/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_5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:39:38,562 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:39:38,567 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:39:38,629 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:39:38,630 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:39:38,634 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:39:38,639 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:39:38,646 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:39:38,650 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:39:38,658 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:39:38,660 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:39:38,662 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 00:39:38,662 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:39:38,663 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:39:38,665 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:39:38,667 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:39:38,668 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:39:38,669 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:39:38,689 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:39:38,691 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:39:38,693 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:39:38,699 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:39:38,700 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:39:38,701 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:39:38,706 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 00:39:38,725 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:39:38,726 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:39:38,727 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:39:38,728 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 00:39:38,786 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:39:38,787 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:39:38,792 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:39:38,792 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:39:38,792 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:39:38,793 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:39:38,793 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:39:38,793 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:39:38,793 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:39:38,793 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:39:38,795 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:39:38,795 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:39:38,795 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:39:38,796 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:39:38,796 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:39:38,796 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:39:38,796 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:39:38,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:39:38,797 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:39:38,797 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:39:38,797 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:39:38,798 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:39:38,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:39:38,798 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:39:38,798 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:39:38,798 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:39:39,264 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:39:39,308 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:39:39,312 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:39:39,314 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:39:39,314 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:39:39,315 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/partial_mod_count_5.c [2020-12-23 00:39:39,421 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d82c0b873/925906ebe0e1429dbac06428c2e60c05/FLAG300fa9478 [2020-12-23 00:39:40,203 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:39:40,203 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_5.c [2020-12-23 00:39:40,212 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d82c0b873/925906ebe0e1429dbac06428c2e60c05/FLAG300fa9478 [2020-12-23 00:39:40,561 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d82c0b873/925906ebe0e1429dbac06428c2e60c05 [2020-12-23 00:39:40,569 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:39:40,573 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:39:40,575 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:39:40,576 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:39:40,581 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:39:40,582 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:39:40" (1/1) ... [2020-12-23 00:39:40,583 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ef4f13a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:39:40, skipping insertion in model container [2020-12-23 00:39:40,584 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:39:40" (1/1) ... [2020-12-23 00:39:40,594 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:39:40,611 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 00:39:40,774 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_5.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,] [2020-12-23 00:39:40,803 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:39:40,815 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 00:39:40,829 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_5.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,] [2020-12-23 00:39:40,839 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:39:40,858 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:39:40,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:39:40 WrapperNode [2020-12-23 00:39:40,859 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:39:40,861 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:39:40,861 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:39:40,861 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:39:40,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:39:40" (1/1) ... [2020-12-23 00:39:40,881 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:39:40" (1/1) ... [2020-12-23 00:39:40,906 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:39:40,907 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:39:40,908 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:39:40,908 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:39:40,919 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:39:40" (1/1) ... [2020-12-23 00:39:40,919 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:39:40" (1/1) ... [2020-12-23 00:39:40,922 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:39:40" (1/1) ... [2020-12-23 00:39:40,922 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:39:40" (1/1) ... [2020-12-23 00:39:40,929 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:39:40" (1/1) ... [2020-12-23 00:39:40,939 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:39:40" (1/1) ... [2020-12-23 00:39:40,941 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:39:40" (1/1) ... [2020-12-23 00:39:40,946 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:39:40,950 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:39:40,951 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:39:40,951 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:39:40,955 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:39:40" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:39:41,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:39:41,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:39:41,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:39:41,069 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:39:41,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:39:41,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:39:41,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 00:39:41,458 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:39:41,459 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-23 00:39:41,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:39:41 BoogieIcfgContainer [2020-12-23 00:39:41,464 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:39:41,467 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:39:41,468 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:39:41,473 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:39:41,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:39:40" (1/3) ... [2020-12-23 00:39:41,474 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36fde18c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:39:41, skipping insertion in model container [2020-12-23 00:39:41,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:39:40" (2/3) ... [2020-12-23 00:39:41,475 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36fde18c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:39:41, skipping insertion in model container [2020-12-23 00:39:41,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:39:41" (3/3) ... [2020-12-23 00:39:41,478 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_5.c [2020-12-23 00:39:41,488 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:39:41,495 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:39:41,524 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:39:41,587 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:39:41,587 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:39:41,587 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:39:41,587 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:39:41,588 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:39:41,588 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:39:41,588 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:39:41,588 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:39:41,613 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-12-23 00:39:41,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 00:39:41,623 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:41,624 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:41,625 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:41,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:41,635 INFO L82 PathProgramCache]: Analyzing trace with hash -694175938, now seen corresponding path program 1 times [2020-12-23 00:39:41,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:41,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250989006] [2020-12-23 00:39:41,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:41,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:39:41,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:39:41,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250989006] [2020-12-23 00:39:41,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:39:41,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 00:39:41,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596616958] [2020-12-23 00:39:41,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 00:39:41,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:41,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 00:39:41,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:39:42,000 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2020-12-23 00:39:42,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:42,032 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2020-12-23 00:39:42,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 00:39:42,035 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-12-23 00:39:42,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:42,062 INFO L225 Difference]: With dead ends: 29 [2020-12-23 00:39:42,063 INFO L226 Difference]: Without dead ends: 13 [2020-12-23 00:39:42,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:39:42,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-23 00:39:42,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-23 00:39:42,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-23 00:39:42,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2020-12-23 00:39:42,129 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 9 [2020-12-23 00:39:42,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:42,130 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2020-12-23 00:39:42,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 00:39:42,130 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2020-12-23 00:39:42,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 00:39:42,133 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:42,133 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:42,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 00:39:42,135 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:42,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:42,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1866781837, now seen corresponding path program 1 times [2020-12-23 00:39:42,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:42,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034108505] [2020-12-23 00:39:42,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:42,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:39:42,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:39:42,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034108505] [2020-12-23 00:39:42,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:39:42,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:39:42,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538852280] [2020-12-23 00:39:42,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:39:42,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:42,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:39:42,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:39:42,328 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand 4 states. [2020-12-23 00:39:42,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:42,451 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2020-12-23 00:39:42,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:39:42,452 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-23 00:39:42,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:42,453 INFO L225 Difference]: With dead ends: 34 [2020-12-23 00:39:42,453 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 00:39:42,454 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 [2020-12-23 00:39:42,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 00:39:42,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 15. [2020-12-23 00:39:42,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-23 00:39:42,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2020-12-23 00:39:42,469 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 9 [2020-12-23 00:39:42,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:42,469 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2020-12-23 00:39:42,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:39:42,470 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2020-12-23 00:39:42,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 00:39:42,471 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:42,471 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:42,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 00:39:42,474 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:42,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:42,475 INFO L82 PathProgramCache]: Analyzing trace with hash 97563565, now seen corresponding path program 1 times [2020-12-23 00:39:42,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:42,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944509278] [2020-12-23 00:39:42,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:42,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:39:42,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:39:42,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944509278] [2020-12-23 00:39:42,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630749092] [2020-12-23 00:39:42,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:42,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:39:42,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:39:42,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:42,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:39:42,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:39:42,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-23 00:39:42,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310489782] [2020-12-23 00:39:42,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:39:42,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:42,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:39:42,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:39:42,837 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 7 states. [2020-12-23 00:39:42,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:42,904 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2020-12-23 00:39:42,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:39:42,905 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-12-23 00:39:42,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:42,906 INFO L225 Difference]: With dead ends: 44 [2020-12-23 00:39:42,906 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 00:39:42,907 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 [2020-12-23 00:39:42,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 00:39:42,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 18. [2020-12-23 00:39:42,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 00:39:42,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-12-23 00:39:42,913 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2020-12-23 00:39:42,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:42,913 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-12-23 00:39:42,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:39:42,914 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-12-23 00:39:42,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 00:39:42,914 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:42,915 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:43,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 00:39:43,128 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:43,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:43,130 INFO L82 PathProgramCache]: Analyzing trace with hash 982026547, now seen corresponding path program 2 times [2020-12-23 00:39:43,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:43,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565749884] [2020-12-23 00:39:43,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:43,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:39:43,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:39:43,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565749884] [2020-12-23 00:39:43,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630390906] [2020-12-23 00:39:43,202 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 [2020-12-23 00:39:43,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 00:39:43,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:43,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:39:43,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:43,339 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:39:43,358 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:39:43,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 00:39:43,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:43,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2020-12-23 00:39:43,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198888452] [2020-12-23 00:39:43,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:39:43,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:43,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:39:43,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:39:43,374 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 6 states. [2020-12-23 00:39:43,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:43,470 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-12-23 00:39:43,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 00:39:43,471 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-12-23 00:39:43,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:43,472 INFO L225 Difference]: With dead ends: 35 [2020-12-23 00:39:43,472 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 00:39:43,473 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 [2020-12-23 00:39:43,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 00:39:43,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2020-12-23 00:39:43,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 00:39:43,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-12-23 00:39:43,480 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 15 [2020-12-23 00:39:43,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:43,481 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-12-23 00:39:43,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:39:43,481 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-12-23 00:39:43,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 00:39:43,482 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:43,482 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:43,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:43,711 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:43,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:43,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1305492527, now seen corresponding path program 1 times [2020-12-23 00:39:43,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:43,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371510294] [2020-12-23 00:39:43,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:43,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:39:43,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:39:43,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371510294] [2020-12-23 00:39:43,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490359972] [2020-12-23 00:39:43,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:43,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:39:43,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:39:43,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:43,971 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:39:43,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:39:43,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-23 00:39:43,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945510629] [2020-12-23 00:39:43,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:39:43,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:43,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:39:43,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:39:43,975 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 9 states. [2020-12-23 00:39:44,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:44,064 INFO L93 Difference]: Finished difference Result 93 states and 111 transitions. [2020-12-23 00:39:44,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:39:44,065 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-12-23 00:39:44,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:44,066 INFO L225 Difference]: With dead ends: 93 [2020-12-23 00:39:44,067 INFO L226 Difference]: Without dead ends: 72 [2020-12-23 00:39:44,067 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 [2020-12-23 00:39:44,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-23 00:39:44,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 31. [2020-12-23 00:39:44,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 00:39:44,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-12-23 00:39:44,075 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 20 [2020-12-23 00:39:44,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:44,076 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-12-23 00:39:44,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:39:44,076 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-12-23 00:39:44,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 00:39:44,077 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:44,077 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:44,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:44,291 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:44,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:44,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1739926453, now seen corresponding path program 2 times [2020-12-23 00:39:44,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:44,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614738499] [2020-12-23 00:39:44,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:44,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:39:44,375 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:39:44,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614738499] [2020-12-23 00:39:44,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647997160] [2020-12-23 00:39:44,376 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 [2020-12-23 00:39:44,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:39:44,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:44,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:39:44,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:44,531 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:39:44,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:39:44,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-23 00:39:44,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476336464] [2020-12-23 00:39:44,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:39:44,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:44,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:39:44,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:39:44,535 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 11 states. [2020-12-23 00:39:44,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:44,641 INFO L93 Difference]: Finished difference Result 113 states and 134 transitions. [2020-12-23 00:39:44,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:39:44,642 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2020-12-23 00:39:44,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:44,644 INFO L225 Difference]: With dead ends: 113 [2020-12-23 00:39:44,644 INFO L226 Difference]: Without dead ends: 92 [2020-12-23 00:39:44,645 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 [2020-12-23 00:39:44,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-23 00:39:44,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 34. [2020-12-23 00:39:44,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 00:39:44,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-12-23 00:39:44,652 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 23 [2020-12-23 00:39:44,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:44,653 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-12-23 00:39:44,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:39:44,653 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-12-23 00:39:44,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 00:39:44,654 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:44,654 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:44,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:44,870 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:44,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:44,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1070414225, now seen corresponding path program 3 times [2020-12-23 00:39:44,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:44,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319609327] [2020-12-23 00:39:44,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:44,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:39:44,964 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:39:44,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319609327] [2020-12-23 00:39:44,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402640005] [2020-12-23 00:39:44,966 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 [2020-12-23 00:39:45,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 00:39:45,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:45,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:39:45,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:45,121 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-12-23 00:39:45,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:45,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2020-12-23 00:39:45,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412120206] [2020-12-23 00:39:45,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:39:45,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:45,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:39:45,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:39:45,124 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 5 states. [2020-12-23 00:39:45,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:45,197 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2020-12-23 00:39:45,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:39:45,197 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-12-23 00:39:45,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:45,198 INFO L225 Difference]: With dead ends: 79 [2020-12-23 00:39:45,199 INFO L226 Difference]: Without dead ends: 61 [2020-12-23 00:39:45,199 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 [2020-12-23 00:39:45,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-23 00:39:45,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 36. [2020-12-23 00:39:45,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 00:39:45,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-12-23 00:39:45,206 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 26 [2020-12-23 00:39:45,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:45,207 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-12-23 00:39:45,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:39:45,207 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-12-23 00:39:45,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 00:39:45,208 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:45,208 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:45,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 00:39:45,422 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:45,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:45,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1120934345, now seen corresponding path program 1 times [2020-12-23 00:39:45,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:45,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492763627] [2020-12-23 00:39:45,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:45,449 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:45,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1890262357] [2020-12-23 00:39:45,450 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 [2020-12-23 00:39:45,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:39:45,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:39:45,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:45,616 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:39:45,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492763627] [2020-12-23 00:39:45,617 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:45,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890262357] [2020-12-23 00:39:45,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:45,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 00:39:45,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198751571] [2020-12-23 00:39:45,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:39:45,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:45,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:39:45,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:39:45,620 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 9 states. [2020-12-23 00:39:45,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:45,769 INFO L93 Difference]: Finished difference Result 157 states and 184 transitions. [2020-12-23 00:39:45,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:39:45,769 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-12-23 00:39:45,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:45,771 INFO L225 Difference]: With dead ends: 157 [2020-12-23 00:39:45,771 INFO L226 Difference]: Without dead ends: 134 [2020-12-23 00:39:45,773 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 [2020-12-23 00:39:45,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-23 00:39:45,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 42. [2020-12-23 00:39:45,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 00:39:45,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2020-12-23 00:39:45,782 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 29 [2020-12-23 00:39:45,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:45,782 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2020-12-23 00:39:45,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:39:45,783 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2020-12-23 00:39:45,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 00:39:45,784 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:45,784 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:45,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:46,000 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:46,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:46,001 INFO L82 PathProgramCache]: Analyzing trace with hash -2107317257, now seen corresponding path program 2 times [2020-12-23 00:39:46,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:46,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014320940] [2020-12-23 00:39:46,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:46,018 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:46,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [3226909] [2020-12-23 00:39:46,019 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 [2020-12-23 00:39:46,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:39:46,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:46,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:39:46,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:46,281 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:39:46,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014320940] [2020-12-23 00:39:46,282 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:46,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3226909] [2020-12-23 00:39:46,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:46,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 00:39:46,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436615495] [2020-12-23 00:39:46,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:39:46,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:46,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:39:46,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:39:46,285 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 11 states. [2020-12-23 00:39:46,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:46,467 INFO L93 Difference]: Finished difference Result 197 states and 230 transitions. [2020-12-23 00:39:46,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:39:46,468 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-12-23 00:39:46,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:46,470 INFO L225 Difference]: With dead ends: 197 [2020-12-23 00:39:46,470 INFO L226 Difference]: Without dead ends: 174 [2020-12-23 00:39:46,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:39:46,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-12-23 00:39:46,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 48. [2020-12-23 00:39:46,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 00:39:46,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-12-23 00:39:46,481 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 35 [2020-12-23 00:39:46,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:46,482 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-12-23 00:39:46,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:39:46,482 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-12-23 00:39:46,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 00:39:46,483 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:46,483 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:46,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:46,693 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:46,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:46,694 INFO L82 PathProgramCache]: Analyzing trace with hash -975924809, now seen corresponding path program 3 times [2020-12-23 00:39:46,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:46,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357784039] [2020-12-23 00:39:46,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:46,711 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:46,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [194645425] [2020-12-23 00:39:46,712 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 [2020-12-23 00:39:46,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 00:39:46,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:46,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 00:39:46,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:46,882 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-23 00:39:46,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357784039] [2020-12-23 00:39:46,883 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:46,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194645425] [2020-12-23 00:39:46,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:46,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 00:39:46,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823189265] [2020-12-23 00:39:46,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 00:39:46,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:46,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 00:39:46,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:39:46,886 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 8 states. [2020-12-23 00:39:46,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:46,981 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2020-12-23 00:39:46,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:39:46,982 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-12-23 00:39:46,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:46,983 INFO L225 Difference]: With dead ends: 60 [2020-12-23 00:39:46,983 INFO L226 Difference]: Without dead ends: 58 [2020-12-23 00:39:46,984 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 [2020-12-23 00:39:46,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-23 00:39:46,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2020-12-23 00:39:46,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-23 00:39:46,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2020-12-23 00:39:46,992 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 41 [2020-12-23 00:39:46,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:46,992 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2020-12-23 00:39:46,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 00:39:46,992 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2020-12-23 00:39:46,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 00:39:46,994 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:46,995 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:47,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 00:39:47,196 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:47,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:47,197 INFO L82 PathProgramCache]: Analyzing trace with hash 2047403563, now seen corresponding path program 4 times [2020-12-23 00:39:47,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:47,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143130881] [2020-12-23 00:39:47,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:47,213 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:47,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [385513599] [2020-12-23 00:39:47,214 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 [2020-12-23 00:39:47,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:39:47,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:47,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 00:39:47,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:47,480 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 107 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-23 00:39:47,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143130881] [2020-12-23 00:39:47,481 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:47,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385513599] [2020-12-23 00:39:47,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:47,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-23 00:39:47,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431703262] [2020-12-23 00:39:47,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 00:39:47,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:47,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 00:39:47,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=87, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:39:47,484 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 13 states. [2020-12-23 00:39:47,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:47,802 INFO L93 Difference]: Finished difference Result 211 states and 246 transitions. [2020-12-23 00:39:47,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 00:39:47,803 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2020-12-23 00:39:47,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:47,804 INFO L225 Difference]: With dead ends: 211 [2020-12-23 00:39:47,804 INFO L226 Difference]: Without dead ends: 188 [2020-12-23 00:39:47,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=114, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:39:47,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-12-23 00:39:47,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 56. [2020-12-23 00:39:47,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-23 00:39:47,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2020-12-23 00:39:47,816 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 46 [2020-12-23 00:39:47,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:47,816 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2020-12-23 00:39:47,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 00:39:47,816 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2020-12-23 00:39:47,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 00:39:47,817 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:47,817 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 8, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:48,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:48,033 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:48,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:48,035 INFO L82 PathProgramCache]: Analyzing trace with hash -520854285, now seen corresponding path program 5 times [2020-12-23 00:39:48,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:48,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580349605] [2020-12-23 00:39:48,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:48,054 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:48,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2008163335] [2020-12-23 00:39:48,055 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 [2020-12-23 00:39:48,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-12-23 00:39:48,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:48,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 00:39:48,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:48,565 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-23 00:39:48,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580349605] [2020-12-23 00:39:48,565 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:48,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008163335] [2020-12-23 00:39:48,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:48,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-23 00:39:48,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490340251] [2020-12-23 00:39:48,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 00:39:48,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:48,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 00:39:48,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:39:48,574 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand 14 states. [2020-12-23 00:39:48,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:48,820 INFO L93 Difference]: Finished difference Result 314 states and 369 transitions. [2020-12-23 00:39:48,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 00:39:48,820 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-12-23 00:39:48,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:48,822 INFO L225 Difference]: With dead ends: 314 [2020-12-23 00:39:48,823 INFO L226 Difference]: Without dead ends: 283 [2020-12-23 00:39:48,824 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 [2020-12-23 00:39:48,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-12-23 00:39:48,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 65. [2020-12-23 00:39:48,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-23 00:39:48,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2020-12-23 00:39:48,836 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 49 [2020-12-23 00:39:48,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:48,836 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2020-12-23 00:39:48,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 00:39:48,836 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2020-12-23 00:39:48,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-23 00:39:48,837 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:48,838 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:49,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:49,044 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:49,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:49,045 INFO L82 PathProgramCache]: Analyzing trace with hash -69913235, now seen corresponding path program 6 times [2020-12-23 00:39:49,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:49,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299390646] [2020-12-23 00:39:49,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:49,069 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:49,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [408465238] [2020-12-23 00:39:49,070 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 [2020-12-23 00:39:49,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-23 00:39:49,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:49,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 00:39:49,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:49,376 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-23 00:39:49,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299390646] [2020-12-23 00:39:49,376 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:49,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408465238] [2020-12-23 00:39:49,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:49,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 00:39:49,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935158957] [2020-12-23 00:39:49,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:39:49,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:49,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:39:49,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:39:49,379 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand 9 states. [2020-12-23 00:39:49,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:49,499 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2020-12-23 00:39:49,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:39:49,500 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-12-23 00:39:49,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:49,501 INFO L225 Difference]: With dead ends: 77 [2020-12-23 00:39:49,501 INFO L226 Difference]: Without dead ends: 75 [2020-12-23 00:39:49,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:39:49,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-23 00:39:49,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2020-12-23 00:39:49,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-23 00:39:49,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2020-12-23 00:39:49,512 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 58 [2020-12-23 00:39:49,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:49,512 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2020-12-23 00:39:49,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:39:49,513 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2020-12-23 00:39:49,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-23 00:39:49,514 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:49,514 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:49,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 00:39:49,730 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:49,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:49,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1619534901, now seen corresponding path program 7 times [2020-12-23 00:39:49,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:49,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228185600] [2020-12-23 00:39:49,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:49,751 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:49,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [276094402] [2020-12-23 00:39:49,751 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 [2020-12-23 00:39:49,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:39:49,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 00:39:49,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:50,179 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-23 00:39:50,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228185600] [2020-12-23 00:39:50,180 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:50,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276094402] [2020-12-23 00:39:50,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:50,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-12-23 00:39:50,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304208081] [2020-12-23 00:39:50,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 00:39:50,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:50,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 00:39:50,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:39:50,183 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand 17 states. [2020-12-23 00:39:50,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:50,487 INFO L93 Difference]: Finished difference Result 450 states and 529 transitions. [2020-12-23 00:39:50,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 00:39:50,488 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2020-12-23 00:39:50,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:50,491 INFO L225 Difference]: With dead ends: 450 [2020-12-23 00:39:50,491 INFO L226 Difference]: Without dead ends: 414 [2020-12-23 00:39:50,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:39:50,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2020-12-23 00:39:50,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 79. [2020-12-23 00:39:50,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-23 00:39:50,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2020-12-23 00:39:50,506 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 63 [2020-12-23 00:39:50,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:50,507 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2020-12-23 00:39:50,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 00:39:50,507 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2020-12-23 00:39:50,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-23 00:39:50,509 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:50,509 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 14, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:50,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 00:39:50,723 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:50,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:50,724 INFO L82 PathProgramCache]: Analyzing trace with hash 206411567, now seen corresponding path program 8 times [2020-12-23 00:39:50,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:50,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446512150] [2020-12-23 00:39:50,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:50,769 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:50,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2044881628] [2020-12-23 00:39:50,772 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 [2020-12-23 00:39:50,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:39:50,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:50,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 00:39:50,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:51,235 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-23 00:39:51,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446512150] [2020-12-23 00:39:51,236 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:51,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044881628] [2020-12-23 00:39:51,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:51,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-12-23 00:39:51,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985589077] [2020-12-23 00:39:51,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 00:39:51,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:51,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 00:39:51,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 00:39:51,239 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand 20 states. [2020-12-23 00:39:51,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:51,610 INFO L93 Difference]: Finished difference Result 540 states and 634 transitions. [2020-12-23 00:39:51,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 00:39:51,611 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 72 [2020-12-23 00:39:51,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:51,614 INFO L225 Difference]: With dead ends: 540 [2020-12-23 00:39:51,614 INFO L226 Difference]: Without dead ends: 504 [2020-12-23 00:39:51,615 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 [2020-12-23 00:39:51,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2020-12-23 00:39:51,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 88. [2020-12-23 00:39:51,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-23 00:39:51,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2020-12-23 00:39:51,629 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 72 [2020-12-23 00:39:51,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:51,630 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2020-12-23 00:39:51,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 00:39:51,630 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2020-12-23 00:39:51,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-23 00:39:51,631 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:51,631 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 17, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:51,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 00:39:51,846 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:51,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:51,847 INFO L82 PathProgramCache]: Analyzing trace with hash 306240885, now seen corresponding path program 9 times [2020-12-23 00:39:51,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:51,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348399121] [2020-12-23 00:39:51,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:51,869 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:51,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1489009763] [2020-12-23 00:39:51,869 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 [2020-12-23 00:39:52,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 00:39:52,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:52,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 00:39:52,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:52,259 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-12-23 00:39:52,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348399121] [2020-12-23 00:39:52,260 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:52,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489009763] [2020-12-23 00:39:52,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:52,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 00:39:52,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440963288] [2020-12-23 00:39:52,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 00:39:52,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:52,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 00:39:52,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:39:52,262 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand 10 states. [2020-12-23 00:39:52,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:52,410 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2020-12-23 00:39:52,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:39:52,410 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 81 [2020-12-23 00:39:52,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:52,411 INFO L225 Difference]: With dead ends: 100 [2020-12-23 00:39:52,411 INFO L226 Difference]: Without dead ends: 98 [2020-12-23 00:39:52,412 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 [2020-12-23 00:39:52,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-23 00:39:52,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2020-12-23 00:39:52,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-23 00:39:52,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2020-12-23 00:39:52,423 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 81 [2020-12-23 00:39:52,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:52,424 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2020-12-23 00:39:52,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 00:39:52,424 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2020-12-23 00:39:52,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-23 00:39:52,425 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:52,426 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 17, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:52,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:52,635 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:52,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:52,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1355563309, now seen corresponding path program 10 times [2020-12-23 00:39:52,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:52,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015079859] [2020-12-23 00:39:52,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:52,659 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:52,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2023256506] [2020-12-23 00:39:52,662 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 [2020-12-23 00:39:52,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:39:52,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:52,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 00:39:52,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:53,255 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 508 proven. 24 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-23 00:39:53,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015079859] [2020-12-23 00:39:53,255 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:53,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023256506] [2020-12-23 00:39:53,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:53,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-12-23 00:39:53,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542774433] [2020-12-23 00:39:53,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 00:39:53,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:53,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 00:39:53,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-12-23 00:39:53,259 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand 23 states. [2020-12-23 00:39:54,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:54,049 INFO L93 Difference]: Finished difference Result 580 states and 680 transitions. [2020-12-23 00:39:54,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 00:39:54,049 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 86 [2020-12-23 00:39:54,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:54,052 INFO L225 Difference]: With dead ends: 580 [2020-12-23 00:39:54,053 INFO L226 Difference]: Without dead ends: 547 [2020-12-23 00:39:54,054 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 [2020-12-23 00:39:54,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2020-12-23 00:39:54,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 96. [2020-12-23 00:39:54,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-23 00:39:54,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2020-12-23 00:39:54,069 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 86 [2020-12-23 00:39:54,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:54,069 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2020-12-23 00:39:54,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 00:39:54,069 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2020-12-23 00:39:54,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-23 00:39:54,070 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:54,070 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 17, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:54,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 00:39:54,285 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:54,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:54,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1036957617, now seen corresponding path program 11 times [2020-12-23 00:39:54,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:54,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413002988] [2020-12-23 00:39:54,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:54,308 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:54,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [197661773] [2020-12-23 00:39:54,309 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 [2020-12-23 00:39:55,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2020-12-23 00:39:55,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:55,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 00:39:55,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:55,658 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-23 00:39:55,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413002988] [2020-12-23 00:39:55,659 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:55,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197661773] [2020-12-23 00:39:55,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:55,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-12-23 00:39:55,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916374517] [2020-12-23 00:39:55,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 00:39:55,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:55,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 00:39:55,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 00:39:55,662 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand 24 states. [2020-12-23 00:39:56,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:56,181 INFO L93 Difference]: Finished difference Result 757 states and 892 transitions. [2020-12-23 00:39:56,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 00:39:56,182 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 89 [2020-12-23 00:39:56,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:56,186 INFO L225 Difference]: With dead ends: 757 [2020-12-23 00:39:56,186 INFO L226 Difference]: Without dead ends: 713 [2020-12-23 00:39:56,187 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 [2020-12-23 00:39:56,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2020-12-23 00:39:56,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 108. [2020-12-23 00:39:56,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-23 00:39:56,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 118 transitions. [2020-12-23 00:39:56,204 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 118 transitions. Word has length 89 [2020-12-23 00:39:56,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:56,204 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 118 transitions. [2020-12-23 00:39:56,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 00:39:56,205 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 118 transitions. [2020-12-23 00:39:56,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-23 00:39:56,206 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:56,206 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 21, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:56,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 00:39:56,416 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:56,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:56,418 INFO L82 PathProgramCache]: Analyzing trace with hash -445045967, now seen corresponding path program 12 times [2020-12-23 00:39:56,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:56,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696765922] [2020-12-23 00:39:56,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:56,462 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:56,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [138577927] [2020-12-23 00:39:56,463 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 [2020-12-23 00:39:56,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-23 00:39:56,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:56,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 00:39:56,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:56,948 INFO L134 CoverageAnalysis]: Checked inductivity of 898 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2020-12-23 00:39:56,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696765922] [2020-12-23 00:39:56,949 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:56,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138577927] [2020-12-23 00:39:56,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:56,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 00:39:56,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382909227] [2020-12-23 00:39:56,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:39:56,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:56,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:39:56,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:39:56,951 INFO L87 Difference]: Start difference. First operand 108 states and 118 transitions. Second operand 11 states. [2020-12-23 00:39:57,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:57,127 INFO L93 Difference]: Finished difference Result 120 states and 132 transitions. [2020-12-23 00:39:57,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 00:39:57,129 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 101 [2020-12-23 00:39:57,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:57,132 INFO L225 Difference]: With dead ends: 120 [2020-12-23 00:39:57,133 INFO L226 Difference]: Without dead ends: 118 [2020-12-23 00:39:57,133 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 [2020-12-23 00:39:57,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-23 00:39:57,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 113. [2020-12-23 00:39:57,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-23 00:39:57,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 124 transitions. [2020-12-23 00:39:57,148 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 124 transitions. Word has length 101 [2020-12-23 00:39:57,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:57,148 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 124 transitions. [2020-12-23 00:39:57,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:39:57,149 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 124 transitions. [2020-12-23 00:39:57,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-23 00:39:57,150 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:57,150 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 21, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:57,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:57,365 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:57,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:57,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1077530383, now seen corresponding path program 13 times [2020-12-23 00:39:57,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:57,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321487265] [2020-12-23 00:39:57,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:57,390 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:57,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [52731867] [2020-12-23 00:39:57,391 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 [2020-12-23 00:39:57,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:39:57,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 00:39:57,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:58,164 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 00:39:58,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321487265] [2020-12-23 00:39:58,165 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:58,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52731867] [2020-12-23 00:39:58,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:58,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-12-23 00:39:58,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893739582] [2020-12-23 00:39:58,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 00:39:58,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:58,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 00:39:58,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 00:39:58,170 INFO L87 Difference]: Start difference. First operand 113 states and 124 transitions. Second operand 28 states. [2020-12-23 00:39:58,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:58,756 INFO L93 Difference]: Finished difference Result 1003 states and 1183 transitions. [2020-12-23 00:39:58,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 00:39:58,757 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 106 [2020-12-23 00:39:58,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:58,762 INFO L225 Difference]: With dead ends: 1003 [2020-12-23 00:39:58,763 INFO L226 Difference]: Without dead ends: 954 [2020-12-23 00:39:58,764 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 [2020-12-23 00:39:58,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2020-12-23 00:39:58,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 125. [2020-12-23 00:39:58,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-23 00:39:58,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 136 transitions. [2020-12-23 00:39:58,786 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 136 transitions. Word has length 106 [2020-12-23 00:39:58,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:58,786 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 136 transitions. [2020-12-23 00:39:58,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 00:39:58,786 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 136 transitions. [2020-12-23 00:39:58,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-23 00:39:58,787 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:58,788 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 25, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:59,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:59,004 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:59,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:59,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1674589553, now seen corresponding path program 14 times [2020-12-23 00:39:59,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:59,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552012967] [2020-12-23 00:39:59,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:59,032 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:59,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1718212839] [2020-12-23 00:39:59,033 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 [2020-12-23 00:39:59,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:39:59,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:59,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 00:39:59,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:40:00,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 00:40:00,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552012967] [2020-12-23 00:40:00,001 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:40:00,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718212839] [2020-12-23 00:40:00,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:40:00,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-12-23 00:40:00,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244029829] [2020-12-23 00:40:00,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 00:40:00,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:40:00,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 00:40:00,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-23 00:40:00,004 INFO L87 Difference]: Start difference. First operand 125 states and 136 transitions. Second operand 32 states. [2020-12-23 00:40:00,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:40:00,832 INFO L93 Difference]: Finished difference Result 1163 states and 1371 transitions. [2020-12-23 00:40:00,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 00:40:00,835 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 118 [2020-12-23 00:40:00,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:40:00,843 INFO L225 Difference]: With dead ends: 1163 [2020-12-23 00:40:00,844 INFO L226 Difference]: Without dead ends: 1114 [2020-12-23 00:40:00,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-23 00:40:00,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2020-12-23 00:40:00,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 137. [2020-12-23 00:40:00,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-23 00:40:00,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 148 transitions. [2020-12-23 00:40:00,878 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 148 transitions. Word has length 118 [2020-12-23 00:40:00,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:40:00,879 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 148 transitions. [2020-12-23 00:40:00,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 00:40:00,879 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 148 transitions. [2020-12-23 00:40:00,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-23 00:40:00,881 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:40:00,881 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 29, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 00:40:01,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:40:01,095 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:40:01,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:40:01,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1770554895, now seen corresponding path program 15 times [2020-12-23 00:40:01,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:40:01,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353520354] [2020-12-23 00:40:01,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:40:01,141 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:40:01,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [19024624] [2020-12-23 00:40:01,145 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 [2020-12-23 00:40:01,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 00:40:01,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:40:01,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 00:40:01,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:40:01,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1590 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2020-12-23 00:40:01,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353520354] [2020-12-23 00:40:01,671 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:40:01,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19024624] [2020-12-23 00:40:01,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:40:01,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-23 00:40:01,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086643300] [2020-12-23 00:40:01,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 00:40:01,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:40:01,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 00:40:01,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:40:01,673 INFO L87 Difference]: Start difference. First operand 137 states and 148 transitions. Second operand 12 states. [2020-12-23 00:40:01,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:40:01,884 INFO L93 Difference]: Finished difference Result 149 states and 162 transitions. [2020-12-23 00:40:01,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 00:40:01,885 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 130 [2020-12-23 00:40:01,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:40:01,886 INFO L225 Difference]: With dead ends: 149 [2020-12-23 00:40:01,886 INFO L226 Difference]: Without dead ends: 147 [2020-12-23 00:40:01,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:40:01,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-12-23 00:40:01,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 142. [2020-12-23 00:40:01,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-12-23 00:40:01,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 154 transitions. [2020-12-23 00:40:01,907 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 154 transitions. Word has length 130 [2020-12-23 00:40:01,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:40:01,907 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 154 transitions. [2020-12-23 00:40:01,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 00:40:01,907 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 154 transitions. [2020-12-23 00:40:01,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-23 00:40:01,909 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:40:01,909 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 29, 7, 7, 7, 6, 6, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 00:40:02,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 00:40:02,124 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:40:02,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:40:02,125 INFO L82 PathProgramCache]: Analyzing trace with hash 99619377, now seen corresponding path program 16 times [2020-12-23 00:40:02,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:40:02,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814806295] [2020-12-23 00:40:02,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:40:02,152 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:40:02,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1851237240] [2020-12-23 00:40:02,153 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:40:02,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:40:02,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:40:02,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 00:40:02,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:40:03,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 1476 proven. 44 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2020-12-23 00:40:03,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814806295] [2020-12-23 00:40:03,355 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:40:03,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851237240] [2020-12-23 00:40:03,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:40:03,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-12-23 00:40:03,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113902549] [2020-12-23 00:40:03,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 00:40:03,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:40:03,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 00:40:03,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=665, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 00:40:03,359 INFO L87 Difference]: Start difference. First operand 142 states and 154 transitions. Second operand 36 states. [2020-12-23 00:40:05,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:40:05,007 INFO L93 Difference]: Finished difference Result 1247 states and 1469 transitions. [2020-12-23 00:40:05,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 00:40:05,008 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 135 [2020-12-23 00:40:05,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:40:05,015 INFO L225 Difference]: With dead ends: 1247 [2020-12-23 00:40:05,015 INFO L226 Difference]: Without dead ends: 1204 [2020-12-23 00:40:05,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=854, Invalid=952, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 00:40:05,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2020-12-23 00:40:05,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 145. [2020-12-23 00:40:05,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-12-23 00:40:05,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 158 transitions. [2020-12-23 00:40:05,046 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 158 transitions. Word has length 135 [2020-12-23 00:40:05,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:40:05,046 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 158 transitions. [2020-12-23 00:40:05,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 00:40:05,047 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 158 transitions. [2020-12-23 00:40:05,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-23 00:40:05,048 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:40:05,048 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 29, 7, 7, 7, 6, 6, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 00:40:05,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 00:40:05,261 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:40:05,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:40:05,262 INFO L82 PathProgramCache]: Analyzing trace with hash -274498259, now seen corresponding path program 17 times [2020-12-23 00:40:05,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:40:05,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095516993] [2020-12-23 00:40:05,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:40:05,304 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:40:05,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [271403050] [2020-12-23 00:40:05,305 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 [2020-12-23 00:40:17,784 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2020-12-23 00:40:17,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:40:17,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 00:40:17,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:40:18,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1716 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2020-12-23 00:40:18,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095516993] [2020-12-23 00:40:18,837 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:40:18,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271403050] [2020-12-23 00:40:18,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:40:18,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-12-23 00:40:18,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962418416] [2020-12-23 00:40:18,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 00:40:18,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:40:18,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 00:40:18,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 00:40:18,840 INFO L87 Difference]: Start difference. First operand 145 states and 158 transitions. Second operand 37 states. [2020-12-23 00:40:19,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:40:19,750 INFO L93 Difference]: Finished difference Result 1515 states and 1790 transitions. [2020-12-23 00:40:19,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 00:40:19,751 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 138 [2020-12-23 00:40:19,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:40:19,760 INFO L225 Difference]: With dead ends: 1515 [2020-12-23 00:40:19,760 INFO L226 Difference]: Without dead ends: 1458 [2020-12-23 00:40:19,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 00:40:19,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2020-12-23 00:40:19,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 160. [2020-12-23 00:40:19,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-12-23 00:40:19,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 173 transitions. [2020-12-23 00:40:19,798 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 173 transitions. Word has length 138 [2020-12-23 00:40:19,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:40:19,799 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 173 transitions. [2020-12-23 00:40:19,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 00:40:19,799 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 173 transitions. [2020-12-23 00:40:19,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-23 00:40:19,800 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:40:19,800 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 34, 7, 7, 7, 6, 6, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 00:40:20,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:40:20,013 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:40:20,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:40:20,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1459861581, now seen corresponding path program 18 times [2020-12-23 00:40:20,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:40:20,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721169998] [2020-12-23 00:40:20,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:40:20,040 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:40:20,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [432193172] [2020-12-23 00:40:20,041 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 [2020-12-23 00:40:21,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 00:40:21,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:40:21,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 00:40:21,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:40:21,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2246 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 2147 trivial. 0 not checked. [2020-12-23 00:40:21,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721169998] [2020-12-23 00:40:21,524 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:40:21,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432193172] [2020-12-23 00:40:21,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:40:21,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-23 00:40:21,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704845570] [2020-12-23 00:40:21,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 00:40:21,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:40:21,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 00:40:21,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:40:21,526 INFO L87 Difference]: Start difference. First operand 160 states and 173 transitions. Second operand 13 states. [2020-12-23 00:40:21,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:40:21,749 INFO L93 Difference]: Finished difference Result 172 states and 187 transitions. [2020-12-23 00:40:21,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 00:40:21,750 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 153 [2020-12-23 00:40:21,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:40:21,751 INFO L225 Difference]: With dead ends: 172 [2020-12-23 00:40:21,751 INFO L226 Difference]: Without dead ends: 170 [2020-12-23 00:40:21,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-12-23 00:40:21,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-12-23 00:40:21,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 165. [2020-12-23 00:40:21,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-12-23 00:40:21,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 179 transitions. [2020-12-23 00:40:21,774 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 179 transitions. Word has length 153 [2020-12-23 00:40:21,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:40:21,774 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 179 transitions. [2020-12-23 00:40:21,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 00:40:21,774 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 179 transitions. [2020-12-23 00:40:21,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-12-23 00:40:21,775 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:40:21,775 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 34, 8, 8, 8, 7, 7, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 00:40:21,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 00:40:21,982 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:40:21,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:40:21,983 INFO L82 PathProgramCache]: Analyzing trace with hash 40865199, now seen corresponding path program 19 times [2020-12-23 00:40:21,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:40:21,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571010928] [2020-12-23 00:40:21,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:40:22,005 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:40:22,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2080378435] [2020-12-23 00:40:22,006 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 [2020-12-23 00:40:22,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:40:22,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 00:40:22,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:40:23,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-12-23 00:40:23,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571010928] [2020-12-23 00:40:23,373 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:40:23,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080378435] [2020-12-23 00:40:23,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:40:23,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-12-23 00:40:23,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448055983] [2020-12-23 00:40:23,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-23 00:40:23,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:40:23,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-23 00:40:23,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 00:40:23,376 INFO L87 Difference]: Start difference. First operand 165 states and 179 transitions. Second operand 42 states. [2020-12-23 00:40:24,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:40:24,441 INFO L93 Difference]: Finished difference Result 1906 states and 2254 transitions. [2020-12-23 00:40:24,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 00:40:24,441 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 158 [2020-12-23 00:40:24,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:40:24,450 INFO L225 Difference]: With dead ends: 1906 [2020-12-23 00:40:24,450 INFO L226 Difference]: Without dead ends: 1844 [2020-12-23 00:40:24,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 00:40:24,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2020-12-23 00:40:24,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 180. [2020-12-23 00:40:24,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-12-23 00:40:24,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 194 transitions. [2020-12-23 00:40:24,487 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 194 transitions. Word has length 158 [2020-12-23 00:40:24,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:40:24,487 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 194 transitions. [2020-12-23 00:40:24,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-23 00:40:24,487 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 194 transitions. [2020-12-23 00:40:24,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-12-23 00:40:24,488 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:40:24,488 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 39, 8, 8, 8, 7, 7, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 00:40:24,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:40:24,703 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:40:24,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:40:24,704 INFO L82 PathProgramCache]: Analyzing trace with hash -376448715, now seen corresponding path program 20 times [2020-12-23 00:40:24,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:40:24,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47905512] [2020-12-23 00:40:24,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:40:24,729 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:40:24,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1370467549] [2020-12-23 00:40:24,729 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 [2020-12-23 00:40:24,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:40:24,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:40:24,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-23 00:40:24,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:40:26,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2885 backedges. 0 proven. 2752 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-12-23 00:40:26,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47905512] [2020-12-23 00:40:26,308 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:40:26,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370467549] [2020-12-23 00:40:26,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:40:26,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-12-23 00:40:26,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611754207] [2020-12-23 00:40:26,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-23 00:40:26,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:40:26,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-23 00:40:26,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 00:40:26,310 INFO L87 Difference]: Start difference. First operand 180 states and 194 transitions. Second operand 47 states. [2020-12-23 00:40:27,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:40:27,613 INFO L93 Difference]: Finished difference Result 2156 states and 2549 transitions. [2020-12-23 00:40:27,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-23 00:40:27,614 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 173 [2020-12-23 00:40:27,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:40:27,624 INFO L225 Difference]: With dead ends: 2156 [2020-12-23 00:40:27,624 INFO L226 Difference]: Without dead ends: 2094 [2020-12-23 00:40:27,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 00:40:27,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2094 states. [2020-12-23 00:40:27,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2094 to 195. [2020-12-23 00:40:27,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-12-23 00:40:27,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 209 transitions. [2020-12-23 00:40:27,675 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 209 transitions. Word has length 173 [2020-12-23 00:40:27,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:40:27,676 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 209 transitions. [2020-12-23 00:40:27,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-23 00:40:27,676 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 209 transitions. [2020-12-23 00:40:27,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-12-23 00:40:27,677 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:40:27,677 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 44, 8, 8, 8, 7, 7, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 00:40:27,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 00:40:27,890 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:40:27,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:40:27,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1396027153, now seen corresponding path program 21 times [2020-12-23 00:40:27,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:40:27,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98676949] [2020-12-23 00:40:27,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:40:27,918 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:40:27,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [285695841] [2020-12-23 00:40:27,919 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 [2020-12-23 00:40:28,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-23 00:40:28,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:40:28,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:40:28,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:40:28,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3565 backedges. 611 proven. 26 refuted. 0 times theorem prover too weak. 2928 trivial. 0 not checked. [2020-12-23 00:40:28,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98676949] [2020-12-23 00:40:28,848 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:40:28,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285695841] [2020-12-23 00:40:28,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:40:28,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 00:40:28,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463698707] [2020-12-23 00:40:28,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:40:28,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:40:28,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:40:28,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:40:28,850 INFO L87 Difference]: Start difference. First operand 195 states and 209 transitions. Second operand 9 states. [2020-12-23 00:40:29,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:40:29,078 INFO L93 Difference]: Finished difference Result 371 states and 418 transitions. [2020-12-23 00:40:29,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:40:29,079 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 188 [2020-12-23 00:40:29,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:40:29,081 INFO L225 Difference]: With dead ends: 371 [2020-12-23 00:40:29,081 INFO L226 Difference]: Without dead ends: 323 [2020-12-23 00:40:29,082 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 [2020-12-23 00:40:29,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2020-12-23 00:40:29,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 198. [2020-12-23 00:40:29,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-12-23 00:40:29,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 213 transitions. [2020-12-23 00:40:29,119 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 213 transitions. Word has length 188 [2020-12-23 00:40:29,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:40:29,119 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 213 transitions. [2020-12-23 00:40:29,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:40:29,120 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 213 transitions. [2020-12-23 00:40:29,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-12-23 00:40:29,121 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:40:29,121 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 44, 8, 8, 8, 7, 7, 5, 1, 1, 1, 1, 1, 1] [2020-12-23 00:40:29,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 00:40:29,328 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:40:29,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:40:29,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1306542921, now seen corresponding path program 22 times [2020-12-23 00:40:29,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:40:29,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863185173] [2020-12-23 00:40:29,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:40:29,357 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:40:29,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1038644418] [2020-12-23 00:40:29,358 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 [2020-12-23 00:40:29,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:40:29,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:40:29,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-23 00:40:29,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:40:31,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3710 backedges. 3493 proven. 84 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-12-23 00:40:31,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863185173] [2020-12-23 00:40:31,441 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:40:31,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038644418] [2020-12-23 00:40:31,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:40:31,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-12-23 00:40:31,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685121480] [2020-12-23 00:40:31,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-23 00:40:31,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:40:31,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-23 00:40:31,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1319, Invalid=1437, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 00:40:31,444 INFO L87 Difference]: Start difference. First operand 198 states and 213 transitions. Second operand 53 states. [2020-12-23 00:40:35,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:40:35,134 INFO L93 Difference]: Finished difference Result 2137 states and 2525 transitions. [2020-12-23 00:40:35,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-23 00:40:35,135 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 191 [2020-12-23 00:40:35,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:40:35,141 INFO L225 Difference]: With dead ends: 2137 [2020-12-23 00:40:35,142 INFO L226 Difference]: Without dead ends: 2089 [2020-12-23 00:40:35,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2197, Invalid=2495, Unknown=0, NotChecked=0, Total=4692 [2020-12-23 00:40:35,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2020-12-23 00:40:35,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 201. [2020-12-23 00:40:35,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-12-23 00:40:35,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 217 transitions. [2020-12-23 00:40:35,189 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 217 transitions. Word has length 191 [2020-12-23 00:40:35,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:40:35,189 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 217 transitions. [2020-12-23 00:40:35,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-23 00:40:35,190 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 217 transitions. [2020-12-23 00:40:35,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-12-23 00:40:35,191 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:40:35,191 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 44, 8, 8, 8, 7, 7, 6, 1, 1, 1, 1, 1, 1] [2020-12-23 00:40:35,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 00:40:35,406 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:40:35,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:40:35,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1638489071, now seen corresponding path program 23 times [2020-12-23 00:40:35,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:40:35,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512545625] [2020-12-23 00:40:35,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:40:35,438 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:40:35,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [983796216] [2020-12-23 00:40:35,438 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