/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 08:01:17,514 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 08:01:17,518 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 08:01:17,572 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 08:01:17,573 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 08:01:17,577 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 08:01:17,580 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 08:01:17,598 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 08:01:17,602 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 08:01:17,608 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 08:01:17,611 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 08:01:17,613 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 08:01:17,614 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 08:01:17,617 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 08:01:17,619 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 08:01:17,620 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 08:01:17,621 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 08:01:17,624 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 08:01:17,631 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 08:01:17,636 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 08:01:17,638 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 08:01:17,640 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 08:01:17,642 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 08:01:17,644 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 08:01:17,654 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 08:01:17,673 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 08:01:17,674 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 08:01:17,675 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 08:01:17,676 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 08:01:17,718 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 08:01:17,718 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 08:01:17,722 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 08:01:17,723 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 08:01:17,723 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 08:01:17,723 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 08:01:17,723 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 08:01:17,723 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 08:01:17,724 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 08:01:17,724 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 08:01:17,725 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 08:01:17,725 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 08:01:17,726 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 08:01:17,726 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 08:01:17,726 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 08:01:17,726 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 08:01:17,726 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 08:01:17,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 08:01:17,727 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 08:01:17,727 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 08:01:17,727 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 08:01:17,728 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 08:01:17,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 08:01:17,728 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 08:01:17,728 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 08:01:17,728 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 08:01:18,121 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 08:01:18,173 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 08:01:18,176 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 08:01:18,178 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 08:01:18,178 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 08:01:18,179 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c [2020-12-23 08:01:18,268 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/7379ce559/455d920ff6654eb794dc87f1836894f9/FLAG08ba53535 [2020-12-23 08:01:18,959 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 08:01:18,960 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c [2020-12-23 08:01:18,970 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/7379ce559/455d920ff6654eb794dc87f1836894f9/FLAG08ba53535 [2020-12-23 08:01:19,307 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/7379ce559/455d920ff6654eb794dc87f1836894f9 [2020-12-23 08:01:19,310 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 08:01:19,312 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 08:01:19,314 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 08:01:19,314 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 08:01:19,318 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 08:01:19,318 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 08:01:19" (1/1) ... [2020-12-23 08:01:19,320 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58911438 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:19, skipping insertion in model container [2020-12-23 08:01:19,320 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 08:01:19" (1/1) ... [2020-12-23 08:01:19,329 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 08:01:19,346 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 08:01:19,493 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c[573,586] left hand side expression in assignment: lhs: VariableLHS[~x1~0,] left hand side expression in assignment: lhs: VariableLHS[~x2~0,] left hand side expression in assignment: lhs: VariableLHS[~y1~0,] left hand side expression in assignment: lhs: VariableLHS[~y2~0,] left hand side expression in assignment: lhs: VariableLHS[~y3~0,] left hand side expression in assignment: lhs: VariableLHS[~y1~0,] left hand side expression in assignment: lhs: VariableLHS[~y2~0,] left hand side expression in assignment: lhs: VariableLHS[~y3~0,] left hand side expression in assignment: lhs: VariableLHS[~y2~0,] left hand side expression in assignment: lhs: VariableLHS[~y3~0,] [2020-12-23 08:01:19,514 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 08:01:19,526 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 08:01:19,543 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c[573,586] left hand side expression in assignment: lhs: VariableLHS[~x1~0,] left hand side expression in assignment: lhs: VariableLHS[~x2~0,] left hand side expression in assignment: lhs: VariableLHS[~y1~0,] left hand side expression in assignment: lhs: VariableLHS[~y2~0,] left hand side expression in assignment: lhs: VariableLHS[~y3~0,] left hand side expression in assignment: lhs: VariableLHS[~y1~0,] left hand side expression in assignment: lhs: VariableLHS[~y2~0,] left hand side expression in assignment: lhs: VariableLHS[~y3~0,] left hand side expression in assignment: lhs: VariableLHS[~y2~0,] left hand side expression in assignment: lhs: VariableLHS[~y3~0,] [2020-12-23 08:01:19,549 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 08:01:19,563 INFO L208 MainTranslator]: Completed translation [2020-12-23 08:01:19,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:19 WrapperNode [2020-12-23 08:01:19,564 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 08:01:19,565 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 08:01:19,565 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 08:01:19,566 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 08:01:19,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:19" (1/1) ... [2020-12-23 08:01:19,581 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:19" (1/1) ... [2020-12-23 08:01:19,602 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 08:01:19,603 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 08:01:19,603 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 08:01:19,603 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 08:01:19,612 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:19" (1/1) ... [2020-12-23 08:01:19,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:19" (1/1) ... [2020-12-23 08:01:19,614 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:19" (1/1) ... [2020-12-23 08:01:19,614 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:19" (1/1) ... [2020-12-23 08:01:19,619 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:19" (1/1) ... [2020-12-23 08:01:19,623 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:19" (1/1) ... [2020-12-23 08:01:19,625 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:19" (1/1) ... [2020-12-23 08:01:19,627 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 08:01:19,628 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 08:01:19,628 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 08:01:19,628 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 08:01:19,629 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:19" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 08:01:19,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 08:01:19,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 08:01:19,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 08:01:19,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 08:01:19,990 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 08:01:19,990 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-23 08:01:19,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 08:01:19 BoogieIcfgContainer [2020-12-23 08:01:19,992 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 08:01:19,994 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 08:01:19,994 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 08:01:19,998 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 08:01:19,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 08:01:19" (1/3) ... [2020-12-23 08:01:19,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35357f08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 08:01:19, skipping insertion in model container [2020-12-23 08:01:19,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:19" (2/3) ... [2020-12-23 08:01:20,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35357f08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 08:01:19, skipping insertion in model container [2020-12-23 08:01:20,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 08:01:19" (3/3) ... [2020-12-23 08:01:20,001 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound20.c [2020-12-23 08:01:20,009 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 08:01:20,015 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-23 08:01:20,074 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-23 08:01:20,107 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 08:01:20,108 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 08:01:20,108 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 08:01:20,108 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 08:01:20,108 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 08:01:20,109 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 08:01:20,109 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 08:01:20,109 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 08:01:20,127 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-12-23 08:01:20,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 08:01:20,133 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:20,134 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:20,135 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:20,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:20,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1235340721, now seen corresponding path program 1 times [2020-12-23 08:01:20,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:20,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072423490] [2020-12-23 08:01:20,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:20,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:01:20,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:20,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072423490] [2020-12-23 08:01:20,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:01:20,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 08:01:20,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555476797] [2020-12-23 08:01:20,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 08:01:20,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:20,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 08:01:20,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 08:01:20,445 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-12-23 08:01:20,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:20,467 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2020-12-23 08:01:20,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 08:01:20,468 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-12-23 08:01:20,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:20,493 INFO L225 Difference]: With dead ends: 39 [2020-12-23 08:01:20,493 INFO L226 Difference]: Without dead ends: 17 [2020-12-23 08:01:20,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 08:01:20,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-23 08:01:20,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-23 08:01:20,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 08:01:20,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-12-23 08:01:20,541 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2020-12-23 08:01:20,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:20,541 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-12-23 08:01:20,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 08:01:20,541 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-12-23 08:01:20,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 08:01:20,542 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:20,543 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:20,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 08:01:20,544 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:20,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:20,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1988288018, now seen corresponding path program 1 times [2020-12-23 08:01:20,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:20,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764174779] [2020-12-23 08:01:20,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:20,596 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:20,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [754517934] [2020-12-23 08:01:20,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:20,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:01:20,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 08:01:20,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:20,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:20,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764174779] [2020-12-23 08:01:20,859 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:20,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754517934] [2020-12-23 08:01:20,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:01:20,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-23 08:01:20,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800974936] [2020-12-23 08:01:20,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 08:01:20,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:20,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 08:01:20,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-23 08:01:20,869 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 8 states. [2020-12-23 08:01:21,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:21,221 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2020-12-23 08:01:21,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 08:01:21,222 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2020-12-23 08:01:21,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:21,223 INFO L225 Difference]: With dead ends: 32 [2020-12-23 08:01:21,223 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 08:01:21,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2020-12-23 08:01:21,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 08:01:21,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 20. [2020-12-23 08:01:21,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 08:01:21,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-12-23 08:01:21,231 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 10 [2020-12-23 08:01:21,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:21,232 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-12-23 08:01:21,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 08:01:21,232 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-12-23 08:01:21,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 08:01:21,233 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:21,233 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:21,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 08:01:21,447 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:21,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:21,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1507424085, now seen corresponding path program 1 times [2020-12-23 08:01:21,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:21,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670345485] [2020-12-23 08:01:21,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:21,467 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:21,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [556659793] [2020-12-23 08:01:21,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:21,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:01:21,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 08:01:21,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:21,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:21,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670345485] [2020-12-23 08:01:21,578 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:21,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556659793] [2020-12-23 08:01:21,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:01:21,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 08:01:21,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70902006] [2020-12-23 08:01:21,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 08:01:21,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:21,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 08:01:21,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 08:01:21,585 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 4 states. [2020-12-23 08:01:21,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:21,606 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-12-23 08:01:21,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 08:01:21,606 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-23 08:01:21,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:21,608 INFO L225 Difference]: With dead ends: 24 [2020-12-23 08:01:21,608 INFO L226 Difference]: Without dead ends: 20 [2020-12-23 08:01:21,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 08:01:21,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-23 08:01:21,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-23 08:01:21,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 08:01:21,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-12-23 08:01:21,617 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 11 [2020-12-23 08:01:21,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:21,618 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-12-23 08:01:21,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 08:01:21,618 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-12-23 08:01:21,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 08:01:21,619 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:21,619 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:21,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:21,833 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:21,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:21,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1189458428, now seen corresponding path program 1 times [2020-12-23 08:01:21,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:21,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66806251] [2020-12-23 08:01:21,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:21,850 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:21,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [960593577] [2020-12-23 08:01:21,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:21,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:01:21,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 08:01:21,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:22,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:22,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66806251] [2020-12-23 08:01:22,064 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:22,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960593577] [2020-12-23 08:01:22,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:01:22,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-23 08:01:22,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896859990] [2020-12-23 08:01:22,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 08:01:22,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:22,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 08:01:22,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 08:01:22,067 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 9 states. [2020-12-23 08:01:22,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:22,219 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2020-12-23 08:01:22,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 08:01:22,220 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-12-23 08:01:22,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:22,220 INFO L225 Difference]: With dead ends: 24 [2020-12-23 08:01:22,221 INFO L226 Difference]: Without dead ends: 18 [2020-12-23 08:01:22,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-12-23 08:01:22,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-23 08:01:22,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-12-23 08:01:22,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 08:01:22,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-12-23 08:01:22,226 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2020-12-23 08:01:22,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:22,226 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-12-23 08:01:22,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 08:01:22,227 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-12-23 08:01:22,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 08:01:22,227 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:22,227 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:22,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:22,442 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:22,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:22,443 INFO L82 PathProgramCache]: Analyzing trace with hash -132612007, now seen corresponding path program 1 times [2020-12-23 08:01:22,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:22,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605176656] [2020-12-23 08:01:22,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:22,458 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:22,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1778749347] [2020-12-23 08:01:22,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:22,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:01:22,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 08:01:22,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:22,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:22,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605176656] [2020-12-23 08:01:22,550 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:22,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778749347] [2020-12-23 08:01:22,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:22,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-23 08:01:22,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350803112] [2020-12-23 08:01:22,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 08:01:22,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:22,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 08:01:22,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 08:01:22,553 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2020-12-23 08:01:22,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:22,579 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-12-23 08:01:22,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 08:01:22,579 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-12-23 08:01:22,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:22,580 INFO L225 Difference]: With dead ends: 26 [2020-12-23 08:01:22,580 INFO L226 Difference]: Without dead ends: 22 [2020-12-23 08:01:22,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 08:01:22,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-23 08:01:22,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-23 08:01:22,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 08:01:22,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-12-23 08:01:22,586 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 16 [2020-12-23 08:01:22,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:22,587 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-12-23 08:01:22,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 08:01:22,587 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-12-23 08:01:22,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 08:01:22,588 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:22,588 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:22,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:22,802 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:22,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:22,803 INFO L82 PathProgramCache]: Analyzing trace with hash -625728149, now seen corresponding path program 2 times [2020-12-23 08:01:22,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:22,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997766599] [2020-12-23 08:01:22,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:22,818 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:22,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [203531577] [2020-12-23 08:01:22,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:22,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 08:01:22,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:01:22,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 08:01:22,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:22,941 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:22,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997766599] [2020-12-23 08:01:22,942 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:22,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203531577] [2020-12-23 08:01:22,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:22,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 08:01:22,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348864286] [2020-12-23 08:01:22,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 08:01:22,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:22,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 08:01:22,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 08:01:22,945 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 6 states. [2020-12-23 08:01:22,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:22,982 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2020-12-23 08:01:22,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 08:01:22,982 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-12-23 08:01:22,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:22,983 INFO L225 Difference]: With dead ends: 31 [2020-12-23 08:01:22,983 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 08:01:22,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-23 08:01:22,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 08:01:22,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-23 08:01:22,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 08:01:22,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-12-23 08:01:22,990 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 21 [2020-12-23 08:01:22,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:22,991 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-12-23 08:01:22,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 08:01:22,991 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-12-23 08:01:22,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 08:01:22,991 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:22,992 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:23,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 08:01:23,207 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:23,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:23,208 INFO L82 PathProgramCache]: Analyzing trace with hash 256826265, now seen corresponding path program 3 times [2020-12-23 08:01:23,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:23,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243175443] [2020-12-23 08:01:23,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:23,221 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:23,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [516635188] [2020-12-23 08:01:23,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:23,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 08:01:23,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:01:23,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 08:01:23,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:23,352 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:23,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243175443] [2020-12-23 08:01:23,353 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:23,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516635188] [2020-12-23 08:01:23,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:23,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 08:01:23,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925571197] [2020-12-23 08:01:23,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 08:01:23,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:23,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 08:01:23,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 08:01:23,355 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 7 states. [2020-12-23 08:01:23,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:23,402 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-12-23 08:01:23,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 08:01:23,403 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-12-23 08:01:23,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:23,404 INFO L225 Difference]: With dead ends: 36 [2020-12-23 08:01:23,404 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 08:01:23,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-23 08:01:23,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 08:01:23,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-23 08:01:23,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 08:01:23,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-12-23 08:01:23,411 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 26 [2020-12-23 08:01:23,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:23,411 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-12-23 08:01:23,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 08:01:23,412 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-12-23 08:01:23,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 08:01:23,412 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:23,413 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:23,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:23,629 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:23,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:23,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1955278293, now seen corresponding path program 4 times [2020-12-23 08:01:23,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:23,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850443893] [2020-12-23 08:01:23,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:23,645 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:23,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [327147831] [2020-12-23 08:01:23,646 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:23,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 08:01:23,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:01:23,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 08:01:23,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:23,788 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:23,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850443893] [2020-12-23 08:01:23,788 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:23,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327147831] [2020-12-23 08:01:23,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:23,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 08:01:23,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649398914] [2020-12-23 08:01:23,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 08:01:23,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:23,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 08:01:23,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-23 08:01:23,790 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 8 states. [2020-12-23 08:01:23,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:23,865 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2020-12-23 08:01:23,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 08:01:23,865 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-12-23 08:01:23,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:23,866 INFO L225 Difference]: With dead ends: 41 [2020-12-23 08:01:23,866 INFO L226 Difference]: Without dead ends: 37 [2020-12-23 08:01:23,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-12-23 08:01:23,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-23 08:01:23,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-23 08:01:23,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 08:01:23,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-12-23 08:01:23,874 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 31 [2020-12-23 08:01:23,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:23,874 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-12-23 08:01:23,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 08:01:23,875 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-12-23 08:01:23,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 08:01:23,875 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:23,876 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:24,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:24,090 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:24,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:24,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1615059239, now seen corresponding path program 5 times [2020-12-23 08:01:24,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:24,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223747876] [2020-12-23 08:01:24,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:24,104 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:24,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1909936002] [2020-12-23 08:01:24,104 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:24,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 08:01:24,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:01:24,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 08:01:24,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:24,292 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:24,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223747876] [2020-12-23 08:01:24,292 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:24,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909936002] [2020-12-23 08:01:24,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:24,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 08:01:24,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907455377] [2020-12-23 08:01:24,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 08:01:24,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:24,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 08:01:24,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-12-23 08:01:24,302 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 9 states. [2020-12-23 08:01:24,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:24,405 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2020-12-23 08:01:24,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 08:01:24,405 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-12-23 08:01:24,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:24,406 INFO L225 Difference]: With dead ends: 46 [2020-12-23 08:01:24,406 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 08:01:24,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-12-23 08:01:24,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 08:01:24,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-12-23 08:01:24,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 08:01:24,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-12-23 08:01:24,415 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 36 [2020-12-23 08:01:24,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:24,415 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-12-23 08:01:24,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 08:01:24,415 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-12-23 08:01:24,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 08:01:24,416 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:24,417 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:24,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 08:01:24,631 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:24,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:24,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1613459733, now seen corresponding path program 6 times [2020-12-23 08:01:24,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:24,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078954748] [2020-12-23 08:01:24,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:24,645 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:24,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2040053409] [2020-12-23 08:01:24,646 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:24,728 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 08:01:24,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:01:24,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 08:01:24,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:24,852 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:24,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078954748] [2020-12-23 08:01:24,852 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:24,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040053409] [2020-12-23 08:01:24,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:24,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 08:01:24,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716888513] [2020-12-23 08:01:24,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 08:01:24,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:24,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 08:01:24,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-12-23 08:01:24,855 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 10 states. [2020-12-23 08:01:24,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:24,951 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2020-12-23 08:01:24,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 08:01:24,951 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-12-23 08:01:24,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:24,952 INFO L225 Difference]: With dead ends: 51 [2020-12-23 08:01:24,953 INFO L226 Difference]: Without dead ends: 47 [2020-12-23 08:01:24,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2020-12-23 08:01:24,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-23 08:01:24,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-12-23 08:01:24,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 08:01:24,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2020-12-23 08:01:24,962 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 41 [2020-12-23 08:01:24,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:24,963 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2020-12-23 08:01:24,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 08:01:24,963 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2020-12-23 08:01:24,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 08:01:24,964 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:24,964 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:25,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:25,179 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:25,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:25,180 INFO L82 PathProgramCache]: Analyzing trace with hash -2055970279, now seen corresponding path program 7 times [2020-12-23 08:01:25,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:25,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713144522] [2020-12-23 08:01:25,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:25,195 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:25,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1158192604] [2020-12-23 08:01:25,195 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:25,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:01:25,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 08:01:25,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:25,433 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:25,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713144522] [2020-12-23 08:01:25,433 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:25,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158192604] [2020-12-23 08:01:25,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:25,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 08:01:25,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896457221] [2020-12-23 08:01:25,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 08:01:25,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:25,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 08:01:25,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-12-23 08:01:25,436 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 11 states. [2020-12-23 08:01:25,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:25,542 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-12-23 08:01:25,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 08:01:25,542 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2020-12-23 08:01:25,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:25,543 INFO L225 Difference]: With dead ends: 56 [2020-12-23 08:01:25,543 INFO L226 Difference]: Without dead ends: 52 [2020-12-23 08:01:25,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2020-12-23 08:01:25,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-23 08:01:25,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-12-23 08:01:25,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 08:01:25,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2020-12-23 08:01:25,553 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 46 [2020-12-23 08:01:25,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:25,554 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2020-12-23 08:01:25,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 08:01:25,554 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2020-12-23 08:01:25,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 08:01:25,556 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:25,556 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:25,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:25,771 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:25,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:25,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1472242773, now seen corresponding path program 8 times [2020-12-23 08:01:25,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:25,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331109951] [2020-12-23 08:01:25,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:25,785 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:25,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1462599918] [2020-12-23 08:01:25,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:25,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 08:01:25,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:01:25,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 08:01:25,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:26,046 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:26,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331109951] [2020-12-23 08:01:26,050 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:26,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462599918] [2020-12-23 08:01:26,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:26,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-23 08:01:26,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123764901] [2020-12-23 08:01:26,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 08:01:26,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:26,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 08:01:26,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-12-23 08:01:26,054 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand 12 states. [2020-12-23 08:01:26,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:26,193 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2020-12-23 08:01:26,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 08:01:26,193 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-12-23 08:01:26,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:26,195 INFO L225 Difference]: With dead ends: 61 [2020-12-23 08:01:26,195 INFO L226 Difference]: Without dead ends: 57 [2020-12-23 08:01:26,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2020-12-23 08:01:26,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-23 08:01:26,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-12-23 08:01:26,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 08:01:26,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2020-12-23 08:01:26,205 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 51 [2020-12-23 08:01:26,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:26,205 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2020-12-23 08:01:26,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 08:01:26,206 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2020-12-23 08:01:26,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-23 08:01:26,207 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:26,207 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:26,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 08:01:26,422 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:26,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:26,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1819570855, now seen corresponding path program 9 times [2020-12-23 08:01:26,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:26,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707185060] [2020-12-23 08:01:26,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:26,435 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:26,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1193946106] [2020-12-23 08:01:26,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:26,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 08:01:26,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:01:26,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 08:01:26,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:26,759 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:26,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707185060] [2020-12-23 08:01:26,760 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:26,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193946106] [2020-12-23 08:01:26,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:26,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-23 08:01:26,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51414521] [2020-12-23 08:01:26,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 08:01:26,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:26,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 08:01:26,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-12-23 08:01:26,765 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand 13 states. [2020-12-23 08:01:26,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:26,903 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2020-12-23 08:01:26,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 08:01:26,903 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2020-12-23 08:01:26,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:26,905 INFO L225 Difference]: With dead ends: 66 [2020-12-23 08:01:26,905 INFO L226 Difference]: Without dead ends: 62 [2020-12-23 08:01:26,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2020-12-23 08:01:26,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-23 08:01:26,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-12-23 08:01:26,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-23 08:01:26,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2020-12-23 08:01:26,919 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 56 [2020-12-23 08:01:26,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:26,919 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2020-12-23 08:01:26,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 08:01:26,919 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2020-12-23 08:01:26,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-23 08:01:26,921 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:26,922 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:27,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 08:01:27,135 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:27,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:27,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1641990037, now seen corresponding path program 10 times [2020-12-23 08:01:27,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:27,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276978668] [2020-12-23 08:01:27,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:27,147 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:27,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1626585243] [2020-12-23 08:01:27,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:27,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 08:01:27,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:01:27,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 08:01:27,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:27,423 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:27,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276978668] [2020-12-23 08:01:27,424 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:27,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626585243] [2020-12-23 08:01:27,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:27,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-23 08:01:27,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166715459] [2020-12-23 08:01:27,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 08:01:27,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:27,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 08:01:27,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-12-23 08:01:27,426 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand 14 states. [2020-12-23 08:01:27,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:27,588 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2020-12-23 08:01:27,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 08:01:27,588 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2020-12-23 08:01:27,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:27,589 INFO L225 Difference]: With dead ends: 71 [2020-12-23 08:01:27,589 INFO L226 Difference]: Without dead ends: 67 [2020-12-23 08:01:27,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2020-12-23 08:01:27,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-23 08:01:27,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-12-23 08:01:27,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-23 08:01:27,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2020-12-23 08:01:27,625 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 61 [2020-12-23 08:01:27,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:27,627 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2020-12-23 08:01:27,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 08:01:27,627 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2020-12-23 08:01:27,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-23 08:01:27,628 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:27,628 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:27,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 08:01:27,844 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:27,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:27,845 INFO L82 PathProgramCache]: Analyzing trace with hash -736778087, now seen corresponding path program 11 times [2020-12-23 08:01:27,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:27,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931912382] [2020-12-23 08:01:27,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:27,856 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:27,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [741084615] [2020-12-23 08:01:27,857 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:27,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-23 08:01:27,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:01:27,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 08:01:27,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:28,183 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:28,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931912382] [2020-12-23 08:01:28,185 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:28,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741084615] [2020-12-23 08:01:28,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:28,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-12-23 08:01:28,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224838085] [2020-12-23 08:01:28,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 08:01:28,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:28,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 08:01:28,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-12-23 08:01:28,187 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand 15 states. [2020-12-23 08:01:28,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:28,384 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2020-12-23 08:01:28,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 08:01:28,384 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 66 [2020-12-23 08:01:28,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:28,385 INFO L225 Difference]: With dead ends: 76 [2020-12-23 08:01:28,385 INFO L226 Difference]: Without dead ends: 72 [2020-12-23 08:01:28,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=247, Invalid=403, Unknown=0, NotChecked=0, Total=650 [2020-12-23 08:01:28,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-23 08:01:28,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-12-23 08:01:28,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-23 08:01:28,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2020-12-23 08:01:28,394 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 66 [2020-12-23 08:01:28,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:28,394 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2020-12-23 08:01:28,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 08:01:28,395 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2020-12-23 08:01:28,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-23 08:01:28,395 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:28,396 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:28,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:28,608 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:28,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:28,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1545198293, now seen corresponding path program 12 times [2020-12-23 08:01:28,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:28,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244225656] [2020-12-23 08:01:28,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:28,619 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:28,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [158286343] [2020-12-23 08:01:28,620 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:28,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 08:01:28,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:01:28,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 08:01:28,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:28,965 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:28,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244225656] [2020-12-23 08:01:28,966 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:28,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158286343] [2020-12-23 08:01:28,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:28,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-12-23 08:01:28,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199470226] [2020-12-23 08:01:28,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 08:01:28,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:28,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 08:01:28,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-12-23 08:01:28,968 INFO L87 Difference]: Start difference. First operand 72 states and 84 transitions. Second operand 16 states. [2020-12-23 08:01:29,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:29,162 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2020-12-23 08:01:29,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 08:01:29,186 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 71 [2020-12-23 08:01:29,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:29,187 INFO L225 Difference]: With dead ends: 81 [2020-12-23 08:01:29,187 INFO L226 Difference]: Without dead ends: 77 [2020-12-23 08:01:29,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=287, Invalid=469, Unknown=0, NotChecked=0, Total=756 [2020-12-23 08:01:29,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-23 08:01:29,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-12-23 08:01:29,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-23 08:01:29,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 90 transitions. [2020-12-23 08:01:29,198 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 90 transitions. Word has length 71 [2020-12-23 08:01:29,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:29,198 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 90 transitions. [2020-12-23 08:01:29,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 08:01:29,199 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 90 transitions. [2020-12-23 08:01:29,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-23 08:01:29,202 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:29,202 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:29,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 08:01:29,418 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:29,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:29,419 INFO L82 PathProgramCache]: Analyzing trace with hash -936987687, now seen corresponding path program 13 times [2020-12-23 08:01:29,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:29,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475280944] [2020-12-23 08:01:29,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:29,430 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:29,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [789394601] [2020-12-23 08:01:29,430 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:29,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:01:29,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 08:01:29,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:29,757 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:29,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475280944] [2020-12-23 08:01:29,758 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:29,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789394601] [2020-12-23 08:01:29,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:29,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-12-23 08:01:29,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396823057] [2020-12-23 08:01:29,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 08:01:29,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:29,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 08:01:29,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-12-23 08:01:29,760 INFO L87 Difference]: Start difference. First operand 77 states and 90 transitions. Second operand 17 states. [2020-12-23 08:01:29,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:29,989 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2020-12-23 08:01:29,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 08:01:29,989 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2020-12-23 08:01:29,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:29,990 INFO L225 Difference]: With dead ends: 86 [2020-12-23 08:01:29,990 INFO L226 Difference]: Without dead ends: 82 [2020-12-23 08:01:29,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=330, Invalid=540, Unknown=0, NotChecked=0, Total=870 [2020-12-23 08:01:29,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-23 08:01:30,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-12-23 08:01:30,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-23 08:01:30,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 96 transitions. [2020-12-23 08:01:30,001 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 96 transitions. Word has length 76 [2020-12-23 08:01:30,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:30,002 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 96 transitions. [2020-12-23 08:01:30,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 08:01:30,002 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 96 transitions. [2020-12-23 08:01:30,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-23 08:01:30,002 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:30,003 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:30,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 08:01:30,218 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:30,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:30,219 INFO L82 PathProgramCache]: Analyzing trace with hash -990240277, now seen corresponding path program 14 times [2020-12-23 08:01:30,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:30,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86501709] [2020-12-23 08:01:30,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:30,234 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:30,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1465370972] [2020-12-23 08:01:30,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:30,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 08:01:30,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:01:30,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 08:01:30,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:30,594 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:30,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86501709] [2020-12-23 08:01:30,594 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:30,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465370972] [2020-12-23 08:01:30,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:30,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-12-23 08:01:30,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022622167] [2020-12-23 08:01:30,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 08:01:30,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:30,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 08:01:30,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-12-23 08:01:30,597 INFO L87 Difference]: Start difference. First operand 82 states and 96 transitions. Second operand 18 states. [2020-12-23 08:01:30,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:30,884 INFO L93 Difference]: Finished difference Result 91 states and 106 transitions. [2020-12-23 08:01:30,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 08:01:30,884 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 81 [2020-12-23 08:01:30,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:30,885 INFO L225 Difference]: With dead ends: 91 [2020-12-23 08:01:30,885 INFO L226 Difference]: Without dead ends: 87 [2020-12-23 08:01:30,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=376, Invalid=616, Unknown=0, NotChecked=0, Total=992 [2020-12-23 08:01:30,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-23 08:01:30,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-12-23 08:01:30,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-23 08:01:30,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 102 transitions. [2020-12-23 08:01:30,894 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 102 transitions. Word has length 81 [2020-12-23 08:01:30,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:30,894 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 102 transitions. [2020-12-23 08:01:30,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 08:01:30,894 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 102 transitions. [2020-12-23 08:01:30,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-23 08:01:30,895 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:30,895 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:31,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 08:01:31,109 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:31,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:31,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1479364839, now seen corresponding path program 15 times [2020-12-23 08:01:31,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:31,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425692013] [2020-12-23 08:01:31,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:31,121 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:31,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [170011] [2020-12-23 08:01:31,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:31,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-23 08:01:31,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:01:31,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 08:01:31,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:31,540 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:31,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425692013] [2020-12-23 08:01:31,541 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:31,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170011] [2020-12-23 08:01:31,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:31,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-12-23 08:01:31,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736629292] [2020-12-23 08:01:31,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 08:01:31,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:31,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 08:01:31,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-12-23 08:01:31,546 INFO L87 Difference]: Start difference. First operand 87 states and 102 transitions. Second operand 19 states. [2020-12-23 08:01:31,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:31,849 INFO L93 Difference]: Finished difference Result 96 states and 112 transitions. [2020-12-23 08:01:31,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 08:01:31,850 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 86 [2020-12-23 08:01:31,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:31,851 INFO L225 Difference]: With dead ends: 96 [2020-12-23 08:01:31,851 INFO L226 Difference]: Without dead ends: 92 [2020-12-23 08:01:31,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=425, Invalid=697, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 08:01:31,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-23 08:01:31,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-12-23 08:01:31,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-23 08:01:31,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 108 transitions. [2020-12-23 08:01:31,859 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 108 transitions. Word has length 86 [2020-12-23 08:01:31,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:31,860 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 108 transitions. [2020-12-23 08:01:31,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 08:01:31,860 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 108 transitions. [2020-12-23 08:01:31,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-23 08:01:31,861 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:31,861 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:32,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:32,074 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:32,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:32,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1245106517, now seen corresponding path program 16 times [2020-12-23 08:01:32,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:32,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995807080] [2020-12-23 08:01:32,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:32,096 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:32,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1443949021] [2020-12-23 08:01:32,096 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:32,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 08:01:32,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:01:32,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 08:01:32,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:32,485 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:32,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995807080] [2020-12-23 08:01:32,486 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:32,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443949021] [2020-12-23 08:01:32,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:32,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-12-23 08:01:32,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447797370] [2020-12-23 08:01:32,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 08:01:32,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:32,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 08:01:32,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-12-23 08:01:32,488 INFO L87 Difference]: Start difference. First operand 92 states and 108 transitions. Second operand 20 states. [2020-12-23 08:01:32,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:32,808 INFO L93 Difference]: Finished difference Result 101 states and 118 transitions. [2020-12-23 08:01:32,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 08:01:32,808 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 91 [2020-12-23 08:01:32,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:32,809 INFO L225 Difference]: With dead ends: 101 [2020-12-23 08:01:32,809 INFO L226 Difference]: Without dead ends: 97 [2020-12-23 08:01:32,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=477, Invalid=783, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 08:01:32,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-23 08:01:32,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-12-23 08:01:32,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-23 08:01:32,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 114 transitions. [2020-12-23 08:01:32,822 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 114 transitions. Word has length 91 [2020-12-23 08:01:32,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:32,822 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 114 transitions. [2020-12-23 08:01:32,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 08:01:32,822 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 114 transitions. [2020-12-23 08:01:32,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-23 08:01:32,825 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:32,825 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:33,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:33,040 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:33,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:33,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1574069671, now seen corresponding path program 17 times [2020-12-23 08:01:33,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:33,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026414803] [2020-12-23 08:01:33,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:33,051 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:33,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [687642576] [2020-12-23 08:01:33,051 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:33,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-23 08:01:33,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:01:33,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 08:01:33,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:33,495 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:33,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026414803] [2020-12-23 08:01:33,495 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:33,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687642576] [2020-12-23 08:01:33,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:33,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-12-23 08:01:33,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706287570] [2020-12-23 08:01:33,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 08:01:33,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:33,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 08:01:33,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-12-23 08:01:33,497 INFO L87 Difference]: Start difference. First operand 97 states and 114 transitions. Second operand 21 states. [2020-12-23 08:01:33,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:33,838 INFO L93 Difference]: Finished difference Result 106 states and 124 transitions. [2020-12-23 08:01:33,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 08:01:33,838 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 96 [2020-12-23 08:01:33,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:33,839 INFO L225 Difference]: With dead ends: 106 [2020-12-23 08:01:33,839 INFO L226 Difference]: Without dead ends: 102 [2020-12-23 08:01:33,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=532, Invalid=874, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 08:01:33,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-23 08:01:33,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-12-23 08:01:33,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-23 08:01:33,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 120 transitions. [2020-12-23 08:01:33,848 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 120 transitions. Word has length 96 [2020-12-23 08:01:33,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:33,848 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 120 transitions. [2020-12-23 08:01:33,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 08:01:33,849 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 120 transitions. [2020-12-23 08:01:33,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-23 08:01:33,850 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:33,850 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:34,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 08:01:34,065 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:34,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:34,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1816179861, now seen corresponding path program 18 times [2020-12-23 08:01:34,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:34,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404938122] [2020-12-23 08:01:34,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:34,078 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:34,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1521652205] [2020-12-23 08:01:34,078 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:34,227 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-23 08:01:34,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:01:34,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 08:01:34,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:34,617 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:34,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404938122] [2020-12-23 08:01:34,617 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:34,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521652205] [2020-12-23 08:01:34,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:34,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-12-23 08:01:34,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942058069] [2020-12-23 08:01:34,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 08:01:34,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:34,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 08:01:34,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-12-23 08:01:34,620 INFO L87 Difference]: Start difference. First operand 102 states and 120 transitions. Second operand 22 states. [2020-12-23 08:01:35,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:35,013 INFO L93 Difference]: Finished difference Result 111 states and 130 transitions. [2020-12-23 08:01:35,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 08:01:35,016 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 101 [2020-12-23 08:01:35,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:35,017 INFO L225 Difference]: With dead ends: 111 [2020-12-23 08:01:35,017 INFO L226 Difference]: Without dead ends: 107 [2020-12-23 08:01:35,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=590, Invalid=970, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 08:01:35,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-23 08:01:35,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-12-23 08:01:35,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-23 08:01:35,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 126 transitions. [2020-12-23 08:01:35,026 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 126 transitions. Word has length 101 [2020-12-23 08:01:35,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:35,027 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 126 transitions. [2020-12-23 08:01:35,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 08:01:35,027 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 126 transitions. [2020-12-23 08:01:35,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-23 08:01:35,028 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:35,028 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:35,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 08:01:35,243 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:35,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:35,244 INFO L82 PathProgramCache]: Analyzing trace with hash 491484569, now seen corresponding path program 19 times [2020-12-23 08:01:35,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:35,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848769277] [2020-12-23 08:01:35,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:35,255 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:35,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2051548231] [2020-12-23 08:01:35,256 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:35,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:01:35,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 08:01:35,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:35,769 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:01:35,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848769277] [2020-12-23 08:01:35,770 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:35,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051548231] [2020-12-23 08:01:35,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:01:35,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-12-23 08:01:35,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861312046] [2020-12-23 08:01:35,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 08:01:35,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:35,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 08:01:35,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-12-23 08:01:35,771 INFO L87 Difference]: Start difference. First operand 107 states and 126 transitions. Second operand 23 states. [2020-12-23 08:01:36,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:36,189 INFO L93 Difference]: Finished difference Result 116 states and 136 transitions. [2020-12-23 08:01:36,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 08:01:36,190 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 106 [2020-12-23 08:01:36,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:36,191 INFO L225 Difference]: With dead ends: 116 [2020-12-23 08:01:36,191 INFO L226 Difference]: Without dead ends: 112 [2020-12-23 08:01:36,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=651, Invalid=1071, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 08:01:36,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-23 08:01:36,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2020-12-23 08:01:36,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-23 08:01:36,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 132 transitions. [2020-12-23 08:01:36,198 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 132 transitions. Word has length 106 [2020-12-23 08:01:36,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:36,198 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 132 transitions. [2020-12-23 08:01:36,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 08:01:36,198 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 132 transitions. [2020-12-23 08:01:36,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-23 08:01:36,199 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:36,199 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:36,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:36,400 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:36,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:36,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1521977301, now seen corresponding path program 20 times [2020-12-23 08:01:36,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:36,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121232342] [2020-12-23 08:01:36,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:36,410 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:36,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [179571167] [2020-12-23 08:01:36,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:01:36,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 08:01:36,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-12-23 08:01:36,527 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 08:01:36,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 08:01:36,577 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 08:01:36,884 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-23 08:01:36,884 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 08:01:37,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 08:01:37,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 08:01:37 BoogieIcfgContainer [2020-12-23 08:01:37,208 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 08:01:37,208 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 08:01:37,209 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 08:01:37,209 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 08:01:37,209 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 08:01:19" (3/4) ... [2020-12-23 08:01:37,212 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-23 08:01:37,318 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/nla-digbench-scaling/mannadiv_unwindbound20.c-witness.graphml [2020-12-23 08:01:37,319 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 08:01:37,321 INFO L168 Benchmark]: Toolchain (without parser) took 18007.91 ms. Allocated memory was 172.0 MB in the beginning and 276.8 MB in the end (delta: 104.9 MB). Free memory was 146.3 MB in the beginning and 171.5 MB in the end (delta: -25.3 MB). Peak memory consumption was 80.0 MB. Max. memory is 8.0 GB. [2020-12-23 08:01:37,321 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 172.0 MB. Free memory is still 143.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 08:01:37,321 INFO L168 Benchmark]: CACSL2BoogieTranslator took 250.94 ms. Allocated memory is still 172.0 MB. Free memory was 146.1 MB in the beginning and 136.3 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-23 08:01:37,322 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.60 ms. Allocated memory is still 172.0 MB. Free memory was 136.3 MB in the beginning and 134.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 08:01:37,322 INFO L168 Benchmark]: Boogie Preprocessor took 24.54 ms. Allocated memory is still 172.0 MB. Free memory was 134.8 MB in the beginning and 133.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 08:01:37,323 INFO L168 Benchmark]: RCFGBuilder took 364.20 ms. Allocated memory is still 172.0 MB. Free memory was 133.7 MB in the beginning and 120.2 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-12-23 08:01:37,323 INFO L168 Benchmark]: TraceAbstraction took 17214.10 ms. Allocated memory was 172.0 MB in the beginning and 276.8 MB in the end (delta: 104.9 MB). Free memory was 119.8 MB in the beginning and 180.4 MB in the end (delta: -60.7 MB). Peak memory consumption was 45.4 MB. Max. memory is 8.0 GB. [2020-12-23 08:01:37,323 INFO L168 Benchmark]: Witness Printer took 110.27 ms. Allocated memory is still 276.8 MB. Free memory was 180.4 MB in the beginning and 171.5 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-12-23 08:01:37,326 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 172.0 MB. Free memory is still 143.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 250.94 ms. Allocated memory is still 172.0 MB. Free memory was 146.1 MB in the beginning and 136.3 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 36.60 ms. Allocated memory is still 172.0 MB. Free memory was 136.3 MB in the beginning and 134.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 24.54 ms. Allocated memory is still 172.0 MB. Free memory was 134.8 MB in the beginning and 133.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 364.20 ms. Allocated memory is still 172.0 MB. Free memory was 133.7 MB in the beginning and 120.2 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 17214.10 ms. Allocated memory was 172.0 MB in the beginning and 276.8 MB in the end (delta: 104.9 MB). Free memory was 119.8 MB in the beginning and 180.4 MB in the end (delta: -60.7 MB). Peak memory consumption was 45.4 MB. Max. memory is 8.0 GB. * Witness Printer took 110.27 ms. Allocated memory is still 276.8 MB. Free memory was 180.4 MB in the beginning and 171.5 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [counter=0] [L24] int x1, x2; [L25] int y1, y2, y3; [L26] x1 = __VERIFIER_nondet_int() [L27] x2 = __VERIFIER_nondet_int() [L13] COND FALSE !(!cond) VAL [counter=0] [L13] COND FALSE !(!cond) VAL [counter=0] [L32] y1 = 0 [L33] y2 = 0 [L34] y3 = x1 VAL [counter=0] [L36] EXPR counter++ VAL [counter=1] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=1] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=1] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=1] [L36] EXPR counter++ VAL [counter=2] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=2] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=2] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=2] [L36] EXPR counter++ VAL [counter=3] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=3] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=3] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=3] [L36] EXPR counter++ VAL [counter=4] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=4] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=4] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=4] [L36] EXPR counter++ VAL [counter=5] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=5] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=5] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=5] [L36] EXPR counter++ VAL [counter=6] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=6] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=6] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=6] [L36] EXPR counter++ VAL [counter=7] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=7] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=7] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=7] [L36] EXPR counter++ VAL [counter=8] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=8] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=8] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=8] [L36] EXPR counter++ VAL [counter=9] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=9] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=9] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=9] [L36] EXPR counter++ VAL [counter=10] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=10] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=10] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=10] [L36] EXPR counter++ VAL [counter=11] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=11] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=11] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=11] [L36] EXPR counter++ VAL [counter=12] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=12] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=12] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=12] [L36] EXPR counter++ VAL [counter=13] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=13] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=13] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=13] [L36] EXPR counter++ VAL [counter=14] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=14] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=14] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=14] [L36] EXPR counter++ VAL [counter=15] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=15] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=15] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=15] [L36] EXPR counter++ VAL [counter=16] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=16] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=16] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=16] [L36] EXPR counter++ VAL [counter=17] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=17] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=17] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=17] [L36] EXPR counter++ VAL [counter=18] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=18] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=18] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=18] [L36] EXPR counter++ VAL [counter=19] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=19] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=19] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=19] [L36] EXPR counter++ VAL [counter=20] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=20] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=20] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=20] [L36] EXPR counter++ VAL [counter=21] [L36] COND FALSE !(counter++<20) [L16] COND TRUE !(cond) VAL [counter=21] [L18] reach_error() VAL [counter=21] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 16.9s, OverallIterations: 24, TraceHistogramMax: 21, AutomataDifference: 4.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 326 SDtfs, 537 SDslu, 1582 SDs, 0 SdLazy, 620 SolverSat, 60 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1371 GetRequests, 930 SyntacticMatches, 0 SemanticMatches, 441 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1346 ImplicationChecksByTransitivity, 5.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=112occurred in iteration=23, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 23 MinimizatonAttempts, 11 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 4.3s InterpolantComputationTime, 1314 NumberOfCodeBlocks, 1314 NumberOfCodeBlocksAsserted, 127 NumberOfCheckSat, 1180 ConstructedInterpolants, 0 QuantifiedInterpolants, 243420 SizeOfPredicates, 210 NumberOfNonLiveVariables, 5135 ConjunctsInSsa, 481 ConjunctsInUnsatCore, 23 InterpolantComputations, 4 PerfectInterpolantSequences, 0/6080 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...