/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-programs/partial_mod_count_3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:39:26,683 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:39:26,685 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:39:26,725 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:39:26,726 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:39:26,730 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:39:26,733 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:39:26,738 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:39:26,742 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:39:26,747 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:39:26,751 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:39:26,752 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 00:39:26,753 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:39:26,756 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:39:26,758 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:39:26,759 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:39:26,760 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:39:26,761 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:39:26,763 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:39:26,765 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:39:26,767 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:39:26,768 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:39:26,770 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:39:26,771 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:39:26,774 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 00:39:26,800 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:39:26,801 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:39:26,802 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:39:26,803 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 00:39:26,830 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:39:26,830 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:39:26,832 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:39:26,832 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:39:26,832 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:39:26,833 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:39:26,833 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:39:26,833 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:39:26,833 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:39:26,834 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:39:26,834 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:39:26,834 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:39:26,834 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:39:26,835 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:39:26,835 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:39:26,835 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:39:26,835 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:39:26,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:39:26,836 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:39:26,836 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:39:26,836 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:39:26,837 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:39:26,837 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:39:26,837 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:39:26,837 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:39:26,837 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:39:27,196 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:39:27,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:39:27,234 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:39:27,236 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:39:27,236 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:39:27,237 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/partial_mod_count_3.c [2020-12-23 00:39:27,323 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b250efd6e/2a5a54fd63494a299f8c66531b3bb81a/FLAGbf4cecc95 [2020-12-23 00:39:27,895 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:39:27,896 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_3.c [2020-12-23 00:39:27,907 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b250efd6e/2a5a54fd63494a299f8c66531b3bb81a/FLAGbf4cecc95 [2020-12-23 00:39:28,251 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b250efd6e/2a5a54fd63494a299f8c66531b3bb81a [2020-12-23 00:39:28,262 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:39:28,266 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:39:28,270 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:39:28,271 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:39:28,275 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:39:28,277 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:39:28" (1/1) ... [2020-12-23 00:39:28,279 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a35f046 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:39:28, skipping insertion in model container [2020-12-23 00:39:28,279 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:39:28" (1/1) ... [2020-12-23 00:39:28,291 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:39:28,311 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 00:39:28,511 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_3.c[323,336] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 00:39:28,546 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:39:28,563 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 00:39:28,582 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_3.c[323,336] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 00:39:28,603 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:39:28,626 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:39:28,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:39:28 WrapperNode [2020-12-23 00:39:28,627 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:39:28,628 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:39:28,629 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:39:28,629 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:39:28,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:39:28" (1/1) ... [2020-12-23 00:39:28,648 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:39:28" (1/1) ... [2020-12-23 00:39:28,683 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:39:28,686 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:39:28,687 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:39:28,687 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:39:28,698 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:39:28" (1/1) ... [2020-12-23 00:39:28,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:39:28" (1/1) ... [2020-12-23 00:39:28,712 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:39:28" (1/1) ... [2020-12-23 00:39:28,713 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:39:28" (1/1) ... [2020-12-23 00:39:28,726 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:39:28" (1/1) ... [2020-12-23 00:39:28,738 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:39:28" (1/1) ... [2020-12-23 00:39:28,740 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:39:28" (1/1) ... [2020-12-23 00:39:28,746 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:39:28,747 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:39:28,747 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:39:28,748 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:39:28,752 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:39:28" (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 00:39:28,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:39:28,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:39:28,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:39:28,862 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:39:28,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:39:28,863 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:39:28,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 00:39:29,246 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:39:29,246 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-23 00:39:29,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:39:29 BoogieIcfgContainer [2020-12-23 00:39:29,251 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:39:29,253 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:39:29,253 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:39:29,259 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:39:29,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:39:28" (1/3) ... [2020-12-23 00:39:29,262 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@643b1480 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:39:29, skipping insertion in model container [2020-12-23 00:39:29,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:39:28" (2/3) ... [2020-12-23 00:39:29,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@643b1480 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:39:29, skipping insertion in model container [2020-12-23 00:39:29,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:39:29" (3/3) ... [2020-12-23 00:39:29,277 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_3.c [2020-12-23 00:39:29,292 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:39:29,297 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:39:29,324 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:39:29,372 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:39:29,372 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:39:29,372 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:39:29,373 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:39:29,373 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:39:29,373 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:39:29,373 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:39:29,373 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:39:29,393 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-12-23 00:39:29,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 00:39:29,399 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:29,400 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:29,401 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:29,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:29,409 INFO L82 PathProgramCache]: Analyzing trace with hash -694175938, now seen corresponding path program 1 times [2020-12-23 00:39:29,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:29,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409671566] [2020-12-23 00:39:29,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:29,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:39:29,648 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 00:39:29,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409671566] [2020-12-23 00:39:29,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:39:29,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 00:39:29,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954233900] [2020-12-23 00:39:29,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 00:39:29,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:29,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 00:39:29,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:39:29,687 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2020-12-23 00:39:29,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:29,706 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2020-12-23 00:39:29,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 00:39:29,707 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-12-23 00:39:29,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:29,720 INFO L225 Difference]: With dead ends: 29 [2020-12-23 00:39:29,720 INFO L226 Difference]: Without dead ends: 13 [2020-12-23 00:39:29,723 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 00:39:29,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-23 00:39:29,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-23 00:39:29,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-23 00:39:29,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2020-12-23 00:39:29,771 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 9 [2020-12-23 00:39:29,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:29,771 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2020-12-23 00:39:29,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 00:39:29,772 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2020-12-23 00:39:29,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 00:39:29,774 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:29,774 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:29,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 00:39:29,775 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:29,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:29,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1866781837, now seen corresponding path program 1 times [2020-12-23 00:39:29,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:29,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302670298] [2020-12-23 00:39:29,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:29,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:39:29,911 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 00:39:29,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302670298] [2020-12-23 00:39:29,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:39:29,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:39:29,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482021356] [2020-12-23 00:39:29,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:39:29,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:29,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:39:29,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:39:29,915 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand 4 states. [2020-12-23 00:39:29,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:29,980 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2020-12-23 00:39:29,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:39:29,981 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-23 00:39:29,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:29,982 INFO L225 Difference]: With dead ends: 34 [2020-12-23 00:39:29,982 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 00:39:29,983 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 00:39:29,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 00:39:29,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 15. [2020-12-23 00:39:29,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-23 00:39:29,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2020-12-23 00:39:29,988 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 9 [2020-12-23 00:39:29,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:29,989 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2020-12-23 00:39:29,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:39:29,989 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2020-12-23 00:39:29,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 00:39:29,990 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:29,990 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:29,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 00:39:29,990 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:29,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:29,991 INFO L82 PathProgramCache]: Analyzing trace with hash 97563565, now seen corresponding path program 1 times [2020-12-23 00:39:29,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:29,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061046559] [2020-12-23 00:39:29,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:30,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:39:30,086 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 00:39:30,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061046559] [2020-12-23 00:39:30,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214868050] [2020-12-23 00:39:30,087 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 00:39:30,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:39:30,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:39:30,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:30,240 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 00:39:30,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:39:30,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-23 00:39:30,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973430127] [2020-12-23 00:39:30,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:39:30,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:30,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:39:30,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:39:30,243 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 7 states. [2020-12-23 00:39:30,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:30,310 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2020-12-23 00:39:30,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:39:30,311 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-12-23 00:39:30,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:30,312 INFO L225 Difference]: With dead ends: 44 [2020-12-23 00:39:30,312 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 00:39:30,313 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 00:39:30,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 00:39:30,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 18. [2020-12-23 00:39:30,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 00:39:30,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-12-23 00:39:30,318 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2020-12-23 00:39:30,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:30,319 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-12-23 00:39:30,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:39:30,319 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-12-23 00:39:30,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 00:39:30,320 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:30,320 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:30,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 00:39:30,536 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:30,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:30,537 INFO L82 PathProgramCache]: Analyzing trace with hash 982026547, now seen corresponding path program 2 times [2020-12-23 00:39:30,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:30,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220178073] [2020-12-23 00:39:30,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:30,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:39:30,647 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 00:39:30,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220178073] [2020-12-23 00:39:30,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248943921] [2020-12-23 00:39:30,651 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 00:39:30,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 00:39:30,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:30,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:39:30,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:30,793 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:39:30,812 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:39:30,824 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 00:39:30,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:30,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2020-12-23 00:39:30,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240860223] [2020-12-23 00:39:30,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:39:30,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:30,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:39:30,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:39:30,827 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 6 states. [2020-12-23 00:39:30,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:30,915 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-12-23 00:39:30,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 00:39:30,916 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-12-23 00:39:30,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:30,917 INFO L225 Difference]: With dead ends: 35 [2020-12-23 00:39:30,917 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 00:39:30,918 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 00:39:30,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 00:39:30,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2020-12-23 00:39:30,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 00:39:30,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-12-23 00:39:30,943 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 15 [2020-12-23 00:39:30,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:30,943 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-12-23 00:39:30,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:39:30,944 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-12-23 00:39:30,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 00:39:30,944 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:30,944 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:31,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:31,158 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:31,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:31,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1305492527, now seen corresponding path program 1 times [2020-12-23 00:39:31,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:31,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096056086] [2020-12-23 00:39:31,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:31,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:39:31,224 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 00:39:31,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096056086] [2020-12-23 00:39:31,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472084345] [2020-12-23 00:39:31,225 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 00:39:31,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:39:31,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:39:31,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:31,409 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 00:39:31,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:39:31,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-23 00:39:31,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555840877] [2020-12-23 00:39:31,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:39:31,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:31,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:39:31,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:39:31,415 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 9 states. [2020-12-23 00:39:31,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:31,511 INFO L93 Difference]: Finished difference Result 93 states and 111 transitions. [2020-12-23 00:39:31,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:39:31,511 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-12-23 00:39:31,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:31,516 INFO L225 Difference]: With dead ends: 93 [2020-12-23 00:39:31,516 INFO L226 Difference]: Without dead ends: 72 [2020-12-23 00:39:31,517 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 00:39:31,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-23 00:39:31,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 31. [2020-12-23 00:39:31,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 00:39:31,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-12-23 00:39:31,529 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 20 [2020-12-23 00:39:31,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:31,529 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-12-23 00:39:31,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:39:31,529 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-12-23 00:39:31,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 00:39:31,530 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:31,530 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:31,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:31,745 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:31,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:31,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1739926453, now seen corresponding path program 2 times [2020-12-23 00:39:31,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:31,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459434543] [2020-12-23 00:39:31,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:31,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:39:31,897 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 00:39:31,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459434543] [2020-12-23 00:39:31,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134204019] [2020-12-23 00:39:31,900 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 00:39:31,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:39:31,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:31,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:39:31,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:32,048 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 00:39:32,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:39:32,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-23 00:39:32,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972040439] [2020-12-23 00:39:32,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:39:32,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:32,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:39:32,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:39:32,055 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 11 states. [2020-12-23 00:39:32,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:32,155 INFO L93 Difference]: Finished difference Result 113 states and 134 transitions. [2020-12-23 00:39:32,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:39:32,156 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2020-12-23 00:39:32,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:32,157 INFO L225 Difference]: With dead ends: 113 [2020-12-23 00:39:32,157 INFO L226 Difference]: Without dead ends: 92 [2020-12-23 00:39:32,158 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 00:39:32,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-23 00:39:32,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 34. [2020-12-23 00:39:32,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 00:39:32,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-12-23 00:39:32,165 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 23 [2020-12-23 00:39:32,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:32,166 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-12-23 00:39:32,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:39:32,166 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-12-23 00:39:32,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 00:39:32,167 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:32,167 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:32,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:32,382 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:32,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:32,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1070414225, now seen corresponding path program 3 times [2020-12-23 00:39:32,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:32,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432892831] [2020-12-23 00:39:32,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:32,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:39:32,461 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 00:39:32,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432892831] [2020-12-23 00:39:32,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345678656] [2020-12-23 00:39:32,462 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 00:39:32,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 00:39:32,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:32,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:39:32,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:32,662 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 00:39:32,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:32,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2020-12-23 00:39:32,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626413659] [2020-12-23 00:39:32,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:39:32,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:32,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:39:32,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:39:32,665 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 5 states. [2020-12-23 00:39:32,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:32,746 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2020-12-23 00:39:32,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:39:32,747 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-12-23 00:39:32,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:32,749 INFO L225 Difference]: With dead ends: 79 [2020-12-23 00:39:32,749 INFO L226 Difference]: Without dead ends: 61 [2020-12-23 00:39:32,751 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 00:39:32,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-23 00:39:32,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 36. [2020-12-23 00:39:32,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 00:39:32,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-12-23 00:39:32,769 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 26 [2020-12-23 00:39:32,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:32,769 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-12-23 00:39:32,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:39:32,770 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-12-23 00:39:32,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 00:39:32,771 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:32,771 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:32,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 00:39:32,988 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:32,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:32,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1120934345, now seen corresponding path program 1 times [2020-12-23 00:39:32,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:32,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247873608] [2020-12-23 00:39:32,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:33,007 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:33,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [930455335] [2020-12-23 00:39:33,008 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 00:39:33,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:39:33,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:39:33,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:33,224 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 00:39:33,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247873608] [2020-12-23 00:39:33,225 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:33,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930455335] [2020-12-23 00:39:33,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:33,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 00:39:33,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589381980] [2020-12-23 00:39:33,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:39:33,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:33,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:39:33,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:39:33,227 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 9 states. [2020-12-23 00:39:33,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:33,346 INFO L93 Difference]: Finished difference Result 157 states and 184 transitions. [2020-12-23 00:39:33,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:39:33,347 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-12-23 00:39:33,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:33,348 INFO L225 Difference]: With dead ends: 157 [2020-12-23 00:39:33,348 INFO L226 Difference]: Without dead ends: 134 [2020-12-23 00:39:33,349 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 00:39:33,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-23 00:39:33,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 42. [2020-12-23 00:39:33,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 00:39:33,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2020-12-23 00:39:33,357 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 29 [2020-12-23 00:39:33,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:33,357 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2020-12-23 00:39:33,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:39:33,358 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2020-12-23 00:39:33,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 00:39:33,358 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:33,359 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:33,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:33,573 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:33,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:33,574 INFO L82 PathProgramCache]: Analyzing trace with hash -2107317257, now seen corresponding path program 2 times [2020-12-23 00:39:33,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:33,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217844615] [2020-12-23 00:39:33,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:33,597 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:33,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [973965375] [2020-12-23 00:39:33,598 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 00:39:33,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:39:33,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:33,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:39:33,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:33,817 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 00:39:33,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217844615] [2020-12-23 00:39:33,818 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:33,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973965375] [2020-12-23 00:39:33,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:33,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 00:39:33,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880740341] [2020-12-23 00:39:33,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:39:33,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:33,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:39:33,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:39:33,821 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 11 states. [2020-12-23 00:39:33,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:33,985 INFO L93 Difference]: Finished difference Result 197 states and 230 transitions. [2020-12-23 00:39:33,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:39:33,986 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-12-23 00:39:33,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:33,987 INFO L225 Difference]: With dead ends: 197 [2020-12-23 00:39:33,987 INFO L226 Difference]: Without dead ends: 174 [2020-12-23 00:39:33,988 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 00:39:33,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-12-23 00:39:33,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 48. [2020-12-23 00:39:33,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 00:39:33,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-12-23 00:39:33,996 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 35 [2020-12-23 00:39:33,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:33,997 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-12-23 00:39:33,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:39:33,997 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-12-23 00:39:33,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 00:39:33,998 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:33,998 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:34,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:34,213 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:34,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:34,214 INFO L82 PathProgramCache]: Analyzing trace with hash -975924809, now seen corresponding path program 3 times [2020-12-23 00:39:34,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:34,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276874844] [2020-12-23 00:39:34,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:34,230 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:34,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [289272583] [2020-12-23 00:39:34,230 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 00:39:34,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 00:39:34,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:34,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 00:39:34,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:34,400 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:39:34,406 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:39:34,418 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 00:39:34,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276874844] [2020-12-23 00:39:34,419 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:34,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289272583] [2020-12-23 00:39:34,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:34,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 00:39:34,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41941237] [2020-12-23 00:39:34,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 00:39:34,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:34,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 00:39:34,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:39:34,421 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 8 states. [2020-12-23 00:39:34,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:34,529 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2020-12-23 00:39:34,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:39:34,530 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-12-23 00:39:34,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:34,531 INFO L225 Difference]: With dead ends: 60 [2020-12-23 00:39:34,531 INFO L226 Difference]: Without dead ends: 58 [2020-12-23 00:39:34,531 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 00:39:34,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-23 00:39:34,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2020-12-23 00:39:34,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-23 00:39:34,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2020-12-23 00:39:34,538 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 41 [2020-12-23 00:39:34,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:34,539 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2020-12-23 00:39:34,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 00:39:34,539 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2020-12-23 00:39:34,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 00:39:34,540 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:34,540 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:34,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 00:39:34,754 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:34,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:34,755 INFO L82 PathProgramCache]: Analyzing trace with hash 2047403563, now seen corresponding path program 4 times [2020-12-23 00:39:34,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:34,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666607295] [2020-12-23 00:39:34,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:34,777 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:34,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1890080356] [2020-12-23 00:39:34,777 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 00:39:34,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:39:34,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:34,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 00:39:34,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:35,086 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 00:39:35,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666607295] [2020-12-23 00:39:35,086 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:35,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890080356] [2020-12-23 00:39:35,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:35,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-23 00:39:35,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370555288] [2020-12-23 00:39:35,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 00:39:35,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:35,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 00:39:35,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=87, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:39:35,089 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 13 states. [2020-12-23 00:39:35,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:35,366 INFO L93 Difference]: Finished difference Result 211 states and 246 transitions. [2020-12-23 00:39:35,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 00:39:35,366 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2020-12-23 00:39:35,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:35,368 INFO L225 Difference]: With dead ends: 211 [2020-12-23 00:39:35,368 INFO L226 Difference]: Without dead ends: 188 [2020-12-23 00:39:35,369 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 00:39:35,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-12-23 00:39:35,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 56. [2020-12-23 00:39:35,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-23 00:39:35,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2020-12-23 00:39:35,378 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 46 [2020-12-23 00:39:35,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:35,378 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2020-12-23 00:39:35,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 00:39:35,378 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2020-12-23 00:39:35,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 00:39:35,379 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:35,379 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 8, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:35,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:35,595 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:35,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:35,596 INFO L82 PathProgramCache]: Analyzing trace with hash -520854285, now seen corresponding path program 5 times [2020-12-23 00:39:35,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:35,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183398181] [2020-12-23 00:39:35,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:35,611 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:35,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [290270274] [2020-12-23 00:39:35,611 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 00:39:35,867 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-12-23 00:39:35,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:35,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 00:39:35,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:36,079 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 00:39:36,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183398181] [2020-12-23 00:39:36,080 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:36,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290270274] [2020-12-23 00:39:36,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:36,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-23 00:39:36,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841254989] [2020-12-23 00:39:36,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 00:39:36,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:36,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 00:39:36,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:39:36,083 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand 14 states. [2020-12-23 00:39:36,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:36,299 INFO L93 Difference]: Finished difference Result 314 states and 369 transitions. [2020-12-23 00:39:36,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 00:39:36,299 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-12-23 00:39:36,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:36,301 INFO L225 Difference]: With dead ends: 314 [2020-12-23 00:39:36,301 INFO L226 Difference]: Without dead ends: 283 [2020-12-23 00:39:36,302 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 00:39:36,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-12-23 00:39:36,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 65. [2020-12-23 00:39:36,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-23 00:39:36,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2020-12-23 00:39:36,312 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 49 [2020-12-23 00:39:36,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:36,312 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2020-12-23 00:39:36,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 00:39:36,313 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2020-12-23 00:39:36,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-23 00:39:36,314 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:36,314 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:36,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:36,520 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:36,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:36,521 INFO L82 PathProgramCache]: Analyzing trace with hash -69913235, now seen corresponding path program 6 times [2020-12-23 00:39:36,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:36,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369780015] [2020-12-23 00:39:36,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:36,536 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:36,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [485779394] [2020-12-23 00:39:36,536 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 00:39:36,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-23 00:39:36,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:36,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 00:39:36,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:36,767 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 00:39:36,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369780015] [2020-12-23 00:39:36,768 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:36,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485779394] [2020-12-23 00:39:36,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:36,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 00:39:36,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937732684] [2020-12-23 00:39:36,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:39:36,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:36,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:39:36,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:39:36,771 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand 9 states. [2020-12-23 00:39:36,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:36,885 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2020-12-23 00:39:36,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:39:36,885 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-12-23 00:39:36,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:36,886 INFO L225 Difference]: With dead ends: 77 [2020-12-23 00:39:36,886 INFO L226 Difference]: Without dead ends: 75 [2020-12-23 00:39:36,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:39:36,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-23 00:39:36,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2020-12-23 00:39:36,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-23 00:39:36,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2020-12-23 00:39:36,895 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 58 [2020-12-23 00:39:36,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:36,895 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2020-12-23 00:39:36,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:39:36,895 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2020-12-23 00:39:36,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-23 00:39:36,896 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:36,897 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:37,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 00:39:37,111 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:37,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:37,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1619534901, now seen corresponding path program 7 times [2020-12-23 00:39:37,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:37,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115368243] [2020-12-23 00:39:37,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:37,128 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:37,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1374216614] [2020-12-23 00:39:37,128 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 00:39:37,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:39:37,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 00:39:37,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:37,557 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 00:39:37,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115368243] [2020-12-23 00:39:37,557 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:37,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374216614] [2020-12-23 00:39:37,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:37,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-12-23 00:39:37,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968948197] [2020-12-23 00:39:37,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 00:39:37,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:37,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 00:39:37,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:39:37,560 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand 17 states. [2020-12-23 00:39:37,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:37,805 INFO L93 Difference]: Finished difference Result 450 states and 529 transitions. [2020-12-23 00:39:37,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 00:39:37,806 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2020-12-23 00:39:37,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:37,809 INFO L225 Difference]: With dead ends: 450 [2020-12-23 00:39:37,809 INFO L226 Difference]: Without dead ends: 414 [2020-12-23 00:39:37,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:39:37,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2020-12-23 00:39:37,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 79. [2020-12-23 00:39:37,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-23 00:39:37,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2020-12-23 00:39:37,821 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 63 [2020-12-23 00:39:37,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:37,821 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2020-12-23 00:39:37,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 00:39:37,821 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2020-12-23 00:39:37,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-23 00:39:37,822 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:37,823 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 14, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:38,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 00:39:38,038 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:38,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:38,039 INFO L82 PathProgramCache]: Analyzing trace with hash 206411567, now seen corresponding path program 8 times [2020-12-23 00:39:38,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:38,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502728671] [2020-12-23 00:39:38,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:38,057 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:38,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1766981803] [2020-12-23 00:39:38,058 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 00:39:38,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:39:38,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:38,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 00:39:38,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:38,538 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 00:39:38,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502728671] [2020-12-23 00:39:38,539 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:38,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766981803] [2020-12-23 00:39:38,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:38,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-12-23 00:39:38,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141700935] [2020-12-23 00:39:38,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 00:39:38,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:38,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 00:39:38,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 00:39:38,541 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand 20 states. [2020-12-23 00:39:38,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:38,847 INFO L93 Difference]: Finished difference Result 540 states and 634 transitions. [2020-12-23 00:39:38,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 00:39:38,847 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 72 [2020-12-23 00:39:38,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:38,850 INFO L225 Difference]: With dead ends: 540 [2020-12-23 00:39:38,850 INFO L226 Difference]: Without dead ends: 504 [2020-12-23 00:39:38,851 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 00:39:38,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2020-12-23 00:39:38,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 88. [2020-12-23 00:39:38,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-23 00:39:38,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2020-12-23 00:39:38,864 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 72 [2020-12-23 00:39:38,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:38,864 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2020-12-23 00:39:38,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 00:39:38,864 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2020-12-23 00:39:38,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-23 00:39:38,865 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:38,865 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 17, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:39,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 00:39:39,079 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:39,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:39,080 INFO L82 PathProgramCache]: Analyzing trace with hash 306240885, now seen corresponding path program 9 times [2020-12-23 00:39:39,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:39,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754212372] [2020-12-23 00:39:39,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:39,112 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:39,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1508511567] [2020-12-23 00:39:39,116 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 00:39:39,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 00:39:39,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:39,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 00:39:39,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:39,403 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 00:39:39,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754212372] [2020-12-23 00:39:39,404 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:39,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508511567] [2020-12-23 00:39:39,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:39,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 00:39:39,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285764337] [2020-12-23 00:39:39,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 00:39:39,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:39,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 00:39:39,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:39:39,406 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand 10 states. [2020-12-23 00:39:39,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:39,544 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2020-12-23 00:39:39,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:39:39,545 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 81 [2020-12-23 00:39:39,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:39,546 INFO L225 Difference]: With dead ends: 100 [2020-12-23 00:39:39,546 INFO L226 Difference]: Without dead ends: 98 [2020-12-23 00:39:39,547 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 00:39:39,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-23 00:39:39,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2020-12-23 00:39:39,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-23 00:39:39,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2020-12-23 00:39:39,556 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 81 [2020-12-23 00:39:39,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:39,556 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2020-12-23 00:39:39,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 00:39:39,556 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2020-12-23 00:39:39,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-23 00:39:39,557 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:39,557 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 17, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:39,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:39,771 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:39,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:39,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1355563309, now seen corresponding path program 10 times [2020-12-23 00:39:39,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:39,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023889673] [2020-12-23 00:39:39,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:39,790 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:39,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1396027667] [2020-12-23 00:39:39,790 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 00:39:39,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:39:39,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:39,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 00:39:39,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:40,372 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 00:39:40,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023889673] [2020-12-23 00:39:40,372 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:40,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396027667] [2020-12-23 00:39:40,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:40,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-12-23 00:39:40,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098715837] [2020-12-23 00:39:40,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 00:39:40,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:40,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 00:39:40,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-12-23 00:39:40,375 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand 23 states. [2020-12-23 00:39:41,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:41,110 INFO L93 Difference]: Finished difference Result 580 states and 680 transitions. [2020-12-23 00:39:41,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 00:39:41,110 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 86 [2020-12-23 00:39:41,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:41,113 INFO L225 Difference]: With dead ends: 580 [2020-12-23 00:39:41,113 INFO L226 Difference]: Without dead ends: 547 [2020-12-23 00:39:41,114 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 00:39:41,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2020-12-23 00:39:41,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 96. [2020-12-23 00:39:41,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-23 00:39:41,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2020-12-23 00:39:41,128 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 86 [2020-12-23 00:39:41,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:41,128 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2020-12-23 00:39:41,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 00:39:41,128 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2020-12-23 00:39:41,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-23 00:39:41,129 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:41,130 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 17, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:41,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 00:39:41,343 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:41,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:41,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1036957617, now seen corresponding path program 11 times [2020-12-23 00:39:41,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:41,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042279881] [2020-12-23 00:39:41,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:41,371 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:41,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1534720914] [2020-12-23 00:39:41,372 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 00:39:42,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2020-12-23 00:39:42,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:42,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 00:39:42,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:42,539 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 00:39:42,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042279881] [2020-12-23 00:39:42,540 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:42,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534720914] [2020-12-23 00:39:42,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:42,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-12-23 00:39:42,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447051847] [2020-12-23 00:39:42,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 00:39:42,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:42,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 00:39:42,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 00:39:42,543 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand 24 states. [2020-12-23 00:39:42,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:42,970 INFO L93 Difference]: Finished difference Result 757 states and 892 transitions. [2020-12-23 00:39:42,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 00:39:42,971 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 89 [2020-12-23 00:39:42,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:42,974 INFO L225 Difference]: With dead ends: 757 [2020-12-23 00:39:42,974 INFO L226 Difference]: Without dead ends: 713 [2020-12-23 00:39:42,975 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 00:39:42,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2020-12-23 00:39:42,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 108. [2020-12-23 00:39:42,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-23 00:39:42,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 118 transitions. [2020-12-23 00:39:42,989 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 118 transitions. Word has length 89 [2020-12-23 00:39:42,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:42,990 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 118 transitions. [2020-12-23 00:39:42,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 00:39:42,990 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 118 transitions. [2020-12-23 00:39:42,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-23 00:39:42,991 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:42,991 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 21, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:43,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 00:39:43,205 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:43,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:43,206 INFO L82 PathProgramCache]: Analyzing trace with hash -445045967, now seen corresponding path program 12 times [2020-12-23 00:39:43,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:43,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364208009] [2020-12-23 00:39:43,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:43,260 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:43,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [960614607] [2020-12-23 00:39:43,260 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 00:39:43,445 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-23 00:39:43,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:43,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 00:39:43,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:43,680 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 00:39:43,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364208009] [2020-12-23 00:39:43,681 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:43,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960614607] [2020-12-23 00:39:43,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:43,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 00:39:43,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198872562] [2020-12-23 00:39:43,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:39:43,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:43,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:39:43,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:39:43,682 INFO L87 Difference]: Start difference. First operand 108 states and 118 transitions. Second operand 11 states. [2020-12-23 00:39:43,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:43,867 INFO L93 Difference]: Finished difference Result 120 states and 132 transitions. [2020-12-23 00:39:43,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 00:39:43,867 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 101 [2020-12-23 00:39:43,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:43,870 INFO L225 Difference]: With dead ends: 120 [2020-12-23 00:39:43,870 INFO L226 Difference]: Without dead ends: 118 [2020-12-23 00:39:43,870 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 00:39:43,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-23 00:39:43,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 113. [2020-12-23 00:39:43,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-23 00:39:43,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 124 transitions. [2020-12-23 00:39:43,883 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 124 transitions. Word has length 101 [2020-12-23 00:39:43,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:43,883 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 124 transitions. [2020-12-23 00:39:43,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:39:43,884 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 124 transitions. [2020-12-23 00:39:43,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-23 00:39:43,885 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:43,885 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 21, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:44,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:44,100 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:44,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:44,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1077530383, now seen corresponding path program 13 times [2020-12-23 00:39:44,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:44,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86896110] [2020-12-23 00:39:44,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:44,122 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:44,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [828247475] [2020-12-23 00:39:44,122 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 00:39:44,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:39:44,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 00:39:44,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:44,917 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 00:39:44,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86896110] [2020-12-23 00:39:44,918 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:44,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828247475] [2020-12-23 00:39:44,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:44,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-12-23 00:39:44,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709424044] [2020-12-23 00:39:44,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 00:39:44,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:44,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 00:39:44,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 00:39:44,937 INFO L87 Difference]: Start difference. First operand 113 states and 124 transitions. Second operand 28 states. [2020-12-23 00:39:45,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:45,479 INFO L93 Difference]: Finished difference Result 1003 states and 1183 transitions. [2020-12-23 00:39:45,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 00:39:45,480 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 106 [2020-12-23 00:39:45,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:45,485 INFO L225 Difference]: With dead ends: 1003 [2020-12-23 00:39:45,485 INFO L226 Difference]: Without dead ends: 954 [2020-12-23 00:39:45,486 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 00:39:45,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2020-12-23 00:39:45,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 125. [2020-12-23 00:39:45,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-23 00:39:45,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 136 transitions. [2020-12-23 00:39:45,504 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 136 transitions. Word has length 106 [2020-12-23 00:39:45,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:45,504 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 136 transitions. [2020-12-23 00:39:45,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 00:39:45,505 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 136 transitions. [2020-12-23 00:39:45,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-23 00:39:45,506 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:45,506 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 25, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:45,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:45,720 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:45,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:45,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1674589553, now seen corresponding path program 14 times [2020-12-23 00:39:45,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:45,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080867225] [2020-12-23 00:39:45,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:45,745 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:45,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [497688655] [2020-12-23 00:39:45,745 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 00:39:45,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:39:45,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:45,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 00:39:45,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:46,806 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 00:39:46,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080867225] [2020-12-23 00:39:46,807 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:46,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497688655] [2020-12-23 00:39:46,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:46,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-12-23 00:39:46,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504556987] [2020-12-23 00:39:46,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 00:39:46,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:46,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 00:39:46,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-23 00:39:46,809 INFO L87 Difference]: Start difference. First operand 125 states and 136 transitions. Second operand 32 states. [2020-12-23 00:39:47,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:47,392 INFO L93 Difference]: Finished difference Result 1163 states and 1371 transitions. [2020-12-23 00:39:47,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 00:39:47,393 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 118 [2020-12-23 00:39:47,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:47,398 INFO L225 Difference]: With dead ends: 1163 [2020-12-23 00:39:47,399 INFO L226 Difference]: Without dead ends: 1114 [2020-12-23 00:39:47,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-23 00:39:47,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2020-12-23 00:39:47,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 137. [2020-12-23 00:39:47,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-23 00:39:47,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 148 transitions. [2020-12-23 00:39:47,420 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 148 transitions. Word has length 118 [2020-12-23 00:39:47,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:47,421 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 148 transitions. [2020-12-23 00:39:47,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 00:39:47,421 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 148 transitions. [2020-12-23 00:39:47,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-23 00:39:47,422 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:47,422 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 29, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:47,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:47,637 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:47,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:47,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1770554895, now seen corresponding path program 15 times [2020-12-23 00:39:47,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:47,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365978907] [2020-12-23 00:39:47,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:47,658 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:47,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [335059879] [2020-12-23 00:39:47,659 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 00:39:47,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 00:39:47,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:47,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 00:39:47,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:48,201 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 00:39:48,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365978907] [2020-12-23 00:39:48,202 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:48,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335059879] [2020-12-23 00:39:48,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:48,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-23 00:39:48,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649262435] [2020-12-23 00:39:48,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 00:39:48,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:48,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 00:39:48,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:39:48,204 INFO L87 Difference]: Start difference. First operand 137 states and 148 transitions. Second operand 12 states. [2020-12-23 00:39:48,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:48,412 INFO L93 Difference]: Finished difference Result 149 states and 162 transitions. [2020-12-23 00:39:48,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 00:39:48,415 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 130 [2020-12-23 00:39:48,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:48,417 INFO L225 Difference]: With dead ends: 149 [2020-12-23 00:39:48,417 INFO L226 Difference]: Without dead ends: 147 [2020-12-23 00:39:48,417 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 00:39:48,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-12-23 00:39:48,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 142. [2020-12-23 00:39:48,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-12-23 00:39:48,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 154 transitions. [2020-12-23 00:39:48,433 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 154 transitions. Word has length 130 [2020-12-23 00:39:48,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:48,434 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 154 transitions. [2020-12-23 00:39:48,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 00:39:48,434 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 154 transitions. [2020-12-23 00:39:48,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-23 00:39:48,435 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:48,435 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 29, 7, 7, 7, 6, 6, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:48,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 00:39:48,651 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:48,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:48,652 INFO L82 PathProgramCache]: Analyzing trace with hash 99619377, now seen corresponding path program 16 times [2020-12-23 00:39:48,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:48,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91772892] [2020-12-23 00:39:48,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:48,679 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:48,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1991273110] [2020-12-23 00:39:48,679 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 00:39:48,768 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:39:48,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:48,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 00:39:48,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:49,838 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 00:39:49,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91772892] [2020-12-23 00:39:49,839 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:49,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991273110] [2020-12-23 00:39:49,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:49,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-12-23 00:39:49,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689401945] [2020-12-23 00:39:49,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 00:39:49,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:49,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 00:39:49,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=665, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 00:39:49,842 INFO L87 Difference]: Start difference. First operand 142 states and 154 transitions. Second operand 36 states. [2020-12-23 00:39:51,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:51,155 INFO L93 Difference]: Finished difference Result 1247 states and 1469 transitions. [2020-12-23 00:39:51,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 00:39:51,156 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 135 [2020-12-23 00:39:51,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:51,162 INFO L225 Difference]: With dead ends: 1247 [2020-12-23 00:39:51,162 INFO L226 Difference]: Without dead ends: 1204 [2020-12-23 00:39:51,164 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 00:39:51,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2020-12-23 00:39:51,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 145. [2020-12-23 00:39:51,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-12-23 00:39:51,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 158 transitions. [2020-12-23 00:39:51,188 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 158 transitions. Word has length 135 [2020-12-23 00:39:51,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:51,188 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 158 transitions. [2020-12-23 00:39:51,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 00:39:51,188 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 158 transitions. [2020-12-23 00:39:51,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-23 00:39:51,189 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:51,189 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 29, 7, 7, 7, 6, 6, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:51,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 00:39:51,403 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:51,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:51,404 INFO L82 PathProgramCache]: Analyzing trace with hash -274498259, now seen corresponding path program 17 times [2020-12-23 00:39:51,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:51,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222658] [2020-12-23 00:39:51,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:51,426 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:51,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [825741719] [2020-12-23 00:39:51,426 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 00:39:56,915 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2020-12-23 00:39:56,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:56,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 00:39:56,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:39:58,085 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 00:39:58,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222658] [2020-12-23 00:39:58,085 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:39:58,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825741719] [2020-12-23 00:39:58,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:39:58,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-12-23 00:39:58,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559170181] [2020-12-23 00:39:58,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 00:39:58,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:39:58,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 00:39:58,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 00:39:58,088 INFO L87 Difference]: Start difference. First operand 145 states and 158 transitions. Second operand 37 states. [2020-12-23 00:39:58,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:39:58,951 INFO L93 Difference]: Finished difference Result 1515 states and 1790 transitions. [2020-12-23 00:39:58,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 00:39:58,952 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 138 [2020-12-23 00:39:58,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:39:58,958 INFO L225 Difference]: With dead ends: 1515 [2020-12-23 00:39:58,958 INFO L226 Difference]: Without dead ends: 1458 [2020-12-23 00:39:58,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 00:39:58,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2020-12-23 00:39:58,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 160. [2020-12-23 00:39:58,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-12-23 00:39:58,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 173 transitions. [2020-12-23 00:39:58,986 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 173 transitions. Word has length 138 [2020-12-23 00:39:58,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:39:58,986 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 173 transitions. [2020-12-23 00:39:58,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 00:39:58,986 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 173 transitions. [2020-12-23 00:39:58,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-23 00:39:58,987 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:39:58,987 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 34, 7, 7, 7, 6, 6, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 00:39:59,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:39:59,201 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:39:59,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:39:59,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1459861581, now seen corresponding path program 18 times [2020-12-23 00:39:59,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:39:59,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822360218] [2020-12-23 00:39:59,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:39:59,237 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:39:59,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1865134690] [2020-12-23 00:39:59,238 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:39:59,828 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 00:39:59,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:39:59,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 00:39:59,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:40:00,174 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 00:40:00,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822360218] [2020-12-23 00:40:00,175 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:40:00,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865134690] [2020-12-23 00:40:00,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:40:00,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-23 00:40:00,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104688443] [2020-12-23 00:40:00,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 00:40:00,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:40:00,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 00:40:00,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:40:00,177 INFO L87 Difference]: Start difference. First operand 160 states and 173 transitions. Second operand 13 states. [2020-12-23 00:40:00,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:40:00,422 INFO L93 Difference]: Finished difference Result 172 states and 187 transitions. [2020-12-23 00:40:00,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 00:40:00,423 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 153 [2020-12-23 00:40:00,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:40:00,424 INFO L225 Difference]: With dead ends: 172 [2020-12-23 00:40:00,424 INFO L226 Difference]: Without dead ends: 170 [2020-12-23 00:40:00,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-12-23 00:40:00,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-12-23 00:40:00,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 165. [2020-12-23 00:40:00,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-12-23 00:40:00,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 179 transitions. [2020-12-23 00:40:00,442 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 179 transitions. Word has length 153 [2020-12-23 00:40:00,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:40:00,443 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 179 transitions. [2020-12-23 00:40:00,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 00:40:00,443 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 179 transitions. [2020-12-23 00:40:00,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-12-23 00:40:00,444 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:40:00,444 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 34, 8, 8, 8, 7, 7, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 00:40:00,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 00:40:00,651 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:40:00,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:40:00,652 INFO L82 PathProgramCache]: Analyzing trace with hash 40865199, now seen corresponding path program 19 times [2020-12-23 00:40:00,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:40:00,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117369789] [2020-12-23 00:40:00,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:40:00,674 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:40:00,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1252884219] [2020-12-23 00:40:00,674 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 00:40:00,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:40:00,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 00:40:00,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:40:02,329 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 00:40:02,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117369789] [2020-12-23 00:40:02,329 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:40:02,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252884219] [2020-12-23 00:40:02,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:40:02,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-12-23 00:40:02,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344837992] [2020-12-23 00:40:02,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-23 00:40:02,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:40:02,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-23 00:40:02,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 00:40:02,331 INFO L87 Difference]: Start difference. First operand 165 states and 179 transitions. Second operand 42 states. [2020-12-23 00:40:03,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:40:03,478 INFO L93 Difference]: Finished difference Result 1906 states and 2254 transitions. [2020-12-23 00:40:03,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 00:40:03,479 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 158 [2020-12-23 00:40:03,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:40:03,487 INFO L225 Difference]: With dead ends: 1906 [2020-12-23 00:40:03,487 INFO L226 Difference]: Without dead ends: 1844 [2020-12-23 00:40:03,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 00:40:03,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2020-12-23 00:40:03,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 180. [2020-12-23 00:40:03,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-12-23 00:40:03,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 194 transitions. [2020-12-23 00:40:03,533 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 194 transitions. Word has length 158 [2020-12-23 00:40:03,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:40:03,534 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 194 transitions. [2020-12-23 00:40:03,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-23 00:40:03,534 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 194 transitions. [2020-12-23 00:40:03,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-12-23 00:40:03,535 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:40:03,535 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 39, 8, 8, 8, 7, 7, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 00:40:03,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:40:03,749 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:40:03,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:40:03,750 INFO L82 PathProgramCache]: Analyzing trace with hash -376448715, now seen corresponding path program 20 times [2020-12-23 00:40:03,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:40:03,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100558345] [2020-12-23 00:40:03,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:40:03,776 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:40:03,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [866270608] [2020-12-23 00:40:03,776 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 00:40:03,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:40:03,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:40:03,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-23 00:40:03,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:40:05,697 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 00:40:05,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100558345] [2020-12-23 00:40:05,697 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:40:05,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866270608] [2020-12-23 00:40:05,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:40:05,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-12-23 00:40:05,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807675461] [2020-12-23 00:40:05,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-23 00:40:05,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:40:05,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-23 00:40:05,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 00:40:05,702 INFO L87 Difference]: Start difference. First operand 180 states and 194 transitions. Second operand 47 states. [2020-12-23 00:40:07,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:40:07,006 INFO L93 Difference]: Finished difference Result 2156 states and 2549 transitions. [2020-12-23 00:40:07,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-23 00:40:07,006 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 173 [2020-12-23 00:40:07,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:40:07,013 INFO L225 Difference]: With dead ends: 2156 [2020-12-23 00:40:07,013 INFO L226 Difference]: Without dead ends: 2094 [2020-12-23 00:40:07,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 00:40:07,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2094 states. [2020-12-23 00:40:07,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2094 to 195. [2020-12-23 00:40:07,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-12-23 00:40:07,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 209 transitions. [2020-12-23 00:40:07,052 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 209 transitions. Word has length 173 [2020-12-23 00:40:07,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:40:07,053 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 209 transitions. [2020-12-23 00:40:07,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-23 00:40:07,053 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 209 transitions. [2020-12-23 00:40:07,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-12-23 00:40:07,054 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:40:07,054 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 44, 8, 8, 8, 7, 7, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 00:40:07,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 00:40:07,268 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:40:07,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:40:07,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1396027153, now seen corresponding path program 21 times [2020-12-23 00:40:07,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:40:07,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157099336] [2020-12-23 00:40:07,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:40:07,295 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:40:07,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1756574263] [2020-12-23 00:40:07,296 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 00:40:07,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-23 00:40:07,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:40:07,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:40:07,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:40:08,041 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 00:40:08,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157099336] [2020-12-23 00:40:08,041 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:40:08,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756574263] [2020-12-23 00:40:08,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:40:08,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 00:40:08,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578724221] [2020-12-23 00:40:08,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:40:08,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:40:08,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:40:08,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:40:08,043 INFO L87 Difference]: Start difference. First operand 195 states and 209 transitions. Second operand 9 states. [2020-12-23 00:40:08,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:40:08,225 INFO L93 Difference]: Finished difference Result 371 states and 418 transitions. [2020-12-23 00:40:08,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:40:08,226 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 188 [2020-12-23 00:40:08,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:40:08,227 INFO L225 Difference]: With dead ends: 371 [2020-12-23 00:40:08,227 INFO L226 Difference]: Without dead ends: 323 [2020-12-23 00:40:08,228 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 00:40:08,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2020-12-23 00:40:08,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 198. [2020-12-23 00:40:08,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-12-23 00:40:08,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 213 transitions. [2020-12-23 00:40:08,255 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 213 transitions. Word has length 188 [2020-12-23 00:40:08,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:40:08,255 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 213 transitions. [2020-12-23 00:40:08,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:40:08,255 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 213 transitions. [2020-12-23 00:40:08,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-12-23 00:40:08,256 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:40:08,256 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 44, 8, 8, 8, 7, 7, 5, 1, 1, 1, 1, 1, 1] [2020-12-23 00:40:08,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 00:40:08,457 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:40:08,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:40:08,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1306542921, now seen corresponding path program 22 times [2020-12-23 00:40:08,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:40:08,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428819923] [2020-12-23 00:40:08,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:40:08,484 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:40:08,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [579121732] [2020-12-23 00:40:08,485 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 00:40:08,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:40:08,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:40:08,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-23 00:40:08,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:40:10,837 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 00:40:10,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428819923] [2020-12-23 00:40:10,837 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:40:10,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579121732] [2020-12-23 00:40:10,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:40:10,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-12-23 00:40:10,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646457789] [2020-12-23 00:40:10,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-23 00:40:10,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:40:10,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-23 00:40:10,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1319, Invalid=1437, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 00:40:10,840 INFO L87 Difference]: Start difference. First operand 198 states and 213 transitions. Second operand 53 states. [2020-12-23 00:40:14,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:40:14,604 INFO L93 Difference]: Finished difference Result 2137 states and 2525 transitions. [2020-12-23 00:40:14,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-23 00:40:14,605 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 191 [2020-12-23 00:40:14,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:40:14,613 INFO L225 Difference]: With dead ends: 2137 [2020-12-23 00:40:14,613 INFO L226 Difference]: Without dead ends: 2089 [2020-12-23 00:40:14,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2197, Invalid=2495, Unknown=0, NotChecked=0, Total=4692 [2020-12-23 00:40:14,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2020-12-23 00:40:14,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 201. [2020-12-23 00:40:14,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-12-23 00:40:14,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 217 transitions. [2020-12-23 00:40:14,657 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 217 transitions. Word has length 191 [2020-12-23 00:40:14,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:40:14,658 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 217 transitions. [2020-12-23 00:40:14,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-23 00:40:14,658 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 217 transitions. [2020-12-23 00:40:14,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-12-23 00:40:14,659 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:40:14,659 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 44, 8, 8, 8, 7, 7, 6, 1, 1, 1, 1, 1, 1] [2020-12-23 00:40:14,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 00:40:14,872 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:40:14,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:40:14,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1638489071, now seen corresponding path program 23 times [2020-12-23 00:40:14,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:40:14,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185759595] [2020-12-23 00:40:14,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:40:14,900 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:40:14,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [596328790] [2020-12-23 00:40:14,900 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