/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/array-programs/partial_mod_count_3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:28:47,512 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:28:47,515 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:28:47,562 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:28:47,563 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:28:47,565 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:28:47,567 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:28:47,569 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:28:47,572 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:28:47,573 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:28:47,574 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:28:47,576 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 10:28:47,577 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:28:47,578 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:28:47,579 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:28:47,581 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:28:47,582 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:28:47,583 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:28:47,585 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:28:47,588 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:28:47,590 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:28:47,592 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:28:47,593 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:28:47,594 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:28:47,598 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 10:28:47,633 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:28:47,635 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:28:47,636 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:28:47,637 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 10:28:47,670 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:28:47,671 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:28:47,675 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:28:47,675 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:28:47,676 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:28:47,676 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:28:47,677 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:28:47,677 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:28:47,680 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:28:47,680 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:28:47,680 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:28:47,681 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:28:47,681 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:28:47,682 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:28:47,683 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:28:47,683 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:28:47,683 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:28:47,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:28:47,684 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:28:47,684 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:28:47,684 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:28:47,685 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:28:47,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:28:47,686 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:28:47,686 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:28:47,686 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:28:48,133 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:28:48,175 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:28:48,178 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:28:48,180 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:28:48,181 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:28:48,182 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/partial_mod_count_3.c [2021-01-06 10:28:48,276 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/8e471ebd8/c00c77d16639403e845a0f81cb2a522c/FLAG42197b8e6 [2021-01-06 10:28:48,910 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:28:48,911 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_3.c [2021-01-06 10:28:48,918 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/8e471ebd8/c00c77d16639403e845a0f81cb2a522c/FLAG42197b8e6 [2021-01-06 10:28:49,253 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/8e471ebd8/c00c77d16639403e845a0f81cb2a522c [2021-01-06 10:28:49,257 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:28:49,259 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:28:49,261 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:28:49,261 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:28:49,266 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:28:49,267 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:28:49" (1/1) ... [2021-01-06 10:28:49,268 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57ffc2a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:49, skipping insertion in model container [2021-01-06 10:28:49,268 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:28:49" (1/1) ... [2021-01-06 10:28:49,277 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:28:49,293 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 10:28:49,446 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/array-programs/partial_mod_count_3.c[323,336] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 10:28:49,468 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:28:49,478 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 10:28:49,493 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/array-programs/partial_mod_count_3.c[323,336] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 10:28:49,501 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:28:49,519 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:28:49,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:49 WrapperNode [2021-01-06 10:28:49,520 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:28:49,521 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:28:49,521 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:28:49,522 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:28:49,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:49" (1/1) ... [2021-01-06 10:28:49,540 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:49" (1/1) ... [2021-01-06 10:28:49,567 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:28:49,568 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:28:49,568 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:28:49,568 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:28:49,579 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:49" (1/1) ... [2021-01-06 10:28:49,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:49" (1/1) ... [2021-01-06 10:28:49,582 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:49" (1/1) ... [2021-01-06 10:28:49,583 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:49" (1/1) ... [2021-01-06 10:28:49,589 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:49" (1/1) ... [2021-01-06 10:28:49,594 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:49" (1/1) ... [2021-01-06 10:28:49,596 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:49" (1/1) ... [2021-01-06 10:28:49,598 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:28:49,600 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:28:49,600 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:28:49,600 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:28:49,601 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:49" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:28:49,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:28:49,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:28:49,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:28:49,732 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:28:49,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:28:49,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:28:49,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 10:28:50,107 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:28:50,107 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-01-06 10:28:50,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:28:50 BoogieIcfgContainer [2021-01-06 10:28:50,109 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:28:50,111 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:28:50,111 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:28:50,115 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:28:50,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:28:49" (1/3) ... [2021-01-06 10:28:50,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dcfa611 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:28:50, skipping insertion in model container [2021-01-06 10:28:50,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:49" (2/3) ... [2021-01-06 10:28:50,117 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dcfa611 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:28:50, skipping insertion in model container [2021-01-06 10:28:50,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:28:50" (3/3) ... [2021-01-06 10:28:50,119 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_3.c [2021-01-06 10:28:50,126 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:28:50,132 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:28:50,154 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:28:50,185 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:28:50,186 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:28:50,186 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:28:50,186 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:28:50,186 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:28:50,186 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:28:50,187 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:28:50,187 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:28:50,203 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2021-01-06 10:28:50,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 10:28:50,209 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:50,210 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:50,211 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:50,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:50,219 INFO L82 PathProgramCache]: Analyzing trace with hash -694175938, now seen corresponding path program 1 times [2021-01-06 10:28:50,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:50,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842361920] [2021-01-06 10:28:50,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:50,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:50,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:28:50,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842361920] [2021-01-06 10:28:50,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:28:50,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 10:28:50,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842844611] [2021-01-06 10:28:50,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 10:28:50,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:50,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 10:28:50,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:28:50,584 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2021-01-06 10:28:50,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:50,605 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2021-01-06 10:28:50,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 10:28:50,607 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2021-01-06 10:28:50,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:50,618 INFO L225 Difference]: With dead ends: 29 [2021-01-06 10:28:50,618 INFO L226 Difference]: Without dead ends: 13 [2021-01-06 10:28:50,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:28:50,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-01-06 10:28:50,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-01-06 10:28:50,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-01-06 10:28:50,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2021-01-06 10:28:50,664 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 9 [2021-01-06 10:28:50,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:50,664 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2021-01-06 10:28:50,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 10:28:50,664 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2021-01-06 10:28:50,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 10:28:50,665 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:50,665 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:50,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 10:28:50,666 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:50,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:50,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1866781837, now seen corresponding path program 1 times [2021-01-06 10:28:50,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:50,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042097985] [2021-01-06 10:28:50,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:50,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:50,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:28:50,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042097985] [2021-01-06 10:28:50,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:28:50,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:28:50,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238705759] [2021-01-06 10:28:50,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:28:50,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:50,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:28:50,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:28:50,755 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand 4 states. [2021-01-06 10:28:50,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:50,821 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2021-01-06 10:28:50,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:28:50,822 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2021-01-06 10:28:50,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:50,823 INFO L225 Difference]: With dead ends: 34 [2021-01-06 10:28:50,823 INFO L226 Difference]: Without dead ends: 23 [2021-01-06 10:28:50,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:28:50,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-01-06 10:28:50,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 15. [2021-01-06 10:28:50,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 10:28:50,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2021-01-06 10:28:50,832 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 9 [2021-01-06 10:28:50,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:50,832 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2021-01-06 10:28:50,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:28:50,832 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2021-01-06 10:28:50,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 10:28:50,834 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:50,834 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:50,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 10:28:50,834 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:50,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:50,837 INFO L82 PathProgramCache]: Analyzing trace with hash 97563565, now seen corresponding path program 1 times [2021-01-06 10:28:50,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:50,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121288598] [2021-01-06 10:28:50,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:50,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:50,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:28:50,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121288598] [2021-01-06 10:28:50,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115651127] [2021-01-06 10:28:50,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:51,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:51,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:28:51,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:51,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:28:51,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:28:51,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-01-06 10:28:51,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335482346] [2021-01-06 10:28:51,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:28:51,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:51,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:28:51,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:28:51,140 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 7 states. [2021-01-06 10:28:51,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:51,213 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2021-01-06 10:28:51,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:28:51,214 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2021-01-06 10:28:51,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:51,215 INFO L225 Difference]: With dead ends: 44 [2021-01-06 10:28:51,216 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 10:28:51,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:28:51,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 10:28:51,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 18. [2021-01-06 10:28:51,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 10:28:51,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-01-06 10:28:51,223 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2021-01-06 10:28:51,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:51,223 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-01-06 10:28:51,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:28:51,224 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-01-06 10:28:51,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 10:28:51,225 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:51,225 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:51,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 10:28:51,440 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:51,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:51,441 INFO L82 PathProgramCache]: Analyzing trace with hash 982026547, now seen corresponding path program 2 times [2021-01-06 10:28:51,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:51,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285765225] [2021-01-06 10:28:51,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:51,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:51,524 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:28:51,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285765225] [2021-01-06 10:28:51,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757852631] [2021-01-06 10:28:51,525 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:51,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-01-06 10:28:51,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:51,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:28:51,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:51,664 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:28:51,680 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:28:51,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 10:28:51,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:28:51,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-01-06 10:28:51,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776480530] [2021-01-06 10:28:51,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:28:51,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:51,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:28:51,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:28:51,700 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 6 states. [2021-01-06 10:28:51,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:51,801 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2021-01-06 10:28:51,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:28:51,801 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2021-01-06 10:28:51,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:51,803 INFO L225 Difference]: With dead ends: 35 [2021-01-06 10:28:51,803 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 10:28:51,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:28:51,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 10:28:51,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2021-01-06 10:28:51,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 10:28:51,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-01-06 10:28:51,810 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 15 [2021-01-06 10:28:51,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:51,811 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-01-06 10:28:51,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:28:51,811 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-01-06 10:28:51,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 10:28:51,812 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:51,812 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:52,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:52,028 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:52,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:52,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1305492527, now seen corresponding path program 1 times [2021-01-06 10:28:52,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:52,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298066588] [2021-01-06 10:28:52,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:52,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:52,149 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:28:52,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298066588] [2021-01-06 10:28:52,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120705625] [2021-01-06 10:28:52,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:52,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:52,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:28:52,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:52,314 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:28:52,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:28:52,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-01-06 10:28:52,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966553346] [2021-01-06 10:28:52,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:28:52,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:52,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:28:52,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:28:52,319 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 9 states. [2021-01-06 10:28:52,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:52,410 INFO L93 Difference]: Finished difference Result 93 states and 111 transitions. [2021-01-06 10:28:52,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:28:52,411 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2021-01-06 10:28:52,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:52,412 INFO L225 Difference]: With dead ends: 93 [2021-01-06 10:28:52,412 INFO L226 Difference]: Without dead ends: 72 [2021-01-06 10:28:52,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:28:52,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-01-06 10:28:52,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 31. [2021-01-06 10:28:52,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 10:28:52,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2021-01-06 10:28:52,420 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 20 [2021-01-06 10:28:52,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:52,420 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2021-01-06 10:28:52,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:28:52,421 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2021-01-06 10:28:52,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 10:28:52,421 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:52,422 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:52,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:52,638 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:52,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:52,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1739926453, now seen corresponding path program 2 times [2021-01-06 10:28:52,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:52,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133243671] [2021-01-06 10:28:52,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:52,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:52,711 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:28:52,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133243671] [2021-01-06 10:28:52,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697807132] [2021-01-06 10:28:52,712 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:52,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:28:52,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:52,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:28:52,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:52,849 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:28:52,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:28:52,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-01-06 10:28:52,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645971393] [2021-01-06 10:28:52,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:28:52,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:52,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:28:52,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:28:52,852 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 11 states. [2021-01-06 10:28:52,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:52,941 INFO L93 Difference]: Finished difference Result 113 states and 134 transitions. [2021-01-06 10:28:52,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:28:52,942 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2021-01-06 10:28:52,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:52,943 INFO L225 Difference]: With dead ends: 113 [2021-01-06 10:28:52,943 INFO L226 Difference]: Without dead ends: 92 [2021-01-06 10:28:52,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:28:52,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-01-06 10:28:52,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 34. [2021-01-06 10:28:52,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 10:28:52,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-01-06 10:28:52,951 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 23 [2021-01-06 10:28:52,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:52,952 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-01-06 10:28:52,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:28:52,952 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-01-06 10:28:52,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 10:28:52,953 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:52,953 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:53,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:53,159 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:53,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:53,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1070414225, now seen corresponding path program 3 times [2021-01-06 10:28:53,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:53,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207698825] [2021-01-06 10:28:53,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:53,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:53,297 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:28:53,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207698825] [2021-01-06 10:28:53,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966148938] [2021-01-06 10:28:53,298 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:53,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 10:28:53,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:53,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:28:53,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:53,452 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-01-06 10:28:53,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:28:53,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-01-06 10:28:53,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598058947] [2021-01-06 10:28:53,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:28:53,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:53,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:28:53,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:28:53,461 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 5 states. [2021-01-06 10:28:53,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:53,537 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2021-01-06 10:28:53,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:28:53,538 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2021-01-06 10:28:53,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:53,539 INFO L225 Difference]: With dead ends: 79 [2021-01-06 10:28:53,539 INFO L226 Difference]: Without dead ends: 61 [2021-01-06 10:28:53,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:28:53,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-01-06 10:28:53,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 36. [2021-01-06 10:28:53,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 10:28:53,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-01-06 10:28:53,551 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 26 [2021-01-06 10:28:53,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:53,551 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-01-06 10:28:53,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:28:53,552 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-01-06 10:28:53,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 10:28:53,553 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:53,553 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:53,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 10:28:53,767 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:53,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:53,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1120934345, now seen corresponding path program 1 times [2021-01-06 10:28:53,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:53,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465869170] [2021-01-06 10:28:53,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:53,789 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:28:53,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1998377044] [2021-01-06 10:28:53,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:53,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:53,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:28:53,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:54,002 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:28:54,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465869170] [2021-01-06 10:28:54,003 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:28:54,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998377044] [2021-01-06 10:28:54,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:28:54,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 10:28:54,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359601812] [2021-01-06 10:28:54,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:28:54,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:54,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:28:54,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:28:54,010 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 9 states. [2021-01-06 10:28:54,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:54,144 INFO L93 Difference]: Finished difference Result 157 states and 184 transitions. [2021-01-06 10:28:54,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:28:54,145 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2021-01-06 10:28:54,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:54,147 INFO L225 Difference]: With dead ends: 157 [2021-01-06 10:28:54,147 INFO L226 Difference]: Without dead ends: 134 [2021-01-06 10:28:54,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:28:54,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-01-06 10:28:54,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 42. [2021-01-06 10:28:54,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 10:28:54,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-01-06 10:28:54,156 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 29 [2021-01-06 10:28:54,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:54,156 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-01-06 10:28:54,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:28:54,156 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-01-06 10:28:54,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 10:28:54,157 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:54,158 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:54,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:54,373 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:54,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:54,374 INFO L82 PathProgramCache]: Analyzing trace with hash -2107317257, now seen corresponding path program 2 times [2021-01-06 10:28:54,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:54,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586765033] [2021-01-06 10:28:54,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:54,389 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:28:54,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [479890677] [2021-01-06 10:28:54,390 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:54,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:28:54,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:54,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:28:54,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:54,642 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:28:54,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586765033] [2021-01-06 10:28:54,645 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:28:54,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479890677] [2021-01-06 10:28:54,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:28:54,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 10:28:54,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373536768] [2021-01-06 10:28:54,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:28:54,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:54,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:28:54,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:28:54,648 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 11 states. [2021-01-06 10:28:54,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:54,814 INFO L93 Difference]: Finished difference Result 197 states and 230 transitions. [2021-01-06 10:28:54,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:28:54,814 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2021-01-06 10:28:54,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:54,816 INFO L225 Difference]: With dead ends: 197 [2021-01-06 10:28:54,816 INFO L226 Difference]: Without dead ends: 174 [2021-01-06 10:28:54,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:28:54,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-01-06 10:28:54,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 48. [2021-01-06 10:28:54,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 10:28:54,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2021-01-06 10:28:54,844 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 35 [2021-01-06 10:28:54,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:54,844 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2021-01-06 10:28:54,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:28:54,845 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2021-01-06 10:28:54,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 10:28:54,847 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:54,847 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:55,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:55,057 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:55,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:55,058 INFO L82 PathProgramCache]: Analyzing trace with hash -975924809, now seen corresponding path program 3 times [2021-01-06 10:28:55,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:55,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466330011] [2021-01-06 10:28:55,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:55,078 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:28:55,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2102622646] [2021-01-06 10:28:55,079 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:55,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 10:28:55,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:55,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 10:28:55,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:55,279 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:28:55,284 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:28:55,299 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-01-06 10:28:55,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466330011] [2021-01-06 10:28:55,299 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:28:55,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102622646] [2021-01-06 10:28:55,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:28:55,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 10:28:55,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088567872] [2021-01-06 10:28:55,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:28:55,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:55,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:28:55,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:28:55,302 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 8 states. [2021-01-06 10:28:55,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:55,418 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2021-01-06 10:28:55,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:28:55,419 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2021-01-06 10:28:55,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:55,420 INFO L225 Difference]: With dead ends: 60 [2021-01-06 10:28:55,420 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 10:28:55,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:28:55,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 10:28:55,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2021-01-06 10:28:55,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-01-06 10:28:55,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2021-01-06 10:28:55,427 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 41 [2021-01-06 10:28:55,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:55,427 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2021-01-06 10:28:55,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:28:55,427 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2021-01-06 10:28:55,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 10:28:55,428 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:55,429 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:55,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 10:28:55,645 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:55,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:55,646 INFO L82 PathProgramCache]: Analyzing trace with hash 2047403563, now seen corresponding path program 4 times [2021-01-06 10:28:55,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:55,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758052475] [2021-01-06 10:28:55,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:55,659 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:28:55,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [694074522] [2021-01-06 10:28:55,660 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:55,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:28:55,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:55,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 10:28:55,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:56,026 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 107 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-01-06 10:28:56,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758052475] [2021-01-06 10:28:56,027 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:28:56,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694074522] [2021-01-06 10:28:56,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:28:56,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-01-06 10:28:56,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905644091] [2021-01-06 10:28:56,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:28:56,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:56,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:28:56,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=87, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:28:56,029 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 13 states. [2021-01-06 10:28:56,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:56,371 INFO L93 Difference]: Finished difference Result 211 states and 246 transitions. [2021-01-06 10:28:56,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 10:28:56,372 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2021-01-06 10:28:56,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:56,374 INFO L225 Difference]: With dead ends: 211 [2021-01-06 10:28:56,374 INFO L226 Difference]: Without dead ends: 188 [2021-01-06 10:28:56,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=114, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:28:56,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-01-06 10:28:56,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 56. [2021-01-06 10:28:56,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-01-06 10:28:56,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2021-01-06 10:28:56,383 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 46 [2021-01-06 10:28:56,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:56,383 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2021-01-06 10:28:56,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:28:56,384 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2021-01-06 10:28:56,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 10:28:56,384 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:56,385 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 8, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:56,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:56,598 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:56,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:56,599 INFO L82 PathProgramCache]: Analyzing trace with hash -520854285, now seen corresponding path program 5 times [2021-01-06 10:28:56,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:56,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882070846] [2021-01-06 10:28:56,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:56,616 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:28:56,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1304506808] [2021-01-06 10:28:56,617 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:56,882 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-01-06 10:28:56,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:56,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 10:28:56,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:57,140 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-01-06 10:28:57,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882070846] [2021-01-06 10:28:57,141 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:28:57,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304506808] [2021-01-06 10:28:57,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:28:57,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-01-06 10:28:57,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610892361] [2021-01-06 10:28:57,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 10:28:57,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:57,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 10:28:57,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:28:57,143 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand 14 states. [2021-01-06 10:28:57,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:57,388 INFO L93 Difference]: Finished difference Result 314 states and 369 transitions. [2021-01-06 10:28:57,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 10:28:57,389 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2021-01-06 10:28:57,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:57,391 INFO L225 Difference]: With dead ends: 314 [2021-01-06 10:28:57,391 INFO L226 Difference]: Without dead ends: 283 [2021-01-06 10:28:57,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:28:57,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-01-06 10:28:57,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 65. [2021-01-06 10:28:57,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-01-06 10:28:57,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2021-01-06 10:28:57,402 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 49 [2021-01-06 10:28:57,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:57,402 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2021-01-06 10:28:57,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 10:28:57,402 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2021-01-06 10:28:57,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-06 10:28:57,403 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:57,404 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:57,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:57,616 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:57,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:57,617 INFO L82 PathProgramCache]: Analyzing trace with hash -69913235, now seen corresponding path program 6 times [2021-01-06 10:28:57,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:57,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097945337] [2021-01-06 10:28:57,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:57,651 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:28:57,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1474934436] [2021-01-06 10:28:57,652 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:57,722 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-06 10:28:57,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:57,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 10:28:57,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:57,883 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-01-06 10:28:57,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097945337] [2021-01-06 10:28:57,883 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:28:57,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474934436] [2021-01-06 10:28:57,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:28:57,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 10:28:57,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646104120] [2021-01-06 10:28:57,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:28:57,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:57,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:28:57,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:28:57,886 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand 9 states. [2021-01-06 10:28:58,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:58,014 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2021-01-06 10:28:58,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:28:58,014 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2021-01-06 10:28:58,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:58,016 INFO L225 Difference]: With dead ends: 77 [2021-01-06 10:28:58,016 INFO L226 Difference]: Without dead ends: 75 [2021-01-06 10:28:58,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:28:58,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-01-06 10:28:58,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2021-01-06 10:28:58,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-01-06 10:28:58,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2021-01-06 10:28:58,049 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 58 [2021-01-06 10:28:58,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:58,049 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2021-01-06 10:28:58,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:28:58,049 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2021-01-06 10:28:58,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-06 10:28:58,052 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:58,053 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:58,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 10:28:58,266 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:58,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:58,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1619534901, now seen corresponding path program 7 times [2021-01-06 10:28:58,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:58,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539005835] [2021-01-06 10:28:58,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:58,285 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:28:58,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1306757197] [2021-01-06 10:28:58,285 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:58,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:58,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 10:28:58,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:58,737 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-01-06 10:28:58,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539005835] [2021-01-06 10:28:58,737 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:28:58,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306757197] [2021-01-06 10:28:58,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:28:58,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-01-06 10:28:58,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259612212] [2021-01-06 10:28:58,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 10:28:58,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:58,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 10:28:58,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:28:58,740 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand 17 states. [2021-01-06 10:28:59,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:59,015 INFO L93 Difference]: Finished difference Result 450 states and 529 transitions. [2021-01-06 10:28:59,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 10:28:59,016 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2021-01-06 10:28:59,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:59,019 INFO L225 Difference]: With dead ends: 450 [2021-01-06 10:28:59,019 INFO L226 Difference]: Without dead ends: 414 [2021-01-06 10:28:59,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:28:59,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-01-06 10:28:59,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 79. [2021-01-06 10:28:59,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-06 10:28:59,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2021-01-06 10:28:59,032 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 63 [2021-01-06 10:28:59,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:59,032 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2021-01-06 10:28:59,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 10:28:59,033 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2021-01-06 10:28:59,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-01-06 10:28:59,034 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:59,034 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 14, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:59,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 10:28:59,249 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:59,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:59,250 INFO L82 PathProgramCache]: Analyzing trace with hash 206411567, now seen corresponding path program 8 times [2021-01-06 10:28:59,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:59,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88508246] [2021-01-06 10:28:59,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:59,279 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:28:59,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [777516874] [2021-01-06 10:28:59,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:59,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:28:59,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:59,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 10:28:59,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:59,792 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-01-06 10:28:59,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88508246] [2021-01-06 10:28:59,793 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:28:59,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777516874] [2021-01-06 10:28:59,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:28:59,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-01-06 10:28:59,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964141457] [2021-01-06 10:28:59,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 10:28:59,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:59,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 10:28:59,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:28:59,795 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand 20 states. [2021-01-06 10:29:00,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:00,126 INFO L93 Difference]: Finished difference Result 540 states and 634 transitions. [2021-01-06 10:29:00,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 10:29:00,126 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 72 [2021-01-06 10:29:00,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:00,129 INFO L225 Difference]: With dead ends: 540 [2021-01-06 10:29:00,129 INFO L226 Difference]: Without dead ends: 504 [2021-01-06 10:29:00,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:29:00,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-01-06 10:29:00,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 88. [2021-01-06 10:29:00,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-01-06 10:29:00,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2021-01-06 10:29:00,164 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 72 [2021-01-06 10:29:00,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:00,165 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2021-01-06 10:29:00,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 10:29:00,165 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2021-01-06 10:29:00,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-06 10:29:00,166 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:00,166 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 17, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:00,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 10:29:00,380 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:00,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:00,381 INFO L82 PathProgramCache]: Analyzing trace with hash 306240885, now seen corresponding path program 9 times [2021-01-06 10:29:00,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:00,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765432646] [2021-01-06 10:29:00,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:00,408 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:00,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1479191804] [2021-01-06 10:29:00,411 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:00,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 10:29:00,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:00,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 10:29:00,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:00,718 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-01-06 10:29:00,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765432646] [2021-01-06 10:29:00,719 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:00,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479191804] [2021-01-06 10:29:00,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:00,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 10:29:00,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261587189] [2021-01-06 10:29:00,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:29:00,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:00,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:29:00,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:29:00,721 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand 10 states. [2021-01-06 10:29:00,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:00,870 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2021-01-06 10:29:00,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:29:00,871 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 81 [2021-01-06 10:29:00,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:00,872 INFO L225 Difference]: With dead ends: 100 [2021-01-06 10:29:00,872 INFO L226 Difference]: Without dead ends: 98 [2021-01-06 10:29:00,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:29:00,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-01-06 10:29:00,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2021-01-06 10:29:00,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2021-01-06 10:29:00,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2021-01-06 10:29:00,881 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 81 [2021-01-06 10:29:00,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:00,881 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2021-01-06 10:29:00,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:29:00,881 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2021-01-06 10:29:00,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-06 10:29:00,882 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:00,882 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 17, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:01,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:01,097 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:01,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:01,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1355563309, now seen corresponding path program 10 times [2021-01-06 10:29:01,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:01,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760977945] [2021-01-06 10:29:01,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:01,127 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:01,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1650696538] [2021-01-06 10:29:01,128 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:01,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:29:01,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:01,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 10:29:01,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:01,710 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 508 proven. 24 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:29:01,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760977945] [2021-01-06 10:29:01,711 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:01,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650696538] [2021-01-06 10:29:01,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:01,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-01-06 10:29:01,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90875471] [2021-01-06 10:29:01,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 10:29:01,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:01,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 10:29:01,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-01-06 10:29:01,713 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand 23 states. [2021-01-06 10:29:02,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:02,503 INFO L93 Difference]: Finished difference Result 580 states and 680 transitions. [2021-01-06 10:29:02,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 10:29:02,503 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 86 [2021-01-06 10:29:02,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:02,506 INFO L225 Difference]: With dead ends: 580 [2021-01-06 10:29:02,507 INFO L226 Difference]: Without dead ends: 547 [2021-01-06 10:29:02,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=328, Invalid=374, Unknown=0, NotChecked=0, Total=702 [2021-01-06 10:29:02,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-01-06 10:29:02,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 96. [2021-01-06 10:29:02,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2021-01-06 10:29:02,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2021-01-06 10:29:02,522 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 86 [2021-01-06 10:29:02,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:02,523 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2021-01-06 10:29:02,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 10:29:02,523 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2021-01-06 10:29:02,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-01-06 10:29:02,524 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:02,524 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 17, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:02,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 10:29:02,739 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:02,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:02,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1036957617, now seen corresponding path program 11 times [2021-01-06 10:29:02,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:02,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90036935] [2021-01-06 10:29:02,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:02,758 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:02,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [772559702] [2021-01-06 10:29:02,759 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:03,312 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-01-06 10:29:03,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:03,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 10:29:03,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:03,871 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:29:03,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90036935] [2021-01-06 10:29:03,871 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:03,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772559702] [2021-01-06 10:29:03,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:03,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-01-06 10:29:03,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809019660] [2021-01-06 10:29:03,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 10:29:03,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:03,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 10:29:03,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 10:29:03,874 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand 24 states. [2021-01-06 10:29:04,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:04,327 INFO L93 Difference]: Finished difference Result 757 states and 892 transitions. [2021-01-06 10:29:04,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 10:29:04,328 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 89 [2021-01-06 10:29:04,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:04,332 INFO L225 Difference]: With dead ends: 757 [2021-01-06 10:29:04,332 INFO L226 Difference]: Without dead ends: 713 [2021-01-06 10:29:04,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 10:29:04,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-01-06 10:29:04,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 108. [2021-01-06 10:29:04,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2021-01-06 10:29:04,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 118 transitions. [2021-01-06 10:29:04,348 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 118 transitions. Word has length 89 [2021-01-06 10:29:04,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:04,348 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 118 transitions. [2021-01-06 10:29:04,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 10:29:04,349 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 118 transitions. [2021-01-06 10:29:04,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-01-06 10:29:04,349 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:04,350 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 21, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:04,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 10:29:04,565 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:04,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:04,566 INFO L82 PathProgramCache]: Analyzing trace with hash -445045967, now seen corresponding path program 12 times [2021-01-06 10:29:04,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:04,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190123949] [2021-01-06 10:29:04,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:04,593 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:04,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1435391276] [2021-01-06 10:29:04,594 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 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 [2021-01-06 10:29:04,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 10:29:04,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:04,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 10:29:04,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:05,003 INFO L134 CoverageAnalysis]: Checked inductivity of 898 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2021-01-06 10:29:05,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190123949] [2021-01-06 10:29:05,003 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:05,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435391276] [2021-01-06 10:29:05,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:05,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 10:29:05,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98107083] [2021-01-06 10:29:05,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:29:05,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:05,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:29:05,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:29:05,005 INFO L87 Difference]: Start difference. First operand 108 states and 118 transitions. Second operand 11 states. [2021-01-06 10:29:05,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:05,190 INFO L93 Difference]: Finished difference Result 120 states and 132 transitions. [2021-01-06 10:29:05,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:29:05,191 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 101 [2021-01-06 10:29:05,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:05,193 INFO L225 Difference]: With dead ends: 120 [2021-01-06 10:29:05,193 INFO L226 Difference]: Without dead ends: 118 [2021-01-06 10:29:05,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:29:05,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-01-06 10:29:05,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 113. [2021-01-06 10:29:05,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2021-01-06 10:29:05,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 124 transitions. [2021-01-06 10:29:05,206 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 124 transitions. Word has length 101 [2021-01-06 10:29:05,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:05,207 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 124 transitions. [2021-01-06 10:29:05,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:29:05,207 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 124 transitions. [2021-01-06 10:29:05,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-01-06 10:29:05,208 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:05,208 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 21, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:05,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:05,423 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:05,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:05,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1077530383, now seen corresponding path program 13 times [2021-01-06 10:29:05,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:05,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89853367] [2021-01-06 10:29:05,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:05,461 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:05,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1317326965] [2021-01-06 10:29:05,461 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 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 [2021-01-06 10:29:05,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:05,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 10:29:05,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:06,323 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-01-06 10:29:06,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89853367] [2021-01-06 10:29:06,323 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:06,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317326965] [2021-01-06 10:29:06,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:06,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-01-06 10:29:06,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381807146] [2021-01-06 10:29:06,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 10:29:06,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:06,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 10:29:06,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 10:29:06,325 INFO L87 Difference]: Start difference. First operand 113 states and 124 transitions. Second operand 28 states. [2021-01-06 10:29:06,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:06,942 INFO L93 Difference]: Finished difference Result 1003 states and 1183 transitions. [2021-01-06 10:29:06,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 10:29:06,943 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 106 [2021-01-06 10:29:06,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:06,949 INFO L225 Difference]: With dead ends: 1003 [2021-01-06 10:29:06,950 INFO L226 Difference]: Without dead ends: 954 [2021-01-06 10:29:06,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 10:29:06,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2021-01-06 10:29:06,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 125. [2021-01-06 10:29:06,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2021-01-06 10:29:06,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 136 transitions. [2021-01-06 10:29:06,981 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 136 transitions. Word has length 106 [2021-01-06 10:29:06,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:06,981 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 136 transitions. [2021-01-06 10:29:06,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 10:29:06,982 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 136 transitions. [2021-01-06 10:29:06,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-01-06 10:29:06,985 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:06,985 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 25, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:07,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:07,200 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:07,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:07,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1674589553, now seen corresponding path program 14 times [2021-01-06 10:29:07,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:07,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610940816] [2021-01-06 10:29:07,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:07,226 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:07,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1042585826] [2021-01-06 10:29:07,227 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 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 [2021-01-06 10:29:07,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:29:07,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:07,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 10:29:07,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:08,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-01-06 10:29:08,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610940816] [2021-01-06 10:29:08,265 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:08,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042585826] [2021-01-06 10:29:08,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:08,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2021-01-06 10:29:08,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552295715] [2021-01-06 10:29:08,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 10:29:08,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:08,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 10:29:08,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 10:29:08,267 INFO L87 Difference]: Start difference. First operand 125 states and 136 transitions. Second operand 32 states. [2021-01-06 10:29:08,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:08,980 INFO L93 Difference]: Finished difference Result 1163 states and 1371 transitions. [2021-01-06 10:29:08,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 10:29:08,981 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 118 [2021-01-06 10:29:08,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:08,986 INFO L225 Difference]: With dead ends: 1163 [2021-01-06 10:29:08,986 INFO L226 Difference]: Without dead ends: 1114 [2021-01-06 10:29:08,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 10:29:08,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-01-06 10:29:09,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 137. [2021-01-06 10:29:09,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2021-01-06 10:29:09,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 148 transitions. [2021-01-06 10:29:09,009 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 148 transitions. Word has length 118 [2021-01-06 10:29:09,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:09,009 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 148 transitions. [2021-01-06 10:29:09,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 10:29:09,010 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 148 transitions. [2021-01-06 10:29:09,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-01-06 10:29:09,011 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:09,011 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 29, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:09,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:09,224 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:09,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:09,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1770554895, now seen corresponding path program 15 times [2021-01-06 10:29:09,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:09,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048779167] [2021-01-06 10:29:09,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:09,247 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:09,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1918327218] [2021-01-06 10:29:09,248 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 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 [2021-01-06 10:29:09,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 10:29:09,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:09,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 10:29:09,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:09,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1590 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-01-06 10:29:09,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048779167] [2021-01-06 10:29:09,875 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:09,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918327218] [2021-01-06 10:29:09,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:09,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-01-06 10:29:09,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936365979] [2021-01-06 10:29:09,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 10:29:09,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:09,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 10:29:09,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:29:09,877 INFO L87 Difference]: Start difference. First operand 137 states and 148 transitions. Second operand 12 states. [2021-01-06 10:29:10,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:10,102 INFO L93 Difference]: Finished difference Result 149 states and 162 transitions. [2021-01-06 10:29:10,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 10:29:10,104 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 130 [2021-01-06 10:29:10,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:10,106 INFO L225 Difference]: With dead ends: 149 [2021-01-06 10:29:10,106 INFO L226 Difference]: Without dead ends: 147 [2021-01-06 10:29:10,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:29:10,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-01-06 10:29:10,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 142. [2021-01-06 10:29:10,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2021-01-06 10:29:10,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 154 transitions. [2021-01-06 10:29:10,122 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 154 transitions. Word has length 130 [2021-01-06 10:29:10,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:10,123 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 154 transitions. [2021-01-06 10:29:10,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 10:29:10,123 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 154 transitions. [2021-01-06 10:29:10,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-01-06 10:29:10,124 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:10,124 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 29, 7, 7, 7, 6, 6, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:10,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 10:29:10,338 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:10,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:10,339 INFO L82 PathProgramCache]: Analyzing trace with hash 99619377, now seen corresponding path program 16 times [2021-01-06 10:29:10,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:10,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990972825] [2021-01-06 10:29:10,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:10,360 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:10,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [477987995] [2021-01-06 10:29:10,360 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 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 [2021-01-06 10:29:10,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:29:10,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:10,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 10:29:10,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:11,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 1476 proven. 44 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-01-06 10:29:11,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990972825] [2021-01-06 10:29:11,643 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:11,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477987995] [2021-01-06 10:29:11,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:11,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2021-01-06 10:29:11,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198760310] [2021-01-06 10:29:11,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 10:29:11,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:11,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 10:29:11,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=665, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 10:29:11,646 INFO L87 Difference]: Start difference. First operand 142 states and 154 transitions. Second operand 36 states. [2021-01-06 10:29:13,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:13,128 INFO L93 Difference]: Finished difference Result 1247 states and 1469 transitions. [2021-01-06 10:29:13,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-06 10:29:13,129 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 135 [2021-01-06 10:29:13,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:13,135 INFO L225 Difference]: With dead ends: 1247 [2021-01-06 10:29:13,135 INFO L226 Difference]: Without dead ends: 1204 [2021-01-06 10:29:13,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=854, Invalid=952, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 10:29:13,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2021-01-06 10:29:13,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 145. [2021-01-06 10:29:13,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2021-01-06 10:29:13,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 158 transitions. [2021-01-06 10:29:13,161 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 158 transitions. Word has length 135 [2021-01-06 10:29:13,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:13,161 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 158 transitions. [2021-01-06 10:29:13,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 10:29:13,161 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 158 transitions. [2021-01-06 10:29:13,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-01-06 10:29:13,163 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:13,163 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 29, 7, 7, 7, 6, 6, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:13,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 10:29:13,377 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:13,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:13,377 INFO L82 PathProgramCache]: Analyzing trace with hash -274498259, now seen corresponding path program 17 times [2021-01-06 10:29:13,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:13,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457697050] [2021-01-06 10:29:13,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:13,397 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:13,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [882278653] [2021-01-06 10:29:13,398 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 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 [2021-01-06 10:29:19,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2021-01-06 10:29:19,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:19,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 10:29:19,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:20,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1716 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-01-06 10:29:20,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457697050] [2021-01-06 10:29:20,498 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:20,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882278653] [2021-01-06 10:29:20,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:20,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2021-01-06 10:29:20,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480024019] [2021-01-06 10:29:20,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-06 10:29:20,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:20,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-06 10:29:20,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 10:29:20,500 INFO L87 Difference]: Start difference. First operand 145 states and 158 transitions. Second operand 37 states. [2021-01-06 10:29:21,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:21,407 INFO L93 Difference]: Finished difference Result 1515 states and 1790 transitions. [2021-01-06 10:29:21,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 10:29:21,409 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 138 [2021-01-06 10:29:21,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:21,416 INFO L225 Difference]: With dead ends: 1515 [2021-01-06 10:29:21,416 INFO L226 Difference]: Without dead ends: 1458 [2021-01-06 10:29:21,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 10:29:21,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2021-01-06 10:29:21,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 160. [2021-01-06 10:29:21,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2021-01-06 10:29:21,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 173 transitions. [2021-01-06 10:29:21,443 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 173 transitions. Word has length 138 [2021-01-06 10:29:21,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:21,444 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 173 transitions. [2021-01-06 10:29:21,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-01-06 10:29:21,444 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 173 transitions. [2021-01-06 10:29:21,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-01-06 10:29:21,445 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:21,446 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 34, 7, 7, 7, 6, 6, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:21,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:21,646 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:21,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:21,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1459861581, now seen corresponding path program 18 times [2021-01-06 10:29:21,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:21,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168650747] [2021-01-06 10:29:21,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:21,672 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:21,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [562916427] [2021-01-06 10:29:21,673 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 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 [2021-01-06 10:29:22,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 10:29:22,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:22,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 10:29:22,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:22,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2246 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 2147 trivial. 0 not checked. [2021-01-06 10:29:22,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168650747] [2021-01-06 10:29:22,722 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:22,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562916427] [2021-01-06 10:29:22,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:22,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-01-06 10:29:22,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594294921] [2021-01-06 10:29:22,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:29:22,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:22,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:29:22,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:29:22,723 INFO L87 Difference]: Start difference. First operand 160 states and 173 transitions. Second operand 13 states. [2021-01-06 10:29:22,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:22,983 INFO L93 Difference]: Finished difference Result 172 states and 187 transitions. [2021-01-06 10:29:22,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 10:29:22,984 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 153 [2021-01-06 10:29:22,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:22,985 INFO L225 Difference]: With dead ends: 172 [2021-01-06 10:29:22,985 INFO L226 Difference]: Without dead ends: 170 [2021-01-06 10:29:22,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-01-06 10:29:22,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-01-06 10:29:23,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 165. [2021-01-06 10:29:23,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2021-01-06 10:29:23,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 179 transitions. [2021-01-06 10:29:23,006 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 179 transitions. Word has length 153 [2021-01-06 10:29:23,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:23,007 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 179 transitions. [2021-01-06 10:29:23,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:29:23,007 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 179 transitions. [2021-01-06 10:29:23,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-01-06 10:29:23,008 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:23,009 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 34, 8, 8, 8, 7, 7, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:23,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 10:29:23,214 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:23,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:23,216 INFO L82 PathProgramCache]: Analyzing trace with hash 40865199, now seen corresponding path program 19 times [2021-01-06 10:29:23,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:23,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59502356] [2021-01-06 10:29:23,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:23,238 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:23,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [797332046] [2021-01-06 10:29:23,238 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 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 [2021-01-06 10:29:23,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:23,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 41 conjunts are in the unsatisfiable core [2021-01-06 10:29:23,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:24,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-01-06 10:29:24,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59502356] [2021-01-06 10:29:24,879 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:24,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797332046] [2021-01-06 10:29:24,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:24,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2021-01-06 10:29:24,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037839370] [2021-01-06 10:29:24,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-01-06 10:29:24,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:24,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-01-06 10:29:24,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 10:29:24,882 INFO L87 Difference]: Start difference. First operand 165 states and 179 transitions. Second operand 42 states. [2021-01-06 10:29:26,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:26,077 INFO L93 Difference]: Finished difference Result 1906 states and 2254 transitions. [2021-01-06 10:29:26,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-06 10:29:26,078 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 158 [2021-01-06 10:29:26,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:26,086 INFO L225 Difference]: With dead ends: 1906 [2021-01-06 10:29:26,086 INFO L226 Difference]: Without dead ends: 1844 [2021-01-06 10:29:26,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 10:29:26,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-01-06 10:29:26,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 180. [2021-01-06 10:29:26,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2021-01-06 10:29:26,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 194 transitions. [2021-01-06 10:29:26,121 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 194 transitions. Word has length 158 [2021-01-06 10:29:26,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:26,121 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 194 transitions. [2021-01-06 10:29:26,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2021-01-06 10:29:26,121 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 194 transitions. [2021-01-06 10:29:26,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-01-06 10:29:26,123 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:26,123 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 39, 8, 8, 8, 7, 7, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:26,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:26,339 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:26,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:26,340 INFO L82 PathProgramCache]: Analyzing trace with hash -376448715, now seen corresponding path program 20 times [2021-01-06 10:29:26,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:26,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348666524] [2021-01-06 10:29:26,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:26,364 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:26,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [828734108] [2021-01-06 10:29:26,365 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 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 [2021-01-06 10:29:26,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:29:26,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:26,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 46 conjunts are in the unsatisfiable core [2021-01-06 10:29:26,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:28,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2885 backedges. 0 proven. 2752 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-01-06 10:29:28,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348666524] [2021-01-06 10:29:28,384 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:28,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828734108] [2021-01-06 10:29:28,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:28,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2021-01-06 10:29:28,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288417840] [2021-01-06 10:29:28,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-01-06 10:29:28,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:28,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-01-06 10:29:28,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 10:29:28,390 INFO L87 Difference]: Start difference. First operand 180 states and 194 transitions. Second operand 47 states. [2021-01-06 10:29:29,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:29,724 INFO L93 Difference]: Finished difference Result 2156 states and 2549 transitions. [2021-01-06 10:29:29,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 10:29:29,725 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 173 [2021-01-06 10:29:29,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:29,734 INFO L225 Difference]: With dead ends: 2156 [2021-01-06 10:29:29,734 INFO L226 Difference]: Without dead ends: 2094 [2021-01-06 10:29:29,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 10:29:29,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2094 states. [2021-01-06 10:29:29,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2094 to 195. [2021-01-06 10:29:29,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2021-01-06 10:29:29,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 209 transitions. [2021-01-06 10:29:29,773 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 209 transitions. Word has length 173 [2021-01-06 10:29:29,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:29,774 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 209 transitions. [2021-01-06 10:29:29,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2021-01-06 10:29:29,774 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 209 transitions. [2021-01-06 10:29:29,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-01-06 10:29:29,776 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:29,776 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 44, 8, 8, 8, 7, 7, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:29,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 10:29:29,990 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:29,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:29,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1396027153, now seen corresponding path program 21 times [2021-01-06 10:29:29,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:29,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31709393] [2021-01-06 10:29:29,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:30,016 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:30,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1874100151] [2021-01-06 10:29:30,017 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 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 [2021-01-06 10:29:30,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 10:29:30,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:30,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:29:30,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:30,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3565 backedges. 611 proven. 26 refuted. 0 times theorem prover too weak. 2928 trivial. 0 not checked. [2021-01-06 10:29:30,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31709393] [2021-01-06 10:29:30,643 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:30,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874100151] [2021-01-06 10:29:30,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:30,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 10:29:30,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064652721] [2021-01-06 10:29:30,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:29:30,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:30,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:29:30,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:29:30,645 INFO L87 Difference]: Start difference. First operand 195 states and 209 transitions. Second operand 9 states. [2021-01-06 10:29:30,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:30,844 INFO L93 Difference]: Finished difference Result 371 states and 418 transitions. [2021-01-06 10:29:30,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:29:30,845 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 188 [2021-01-06 10:29:30,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:30,847 INFO L225 Difference]: With dead ends: 371 [2021-01-06 10:29:30,847 INFO L226 Difference]: Without dead ends: 323 [2021-01-06 10:29:30,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:29:30,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-01-06 10:29:30,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 198. [2021-01-06 10:29:30,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2021-01-06 10:29:30,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 213 transitions. [2021-01-06 10:29:30,872 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 213 transitions. Word has length 188 [2021-01-06 10:29:30,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:30,872 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 213 transitions. [2021-01-06 10:29:30,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:29:30,872 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 213 transitions. [2021-01-06 10:29:30,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-01-06 10:29:30,874 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:30,874 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 44, 8, 8, 8, 7, 7, 5, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:31,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 10:29:31,089 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:31,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:31,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1306542921, now seen corresponding path program 22 times [2021-01-06 10:29:31,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:31,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005787228] [2021-01-06 10:29:31,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:31,115 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:31,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [288514560] [2021-01-06 10:29:31,116 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 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 [2021-01-06 10:29:31,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:29:31,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:31,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 58 conjunts are in the unsatisfiable core [2021-01-06 10:29:31,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:33,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3710 backedges. 3493 proven. 84 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-01-06 10:29:33,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005787228] [2021-01-06 10:29:33,611 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:33,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288514560] [2021-01-06 10:29:33,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:33,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2021-01-06 10:29:33,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267756528] [2021-01-06 10:29:33,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-01-06 10:29:33,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:33,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-01-06 10:29:33,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1319, Invalid=1437, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 10:29:33,614 INFO L87 Difference]: Start difference. First operand 198 states and 213 transitions. Second operand 53 states. [2021-01-06 10:29:37,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:37,671 INFO L93 Difference]: Finished difference Result 2137 states and 2525 transitions. [2021-01-06 10:29:37,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-01-06 10:29:37,672 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 191 [2021-01-06 10:29:37,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:37,680 INFO L225 Difference]: With dead ends: 2137 [2021-01-06 10:29:37,680 INFO L226 Difference]: Without dead ends: 2089 [2021-01-06 10:29:37,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2197, Invalid=2495, Unknown=0, NotChecked=0, Total=4692 [2021-01-06 10:29:37,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-01-06 10:29:37,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 201. [2021-01-06 10:29:37,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2021-01-06 10:29:37,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 217 transitions. [2021-01-06 10:29:37,723 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 217 transitions. Word has length 191 [2021-01-06 10:29:37,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:37,724 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 217 transitions. [2021-01-06 10:29:37,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2021-01-06 10:29:37,724 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 217 transitions. [2021-01-06 10:29:37,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-01-06 10:29:37,726 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:37,726 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 44, 8, 8, 8, 7, 7, 6, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:37,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 10:29:37,940 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:37,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:37,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1638489071, now seen corresponding path program 23 times [2021-01-06 10:29:37,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:37,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124590737] [2021-01-06 10:29:37,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:37,967 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:37,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [597632971] [2021-01-06 10:29:37,967 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 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