06:58:31,296 INFO L226 Difference]: Without dead ends: 22 [2020-12-23 06:58:31,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-12-23 06:58:31,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-23 06:58:31,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-23 06:58:31,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 06:58:31,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-12-23 06:58:31,301 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2020-12-23 06:58:31,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:31,301 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-12-23 06:58:31,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 06:58:31,302 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-12-23 06:58:31,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 06:58:31,302 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:31,302 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:31,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:31,517 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:31,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:31,518 INFO L82 PathProgramCache]: Analyzing trace with hash 783852875, now seen corresponding path program 14 times [2020-12-23 06:58:31,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:31,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823631302] [2020-12-23 06:58:31,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:31,533 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:58:31,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2002765774] [2020-12-23 06:58:31,533 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 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 06:58:31,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:58:31,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:31,601 WARN L261 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-23 06:58:31,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:31,885 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:58:31,915 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:31,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823631302] [2020-12-23 06:58:31,916 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:58:31,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002765774] [2020-12-23 06:58:31,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:58:31,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-12-23 06:58:31,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936254618] [2020-12-23 06:58:31,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 06:58:31,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:31,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 06:58:31,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-12-23 06:58:31,917 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 18 states. [2020-12-23 06:58:32,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:32,154 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-12-23 06:58:32,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 06:58:32,154 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-12-23 06:58:32,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:32,155 INFO L225 Difference]: With dead ends: 26 [2020-12-23 06:58:32,155 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 06:58:32,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-12-23 06:58:32,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 06:58:32,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-23 06:58:32,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 06:58:32,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-12-23 06:58:32,161 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2020-12-23 06:58:32,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:32,161 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-12-23 06:58:32,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 06:58:32,161 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-12-23 06:58:32,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 06:58:32,162 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:32,162 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:32,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 06:58:32,378 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:32,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:32,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1470427125, now seen corresponding path program 15 times [2020-12-23 06:58:32,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:32,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448468010] [2020-12-23 06:58:32,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:32,392 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:58:32,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1647189584] [2020-12-23 06:58:32,393 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 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 06:58:32,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-23 06:58:32,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:32,461 WARN L261 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 72 conjunts are in the unsatisfiable core [2020-12-23 06:58:32,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:32,839 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:58:32,863 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:32,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448468010] [2020-12-23 06:58:32,864 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:58:32,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647189584] [2020-12-23 06:58:32,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:58:32,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-12-23 06:58:32,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834384024] [2020-12-23 06:58:32,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 06:58:32,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:32,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 06:58:32,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-12-23 06:58:32,867 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 20 states. [2020-12-23 06:58:33,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:33,147 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-12-23 06:58:33,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 06:58:33,148 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 22 [2020-12-23 06:58:33,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:33,149 INFO L225 Difference]: With dead ends: 27 [2020-12-23 06:58:33,149 INFO L226 Difference]: Without dead ends: 24 [2020-12-23 06:58:33,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2020-12-23 06:58:33,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-23 06:58:33,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-23 06:58:33,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 06:58:33,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-12-23 06:58:33,154 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2020-12-23 06:58:33,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:33,154 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-12-23 06:58:33,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 06:58:33,155 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-12-23 06:58:33,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 06:58:33,155 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:33,155 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:33,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 06:58:33,370 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:33,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:33,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1661336907, now seen corresponding path program 16 times [2020-12-23 06:58:33,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:33,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416048896] [2020-12-23 06:58:33,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:33,386 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:58:33,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [771677491] [2020-12-23 06:58:33,387 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 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 06:58:33,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:58:33,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:33,449 WARN L261 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 75 conjunts are in the unsatisfiable core [2020-12-23 06:58:33,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:33,755 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:58:33,786 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:33,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416048896] [2020-12-23 06:58:33,787 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:58:33,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771677491] [2020-12-23 06:58:33,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:58:33,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-12-23 06:58:33,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997699135] [2020-12-23 06:58:33,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 06:58:33,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:33,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 06:58:33,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-12-23 06:58:33,789 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 20 states. [2020-12-23 06:58:34,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:34,053 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-12-23 06:58:34,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 06:58:34,054 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-12-23 06:58:34,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:34,055 INFO L225 Difference]: With dead ends: 28 [2020-12-23 06:58:34,055 INFO L226 Difference]: Without dead ends: 25 [2020-12-23 06:58:34,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2020-12-23 06:58:34,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-23 06:58:34,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-12-23 06:58:34,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 06:58:34,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-12-23 06:58:34,060 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2020-12-23 06:58:34,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:34,060 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-12-23 06:58:34,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 06:58:34,061 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-12-23 06:58:34,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 06:58:34,061 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:34,061 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:34,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 06:58:34,276 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:34,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:34,277 INFO L82 PathProgramCache]: Analyzing trace with hash -38225909, now seen corresponding path program 17 times [2020-12-23 06:58:34,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:34,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828294529] [2020-12-23 06:58:34,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:34,290 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:58:34,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [164957553] [2020-12-23 06:58:34,291 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 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 06:58:34,353 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-23 06:58:34,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:34,355 WARN L261 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 79 conjunts are in the unsatisfiable core [2020-12-23 06:58:34,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:34,708 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:58:34,749 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:34,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828294529] [2020-12-23 06:58:34,750 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:58:34,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164957553] [2020-12-23 06:58:34,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:58:34,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-12-23 06:58:34,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140556705] [2020-12-23 06:58:34,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 06:58:34,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:34,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 06:58:34,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-12-23 06:58:34,752 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 21 states. [2020-12-23 06:58:35,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:35,068 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-12-23 06:58:35,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 06:58:35,069 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-12-23 06:58:35,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:35,069 INFO L225 Difference]: With dead ends: 29 [2020-12-23 06:58:35,070 INFO L226 Difference]: Without dead ends: 26 [2020-12-23 06:58:35,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2020-12-23 06:58:35,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-23 06:58:35,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-23 06:58:35,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 06:58:35,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-12-23 06:58:35,076 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2020-12-23 06:58:35,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:35,076 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-12-23 06:58:35,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 06:58:35,076 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-12-23 06:58:35,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 06:58:35,077 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:35,077 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:35,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 06:58:35,290 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:35,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:35,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1185065653, now seen corresponding path program 18 times [2020-12-23 06:58:35,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:35,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972245900] [2020-12-23 06:58:35,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:35,302 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:58:35,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [48736601] [2020-12-23 06:58:35,303 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 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 06:58:36,483 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-12-23 06:58:36,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:36,486 WARN L261 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 84 conjunts are in the unsatisfiable core [2020-12-23 06:58:36,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:36,985 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:58:37,010 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:37,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972245900] [2020-12-23 06:58:37,011 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:58:37,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48736601] [2020-12-23 06:58:37,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:58:37,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-12-23 06:58:37,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029357490] [2020-12-23 06:58:37,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 06:58:37,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:37,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 06:58:37,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2020-12-23 06:58:37,013 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 23 states. [2020-12-23 06:58:37,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:37,398 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-12-23 06:58:37,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 06:58:37,400 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 25 [2020-12-23 06:58:37,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:37,401 INFO L225 Difference]: With dead ends: 30 [2020-12-23 06:58:37,401 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 06:58:37,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2020-12-23 06:58:37,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 06:58:37,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-23 06:58:37,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 06:58:37,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-12-23 06:58:37,406 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2020-12-23 06:58:37,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:37,406 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-12-23 06:58:37,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 06:58:37,406 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-12-23 06:58:37,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 06:58:37,407 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:37,407 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:37,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:37,610 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:37,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:37,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1917607947, now seen corresponding path program 19 times [2020-12-23 06:58:37,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:37,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298304167] [2020-12-23 06:58:37,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:37,623 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:58:37,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [280657836] [2020-12-23 06:58:37,623 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 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 06:58:37,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:37,702 WARN L261 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 87 conjunts are in the unsatisfiable core [2020-12-23 06:58:37,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:38,163 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:58:38,201 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:38,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298304167] [2020-12-23 06:58:38,202 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:58:38,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280657836] [2020-12-23 06:58:38,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:58:38,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-12-23 06:58:38,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893552342] [2020-12-23 06:58:38,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 06:58:38,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:38,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 06:58:38,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-12-23 06:58:38,204 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 23 states. [2020-12-23 06:58:38,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:38,596 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-12-23 06:58:38,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 06:58:38,597 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-12-23 06:58:38,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:38,598 INFO L225 Difference]: With dead ends: 31 [2020-12-23 06:58:38,598 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 06:58:38,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2020-12-23 06:58:38,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 06:58:38,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-23 06:58:38,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 06:58:38,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-12-23 06:58:38,604 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2020-12-23 06:58:38,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:38,605 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-12-23 06:58:38,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 06:58:38,605 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-12-23 06:58:38,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 06:58:38,605 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:38,605 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:38,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:38,818 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:38,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:38,819 INFO L82 PathProgramCache]: Analyzing trace with hash -683758261, now seen corresponding path program 20 times [2020-12-23 06:58:38,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:38,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475191282] [2020-12-23 06:58:38,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:38,830 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:58:38,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1850272810] [2020-12-23 06:58:38,831 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 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 06:58:38,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:58:38,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:38,931 WARN L261 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 91 conjunts are in the unsatisfiable core [2020-12-23 06:58:38,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:39,362 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:58:39,406 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:39,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475191282] [2020-12-23 06:58:39,406 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:58:39,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850272810] [2020-12-23 06:58:39,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:58:39,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-12-23 06:58:39,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107444996] [2020-12-23 06:58:39,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 06:58:39,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:39,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 06:58:39,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-12-23 06:58:39,408 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 24 states. [2020-12-23 06:58:39,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:39,856 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-12-23 06:58:39,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 06:58:39,856 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-12-23 06:58:39,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:39,857 INFO L225 Difference]: With dead ends: 32 [2020-12-23 06:58:39,857 INFO L226 Difference]: Without dead ends: 29 [2020-12-23 06:58:39,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2020-12-23 06:58:39,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-23 06:58:39,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-23 06:58:39,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 06:58:39,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-12-23 06:58:39,872 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2020-12-23 06:58:39,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:39,873 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-12-23 06:58:39,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 06:58:39,873 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-12-23 06:58:39,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 06:58:39,878 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:39,878 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:40,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 06:58:40,086 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:40,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:40,087 INFO L82 PathProgramCache]: Analyzing trace with hash 278267915, now seen corresponding path program 21 times [2020-12-23 06:58:40,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:40,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687402441] [2020-12-23 06:58:40,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:40,111 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:58:40,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1933207584] [2020-12-23 06:58:40,112 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 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 06:58:41,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-12-23 06:58:41,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:41,268 WARN L261 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 95 conjunts are in the unsatisfiable core [2020-12-23 06:58:41,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:41,810 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:58:41,850 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:41,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687402441] [2020-12-23 06:58:41,850 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:58:41,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933207584] [2020-12-23 06:58:41,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:58:41,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-12-23 06:58:41,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957119217] [2020-12-23 06:58:41,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 06:58:41,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:41,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 06:58:41,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-12-23 06:58:41,852 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 25 states. [2020-12-23 06:58:42,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:42,345 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-12-23 06:58:42,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 06:58:42,347 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-12-23 06:58:42,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:42,348 INFO L225 Difference]: With dead ends: 33 [2020-12-23 06:58:42,348 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 06:58:42,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2020-12-23 06:58:42,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 06:58:42,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-23 06:58:42,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 06:58:42,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-12-23 06:58:42,355 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2020-12-23 06:58:42,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:42,355 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-12-23 06:58:42,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 06:58:42,355 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-12-23 06:58:42,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 06:58:42,355 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:42,356 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:42,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:42,569 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:42,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:42,569 INFO L82 PathProgramCache]: Analyzing trace with hash 36308299, now seen corresponding path program 22 times [2020-12-23 06:58:42,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:42,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111967691] [2020-12-23 06:58:42,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:42,581 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:58:42,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [215807848] [2020-12-23 06:58:42,582 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 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 06:58:42,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:58:42,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:42,642 WARN L261 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 99 conjunts are in the unsatisfiable core [2020-12-23 06:58:42,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:43,205 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:58:43,246 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:43,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111967691] [2020-12-23 06:58:43,247 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:58:43,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215807848] [2020-12-23 06:58:43,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:58:43,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-12-23 06:58:43,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399683558] [2020-12-23 06:58:43,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 06:58:43,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:43,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 06:58:43,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-12-23 06:58:43,249 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 26 states. [2020-12-23 06:58:43,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:43,745 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-12-23 06:58:43,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 06:58:43,745 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-12-23 06:58:43,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:43,746 INFO L225 Difference]: With dead ends: 34 [2020-12-23 06:58:43,746 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 06:58:43,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2020-12-23 06:58:43,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 06:58:43,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-12-23 06:58:43,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 06:58:43,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-12-23 06:58:43,751 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2020-12-23 06:58:43,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:43,751 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-12-23 06:58:43,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 06:58:43,752 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-12-23 06:58:43,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 06:58:43,752 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:43,752 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:43,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 06:58:43,953 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:43,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:43,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1125494795, now seen corresponding path program 23 times [2020-12-23 06:58:43,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:43,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320992507] [2020-12-23 06:58:43,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:43,970 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:58:43,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1926926694] [2020-12-23 06:58:43,970 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 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 06:58:44,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-12-23 06:58:44,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:44,033 WARN L261 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 103 conjunts are in the unsatisfiable core [2020-12-23 06:58:44,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:44,648 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:58:44,701 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:44,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320992507] [2020-12-23 06:58:44,702 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:58:44,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926926694] [2020-12-23 06:58:44,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:58:44,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-12-23 06:58:44,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807220094] [2020-12-23 06:58:44,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 06:58:44,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:44,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 06:58:44,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-12-23 06:58:44,703 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 27 states. [2020-12-23 06:58:45,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:45,281 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-12-23 06:58:45,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 06:58:45,282 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-12-23 06:58:45,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:45,283 INFO L225 Difference]: With dead ends: 35 [2020-12-23 06:58:45,283 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 06:58:45,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2020-12-23 06:58:45,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 06:58:45,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-23 06:58:45,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 06:58:45,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-12-23 06:58:45,289 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2020-12-23 06:58:45,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:45,289 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-12-23 06:58:45,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 06:58:45,289 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-12-23 06:58:45,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 06:58:45,290 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:45,290 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:45,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:45,504 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:45,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:45,506 INFO L82 PathProgramCache]: Analyzing trace with hash 530537803, now seen corresponding path program 24 times [2020-12-23 06:58:45,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:45,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301126353] [2020-12-23 06:58:45,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:45,520 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:58:45,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [935905780] [2020-12-23 06:58:45,521 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 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 06:58:46,688 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 06:58:46,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:46,692 WARN L261 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 108 conjunts are in the unsatisfiable core [2020-12-23 06:58:46,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:47,407 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:58:47,435 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:47,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301126353] [2020-12-23 06:58:47,436 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:58:47,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935905780] [2020-12-23 06:58:47,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:58:47,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-12-23 06:58:47,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165175750] [2020-12-23 06:58:47,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 06:58:47,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:47,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 06:58:47,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2020-12-23 06:58:47,438 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 29 states. [2020-12-23 06:58:48,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:48,106 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-12-23 06:58:48,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 06:58:48,107 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 31 [2020-12-23 06:58:48,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:48,107 INFO L225 Difference]: With dead ends: 36 [2020-12-23 06:58:48,107 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 06:58:48,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2020-12-23 06:58:48,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 06:58:48,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-23 06:58:48,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 06:58:48,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-12-23 06:58:48,115 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2020-12-23 06:58:48,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:48,115 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-12-23 06:58:48,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 06:58:48,115 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-12-23 06:58:48,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 06:58:48,116 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:48,116 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:48,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 06:58:48,320 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:48,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:48,320 INFO L82 PathProgramCache]: Analyzing trace with hash -733259765, now seen corresponding path program 25 times [2020-12-23 06:58:48,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:48,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347700413] [2020-12-23 06:58:48,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:48,340 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:58:48,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [167218290] [2020-12-23 06:58:48,340 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 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 06:58:48,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:48,410 WARN L261 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 111 conjunts are in the unsatisfiable core [2020-12-23 06:58:48,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:49,059 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:58:49,112 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:49,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347700413] [2020-12-23 06:58:49,113 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:58:49,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167218290] [2020-12-23 06:58:49,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:58:49,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-12-23 06:58:49,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248811013] [2020-12-23 06:58:49,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 06:58:49,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:49,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 06:58:49,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-12-23 06:58:49,115 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 29 states. [2020-12-23 06:58:49,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:49,821 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-12-23 06:58:49,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 06:58:49,822 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-12-23 06:58:49,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:49,823 INFO L225 Difference]: With dead ends: 37 [2020-12-23 06:58:49,823 INFO L226 Difference]: Without dead ends: 34 [2020-12-23 06:58:49,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2020-12-23 06:58:49,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-23 06:58:49,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-12-23 06:58:49,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 06:58:49,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-12-23 06:58:49,830 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2020-12-23 06:58:49,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:49,830 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-12-23 06:58:49,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 06:58:49,830 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-12-23 06:58:49,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 06:58:49,830 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:49,830 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:50,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 06:58:50,045 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:50,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:50,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1256278709, now seen corresponding path program 26 times [2020-12-23 06:58:50,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:50,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636650499] [2020-12-23 06:58:50,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:50,062 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:58:50,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [15873501] [2020-12-23 06:58:50,062 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 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 06:58:50,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:58:50,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:50,135 WARN L261 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 115 conjunts are in the unsatisfiable core [2020-12-23 06:58:50,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:50,846 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:58:50,888 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:50,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636650499] [2020-12-23 06:58:50,888 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:58:50,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15873501] [2020-12-23 06:58:50,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:58:50,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-12-23 06:58:50,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173607105] [2020-12-23 06:58:50,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 06:58:50,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:50,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 06:58:50,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2020-12-23 06:58:50,890 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 30 states. [2020-12-23 06:58:51,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:51,628 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-12-23 06:58:51,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 06:58:51,629 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-12-23 06:58:51,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:51,629 INFO L225 Difference]: With dead ends: 38 [2020-12-23 06:58:51,630 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 06:58:51,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=61, Invalid=869, Unknown=0, NotChecked=0, Total=930 [2020-12-23 06:58:51,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 06:58:51,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-12-23 06:58:51,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-23 06:58:51,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-12-23 06:58:51,637 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2020-12-23 06:58:51,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:51,637 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-12-23 06:58:51,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 06:58:51,637 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-12-23 06:58:51,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 06:58:51,638 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:51,638 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:51,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 06:58:51,841 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:51,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:51,841 INFO L82 PathProgramCache]: Analyzing trace with hash -289996789, now seen corresponding path program 27 times [2020-12-23 06:58:51,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:51,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073631211] [2020-12-23 06:58:51,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:51,853 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:58:51,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1761941497] [2020-12-23 06:58:51,853 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 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 06:58:51,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-12-23 06:58:51,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:51,992 WARN L261 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 119 conjunts are in the unsatisfiable core [2020-12-23 06:58:51,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:52,832 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:58:52,888 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:52,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073631211] [2020-12-23 06:58:52,888 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:58:52,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761941497] [2020-12-23 06:58:52,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:58:52,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-12-23 06:58:52,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505207757] [2020-12-23 06:58:52,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 06:58:52,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:52,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 06:58:52,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-12-23 06:58:52,890 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 31 states. [2020-12-23 06:58:53,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:53,748 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-12-23 06:58:53,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 06:58:53,749 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-12-23 06:58:53,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:53,750 INFO L225 Difference]: With dead ends: 39 [2020-12-23 06:58:53,750 INFO L226 Difference]: Without dead ends: 36 [2020-12-23 06:58:53,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=63, Invalid=929, Unknown=0, NotChecked=0, Total=992 [2020-12-23 06:58:53,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-23 06:58:53,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-12-23 06:58:53,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 06:58:53,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-12-23 06:58:53,756 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2020-12-23 06:58:53,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:53,757 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-12-23 06:58:53,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 06:58:53,757 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-12-23 06:58:53,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 06:58:53,757 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:53,757 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:53,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 06:58:53,961 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:53,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:53,961 INFO L82 PathProgramCache]: Analyzing trace with hash -400028341, now seen corresponding path program 28 times [2020-12-23 06:58:53,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:53,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874374534] [2020-12-23 06:58:53,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:53,973 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:58:53,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1654354434] [2020-12-23 06:58:53,974 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 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 06:58:54,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:58:54,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:54,049 WARN L261 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 123 conjunts are in the unsatisfiable core [2020-12-23 06:58:54,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:54,949 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:58:55,003 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:55,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874374534] [2020-12-23 06:58:55,004 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:58:55,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654354434] [2020-12-23 06:58:55,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:58:55,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-12-23 06:58:55,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169368924] [2020-12-23 06:58:55,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 06:58:55,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:55,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 06:58:55,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2020-12-23 06:58:55,006 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 32 states. [2020-12-23 06:58:55,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:55,852 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-12-23 06:58:55,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 06:58:55,853 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-12-23 06:58:55,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:55,853 INFO L225 Difference]: With dead ends: 40 [2020-12-23 06:58:55,854 INFO L226 Difference]: Without dead ends: 37 [2020-12-23 06:58:55,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 06:58:55,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-23 06:58:55,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-23 06:58:55,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 06:58:55,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-12-23 06:58:55,860 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2020-12-23 06:58:55,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:55,860 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-12-23 06:58:55,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 06:58:55,861 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-12-23 06:58:55,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 06:58:55,861 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:55,861 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:56,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 06:58:56,076 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:56,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:56,077 INFO L82 PathProgramCache]: Analyzing trace with hash 483960843, now seen corresponding path program 29 times [2020-12-23 06:58:56,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:56,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641671875] [2020-12-23 06:58:56,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:56,089 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:58:56,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [507586961] [2020-12-23 06:58:56,089 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 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 06:58:56,157 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-12-23 06:58:56,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:56,170 WARN L261 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 127 conjunts are in the unsatisfiable core [2020-12-23 06:58:56,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:57,129 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:58:57,193 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:57,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641671875] [2020-12-23 06:58:57,193 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:58:57,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507586961] [2020-12-23 06:58:57,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:58:57,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-12-23 06:58:57,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786202803] [2020-12-23 06:58:57,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 06:58:57,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:57,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 06:58:57,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 06:58:57,195 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 33 states. [2020-12-23 06:58:58,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:58,231 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-12-23 06:58:58,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 06:58:58,232 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-12-23 06:58:58,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:58,233 INFO L225 Difference]: With dead ends: 41 [2020-12-23 06:58:58,233 INFO L226 Difference]: Without dead ends: 38 [2020-12-23 06:58:58,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=67, Invalid=1055, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 06:58:58,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-23 06:58:58,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-12-23 06:58:58,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 06:58:58,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-12-23 06:58:58,238 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2020-12-23 06:58:58,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:58,238 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-12-23 06:58:58,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 06:58:58,238 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-12-23 06:58:58,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 06:58:58,239 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:58,239 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:58,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:58,440 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:58,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:58,440 INFO L82 PathProgramCache]: Analyzing trace with hash 2117821771, now seen corresponding path program 30 times [2020-12-23 06:58:58,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:58,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049828222] [2020-12-23 06:58:58,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:58,450 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:58:58,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [651895970] [2020-12-23 06:58:58,451 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 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 06:58:59,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2020-12-23 06:58:59,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:59,690 WARN L261 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 132 conjunts are in the unsatisfiable core [2020-12-23 06:58:59,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:00,852 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:59:00,888 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:00,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049828222] [2020-12-23 06:59:00,889 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:59:00,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651895970] [2020-12-23 06:59:00,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:59:00,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-12-23 06:59:00,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104397752] [2020-12-23 06:59:00,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 06:59:00,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:00,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 06:59:00,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 06:59:00,891 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 35 states. [2020-12-23 06:59:02,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:02,096 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-12-23 06:59:02,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 06:59:02,096 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 37 [2020-12-23 06:59:02,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:02,097 INFO L225 Difference]: With dead ends: 42 [2020-12-23 06:59:02,097 INFO L226 Difference]: Without dead ends: 39 [2020-12-23 06:59:02,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=103, Invalid=1157, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 06:59:02,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-23 06:59:02,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-12-23 06:59:02,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 06:59:02,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-12-23 06:59:02,103 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2020-12-23 06:59:02,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:02,104 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-12-23 06:59:02,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 06:59:02,104 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-12-23 06:59:02,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 06:59:02,104 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:02,104 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:02,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:02,305 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:02,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:02,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1227902987, now seen corresponding path program 31 times [2020-12-23 06:59:02,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:02,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271537279] [2020-12-23 06:59:02,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:02,317 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:59:02,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1211436188] [2020-12-23 06:59:02,318 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 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 06:59:02,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:59:02,405 WARN L261 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 135 conjunts are in the unsatisfiable core [2020-12-23 06:59:02,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:03,491 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:59:03,557 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:03,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271537279] [2020-12-23 06:59:03,557 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:59:03,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211436188] [2020-12-23 06:59:03,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:59:03,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-12-23 06:59:03,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976944671] [2020-12-23 06:59:03,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 06:59:03,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:03,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 06:59:03,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 06:59:03,559 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 35 states. [2020-12-23 06:59:04,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:04,689 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2020-12-23 06:59:04,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 06:59:04,690 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-12-23 06:59:04,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:04,691 INFO L225 Difference]: With dead ends: 43 [2020-12-23 06:59:04,691 INFO L226 Difference]: Without dead ends: 40 [2020-12-23 06:59:04,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=71, Invalid=1189, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 06:59:04,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-23 06:59:04,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-12-23 06:59:04,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-23 06:59:04,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-12-23 06:59:04,698 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2020-12-23 06:59:04,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:04,698 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-12-23 06:59:04,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 06:59:04,698 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-12-23 06:59:04,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 06:59:04,699 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:04,699 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:04,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-23 06:59:04,910 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:04,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:04,910 INFO L82 PathProgramCache]: Analyzing trace with hash -589775541, now seen corresponding path program 32 times [2020-12-23 06:59:04,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:04,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380969990] [2020-12-23 06:59:04,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:04,922 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:59:04,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [445006287] [2020-12-23 06:59:04,922 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 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 06:59:04,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:59:04,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:05,004 WARN L261 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 139 conjunts are in the unsatisfiable core [2020-12-23 06:59:05,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:06,183 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:59:06,251 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:06,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380969990] [2020-12-23 06:59:06,252 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:59:06,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445006287] [2020-12-23 06:59:06,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:59:06,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-12-23 06:59:06,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214083884] [2020-12-23 06:59:06,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 06:59:06,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:06,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 06:59:06,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 06:59:06,253 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 36 states. [2020-12-23 06:59:07,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:07,474 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-12-23 06:59:07,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 06:59:07,474 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-12-23 06:59:07,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:07,474 INFO L225 Difference]: With dead ends: 44 [2020-12-23 06:59:07,474 INFO L226 Difference]: Without dead ends: 41 [2020-12-23 06:59:07,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=73, Invalid=1259, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 06:59:07,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-23 06:59:07,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-12-23 06:59:07,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-23 06:59:07,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-12-23 06:59:07,479 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2020-12-23 06:59:07,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:07,480 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-12-23 06:59:07,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 06:59:07,480 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-12-23 06:59:07,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 06:59:07,480 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:07,481 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:07,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:07,687 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:07,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:07,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1103235061, now seen corresponding path program 33 times [2020-12-23 06:59:07,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:07,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335655207] [2020-12-23 06:59:07,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:07,701 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:59:07,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [800834464] [2020-12-23 06:59:07,701 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 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 06:59:07,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-12-23 06:59:07,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:07,824 WARN L261 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 144 conjunts are in the unsatisfiable core [2020-12-23 06:59:07,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:09,233 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:59:09,274 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:09,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335655207] [2020-12-23 06:59:09,275 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:59:09,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800834464] [2020-12-23 06:59:09,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:59:09,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-12-23 06:59:09,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837751915] [2020-12-23 06:59:09,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-23 06:59:09,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:09,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-23 06:59:09,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 06:59:09,276 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 38 states. [2020-12-23 06:59:10,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:10,724 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2020-12-23 06:59:10,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 06:59:10,725 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 40 [2020-12-23 06:59:10,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:10,726 INFO L225 Difference]: With dead ends: 45 [2020-12-23 06:59:10,726 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 06:59:10,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 06:59:10,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 06:59:10,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-12-23 06:59:10,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 06:59:10,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-12-23 06:59:10,730 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2020-12-23 06:59:10,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:10,731 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-12-23 06:59:10,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-23 06:59:10,731 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-12-23 06:59:10,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 06:59:10,731 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:10,731 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:10,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-23 06:59:10,932 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:10,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:10,932 INFO L82 PathProgramCache]: Analyzing trace with hash 159389003, now seen corresponding path program 34 times [2020-12-23 06:59:10,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:10,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528064144] [2020-12-23 06:59:10,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:10,945 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:59:10,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [240640211] [2020-12-23 06:59:10,945 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 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 06:59:11,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:59:11,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:11,020 WARN L261 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 147 conjunts are in the unsatisfiable core [2020-12-23 06:59:11,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:12,250 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:59:12,315 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:12,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528064144] [2020-12-23 06:59:12,315 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:59:12,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240640211] [2020-12-23 06:59:12,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:59:12,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-12-23 06:59:12,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308141944] [2020-12-23 06:59:12,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-23 06:59:12,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:12,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-23 06:59:12,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 06:59:12,318 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 38 states. [2020-12-23 06:59:14,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:14,038 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-12-23 06:59:14,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 06:59:14,038 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 41 [2020-12-23 06:59:14,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:14,038 INFO L225 Difference]: With dead ends: 46 [2020-12-23 06:59:14,039 INFO L226 Difference]: Without dead ends: 43 [2020-12-23 06:59:14,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=77, Invalid=1405, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 06:59:14,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-23 06:59:14,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-12-23 06:59:14,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-23 06:59:14,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-12-23 06:59:14,043 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2020-12-23 06:59:14,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:14,043 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-12-23 06:59:14,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-23 06:59:14,043 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-12-23 06:59:14,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 06:59:14,044 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:14,044 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:14,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:14,245 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:14,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:14,246 INFO L82 PathProgramCache]: Analyzing trace with hash 646029323, now seen corresponding path program 35 times [2020-12-23 06:59:14,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:14,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698794873] [2020-12-23 06:59:14,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:14,264 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:59:14,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1985605857] [2020-12-23 06:59:14,264 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 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 06:59:14,345 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2020-12-23 06:59:14,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:14,349 WARN L261 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 151 conjunts are in the unsatisfiable core [2020-12-23 06:59:14,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:15,708 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:59:15,782 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:15,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698794873] [2020-12-23 06:59:15,783 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:59:15,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985605857] [2020-12-23 06:59:15,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:59:15,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-12-23 06:59:15,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552602991] [2020-12-23 06:59:15,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 06:59:15,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:15,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 06:59:15,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 06:59:15,784 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 39 states. [2020-12-23 06:59:17,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:17,426 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2020-12-23 06:59:17,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 06:59:17,426 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 42 [2020-12-23 06:59:17,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:17,427 INFO L225 Difference]: With dead ends: 47 [2020-12-23 06:59:17,427 INFO L226 Difference]: Without dead ends: 44 [2020-12-23 06:59:17,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=79, Invalid=1481, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 06:59:17,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-23 06:59:17,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-12-23 06:59:17,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-23 06:59:17,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-12-23 06:59:17,434 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2020-12-23 06:59:17,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:17,434 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-12-23 06:59:17,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 06:59:17,434 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-12-23 06:59:17,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 06:59:17,435 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:17,435 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:17,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-23 06:59:17,636 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:17,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:17,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1447989941, now seen corresponding path program 36 times [2020-12-23 06:59:17,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:17,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462019527] [2020-12-23 06:59:17,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:17,649 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:59:17,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2077968839] [2020-12-23 06:59:17,650 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 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 06:59:18,870 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-23 06:59:18,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:18,875 WARN L261 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 156 conjunts are in the unsatisfiable core [2020-12-23 06:59:18,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:20,699 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:59:20,745 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:20,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462019527] [2020-12-23 06:59:20,745 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:59:20,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077968839] [2020-12-23 06:59:20,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:59:20,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-12-23 06:59:20,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990490900] [2020-12-23 06:59:20,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 06:59:20,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:20,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 06:59:20,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 06:59:20,747 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 41 states. [2020-12-23 06:59:22,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:22,749 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-12-23 06:59:22,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 06:59:22,750 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 43 [2020-12-23 06:59:22,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:22,751 INFO L225 Difference]: With dead ends: 48 [2020-12-23 06:59:22,751 INFO L226 Difference]: Without dead ends: 45 [2020-12-23 06:59:22,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=121, Invalid=1601, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 06:59:22,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-23 06:59:22,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-12-23 06:59:22,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-23 06:59:22,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-12-23 06:59:22,757 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2020-12-23 06:59:22,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:22,758 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-12-23 06:59:22,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 06:59:22,758 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-12-23 06:59:22,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-23 06:59:22,758 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:22,758 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:22,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 06:59:22,959 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:22,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:22,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1938077685, now seen corresponding path program 37 times [2020-12-23 06:59:22,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:22,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996294043] [2020-12-23 06:59:22,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:22,971 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:59:22,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1473318248] [2020-12-23 06:59:22,971 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 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 06:59:23,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:59:23,055 WARN L261 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 159 conjunts are in the unsatisfiable core [2020-12-23 06:59:23,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:24,539 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:59:24,626 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:24,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996294043] [2020-12-23 06:59:24,627 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:59:24,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473318248] [2020-12-23 06:59:24,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:59:24,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-12-23 06:59:24,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493049121] [2020-12-23 06:59:24,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 06:59:24,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:24,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 06:59:24,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 06:59:24,629 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 41 states. [2020-12-23 06:59:26,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:26,515 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-12-23 06:59:26,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 06:59:26,516 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 44 [2020-12-23 06:59:26,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:26,516 INFO L225 Difference]: With dead ends: 49 [2020-12-23 06:59:26,517 INFO L226 Difference]: Without dead ends: 46 [2020-12-23 06:59:26,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=83, Invalid=1639, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 06:59:26,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-23 06:59:26,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-23 06:59:26,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 06:59:26,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2020-12-23 06:59:26,524 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2020-12-23 06:59:26,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:26,524 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2020-12-23 06:59:26,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 06:59:26,524 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2020-12-23 06:59:26,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-23 06:59:26,525 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:26,525 INFO L422 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:26,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 06:59:26,727 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:26,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:26,727 INFO L82 PathProgramCache]: Analyzing trace with hash 49071435, now seen corresponding path program 38 times [2020-12-23 06:59:26,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:26,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832585795] [2020-12-23 06:59:26,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:26,740 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:59:26,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1237071702] [2020-12-23 06:59:26,740 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 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 06:59:26,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:59:26,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:26,843 WARN L261 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 163 conjunts are in the unsatisfiable core [2020-12-23 06:59:26,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:28,423 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:59:28,499 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:28,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832585795] [2020-12-23 06:59:28,500 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:59:28,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237071702] [2020-12-23 06:59:28,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:59:28,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-12-23 06:59:28,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737281044] [2020-12-23 06:59:28,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-23 06:59:28,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:28,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-23 06:59:28,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 06:59:28,502 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 42 states. [2020-12-23 06:59:30,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:30,666 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-12-23 06:59:30,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 06:59:30,667 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 45 [2020-12-23 06:59:30,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:30,668 INFO L225 Difference]: With dead ends: 50 [2020-12-23 06:59:30,668 INFO L226 Difference]: Without dead ends: 47 [2020-12-23 06:59:30,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=85, Invalid=1721, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 06:59:30,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-23 06:59:30,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-12-23 06:59:30,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 06:59:30,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-12-23 06:59:30,674 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2020-12-23 06:59:30,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:30,675 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-12-23 06:59:30,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-23 06:59:30,675 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-12-23 06:59:30,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 06:59:30,675 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:30,675 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:30,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 06:59:30,887 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:30,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:30,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1521152011, now seen corresponding path program 39 times [2020-12-23 06:59:30,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:30,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477897904] [2020-12-23 06:59:30,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:30,899 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:59:30,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [772173716] [2020-12-23 06:59:30,900 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 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 06:59:31,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2020-12-23 06:59:31,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:31,987 WARN L261 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 167 conjunts are in the unsatisfiable core [2020-12-23 06:59:31,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:33,721 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:59:33,803 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:33,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477897904] [2020-12-23 06:59:33,803 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:59:33,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772173716] [2020-12-23 06:59:33,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:59:33,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-12-23 06:59:33,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062006120] [2020-12-23 06:59:33,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 06:59:33,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:33,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 06:59:33,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 06:59:33,805 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 43 states. [2020-12-23 06:59:36,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:36,074 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-12-23 06:59:36,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-23 06:59:36,075 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 46 [2020-12-23 06:59:36,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:36,075 INFO L225 Difference]: With dead ends: 51 [2020-12-23 06:59:36,075 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 06:59:36,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=87, Invalid=1805, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 06:59:36,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 06:59:36,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-12-23 06:59:36,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 06:59:36,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-12-23 06:59:36,083 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2020-12-23 06:59:36,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:36,083 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-12-23 06:59:36,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 06:59:36,084 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-12-23 06:59:36,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 06:59:36,084 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:36,084 INFO L422 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:36,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 06:59:36,292 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:36,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:36,292 INFO L82 PathProgramCache]: Analyzing trace with hash -88990389, now seen corresponding path program 40 times [2020-12-23 06:59:36,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:36,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769566097] [2020-12-23 06:59:36,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:36,303 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:59:36,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [541593084] [2020-12-23 06:59:36,304 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 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 06:59:36,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:59:36,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:36,394 WARN L261 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 171 conjunts are in the unsatisfiable core [2020-12-23 06:59:36,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:38,153 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:59:38,227 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:38,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769566097] [2020-12-23 06:59:38,227 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:59:38,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541593084] [2020-12-23 06:59:38,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:59:38,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-12-23 06:59:38,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503999981] [2020-12-23 06:59:38,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-23 06:59:38,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:38,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-23 06:59:38,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 06:59:38,229 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 44 states. [2020-12-23 06:59:40,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:40,609 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-12-23 06:59:40,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-23 06:59:40,610 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 47 [2020-12-23 06:59:40,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:40,610 INFO L225 Difference]: With dead ends: 52 [2020-12-23 06:59:40,610 INFO L226 Difference]: Without dead ends: 49 [2020-12-23 06:59:40,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=89, Invalid=1891, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 06:59:40,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-23 06:59:40,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-12-23 06:59:40,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-23 06:59:40,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-12-23 06:59:40,616 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2020-12-23 06:59:40,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:40,616 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-12-23 06:59:40,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-23 06:59:40,616 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-12-23 06:59:40,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-23 06:59:40,617 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:40,617 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:40,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:40,832 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:40,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:40,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1536202763, now seen corresponding path program 41 times [2020-12-23 06:59:40,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:40,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749645409] [2020-12-23 06:59:40,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:40,846 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:59:40,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1104010427] [2020-12-23 06:59:40,846 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 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 06:59:40,932 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2020-12-23 06:59:40,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:40,937 WARN L261 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 175 conjunts are in the unsatisfiable core [2020-12-23 06:59:40,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:42,765 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:59:42,861 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:42,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749645409] [2020-12-23 06:59:42,862 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:59:42,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104010427] [2020-12-23 06:59:42,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:59:42,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-12-23 06:59:42,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355804713] [2020-12-23 06:59:42,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-23 06:59:42,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:42,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-23 06:59:42,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 06:59:42,863 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 45 states. [2020-12-23 06:59:45,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:45,495 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2020-12-23 06:59:45,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-23 06:59:45,495 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 48 [2020-12-23 06:59:45,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:45,496 INFO L225 Difference]: With dead ends: 53 [2020-12-23 06:59:45,496 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 06:59:45,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=91, Invalid=1979, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 06:59:45,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 06:59:45,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-12-23 06:59:45,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-23 06:59:45,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2020-12-23 06:59:45,502 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2020-12-23 06:59:45,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:45,502 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2020-12-23 06:59:45,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-23 06:59:45,502 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2020-12-23 06:59:45,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 06:59:45,503 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:45,503 INFO L422 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:45,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:45,703 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:45,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:45,704 INFO L82 PathProgramCache]: Analyzing trace with hash 377582923, now seen corresponding path program 42 times [2020-12-23 06:59:45,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:45,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999185799] [2020-12-23 06:59:45,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:45,717 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:59:45,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1521988026] [2020-12-23 06:59:45,717 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 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 06:59:46,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2020-12-23 06:59:46,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:46,977 WARN L261 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 180 conjunts are in the unsatisfiable core [2020-12-23 06:59:46,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:49,230 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:59:49,283 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:49,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999185799] [2020-12-23 06:59:49,284 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:59:49,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521988026] [2020-12-23 06:59:49,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:59:49,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-12-23 06:59:49,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821835047] [2020-12-23 06:59:49,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-23 06:59:49,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:49,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-23 06:59:49,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2028, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 06:59:49,285 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 47 states. [2020-12-23 06:59:52,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:52,068 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-12-23 06:59:52,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-23 06:59:52,069 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 49 [2020-12-23 06:59:52,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:52,070 INFO L225 Difference]: With dead ends: 54 [2020-12-23 06:59:52,070 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 06:59:52,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=139, Invalid=2117, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 06:59:52,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 06:59:52,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-12-23 06:59:52,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 06:59:52,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-12-23 06:59:52,076 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2020-12-23 06:59:52,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:52,077 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-12-23 06:59:52,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-23 06:59:52,077 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-12-23 06:59:52,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-23 06:59:52,077 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:52,077 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:52,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:52,278 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:52,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:52,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1179893749, now seen corresponding path program 43 times [2020-12-23 06:59:52,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:52,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241562414] [2020-12-23 06:59:52,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:52,290 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:59:52,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [24990887] [2020-12-23 06:59:52,290 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 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 06:59:52,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:59:52,371 WARN L261 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 183 conjunts are in the unsatisfiable core [2020-12-23 06:59:52,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:54,377 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:59:54,468 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:54,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241562414] [2020-12-23 06:59:54,468 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:59:54,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24990887] [2020-12-23 06:59:54,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:59:54,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-12-23 06:59:54,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249218982] [2020-12-23 06:59:54,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-23 06:59:54,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:54,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-23 06:59:54,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 06:59:54,470 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 47 states. [2020-12-23 06:59:57,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:57,778 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2020-12-23 06:59:57,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-23 06:59:57,779 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 50 [2020-12-23 06:59:57,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:57,779 INFO L225 Difference]: With dead ends: 55 [2020-12-23 06:59:57,779 INFO L226 Difference]: Without dead ends: 52 [2020-12-23 06:59:57,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=95, Invalid=2161, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 06:59:57,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-23 06:59:57,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-12-23 06:59:57,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 06:59:57,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-12-23 06:59:57,786 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2020-12-23 06:59:57,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:57,787 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-12-23 06:59:57,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-23 06:59:57,787 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-12-23 06:59:57,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 06:59:57,787 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:57,787 INFO L422 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:58,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-12-23 06:59:58,002 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:58,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:58,002 INFO L82 PathProgramCache]: Analyzing trace with hash 2077936971, now seen corresponding path program 44 times [2020-12-23 06:59:58,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:58,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106064759] [2020-12-23 06:59:58,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:58,015 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:59:58,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [932543599] [2020-12-23 06:59:58,015 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 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 06:59:58,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:59:58,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:58,139 WARN L261 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 187 conjunts are in the unsatisfiable core [2020-12-23 06:59:58,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:00:00,309 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:00:00,405 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 07:00:00,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106064759] [2020-12-23 07:00:00,406 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:00:00,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932543599] [2020-12-23 07:00:00,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:00:00,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-12-23 07:00:00,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849807695] [2020-12-23 07:00:00,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-23 07:00:00,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:00:00,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-23 07:00:00,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 07:00:00,407 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 48 states. [2020-12-23 07:00:03,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:00:03,842 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-12-23 07:00:03,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-23 07:00:03,843 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 51 [2020-12-23 07:00:03,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:00:03,844 INFO L225 Difference]: With dead ends: 56 [2020-12-23 07:00:03,844 INFO L226 Difference]: Without dead ends: 53 [2020-12-23 07:00:03,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=97, Invalid=2255, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 07:00:03,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-23 07:00:03,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-12-23 07:00:03,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-23 07:00:03,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-12-23 07:00:03,850 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2020-12-23 07:00:03,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:00:03,850 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-12-23 07:00:03,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-23 07:00:03,850 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-12-23 07:00:03,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-23 07:00:03,851 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:00:03,851 INFO L422 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:00:04,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-23 07:00:04,051 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:00:04,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:00:04,052 INFO L82 PathProgramCache]: Analyzing trace with hash -8525813, now seen corresponding path program 45 times [2020-12-23 07:00:04,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:00:04,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592781792] [2020-12-23 07:00:04,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:00:04,064 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:00:04,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [499268333] [2020-12-23 07:00:04,064 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 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 07:00:04,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2020-12-23 07:00:04,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:00:04,885 WARN L261 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 191 conjunts are in the unsatisfiable core [2020-12-23 07:00:04,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:00:07,108 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:00:07,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:00:07,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592781792] [2020-12-23 07:00:07,203 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:00:07,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499268333] [2020-12-23 07:00:07,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:00:07,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-12-23 07:00:07,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190256222] [2020-12-23 07:00:07,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-23 07:00:07,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:00:07,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-23 07:00:07,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 07:00:07,205 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 49 states. [2020-12-23 07:00:10,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:00:10,459 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2020-12-23 07:00:10,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-23 07:00:10,460 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 52 [2020-12-23 07:00:10,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:00:10,460 INFO L225 Difference]: With dead ends: 57 [2020-12-23 07:00:10,460 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 07:00:10,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=99, Invalid=2351, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 07:00:10,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 07:00:10,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-12-23 07:00:10,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 07:00:10,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-12-23 07:00:10,467 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2020-12-23 07:00:10,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:00:10,468 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-12-23 07:00:10,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-23 07:00:10,468 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-12-23 07:00:10,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-23 07:00:10,468 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:00:10,468 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:00:10,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-23 07:00:10,673 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:00:10,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:00:10,673 INFO L82 PathProgramCache]: Analyzing trace with hash -264362677, now seen corresponding path program 46 times [2020-12-23 07:00:10,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:00:10,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396067969] [2020-12-23 07:00:10,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:00:10,687 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:00:10,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [609259760] [2020-12-23 07:00:10,687 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 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 07:00:10,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:00:10,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:00:10,782 WARN L261 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 195 conjunts are in the unsatisfiable core [2020-12-23 07:00:10,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:00:13,034 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:00:13,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:00:13,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396067969] [2020-12-23 07:00:13,122 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:00:13,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609259760] [2020-12-23 07:00:13,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:00:13,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-12-23 07:00:13,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603792568] [2020-12-23 07:00:13,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-23 07:00:13,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:00:13,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-23 07:00:13,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 07:00:13,124 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 50 states. [2020-12-23 07:00:16,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:00:16,681 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-12-23 07:00:16,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-23 07:00:16,682 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 53 [2020-12-23 07:00:16,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:00:16,682 INFO L225 Difference]: With dead ends: 58 [2020-12-23 07:00:16,683 INFO L226 Difference]: Without dead ends: 55 [2020-12-23 07:00:16,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=101, Invalid=2449, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 07:00:16,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-23 07:00:16,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-12-23 07:00:16,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-23 07:00:16,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-12-23 07:00:16,688 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2020-12-23 07:00:16,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:00:16,688 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-12-23 07:00:16,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-23 07:00:16,688 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-12-23 07:00:16,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-23 07:00:16,688 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:00:16,688 INFO L422 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:00:16,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:00:16,889 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:00:16,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:00:16,890 INFO L82 PathProgramCache]: Analyzing trace with hash 394629131, now seen corresponding path program 47 times [2020-12-23 07:00:16,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:00:16,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045711059] [2020-12-23 07:00:16,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:00:16,903 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:00:16,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1428669204] [2020-12-23 07:00:16,903 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 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 07:00:17,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2020-12-23 07:00:17,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:00:17,009 WARN L261 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 199 conjunts are in the unsatisfiable core [2020-12-23 07:00:17,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:00:19,684 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:00:19,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:00:19,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045711059] [2020-12-23 07:00:19,796 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:00:19,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428669204] [2020-12-23 07:00:19,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:00:19,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-12-23 07:00:19,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622112498] [2020-12-23 07:00:19,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-23 07:00:19,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:00:19,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-23 07:00:19,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 07:00:19,797 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 51 states. [2020-12-23 07:00:24,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:00:24,150 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2020-12-23 07:00:24,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-23 07:00:24,151 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 54 [2020-12-23 07:00:24,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:00:24,152 INFO L225 Difference]: With dead ends: 59 [2020-12-23 07:00:24,152 INFO L226 Difference]: Without dead ends: 56 [2020-12-23 07:00:24,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=103, Invalid=2549, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 07:00:24,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-23 07:00:24,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-12-23 07:00:24,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-23 07:00:24,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2020-12-23 07:00:24,158 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2020-12-23 07:00:24,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:00:24,158 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2020-12-23 07:00:24,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-23 07:00:24,159 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2020-12-23 07:00:24,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-23 07:00:24,159 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:00:24,159 INFO L422 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:00:24,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-23 07:00:24,360 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:00:24,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:00:24,360 INFO L82 PathProgramCache]: Analyzing trace with hash -651461301, now seen corresponding path program 48 times [2020-12-23 07:00:24,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:00:24,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904586225] [2020-12-23 07:00:24,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:00:24,372 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:00:24,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [627315858] [2020-12-23 07:00:24,373 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 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 07:00:25,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-23 07:00:25,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:00:25,671 WARN L261 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 204 conjunts are in the unsatisfiable core [2020-12-23 07:00:25,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:00:28,730 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:00:28,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:00:28,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904586225] [2020-12-23 07:00:28,797 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:00:28,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627315858] [2020-12-23 07:00:28,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:00:28,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-12-23 07:00:28,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679307896] [2020-12-23 07:00:28,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-23 07:00:28,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:00:28,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-23 07:00:28,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=2604, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 07:00:28,798 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 53 states. [2020-12-23 07:00:33,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:00:33,591 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-12-23 07:00:33,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-23 07:00:33,592 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 55 [2020-12-23 07:00:33,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:00:33,592 INFO L225 Difference]: With dead ends: 60 [2020-12-23 07:00:33,592 INFO L226 Difference]: Without dead ends: 57 [2020-12-23 07:00:33,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=157, Invalid=2705, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 07:00:33,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-23 07:00:33,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-12-23 07:00:33,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 07:00:33,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-12-23 07:00:33,598 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2020-12-23 07:00:33,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:00:33,598 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-12-23 07:00:33,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-23 07:00:33,598 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-12-23 07:00:33,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-23 07:00:33,598 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:00:33,599 INFO L422 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:00:33,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-23 07:00:33,799 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:00:33,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:00:33,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1279473675, now seen corresponding path program 49 times [2020-12-23 07:00:33,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:00:33,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672515573] [2020-12-23 07:00:33,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:00:33,811 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:00:33,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [43394445] [2020-12-23 07:00:33,812 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 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 07:00:33,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:00:33,916 WARN L261 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 207 conjunts are in the unsatisfiable core [2020-12-23 07:00:33,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:00:36,766 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:00:36,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:00:36,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672515573] [2020-12-23 07:00:36,880 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:00:36,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43394445] [2020-12-23 07:00:36,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:00:36,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-12-23 07:00:36,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423620411] [2020-12-23 07:00:36,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-23 07:00:36,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:00:36,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-23 07:00:36,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 07:00:36,882 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 53 states. [2020-12-23 07:00:42,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:00:42,710 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2020-12-23 07:00:42,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-23 07:00:42,711 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 56 [2020-12-23 07:00:42,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:00:42,712 INFO L225 Difference]: With dead ends: 61 [2020-12-23 07:00:42,712 INFO L226 Difference]: Without dead ends: 58 [2020-12-23 07:00:42,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=107, Invalid=2755, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 07:00:42,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-23 07:00:42,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-12-23 07:00:42,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-23 07:00:42,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2020-12-23 07:00:42,720 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2020-12-23 07:00:42,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:00:42,721 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2020-12-23 07:00:42,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-23 07:00:42,721 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2020-12-23 07:00:42,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-23 07:00:42,721 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:00:42,721 INFO L422 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:00:42,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-23 07:00:42,922 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:00:42,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:00:42,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1008915787, now seen corresponding path program 50 times [2020-12-23 07:00:42,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:00:42,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334570103] [2020-12-23 07:00:42,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:00:42,935 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:00:42,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [610463469] [2020-12-23 07:00:42,936 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 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 07:00:43,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:00:43,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:00:43,051 WARN L261 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 211 conjunts are in the unsatisfiable core [2020-12-23 07:00:43,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:00:45,939 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:00:46,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:00:46,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334570103] [2020-12-23 07:00:46,056 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:00:46,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610463469] [2020-12-23 07:00:46,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:00:46,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-12-23 07:00:46,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575555443] [2020-12-23 07:00:46,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-23 07:00:46,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:00:46,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-23 07:00:46,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 07:00:46,058 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 54 states. [2020-12-23 07:00:51,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:00:51,667 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-12-23 07:00:51,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-23 07:00:51,668 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 57 [2020-12-23 07:00:51,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:00:51,669 INFO L225 Difference]: With dead ends: 62 [2020-12-23 07:00:51,669 INFO L226 Difference]: Without dead ends: 59 [2020-12-23 07:00:51,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=109, Invalid=2861, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 07:00:51,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-23 07:00:51,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-12-23 07:00:51,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-23 07:00:51,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-12-23 07:00:51,677 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2020-12-23 07:00:51,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:00:51,677 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-12-23 07:00:51,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-23 07:00:51,677 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-12-23 07:00:51,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-23 07:00:51,678 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:00:51,678 INFO L422 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:00:51,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-12-23 07:00:51,893 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:00:51,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:00:51,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1211555851, now seen corresponding path program 51 times [2020-12-23 07:00:51,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:00:51,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770235224] [2020-12-23 07:00:51,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:00:51,907 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:00:51,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1491356161] [2020-12-23 07:00:51,907 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 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 07:00:54,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2020-12-23 07:00:54,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:00:54,241 WARN L261 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 215 conjunts are in the unsatisfiable core [2020-12-23 07:00:54,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:00:57,378 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:00:57,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:00:57,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770235224] [2020-12-23 07:00:57,507 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:00:57,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491356161] [2020-12-23 07:00:57,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:00:57,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-12-23 07:00:57,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103997869] [2020-12-23 07:00:57,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-23 07:00:57,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:00:57,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-23 07:00:57,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 07:00:57,509 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 55 states. [2020-12-23 07:01:04,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:01:04,004 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2020-12-23 07:01:04,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-23 07:01:04,005 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 58 [2020-12-23 07:01:04,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:01:04,006 INFO L225 Difference]: With dead ends: 63 [2020-12-23 07:01:04,006 INFO L226 Difference]: Without dead ends: 60 [2020-12-23 07:01:04,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=111, Invalid=2969, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 07:01:04,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-23 07:01:04,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-12-23 07:01:04,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-23 07:01:04,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2020-12-23 07:01:04,013 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2020-12-23 07:01:04,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:01:04,014 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2020-12-23 07:01:04,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-23 07:01:04,014 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2020-12-23 07:01:04,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-23 07:01:04,014 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:04,014 INFO L422 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:01:04,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:01:04,218 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:04,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:04,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1096536757, now seen corresponding path program 52 times [2020-12-23 07:01:04,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:04,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763949178] [2020-12-23 07:01:04,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:04,234 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:01:04,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [660598705] [2020-12-23 07:01:04,235 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 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 07:01:04,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:01:04,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:01:04,348 WARN L261 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 219 conjunts are in the unsatisfiable core [2020-12-23 07:01:04,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:01:08,277 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:01:08,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:01:08,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763949178] [2020-12-23 07:01:08,451 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:01:08,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660598705] [2020-12-23 07:01:08,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:01:08,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-12-23 07:01:08,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260651985] [2020-12-23 07:01:08,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-23 07:01:08,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:01:08,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-23 07:01:08,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 07:01:08,452 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 56 states. [2020-12-23 07:01:16,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:01:16,864 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-12-23 07:01:16,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-23 07:01:16,865 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 59 [2020-12-23 07:01:16,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:01:16,866 INFO L225 Difference]: With dead ends: 64 [2020-12-23 07:01:16,866 INFO L226 Difference]: Without dead ends: 61 [2020-12-23 07:01:16,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=113, Invalid=3079, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 07:01:16,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-23 07:01:16,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-12-23 07:01:16,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-23 07:01:16,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2020-12-23 07:01:16,874 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2020-12-23 07:01:16,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:01:16,874 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2020-12-23 07:01:16,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-23 07:01:16,874 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2020-12-23 07:01:16,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-23 07:01:16,875 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:16,875 INFO L422 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:01:17,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-12-23 07:01:17,085 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:17,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:17,086 INFO L82 PathProgramCache]: Analyzing trace with hash 367036427, now seen corresponding path program 53 times [2020-12-23 07:01:17,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:17,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030563616] [2020-12-23 07:01:17,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:17,096 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:01:17,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2007159855] [2020-12-23 07:01:17,097 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 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 07:01:17,205 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2020-12-23 07:01:17,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:01:17,209 WARN L261 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 223 conjunts are in the unsatisfiable core [2020-12-23 07:01:17,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:01:20,760 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:01:20,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:01:20,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030563616] [2020-12-23 07:01:20,907 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:01:20,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007159855] [2020-12-23 07:01:20,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:01:20,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-12-23 07:01:20,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801886656] [2020-12-23 07:01:20,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-23 07:01:20,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:01:20,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-23 07:01:20,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 07:01:20,909 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 57 states. [2020-12-23 07:01:28,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:01:28,670 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2020-12-23 07:01:28,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-23 07:01:28,671 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 60 [2020-12-23 07:01:28,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:01:28,672 INFO L225 Difference]: With dead ends: 65 [2020-12-23 07:01:28,672 INFO L226 Difference]: Without dead ends: 62 [2020-12-23 07:01:28,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=115, Invalid=3191, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 07:01:28,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-23 07:01:28,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-12-23 07:01:28,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-23 07:01:28,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-12-23 07:01:28,680 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2020-12-23 07:01:28,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:01:28,680 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-12-23 07:01:28,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-23 07:01:28,680 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-12-23 07:01:28,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-23 07:01:28,680 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:28,681 INFO L422 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:01:28,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-12-23 07:01:28,881 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:28,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:28,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1506835125, now seen corresponding path program 54 times [2020-12-23 07:01:28,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:28,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092698179] [2020-12-23 07:01:28,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:28,893 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:01:28,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [48421337] [2020-12-23 07:01:28,894 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 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 07:01:30,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2020-12-23 07:01:30,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:01:30,232 WARN L261 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 228 conjunts are in the unsatisfiable core [2020-12-23 07:01:30,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:01:34,644 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:01:34,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:01:34,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092698179] [2020-12-23 07:01:34,720 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:01:34,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48421337] [2020-12-23 07:01:34,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:01:34,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-12-23 07:01:34,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510288350] [2020-12-23 07:01:34,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-12-23 07:01:34,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:01:34,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-12-23 07:01:34,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=3252, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 07:01:34,722 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 59 states. [2020-12-23 07:01:42,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:01:42,660 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-12-23 07:01:42,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-12-23 07:01:42,661 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 61 [2020-12-23 07:01:42,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:01:42,662 INFO L225 Difference]: With dead ends: 66 [2020-12-23 07:01:42,662 INFO L226 Difference]: Without dead ends: 63 [2020-12-23 07:01:42,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=175, Invalid=3365, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 07:01:42,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-23 07:01:42,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-12-23 07:01:42,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-23 07:01:42,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2020-12-23 07:01:42,670 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2020-12-23 07:01:42,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:01:42,671 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2020-12-23 07:01:42,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-12-23 07:01:42,671 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2020-12-23 07:01:42,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-23 07:01:42,671 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:42,671 INFO L422 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:01:42,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:01:42,882 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:42,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:42,883 INFO L82 PathProgramCache]: Analyzing trace with hash 532688907, now seen corresponding path program 55 times [2020-12-23 07:01:42,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:42,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819413487] [2020-12-23 07:01:42,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:42,897 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:01:42,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [645373304] [2020-12-23 07:01:42,898 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 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 07:01:43,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:43,039 WARN L261 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 231 conjunts are in the unsatisfiable core [2020-12-23 07:01:43,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:01:46,588 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:01:46,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:01:46,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819413487] [2020-12-23 07:01:46,709 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:01:46,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645373304] [2020-12-23 07:01:46,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:01:46,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-12-23 07:01:46,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698637463] [2020-12-23 07:01:46,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-12-23 07:01:46,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:01:46,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-12-23 07:01:46,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 07:01:46,710 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 59 states. [2020-12-23 07:01:56,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:01:56,033 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2020-12-23 07:01:56,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-12-23 07:01:56,034 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 62 [2020-12-23 07:01:56,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:01:56,035 INFO L225 Difference]: With dead ends: 67 [2020-12-23 07:01:56,035 INFO L226 Difference]: Without dead ends: 64 [2020-12-23 07:01:56,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=119, Invalid=3421, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 07:01:56,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-23 07:01:56,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-12-23 07:01:56,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 07:01:56,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2020-12-23 07:01:56,042 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2020-12-23 07:01:56,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:01:56,042 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2020-12-23 07:01:56,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-12-23 07:01:56,042 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2020-12-23 07:01:56,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-23 07:01:56,043 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:56,043 INFO L422 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:01:56,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-12-23 07:01:56,243 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:56,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:56,244 INFO L82 PathProgramCache]: Analyzing trace with hash -666575541, now seen corresponding path program 56 times [2020-12-23 07:01:56,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:56,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991797797] [2020-12-23 07:01:56,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:56,256 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:01:56,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1611542959] [2020-12-23 07:01:56,256 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 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 07:01:56,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:01:56,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:01:56,417 WARN L261 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 235 conjunts are in the unsatisfiable core [2020-12-23 07:01:56,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:01:59,907 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:02:00,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:02:00,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991797797] [2020-12-23 07:02:00,039 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:02:00,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611542959] [2020-12-23 07:02:00,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:02:00,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-12-23 07:02:00,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111007439] [2020-12-23 07:02:00,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-23 07:02:00,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:02:00,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-23 07:02:00,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 07:02:00,040 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 60 states. [2020-12-23 07:02:08,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:02:08,592 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-12-23 07:02:08,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-12-23 07:02:08,593 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 63 [2020-12-23 07:02:08,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:02:08,594 INFO L225 Difference]: With dead ends: 68 [2020-12-23 07:02:08,594 INFO L226 Difference]: Without dead ends: 65 [2020-12-23 07:02:08,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=121, Invalid=3539, Unknown=0, NotChecked=0, Total=3660 [2020-12-23 07:02:08,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-23 07:02:08,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-12-23 07:02:08,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-23 07:02:08,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2020-12-23 07:02:08,600 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2020-12-23 07:02:08,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:02:08,600 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2020-12-23 07:02:08,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-23 07:02:08,601 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2020-12-23 07:02:08,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-23 07:02:08,601 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:02:08,601 INFO L422 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:02:08,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:02:08,811 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:02:08,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:02:08,812 INFO L82 PathProgramCache]: Analyzing trace with hash 810932235, now seen corresponding path program 57 times [2020-12-23 07:02:08,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:02:08,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282366114] [2020-12-23 07:02:08,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:02:08,824 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:02:08,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1094123453] [2020-12-23 07:02:08,824 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 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 07:02:09,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2020-12-23 07:02:09,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:02:09,934 WARN L261 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 240 conjunts are in the unsatisfiable core [2020-12-23 07:02:09,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:02:14,355 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:02:14,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:02:14,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282366114] [2020-12-23 07:02:14,427 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:02:14,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094123453] [2020-12-23 07:02:14,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:02:14,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-12-23 07:02:14,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937723086] [2020-12-23 07:02:14,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-12-23 07:02:14,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:02:14,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-12-23 07:02:14,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=3603, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 07:02:14,428 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 62 states. [2020-12-23 07:02:24,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:02:24,014 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2020-12-23 07:02:24,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-23 07:02:24,015 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 64 [2020-12-23 07:02:24,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:02:24,016 INFO L225 Difference]: With dead ends: 69 [2020-12-23 07:02:24,016 INFO L226 Difference]: Without dead ends: 66 [2020-12-23 07:02:24,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=184, Invalid=3722, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 07:02:24,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-23 07:02:24,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-12-23 07:02:24,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-23 07:02:24,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2020-12-23 07:02:24,024 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2020-12-23 07:02:24,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:02:24,024 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2020-12-23 07:02:24,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-12-23 07:02:24,024 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2020-12-23 07:02:24,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-23 07:02:24,024 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:02:24,025 INFO L422 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:02:24,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-12-23 07:02:24,225 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:02:24,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:02:24,226 INFO L82 PathProgramCache]: Analyzing trace with hash -630966965, now seen corresponding path program 58 times [2020-12-23 07:02:24,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:02:24,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282151172] [2020-12-23 07:02:24,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:02:24,238 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:02:24,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [42286019] [2020-12-23 07:02:24,239 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 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 07:02:24,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:02:24,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:02:24,352 WARN L261 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 243 conjunts are in the unsatisfiable core [2020-12-23 07:02:24,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:02:28,688 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:02:28,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:02:28,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282151172] [2020-12-23 07:02:28,838 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:02:28,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42286019] [2020-12-23 07:02:28,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:02:28,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-12-23 07:02:28,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315331608] [2020-12-23 07:02:28,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-12-23 07:02:28,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:02:28,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-12-23 07:02:28,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 07:02:28,839 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 62 states. [2020-12-23 07:02:38,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:02:38,520 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-12-23 07:02:38,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-23 07:02:38,521 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 65 [2020-12-23 07:02:38,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:02:38,522 INFO L225 Difference]: With dead ends: 70 [2020-12-23 07:02:38,522 INFO L226 Difference]: Without dead ends: 67 [2020-12-23 07:02:38,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=125, Invalid=3781, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 07:02:38,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-23 07:02:38,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-12-23 07:02:38,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-23 07:02:38,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-12-23 07:02:38,529 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2020-12-23 07:02:38,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:02:38,529 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-12-23 07:02:38,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-12-23 07:02:38,529 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-12-23 07:02:38,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-23 07:02:38,529 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:02:38,529 INFO L422 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:02:38,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-12-23 07:02:38,730 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:02:38,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:02:38,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1914798091, now seen corresponding path program 59 times [2020-12-23 07:02:38,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:02:38,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902967210] [2020-12-23 07:02:38,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:02:38,743 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:02:38,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2116110752] [2020-12-23 07:02:38,744 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 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 07:02:38,865 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2020-12-23 07:02:38,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:02:38,872 WARN L261 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 247 conjunts are in the unsatisfiable core [2020-12-23 07:02:38,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:02:42,848 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:02:42,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:02:42,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902967210] [2020-12-23 07:02:42,990 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:02:42,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116110752] [2020-12-23 07:02:42,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:02:42,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-12-23 07:02:42,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283209438] [2020-12-23 07:02:42,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-23 07:02:42,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:02:42,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-23 07:02:42,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 07:02:42,992 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 63 states.