/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/reducercommutativity/rangesum60.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:57:02,096 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:57:02,099 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:57:02,138 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 21:57:02,138 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 21:57:02,140 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 21:57:02,142 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 21:57:02,144 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 21:57:02,147 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 21:57:02,148 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 21:57:02,150 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 21:57:02,151 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 21:57:02,152 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 21:57:02,153 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 21:57:02,155 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 21:57:02,157 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 21:57:02,171 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 21:57:02,173 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 21:57:02,175 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 21:57:02,178 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 21:57:02,180 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 21:57:02,182 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 21:57:02,183 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 21:57:02,184 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 21:57:02,188 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 21:57:02,192 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-21 21:57:02,193 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-21 21:57:02,195 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-21 21:57:02,196 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-21 21:57:02,197 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-21 21:57:02,197 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-21 21:57:02,198 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-21 21:57:02,199 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-21 21:57:02,199 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 21:57:02,200 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 21:57:02,201 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 21:57:02,203 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:57:02,231 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:57:02,231 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:57:02,233 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:57:02,233 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:57:02,233 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:57:02,234 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:57:02,234 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:57:02,234 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:57:02,234 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:57:02,234 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:57:02,235 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:57:02,235 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:57:02,235 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:57:02,235 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:57:02,235 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:57:02,236 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:57:02,236 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:57:02,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:57:02,236 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:57:02,236 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:57:02,237 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:57:02,237 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:57:02,237 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:57:02,237 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:57:02,237 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:57:02,238 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:57:02,592 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:57:02,631 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:57:02,636 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:57:02,637 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:57:02,638 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:57:02,639 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/rangesum60.i [2020-12-21 21:57:02,728 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2957eb8c/6a46a199725d44c99a38f1e3f9e0faa9/FLAGd21696ed6 [2020-12-21 21:57:03,390 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:57:03,391 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum60.i [2020-12-21 21:57:03,398 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2957eb8c/6a46a199725d44c99a38f1e3f9e0faa9/FLAGd21696ed6 [2020-12-21 21:57:03,745 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2957eb8c/6a46a199725d44c99a38f1e3f9e0faa9 [2020-12-21 21:57:03,748 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:57:03,750 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:57:03,755 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:57:03,755 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:57:03,759 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:57:03,761 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:57:03" (1/1) ... [2020-12-21 21:57:03,763 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c76af24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:03, skipping insertion in model container [2020-12-21 21:57:03,763 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:57:03" (1/1) ... [2020-12-21 21:57:03,772 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:57:03,793 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:57:03,956 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum60.i[1465,1478] [2020-12-21 21:57:03,960 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:57:03,968 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:57:03,992 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum60.i[1465,1478] [2020-12-21 21:57:03,993 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:57:04,011 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:57:04,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:04 WrapperNode [2020-12-21 21:57:04,012 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:57:04,013 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:57:04,013 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:57:04,013 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:57:04,023 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:04" (1/1) ... [2020-12-21 21:57:04,032 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:04" (1/1) ... [2020-12-21 21:57:04,064 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:57:04,065 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:57:04,065 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:57:04,065 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:57:04,074 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:04" (1/1) ... [2020-12-21 21:57:04,075 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:04" (1/1) ... [2020-12-21 21:57:04,079 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:04" (1/1) ... [2020-12-21 21:57:04,079 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:04" (1/1) ... [2020-12-21 21:57:04,091 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:04" (1/1) ... [2020-12-21 21:57:04,097 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:04" (1/1) ... [2020-12-21 21:57:04,103 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:04" (1/1) ... [2020-12-21 21:57:04,110 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:57:04,111 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:57:04,115 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:57:04,115 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:57:04,116 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:04,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:57:04,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:57:04,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:57:04,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:57:04,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:57:04,217 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:57:04,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 21:57:04,635 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:57:04,638 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2020-12-21 21:57:04,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:57:04 BoogieIcfgContainer [2020-12-21 21:57:04,641 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:57:04,646 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:57:04,647 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:57:04,654 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:57:04,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:57:03" (1/3) ... [2020-12-21 21:57:04,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@209996dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:57:04, skipping insertion in model container [2020-12-21 21:57:04,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:57:04" (2/3) ... [2020-12-21 21:57:04,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@209996dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:57:04, skipping insertion in model container [2020-12-21 21:57:04,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:57:04" (3/3) ... [2020-12-21 21:57:04,665 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum60.i [2020-12-21 21:57:04,685 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:57:04,697 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 21:57:04,750 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 21:57:04,806 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:57:04,807 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:57:04,808 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:57:04,808 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:57:04,808 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:57:04,808 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:57:04,808 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:57:04,808 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:57:04,830 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-12-21 21:57:04,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-21 21:57:04,838 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:04,839 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:04,839 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:04,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:04,847 INFO L82 PathProgramCache]: Analyzing trace with hash -919167012, now seen corresponding path program 1 times [2020-12-21 21:57:04,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:04,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083032589] [2020-12-21 21:57:04,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:05,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:05,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:57:05,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083032589] [2020-12-21 21:57:05,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:57:05,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 21:57:05,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276570317] [2020-12-21 21:57:05,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 21:57:05,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:05,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 21:57:05,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 21:57:05,170 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2020-12-21 21:57:05,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:05,201 INFO L93 Difference]: Finished difference Result 56 states and 86 transitions. [2020-12-21 21:57:05,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 21:57:05,203 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2020-12-21 21:57:05,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:05,226 INFO L225 Difference]: With dead ends: 56 [2020-12-21 21:57:05,227 INFO L226 Difference]: Without dead ends: 26 [2020-12-21 21:57:05,231 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 [2020-12-21 21:57:05,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-21 21:57:05,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-21 21:57:05,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-21 21:57:05,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2020-12-21 21:57:05,271 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 17 [2020-12-21 21:57:05,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:05,271 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2020-12-21 21:57:05,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 21:57:05,272 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2020-12-21 21:57:05,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-21 21:57:05,274 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:05,274 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:05,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:57:05,276 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:05,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:05,279 INFO L82 PathProgramCache]: Analyzing trace with hash 164788593, now seen corresponding path program 1 times [2020-12-21 21:57:05,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:05,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663923662] [2020-12-21 21:57:05,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:05,324 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:05,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2122479494] [2020-12-21 21:57:05,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:05,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:05,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-21 21:57:05,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:05,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:57:05,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663923662] [2020-12-21 21:57:05,503 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:05,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122479494] [2020-12-21 21:57:05,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:57:05,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:57:05,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990778046] [2020-12-21 21:57:05,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:57:05,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:05,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:57:05,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:57:05,507 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 3 states. [2020-12-21 21:57:05,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:05,524 INFO L93 Difference]: Finished difference Result 50 states and 70 transitions. [2020-12-21 21:57:05,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:57:05,525 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-12-21 21:57:05,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:05,526 INFO L225 Difference]: With dead ends: 50 [2020-12-21 21:57:05,526 INFO L226 Difference]: Without dead ends: 28 [2020-12-21 21:57:05,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:57:05,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-21 21:57:05,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-12-21 21:57:05,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-21 21:57:05,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2020-12-21 21:57:05,533 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 17 [2020-12-21 21:57:05,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:05,534 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2020-12-21 21:57:05,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:57:05,534 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2020-12-21 21:57:05,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-21 21:57:05,535 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:05,535 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:05,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-21 21:57:05,749 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:05,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:05,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1403287377, now seen corresponding path program 1 times [2020-12-21 21:57:05,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:05,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741263017] [2020-12-21 21:57:05,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:05,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:05,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:57:05,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741263017] [2020-12-21 21:57:05,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227182773] [2020-12-21 21:57:05,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:05,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:05,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-21 21:57:05,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:05,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:57:05,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:05,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-21 21:57:05,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098589189] [2020-12-21 21:57:05,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:57:05,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:05,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:57:05,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:05,924 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 3 states. [2020-12-21 21:57:05,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:05,982 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2020-12-21 21:57:05,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:57:05,983 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-12-21 21:57:05,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:05,984 INFO L225 Difference]: With dead ends: 57 [2020-12-21 21:57:05,984 INFO L226 Difference]: Without dead ends: 36 [2020-12-21 21:57:05,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:05,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-21 21:57:05,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-12-21 21:57:05,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-21 21:57:05,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2020-12-21 21:57:05,992 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2020-12-21 21:57:05,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:05,993 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2020-12-21 21:57:05,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:57:05,993 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2020-12-21 21:57:05,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-21 21:57:05,994 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:05,994 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:06,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:06,211 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:06,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:06,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1132417868, now seen corresponding path program 1 times [2020-12-21 21:57:06,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:06,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903098691] [2020-12-21 21:57:06,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:06,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:06,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-21 21:57:06,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903098691] [2020-12-21 21:57:06,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586038824] [2020-12-21 21:57:06,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:06,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:06,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-21 21:57:06,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:06,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 21:57:06,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:06,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-21 21:57:06,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296328141] [2020-12-21 21:57:06,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:57:06,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:06,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:57:06,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:06,356 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand 3 states. [2020-12-21 21:57:06,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:06,389 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2020-12-21 21:57:06,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:57:06,390 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-12-21 21:57:06,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:06,391 INFO L225 Difference]: With dead ends: 46 [2020-12-21 21:57:06,392 INFO L226 Difference]: Without dead ends: 35 [2020-12-21 21:57:06,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:06,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-21 21:57:06,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-12-21 21:57:06,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-21 21:57:06,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2020-12-21 21:57:06,408 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 28 [2020-12-21 21:57:06,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:06,409 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2020-12-21 21:57:06,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:57:06,410 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2020-12-21 21:57:06,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-21 21:57:06,413 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:06,413 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:06,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:06,615 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:06,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:06,616 INFO L82 PathProgramCache]: Analyzing trace with hash 513768630, now seen corresponding path program 1 times [2020-12-21 21:57:06,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:06,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927646268] [2020-12-21 21:57:06,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:06,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:06,655 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 21:57:06,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927646268] [2020-12-21 21:57:06,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46911348] [2020-12-21 21:57:06,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:06,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:06,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:57:06,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:06,777 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 21:57:06,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:06,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-21 21:57:06,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399142433] [2020-12-21 21:57:06,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:57:06,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:06,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:57:06,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:06,780 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand 3 states. [2020-12-21 21:57:06,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:06,818 INFO L93 Difference]: Finished difference Result 78 states and 103 transitions. [2020-12-21 21:57:06,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:57:06,818 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-12-21 21:57:06,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:06,820 INFO L225 Difference]: With dead ends: 78 [2020-12-21 21:57:06,820 INFO L226 Difference]: Without dead ends: 56 [2020-12-21 21:57:06,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:06,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-21 21:57:06,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2020-12-21 21:57:06,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-21 21:57:06,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 62 transitions. [2020-12-21 21:57:06,827 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 62 transitions. Word has length 30 [2020-12-21 21:57:06,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:06,828 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 62 transitions. [2020-12-21 21:57:06,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:57:06,828 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 62 transitions. [2020-12-21 21:57:06,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-21 21:57:06,829 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:06,829 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:07,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:07,044 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:07,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:07,045 INFO L82 PathProgramCache]: Analyzing trace with hash -303820238, now seen corresponding path program 1 times [2020-12-21 21:57:07,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:07,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305102874] [2020-12-21 21:57:07,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:07,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:07,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 21:57:07,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305102874] [2020-12-21 21:57:07,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460911916] [2020-12-21 21:57:07,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:07,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:07,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:57:07,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:07,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 21:57:07,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:57:07,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:57:07,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657800370] [2020-12-21 21:57:07,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:57:07,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:07,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:57:07,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:07,229 INFO L87 Difference]: Start difference. First operand 46 states and 62 transitions. Second operand 5 states. [2020-12-21 21:57:07,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:07,251 INFO L93 Difference]: Finished difference Result 90 states and 122 transitions. [2020-12-21 21:57:07,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:57:07,251 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-12-21 21:57:07,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:07,252 INFO L225 Difference]: With dead ends: 90 [2020-12-21 21:57:07,252 INFO L226 Difference]: Without dead ends: 49 [2020-12-21 21:57:07,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:07,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-21 21:57:07,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-12-21 21:57:07,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-21 21:57:07,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2020-12-21 21:57:07,259 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 30 [2020-12-21 21:57:07,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:07,259 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2020-12-21 21:57:07,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:57:07,260 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2020-12-21 21:57:07,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-21 21:57:07,261 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:07,261 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:07,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-21 21:57:07,475 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:07,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:07,475 INFO L82 PathProgramCache]: Analyzing trace with hash 612513716, now seen corresponding path program 2 times [2020-12-21 21:57:07,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:07,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442839931] [2020-12-21 21:57:07,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:07,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:07,545 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-21 21:57:07,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442839931] [2020-12-21 21:57:07,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670741235] [2020-12-21 21:57:07,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:07,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-21 21:57:07,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:07,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 21:57:07,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:07,713 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-21 21:57:07,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:07,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2020-12-21 21:57:07,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234410216] [2020-12-21 21:57:07,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:57:07,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:07,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:57:07,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:57:07,715 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand 8 states. [2020-12-21 21:57:07,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:07,787 INFO L93 Difference]: Finished difference Result 114 states and 143 transitions. [2020-12-21 21:57:07,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 21:57:07,788 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-12-21 21:57:07,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:07,790 INFO L225 Difference]: With dead ends: 114 [2020-12-21 21:57:07,790 INFO L226 Difference]: Without dead ends: 109 [2020-12-21 21:57:07,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:57:07,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-21 21:57:07,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-12-21 21:57:07,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-21 21:57:07,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 98 transitions. [2020-12-21 21:57:07,801 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 98 transitions. Word has length 32 [2020-12-21 21:57:07,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:07,801 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 98 transitions. [2020-12-21 21:57:07,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:57:07,802 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 98 transitions. [2020-12-21 21:57:07,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-21 21:57:07,803 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:07,803 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:08,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:08,018 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:08,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:08,020 INFO L82 PathProgramCache]: Analyzing trace with hash -582685651, now seen corresponding path program 1 times [2020-12-21 21:57:08,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:08,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674846345] [2020-12-21 21:57:08,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:08,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:08,066 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-21 21:57:08,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674846345] [2020-12-21 21:57:08,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986824805] [2020-12-21 21:57:08,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:08,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:08,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:57:08,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:08,236 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-21 21:57:08,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:57:08,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-21 21:57:08,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587642701] [2020-12-21 21:57:08,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:57:08,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:08,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:57:08,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:57:08,238 INFO L87 Difference]: Start difference. First operand 73 states and 98 transitions. Second operand 7 states. [2020-12-21 21:57:08,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:08,352 INFO L93 Difference]: Finished difference Result 162 states and 221 transitions. [2020-12-21 21:57:08,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:57:08,353 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-12-21 21:57:08,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:08,358 INFO L225 Difference]: With dead ends: 162 [2020-12-21 21:57:08,358 INFO L226 Difference]: Without dead ends: 96 [2020-12-21 21:57:08,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:57:08,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-21 21:57:08,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2020-12-21 21:57:08,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-21 21:57:08,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 115 transitions. [2020-12-21 21:57:08,377 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 115 transitions. Word has length 35 [2020-12-21 21:57:08,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:08,377 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 115 transitions. [2020-12-21 21:57:08,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:57:08,378 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 115 transitions. [2020-12-21 21:57:08,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-21 21:57:08,384 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:08,384 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:08,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:08,587 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:08,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:08,588 INFO L82 PathProgramCache]: Analyzing trace with hash 2109979210, now seen corresponding path program 2 times [2020-12-21 21:57:08,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:08,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107383281] [2020-12-21 21:57:08,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:08,607 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:08,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1556016650] [2020-12-21 21:57:08,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:08,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:57:08,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:08,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:57:08,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:08,772 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-12-21 21:57:08,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107383281] [2020-12-21 21:57:08,773 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:08,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556016650] [2020-12-21 21:57:08,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:08,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 21:57:08,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295294650] [2020-12-21 21:57:08,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 21:57:08,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:08,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 21:57:08,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:57:08,775 INFO L87 Difference]: Start difference. First operand 90 states and 115 transitions. Second operand 6 states. [2020-12-21 21:57:08,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:08,798 INFO L93 Difference]: Finished difference Result 174 states and 224 transitions. [2020-12-21 21:57:08,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:57:08,799 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-12-21 21:57:08,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:08,799 INFO L225 Difference]: With dead ends: 174 [2020-12-21 21:57:08,800 INFO L226 Difference]: Without dead ends: 93 [2020-12-21 21:57:08,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:57:08,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-21 21:57:08,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-12-21 21:57:08,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-21 21:57:08,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 117 transitions. [2020-12-21 21:57:08,808 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 117 transitions. Word has length 46 [2020-12-21 21:57:08,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:08,808 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 117 transitions. [2020-12-21 21:57:08,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 21:57:08,809 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 117 transitions. [2020-12-21 21:57:08,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-21 21:57:08,810 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:08,810 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:09,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-21 21:57:09,024 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:09,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:09,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1002085324, now seen corresponding path program 3 times [2020-12-21 21:57:09,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:09,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513444075] [2020-12-21 21:57:09,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:09,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:09,084 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-21 21:57:09,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513444075] [2020-12-21 21:57:09,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:57:09,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 21:57:09,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727865828] [2020-12-21 21:57:09,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 21:57:09,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:09,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 21:57:09,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:57:09,087 INFO L87 Difference]: Start difference. First operand 92 states and 117 transitions. Second operand 4 states. [2020-12-21 21:57:09,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:09,163 INFO L93 Difference]: Finished difference Result 177 states and 232 transitions. [2020-12-21 21:57:09,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:57:09,163 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-12-21 21:57:09,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:09,164 INFO L225 Difference]: With dead ends: 177 [2020-12-21 21:57:09,165 INFO L226 Difference]: Without dead ends: 108 [2020-12-21 21:57:09,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:57:09,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-21 21:57:09,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 83. [2020-12-21 21:57:09,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-21 21:57:09,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 99 transitions. [2020-12-21 21:57:09,174 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 99 transitions. Word has length 48 [2020-12-21 21:57:09,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:09,174 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 99 transitions. [2020-12-21 21:57:09,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 21:57:09,174 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 99 transitions. [2020-12-21 21:57:09,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-21 21:57:09,176 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:09,176 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:09,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-21 21:57:09,176 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:09,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:09,177 INFO L82 PathProgramCache]: Analyzing trace with hash 238121238, now seen corresponding path program 1 times [2020-12-21 21:57:09,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:09,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602924253] [2020-12-21 21:57:09,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:09,191 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:09,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [625797476] [2020-12-21 21:57:09,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:09,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:09,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:57:09,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:09,348 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-21 21:57:09,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602924253] [2020-12-21 21:57:09,348 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:09,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625797476] [2020-12-21 21:57:09,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:09,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-21 21:57:09,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103085920] [2020-12-21 21:57:09,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:57:09,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:09,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:57:09,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:57:09,351 INFO L87 Difference]: Start difference. First operand 83 states and 99 transitions. Second operand 7 states. [2020-12-21 21:57:09,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:09,377 INFO L93 Difference]: Finished difference Result 158 states and 190 transitions. [2020-12-21 21:57:09,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:57:09,377 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-12-21 21:57:09,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:09,378 INFO L225 Difference]: With dead ends: 158 [2020-12-21 21:57:09,378 INFO L226 Difference]: Without dead ends: 86 [2020-12-21 21:57:09,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:57:09,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-21 21:57:09,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-12-21 21:57:09,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-21 21:57:09,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 101 transitions. [2020-12-21 21:57:09,404 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 101 transitions. Word has length 54 [2020-12-21 21:57:09,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:09,405 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 101 transitions. [2020-12-21 21:57:09,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:57:09,405 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 101 transitions. [2020-12-21 21:57:09,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-21 21:57:09,406 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:09,409 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:09,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:09,624 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:09,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:09,625 INFO L82 PathProgramCache]: Analyzing trace with hash -428363624, now seen corresponding path program 2 times [2020-12-21 21:57:09,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:09,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313447013] [2020-12-21 21:57:09,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:09,648 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:09,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1204079849] [2020-12-21 21:57:09,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:09,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:57:09,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:09,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:57:09,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:09,872 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-21 21:57:09,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313447013] [2020-12-21 21:57:09,872 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:09,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204079849] [2020-12-21 21:57:09,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:09,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 21:57:09,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925227522] [2020-12-21 21:57:09,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:57:09,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:09,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:57:09,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:57:09,875 INFO L87 Difference]: Start difference. First operand 85 states and 101 transitions. Second operand 8 states. [2020-12-21 21:57:09,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:09,905 INFO L93 Difference]: Finished difference Result 160 states and 192 transitions. [2020-12-21 21:57:09,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 21:57:09,906 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2020-12-21 21:57:09,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:09,907 INFO L225 Difference]: With dead ends: 160 [2020-12-21 21:57:09,907 INFO L226 Difference]: Without dead ends: 88 [2020-12-21 21:57:09,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:57:09,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-21 21:57:09,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-12-21 21:57:09,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-21 21:57:09,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 103 transitions. [2020-12-21 21:57:09,929 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 103 transitions. Word has length 56 [2020-12-21 21:57:09,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:09,930 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 103 transitions. [2020-12-21 21:57:09,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:57:09,931 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 103 transitions. [2020-12-21 21:57:09,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-21 21:57:09,932 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:09,932 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:10,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:10,148 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:10,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:10,149 INFO L82 PathProgramCache]: Analyzing trace with hash -970188902, now seen corresponding path program 3 times [2020-12-21 21:57:10,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:10,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689386434] [2020-12-21 21:57:10,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:10,166 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:10,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1038448247] [2020-12-21 21:57:10,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:10,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 21:57:10,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:10,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:57:10,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:10,313 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-12-21 21:57:10,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689386434] [2020-12-21 21:57:10,314 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:10,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038448247] [2020-12-21 21:57:10,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:57:10,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 21:57:10,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86794320] [2020-12-21 21:57:10,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 21:57:10,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:10,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 21:57:10,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:57:10,316 INFO L87 Difference]: Start difference. First operand 87 states and 103 transitions. Second operand 4 states. [2020-12-21 21:57:10,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:10,350 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2020-12-21 21:57:10,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:57:10,351 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-12-21 21:57:10,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:10,352 INFO L225 Difference]: With dead ends: 116 [2020-12-21 21:57:10,352 INFO L226 Difference]: Without dead ends: 68 [2020-12-21 21:57:10,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:57:10,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-21 21:57:10,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 59. [2020-12-21 21:57:10,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-21 21:57:10,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2020-12-21 21:57:10,357 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 58 [2020-12-21 21:57:10,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:10,358 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2020-12-21 21:57:10,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 21:57:10,358 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2020-12-21 21:57:10,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-21 21:57:10,359 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:10,359 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:10,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-21 21:57:10,576 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:10,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:10,577 INFO L82 PathProgramCache]: Analyzing trace with hash -152540452, now seen corresponding path program 1 times [2020-12-21 21:57:10,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:10,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57609941] [2020-12-21 21:57:10,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:10,592 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:10,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1854961715] [2020-12-21 21:57:10,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:10,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:10,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:57:10,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:10,805 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-21 21:57:10,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57609941] [2020-12-21 21:57:10,805 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:10,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854961715] [2020-12-21 21:57:10,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:10,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-21 21:57:10,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494569874] [2020-12-21 21:57:10,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:57:10,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:10,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:57:10,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:57:10,807 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand 9 states. [2020-12-21 21:57:10,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:10,847 INFO L93 Difference]: Finished difference Result 106 states and 120 transitions. [2020-12-21 21:57:10,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:57:10,848 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-12-21 21:57:10,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:10,848 INFO L225 Difference]: With dead ends: 106 [2020-12-21 21:57:10,849 INFO L226 Difference]: Without dead ends: 62 [2020-12-21 21:57:10,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:57:10,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-21 21:57:10,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-12-21 21:57:10,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-21 21:57:10,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2020-12-21 21:57:10,854 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 58 [2020-12-21 21:57:10,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:10,854 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2020-12-21 21:57:10,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:57:10,854 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2020-12-21 21:57:10,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-21 21:57:10,855 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:10,855 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:11,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-21 21:57:11,070 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:11,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:11,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1155589794, now seen corresponding path program 2 times [2020-12-21 21:57:11,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:11,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653517506] [2020-12-21 21:57:11,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:11,104 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:11,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1793652516] [2020-12-21 21:57:11,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:11,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:57:11,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:11,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:57:11,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:11,320 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-21 21:57:11,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653517506] [2020-12-21 21:57:11,321 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:11,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793652516] [2020-12-21 21:57:11,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:11,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-21 21:57:11,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501342242] [2020-12-21 21:57:11,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 21:57:11,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:11,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 21:57:11,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:57:11,323 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand 10 states. [2020-12-21 21:57:11,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:11,360 INFO L93 Difference]: Finished difference Result 108 states and 122 transitions. [2020-12-21 21:57:11,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:57:11,360 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-12-21 21:57:11,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:11,361 INFO L225 Difference]: With dead ends: 108 [2020-12-21 21:57:11,361 INFO L226 Difference]: Without dead ends: 64 [2020-12-21 21:57:11,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:57:11,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-21 21:57:11,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-12-21 21:57:11,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-21 21:57:11,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2020-12-21 21:57:11,366 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 60 [2020-12-21 21:57:11,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:11,366 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2020-12-21 21:57:11,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 21:57:11,367 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2020-12-21 21:57:11,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-21 21:57:11,367 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:11,367 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:11,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-21 21:57:11,582 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:11,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:11,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1281634144, now seen corresponding path program 3 times [2020-12-21 21:57:11,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:11,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138902651] [2020-12-21 21:57:11,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:11,611 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:11,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [918061977] [2020-12-21 21:57:11,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:11,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 21:57:11,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:11,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:57:11,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:11,763 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-21 21:57:11,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138902651] [2020-12-21 21:57:11,764 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:11,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918061977] [2020-12-21 21:57:11,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:11,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-21 21:57:11,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701002994] [2020-12-21 21:57:11,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 21:57:11,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:11,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 21:57:11,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:57:11,766 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand 4 states. [2020-12-21 21:57:11,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:11,788 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2020-12-21 21:57:11,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:57:11,788 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2020-12-21 21:57:11,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:11,789 INFO L225 Difference]: With dead ends: 82 [2020-12-21 21:57:11,789 INFO L226 Difference]: Without dead ends: 66 [2020-12-21 21:57:11,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:57:11,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-21 21:57:11,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-12-21 21:57:11,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-21 21:57:11,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2020-12-21 21:57:11,794 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 62 [2020-12-21 21:57:11,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:11,794 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2020-12-21 21:57:11,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 21:57:11,794 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2020-12-21 21:57:11,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-21 21:57:11,795 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:11,795 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:12,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:12,002 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:12,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:12,003 INFO L82 PathProgramCache]: Analyzing trace with hash 377274978, now seen corresponding path program 4 times [2020-12-21 21:57:12,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:12,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150570232] [2020-12-21 21:57:12,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:12,025 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:12,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [882418109] [2020-12-21 21:57:12,025 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:12,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:57:12,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:12,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:57:12,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:12,235 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-21 21:57:12,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150570232] [2020-12-21 21:57:12,236 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:12,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882418109] [2020-12-21 21:57:12,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:12,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-21 21:57:12,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319580464] [2020-12-21 21:57:12,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:57:12,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:12,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:57:12,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:12,238 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand 5 states. [2020-12-21 21:57:12,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:12,320 INFO L93 Difference]: Finished difference Result 117 states and 133 transitions. [2020-12-21 21:57:12,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 21:57:12,321 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-12-21 21:57:12,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:12,322 INFO L225 Difference]: With dead ends: 117 [2020-12-21 21:57:12,322 INFO L226 Difference]: Without dead ends: 77 [2020-12-21 21:57:12,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:12,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-21 21:57:12,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2020-12-21 21:57:12,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-21 21:57:12,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2020-12-21 21:57:12,327 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 64 [2020-12-21 21:57:12,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:12,328 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2020-12-21 21:57:12,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:57:12,328 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2020-12-21 21:57:12,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-21 21:57:12,329 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:12,329 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:12,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-21 21:57:12,544 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:12,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:12,545 INFO L82 PathProgramCache]: Analyzing trace with hash -790114983, now seen corresponding path program 5 times [2020-12-21 21:57:12,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:12,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487996767] [2020-12-21 21:57:12,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:12,564 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:12,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [109990565] [2020-12-21 21:57:12,565 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:12,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-12-21 21:57:12,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:12,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:57:12,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:12,806 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-12-21 21:57:12,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487996767] [2020-12-21 21:57:12,807 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:12,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109990565] [2020-12-21 21:57:12,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:12,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 21:57:12,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086113591] [2020-12-21 21:57:12,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 21:57:12,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:12,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 21:57:12,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:57:12,812 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand 6 states. [2020-12-21 21:57:12,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:12,899 INFO L93 Difference]: Finished difference Result 132 states and 148 transitions. [2020-12-21 21:57:12,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:57:12,899 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-12-21 21:57:12,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:12,900 INFO L225 Difference]: With dead ends: 132 [2020-12-21 21:57:12,900 INFO L226 Difference]: Without dead ends: 86 [2020-12-21 21:57:12,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:57:12,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-21 21:57:12,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2020-12-21 21:57:12,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-21 21:57:12,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2020-12-21 21:57:12,907 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 73 [2020-12-21 21:57:12,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:12,907 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2020-12-21 21:57:12,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 21:57:12,907 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2020-12-21 21:57:12,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-21 21:57:12,908 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:12,908 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:13,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-21 21:57:13,122 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:13,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:13,123 INFO L82 PathProgramCache]: Analyzing trace with hash 426299330, now seen corresponding path program 6 times [2020-12-21 21:57:13,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:13,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915270300] [2020-12-21 21:57:13,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:13,140 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:13,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1905773081] [2020-12-21 21:57:13,141 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:13,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-21 21:57:13,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:13,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:57:13,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:13,560 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-12-21 21:57:13,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915270300] [2020-12-21 21:57:13,560 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:13,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905773081] [2020-12-21 21:57:13,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:13,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-21 21:57:13,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547221379] [2020-12-21 21:57:13,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:57:13,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:13,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:57:13,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:13,562 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand 5 states. [2020-12-21 21:57:13,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:13,590 INFO L93 Difference]: Finished difference Result 108 states and 117 transitions. [2020-12-21 21:57:13,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 21:57:13,590 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 82 [2020-12-21 21:57:13,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:13,594 INFO L225 Difference]: With dead ends: 108 [2020-12-21 21:57:13,594 INFO L226 Difference]: Without dead ends: 86 [2020-12-21 21:57:13,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:13,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-21 21:57:13,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-12-21 21:57:13,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-21 21:57:13,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2020-12-21 21:57:13,602 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 82 [2020-12-21 21:57:13,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:13,602 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2020-12-21 21:57:13,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:57:13,602 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2020-12-21 21:57:13,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-21 21:57:13,603 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:13,603 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:13,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:13,817 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:13,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:13,818 INFO L82 PathProgramCache]: Analyzing trace with hash -105690940, now seen corresponding path program 7 times [2020-12-21 21:57:13,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:13,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609772634] [2020-12-21 21:57:13,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:13,830 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:13,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [740164181] [2020-12-21 21:57:13,831 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:13,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:13,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:57:13,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:14,089 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2020-12-21 21:57:14,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609772634] [2020-12-21 21:57:14,089 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:14,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740164181] [2020-12-21 21:57:14,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:14,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-21 21:57:14,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965601853] [2020-12-21 21:57:14,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 21:57:14,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:14,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 21:57:14,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:57:14,092 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand 11 states. [2020-12-21 21:57:14,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:14,135 INFO L93 Difference]: Finished difference Result 154 states and 168 transitions. [2020-12-21 21:57:14,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 21:57:14,136 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 84 [2020-12-21 21:57:14,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:14,137 INFO L225 Difference]: With dead ends: 154 [2020-12-21 21:57:14,137 INFO L226 Difference]: Without dead ends: 88 [2020-12-21 21:57:14,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:57:14,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-21 21:57:14,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-12-21 21:57:14,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-21 21:57:14,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 94 transitions. [2020-12-21 21:57:14,142 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 94 transitions. Word has length 84 [2020-12-21 21:57:14,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:14,143 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 94 transitions. [2020-12-21 21:57:14,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 21:57:14,143 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 94 transitions. [2020-12-21 21:57:14,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-21 21:57:14,144 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:14,144 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:14,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:14,360 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:14,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:14,361 INFO L82 PathProgramCache]: Analyzing trace with hash 2063005894, now seen corresponding path program 8 times [2020-12-21 21:57:14,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:14,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779566475] [2020-12-21 21:57:14,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:14,375 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:14,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [727496254] [2020-12-21 21:57:14,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:14,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:57:14,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:14,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 21:57:14,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:14,634 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2020-12-21 21:57:14,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779566475] [2020-12-21 21:57:14,634 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:14,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727496254] [2020-12-21 21:57:14,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:14,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-21 21:57:14,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365027784] [2020-12-21 21:57:14,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:57:14,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:14,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:57:14,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:57:14,636 INFO L87 Difference]: Start difference. First operand 87 states and 94 transitions. Second operand 12 states. [2020-12-21 21:57:14,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:14,677 INFO L93 Difference]: Finished difference Result 156 states and 170 transitions. [2020-12-21 21:57:14,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 21:57:14,678 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 86 [2020-12-21 21:57:14,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:14,678 INFO L225 Difference]: With dead ends: 156 [2020-12-21 21:57:14,679 INFO L226 Difference]: Without dead ends: 90 [2020-12-21 21:57:14,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:57:14,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-21 21:57:14,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-12-21 21:57:14,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-21 21:57:14,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 96 transitions. [2020-12-21 21:57:14,684 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 96 transitions. Word has length 86 [2020-12-21 21:57:14,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:14,685 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 96 transitions. [2020-12-21 21:57:14,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:57:14,685 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 96 transitions. [2020-12-21 21:57:14,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-21 21:57:14,686 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:14,686 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:14,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:14,902 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:14,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:14,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1173442488, now seen corresponding path program 9 times [2020-12-21 21:57:14,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:14,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3403325] [2020-12-21 21:57:14,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:14,918 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:14,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1510362690] [2020-12-21 21:57:14,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:15,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 21:57:15,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:15,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:57:15,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:15,519 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2020-12-21 21:57:15,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3403325] [2020-12-21 21:57:15,519 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:15,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510362690] [2020-12-21 21:57:15,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:15,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-21 21:57:15,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551856294] [2020-12-21 21:57:15,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:57:15,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:15,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:57:15,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:15,521 INFO L87 Difference]: Start difference. First operand 89 states and 96 transitions. Second operand 5 states. [2020-12-21 21:57:15,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:15,599 INFO L93 Difference]: Finished difference Result 153 states and 173 transitions. [2020-12-21 21:57:15,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 21:57:15,599 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 88 [2020-12-21 21:57:15,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:15,600 INFO L225 Difference]: With dead ends: 153 [2020-12-21 21:57:15,601 INFO L226 Difference]: Without dead ends: 104 [2020-12-21 21:57:15,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:15,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-21 21:57:15,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 98. [2020-12-21 21:57:15,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-21 21:57:15,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2020-12-21 21:57:15,608 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 88 [2020-12-21 21:57:15,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:15,609 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2020-12-21 21:57:15,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:57:15,609 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2020-12-21 21:57:15,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-21 21:57:15,610 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:15,610 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:15,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-21 21:57:15,826 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:15,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:15,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1409703947, now seen corresponding path program 10 times [2020-12-21 21:57:15,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:15,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313420016] [2020-12-21 21:57:15,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:15,851 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:15,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1037002426] [2020-12-21 21:57:15,854 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:15,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:57:15,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:15,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 21:57:15,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:16,126 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-12-21 21:57:16,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313420016] [2020-12-21 21:57:16,126 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:16,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037002426] [2020-12-21 21:57:16,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:16,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-21 21:57:16,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167407078] [2020-12-21 21:57:16,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 21:57:16,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:16,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 21:57:16,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:57:16,129 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand 13 states. [2020-12-21 21:57:16,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:16,174 INFO L93 Difference]: Finished difference Result 176 states and 196 transitions. [2020-12-21 21:57:16,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 21:57:16,174 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 97 [2020-12-21 21:57:16,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:16,175 INFO L225 Difference]: With dead ends: 176 [2020-12-21 21:57:16,175 INFO L226 Difference]: Without dead ends: 101 [2020-12-21 21:57:16,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:57:16,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-21 21:57:16,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-12-21 21:57:16,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-21 21:57:16,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2020-12-21 21:57:16,181 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 97 [2020-12-21 21:57:16,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:16,182 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2020-12-21 21:57:16,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 21:57:16,182 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2020-12-21 21:57:16,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-21 21:57:16,183 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:16,183 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 6, 6, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:16,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-21 21:57:16,396 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:16,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:16,397 INFO L82 PathProgramCache]: Analyzing trace with hash -839941325, now seen corresponding path program 11 times [2020-12-21 21:57:16,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:16,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379135456] [2020-12-21 21:57:16,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:16,411 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:16,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1823842595] [2020-12-21 21:57:16,411 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:16,821 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-21 21:57:16,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:16,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:57:16,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:16,952 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-12-21 21:57:16,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379135456] [2020-12-21 21:57:16,953 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:16,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823842595] [2020-12-21 21:57:16,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:16,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-21 21:57:16,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011114362] [2020-12-21 21:57:16,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:57:16,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:16,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:57:16,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:57:16,955 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand 7 states. [2020-12-21 21:57:17,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:17,053 INFO L93 Difference]: Finished difference Result 175 states and 197 transitions. [2020-12-21 21:57:17,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:57:17,054 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 99 [2020-12-21 21:57:17,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:17,058 INFO L225 Difference]: With dead ends: 175 [2020-12-21 21:57:17,058 INFO L226 Difference]: Without dead ends: 112 [2020-12-21 21:57:17,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:57:17,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-21 21:57:17,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2020-12-21 21:57:17,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-21 21:57:17,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 119 transitions. [2020-12-21 21:57:17,065 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 119 transitions. Word has length 99 [2020-12-21 21:57:17,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:17,065 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 119 transitions. [2020-12-21 21:57:17,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:57:17,065 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 119 transitions. [2020-12-21 21:57:17,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-21 21:57:17,066 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:17,067 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 7, 7, 7, 7, 7, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:17,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:17,282 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:17,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:17,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1344803056, now seen corresponding path program 12 times [2020-12-21 21:57:17,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:17,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861341085] [2020-12-21 21:57:17,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:17,308 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:17,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1315210305] [2020-12-21 21:57:17,308 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:17,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-21 21:57:17,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:17,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:57:17,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:17,982 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2020-12-21 21:57:17,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861341085] [2020-12-21 21:57:17,982 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:17,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315210305] [2020-12-21 21:57:17,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:17,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 21:57:17,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844859435] [2020-12-21 21:57:17,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 21:57:17,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:17,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 21:57:17,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:57:17,984 INFO L87 Difference]: Start difference. First operand 109 states and 119 transitions. Second operand 6 states. [2020-12-21 21:57:18,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:18,008 INFO L93 Difference]: Finished difference Result 140 states and 153 transitions. [2020-12-21 21:57:18,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:57:18,009 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 108 [2020-12-21 21:57:18,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:18,010 INFO L225 Difference]: With dead ends: 140 [2020-12-21 21:57:18,010 INFO L226 Difference]: Without dead ends: 112 [2020-12-21 21:57:18,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:57:18,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-21 21:57:18,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-12-21 21:57:18,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-21 21:57:18,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 121 transitions. [2020-12-21 21:57:18,017 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 121 transitions. Word has length 108 [2020-12-21 21:57:18,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:18,017 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 121 transitions. [2020-12-21 21:57:18,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 21:57:18,017 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 121 transitions. [2020-12-21 21:57:18,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-21 21:57:18,018 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:18,018 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 7, 7, 7, 7, 7, 5, 5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:18,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-21 21:57:18,233 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:18,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:18,234 INFO L82 PathProgramCache]: Analyzing trace with hash 2042426738, now seen corresponding path program 13 times [2020-12-21 21:57:18,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:18,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941108631] [2020-12-21 21:57:18,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:18,253 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:18,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2033732690] [2020-12-21 21:57:18,253 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:18,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:18,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 21:57:18,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:18,614 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2020-12-21 21:57:18,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941108631] [2020-12-21 21:57:18,615 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:18,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033732690] [2020-12-21 21:57:18,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:18,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-12-21 21:57:18,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372819860] [2020-12-21 21:57:18,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:57:18,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:18,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:57:18,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:57:18,618 INFO L87 Difference]: Start difference. First operand 111 states and 121 transitions. Second operand 14 states. [2020-12-21 21:57:18,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:18,680 INFO L93 Difference]: Finished difference Result 200 states and 220 transitions. [2020-12-21 21:57:18,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 21:57:18,682 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 110 [2020-12-21 21:57:18,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:18,683 INFO L225 Difference]: With dead ends: 200 [2020-12-21 21:57:18,683 INFO L226 Difference]: Without dead ends: 114 [2020-12-21 21:57:18,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:57:18,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-21 21:57:18,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-12-21 21:57:18,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-21 21:57:18,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 123 transitions. [2020-12-21 21:57:18,690 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 123 transitions. Word has length 110 [2020-12-21 21:57:18,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:18,690 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 123 transitions. [2020-12-21 21:57:18,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:57:18,691 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 123 transitions. [2020-12-21 21:57:18,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-21 21:57:18,692 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:18,692 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 7, 7, 7, 7, 5, 5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:18,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:18,906 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:18,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:18,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1265026804, now seen corresponding path program 14 times [2020-12-21 21:57:18,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:18,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366794311] [2020-12-21 21:57:18,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:18,923 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:18,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [999223311] [2020-12-21 21:57:18,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:19,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:57:19,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:19,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 21:57:19,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:19,238 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2020-12-21 21:57:19,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366794311] [2020-12-21 21:57:19,238 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:19,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999223311] [2020-12-21 21:57:19,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:19,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-12-21 21:57:19,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829528123] [2020-12-21 21:57:19,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-21 21:57:19,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:19,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-21 21:57:19,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 21:57:19,241 INFO L87 Difference]: Start difference. First operand 113 states and 123 transitions. Second operand 15 states. [2020-12-21 21:57:19,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:19,292 INFO L93 Difference]: Finished difference Result 202 states and 222 transitions. [2020-12-21 21:57:19,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-21 21:57:19,292 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 112 [2020-12-21 21:57:19,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:19,293 INFO L225 Difference]: With dead ends: 202 [2020-12-21 21:57:19,294 INFO L226 Difference]: Without dead ends: 116 [2020-12-21 21:57:19,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 21:57:19,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-12-21 21:57:19,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-12-21 21:57:19,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-21 21:57:19,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 125 transitions. [2020-12-21 21:57:19,300 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 125 transitions. Word has length 112 [2020-12-21 21:57:19,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:19,300 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 125 transitions. [2020-12-21 21:57:19,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-21 21:57:19,301 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 125 transitions. [2020-12-21 21:57:19,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-21 21:57:19,301 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:19,301 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 7, 7, 7, 7, 7, 7, 5, 5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:19,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-21 21:57:19,504 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:19,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:19,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1507999734, now seen corresponding path program 15 times [2020-12-21 21:57:19,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:19,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840878912] [2020-12-21 21:57:19,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:19,519 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:19,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [778391759] [2020-12-21 21:57:19,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:19,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-21 21:57:19,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:19,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:57:19,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:20,021 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2020-12-21 21:57:20,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840878912] [2020-12-21 21:57:20,022 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:20,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778391759] [2020-12-21 21:57:20,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:20,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 21:57:20,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218654824] [2020-12-21 21:57:20,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 21:57:20,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:20,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 21:57:20,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:57:20,024 INFO L87 Difference]: Start difference. First operand 115 states and 125 transitions. Second operand 6 states. [2020-12-21 21:57:20,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:20,139 INFO L93 Difference]: Finished difference Result 193 states and 218 transitions. [2020-12-21 21:57:20,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:57:20,140 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2020-12-21 21:57:20,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:20,142 INFO L225 Difference]: With dead ends: 193 [2020-12-21 21:57:20,142 INFO L226 Difference]: Without dead ends: 130 [2020-12-21 21:57:20,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:57:20,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-12-21 21:57:20,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 124. [2020-12-21 21:57:20,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-12-21 21:57:20,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 137 transitions. [2020-12-21 21:57:20,148 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 137 transitions. Word has length 114 [2020-12-21 21:57:20,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:20,149 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 137 transitions. [2020-12-21 21:57:20,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 21:57:20,149 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 137 transitions. [2020-12-21 21:57:20,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-12-21 21:57:20,150 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:20,150 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 8, 8, 8, 8, 8, 8, 5, 5, 5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:20,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-21 21:57:20,361 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:20,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:20,362 INFO L82 PathProgramCache]: Analyzing trace with hash 631086347, now seen corresponding path program 16 times [2020-12-21 21:57:20,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:20,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029386571] [2020-12-21 21:57:20,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:20,376 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:20,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1038563269] [2020-12-21 21:57:20,377 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:20,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:57:20,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:20,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:57:20,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:20,631 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 45 proven. 40 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-12-21 21:57:20,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029386571] [2020-12-21 21:57:20,632 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:20,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038563269] [2020-12-21 21:57:20,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:20,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-21 21:57:20,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376782570] [2020-12-21 21:57:20,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:57:20,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:20,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:57:20,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:57:20,633 INFO L87 Difference]: Start difference. First operand 124 states and 137 transitions. Second operand 9 states. [2020-12-21 21:57:20,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:20,808 INFO L93 Difference]: Finished difference Result 226 states and 268 transitions. [2020-12-21 21:57:20,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:57:20,808 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 123 [2020-12-21 21:57:20,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:20,810 INFO L225 Difference]: With dead ends: 226 [2020-12-21 21:57:20,810 INFO L226 Difference]: Without dead ends: 157 [2020-12-21 21:57:20,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:57:20,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-12-21 21:57:20,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 151. [2020-12-21 21:57:20,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-12-21 21:57:20,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 173 transitions. [2020-12-21 21:57:20,817 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 173 transitions. Word has length 123 [2020-12-21 21:57:20,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:20,817 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 173 transitions. [2020-12-21 21:57:20,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:57:20,817 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 173 transitions. [2020-12-21 21:57:20,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-12-21 21:57:20,818 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:20,818 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 11, 11, 11, 11, 11, 6, 6, 6, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:21,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-21 21:57:21,032 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:21,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:21,033 INFO L82 PathProgramCache]: Analyzing trace with hash -466148810, now seen corresponding path program 17 times [2020-12-21 21:57:21,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:21,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808503580] [2020-12-21 21:57:21,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:21,048 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:21,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1664680065] [2020-12-21 21:57:21,049 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:21,430 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-12-21 21:57:21,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:21,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:57:21,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:21,600 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 96 proven. 40 refuted. 0 times theorem prover too weak. 577 trivial. 0 not checked. [2020-12-21 21:57:21,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808503580] [2020-12-21 21:57:21,601 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:21,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664680065] [2020-12-21 21:57:21,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:21,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 21:57:21,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402046658] [2020-12-21 21:57:21,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:57:21,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:21,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:57:21,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:57:21,603 INFO L87 Difference]: Start difference. First operand 151 states and 173 transitions. Second operand 8 states. [2020-12-21 21:57:21,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:21,719 INFO L93 Difference]: Finished difference Result 270 states and 316 transitions. [2020-12-21 21:57:21,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 21:57:21,719 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 150 [2020-12-21 21:57:21,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:21,721 INFO L225 Difference]: With dead ends: 270 [2020-12-21 21:57:21,721 INFO L226 Difference]: Without dead ends: 163 [2020-12-21 21:57:21,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:57:21,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-12-21 21:57:21,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 160. [2020-12-21 21:57:21,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-12-21 21:57:21,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 182 transitions. [2020-12-21 21:57:21,728 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 182 transitions. Word has length 150 [2020-12-21 21:57:21,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:21,729 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 182 transitions. [2020-12-21 21:57:21,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:57:21,729 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 182 transitions. [2020-12-21 21:57:21,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-12-21 21:57:21,730 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:21,730 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:21,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:21,941 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:21,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:21,942 INFO L82 PathProgramCache]: Analyzing trace with hash -755311091, now seen corresponding path program 18 times [2020-12-21 21:57:21,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:21,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908007126] [2020-12-21 21:57:21,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:21,957 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:21,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1206765434] [2020-12-21 21:57:21,957 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:22,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-21 21:57:22,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:22,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:57:22,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:22,688 INFO L134 CoverageAnalysis]: Checked inductivity of 815 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 799 trivial. 0 not checked. [2020-12-21 21:57:22,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908007126] [2020-12-21 21:57:22,688 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:22,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206765434] [2020-12-21 21:57:22,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:22,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-21 21:57:22,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111661311] [2020-12-21 21:57:22,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:57:22,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:22,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:57:22,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:57:22,690 INFO L87 Difference]: Start difference. First operand 160 states and 182 transitions. Second operand 7 states. [2020-12-21 21:57:22,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:22,723 INFO L93 Difference]: Finished difference Result 206 states and 235 transitions. [2020-12-21 21:57:22,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:57:22,724 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 159 [2020-12-21 21:57:22,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:22,725 INFO L225 Difference]: With dead ends: 206 [2020-12-21 21:57:22,725 INFO L226 Difference]: Without dead ends: 163 [2020-12-21 21:57:22,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:57:22,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-12-21 21:57:22,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2020-12-21 21:57:22,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-12-21 21:57:22,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 184 transitions. [2020-12-21 21:57:22,733 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 184 transitions. Word has length 159 [2020-12-21 21:57:22,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:22,733 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 184 transitions. [2020-12-21 21:57:22,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:57:22,733 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 184 transitions. [2020-12-21 21:57:22,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-12-21 21:57:22,734 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:22,734 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:22,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-21 21:57:22,949 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:22,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:22,950 INFO L82 PathProgramCache]: Analyzing trace with hash -902385397, now seen corresponding path program 19 times [2020-12-21 21:57:22,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:22,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841807481] [2020-12-21 21:57:22,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:22,965 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:22,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1081203152] [2020-12-21 21:57:22,966 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:23,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:23,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 21:57:23,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:23,408 INFO L134 CoverageAnalysis]: Checked inductivity of 824 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 655 trivial. 0 not checked. [2020-12-21 21:57:23,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841807481] [2020-12-21 21:57:23,409 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:23,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081203152] [2020-12-21 21:57:23,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:23,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-12-21 21:57:23,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437417212] [2020-12-21 21:57:23,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-21 21:57:23,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:23,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-21 21:57:23,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 21:57:23,411 INFO L87 Difference]: Start difference. First operand 162 states and 184 transitions. Second operand 16 states. [2020-12-21 21:57:23,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:23,480 INFO L93 Difference]: Finished difference Result 298 states and 342 transitions. [2020-12-21 21:57:23,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 21:57:23,482 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 161 [2020-12-21 21:57:23,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:23,483 INFO L225 Difference]: With dead ends: 298 [2020-12-21 21:57:23,483 INFO L226 Difference]: Without dead ends: 165 [2020-12-21 21:57:23,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 21:57:23,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-12-21 21:57:23,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2020-12-21 21:57:23,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-12-21 21:57:23,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 186 transitions. [2020-12-21 21:57:23,490 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 186 transitions. Word has length 161 [2020-12-21 21:57:23,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:23,490 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 186 transitions. [2020-12-21 21:57:23,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-21 21:57:23,491 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 186 transitions. [2020-12-21 21:57:23,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-12-21 21:57:23,491 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:23,492 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 12, 12, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:23,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:23,707 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:23,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:23,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1609802825, now seen corresponding path program 20 times [2020-12-21 21:57:23,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:23,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814869612] [2020-12-21 21:57:23,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:23,725 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:23,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1763568755] [2020-12-21 21:57:23,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:23,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:57:23,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:23,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 21:57:23,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:24,345 INFO L134 CoverageAnalysis]: Checked inductivity of 851 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 655 trivial. 0 not checked. [2020-12-21 21:57:24,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814869612] [2020-12-21 21:57:24,345 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:24,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763568755] [2020-12-21 21:57:24,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:24,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-12-21 21:57:24,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839700068] [2020-12-21 21:57:24,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-21 21:57:24,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:24,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-21 21:57:24,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:57:24,348 INFO L87 Difference]: Start difference. First operand 164 states and 186 transitions. Second operand 17 states. [2020-12-21 21:57:24,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:24,413 INFO L93 Difference]: Finished difference Result 300 states and 344 transitions. [2020-12-21 21:57:24,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-21 21:57:24,414 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 163 [2020-12-21 21:57:24,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:24,415 INFO L225 Difference]: With dead ends: 300 [2020-12-21 21:57:24,415 INFO L226 Difference]: Without dead ends: 167 [2020-12-21 21:57:24,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:57:24,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-12-21 21:57:24,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2020-12-21 21:57:24,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-12-21 21:57:24,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 188 transitions. [2020-12-21 21:57:24,422 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 188 transitions. Word has length 163 [2020-12-21 21:57:24,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:24,423 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 188 transitions. [2020-12-21 21:57:24,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-21 21:57:24,423 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 188 transitions. [2020-12-21 21:57:24,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-12-21 21:57:24,424 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:24,424 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:24,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-21 21:57:24,629 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:24,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:24,630 INFO L82 PathProgramCache]: Analyzing trace with hash 2051063815, now seen corresponding path program 21 times [2020-12-21 21:57:24,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:24,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781126971] [2020-12-21 21:57:24,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:24,648 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:24,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [833569228] [2020-12-21 21:57:24,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:24,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-21 21:57:24,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:24,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:57:24,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:25,146 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-12-21 21:57:25,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781126971] [2020-12-21 21:57:25,146 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:25,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833569228] [2020-12-21 21:57:25,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:25,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 21:57:25,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834427098] [2020-12-21 21:57:25,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:57:25,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:25,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:57:25,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:57:25,148 INFO L87 Difference]: Start difference. First operand 166 states and 188 transitions. Second operand 8 states. [2020-12-21 21:57:25,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:25,182 INFO L93 Difference]: Finished difference Result 212 states and 241 transitions. [2020-12-21 21:57:25,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 21:57:25,183 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 165 [2020-12-21 21:57:25,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:25,184 INFO L225 Difference]: With dead ends: 212 [2020-12-21 21:57:25,185 INFO L226 Difference]: Without dead ends: 169 [2020-12-21 21:57:25,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:57:25,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-12-21 21:57:25,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2020-12-21 21:57:25,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-12-21 21:57:25,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 190 transitions. [2020-12-21 21:57:25,191 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 190 transitions. Word has length 165 [2020-12-21 21:57:25,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:25,192 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 190 transitions. [2020-12-21 21:57:25,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:57:25,192 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 190 transitions. [2020-12-21 21:57:25,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-12-21 21:57:25,193 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:25,193 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:25,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-21 21:57:25,406 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:25,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:25,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1215562619, now seen corresponding path program 22 times [2020-12-21 21:57:25,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:25,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935087782] [2020-12-21 21:57:25,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:25,422 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:25,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [629626136] [2020-12-21 21:57:25,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:25,554 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:57:25,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:25,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 21:57:25,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:25,839 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 53 proven. 155 refuted. 0 times theorem prover too weak. 683 trivial. 0 not checked. [2020-12-21 21:57:25,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935087782] [2020-12-21 21:57:25,840 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:25,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629626136] [2020-12-21 21:57:25,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:25,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-12-21 21:57:25,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980138868] [2020-12-21 21:57:25,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:57:25,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:25,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:57:25,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:57:25,842 INFO L87 Difference]: Start difference. First operand 168 states and 190 transitions. Second operand 14 states. [2020-12-21 21:57:26,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:26,163 INFO L93 Difference]: Finished difference Result 316 states and 385 transitions. [2020-12-21 21:57:26,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 21:57:26,164 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 167 [2020-12-21 21:57:26,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:26,166 INFO L225 Difference]: With dead ends: 316 [2020-12-21 21:57:26,166 INFO L226 Difference]: Without dead ends: 219 [2020-12-21 21:57:26,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:57:26,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-12-21 21:57:26,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 213. [2020-12-21 21:57:26,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-12-21 21:57:26,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 250 transitions. [2020-12-21 21:57:26,174 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 250 transitions. Word has length 167 [2020-12-21 21:57:26,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:26,175 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 250 transitions. [2020-12-21 21:57:26,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:57:26,175 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 250 transitions. [2020-12-21 21:57:26,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-12-21 21:57:26,176 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:26,176 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 15, 15, 11, 11, 11, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:26,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-21 21:57:26,390 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:26,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:26,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1651850840, now seen corresponding path program 23 times [2020-12-21 21:57:26,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:26,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359783376] [2020-12-21 21:57:26,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:26,409 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:26,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1228698352] [2020-12-21 21:57:26,409 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:27,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-21 21:57:27,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:27,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:57:27,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:27,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1536 backedges. 213 proven. 57 refuted. 0 times theorem prover too weak. 1266 trivial. 0 not checked. [2020-12-21 21:57:27,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359783376] [2020-12-21 21:57:27,891 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:27,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228698352] [2020-12-21 21:57:27,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:27,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-21 21:57:27,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100614056] [2020-12-21 21:57:27,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:57:27,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:27,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:57:27,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:57:27,893 INFO L87 Difference]: Start difference. First operand 213 states and 250 transitions. Second operand 9 states. [2020-12-21 21:57:28,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:28,061 INFO L93 Difference]: Finished difference Result 387 states and 463 transitions. [2020-12-21 21:57:28,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:57:28,061 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 212 [2020-12-21 21:57:28,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:28,062 INFO L225 Difference]: With dead ends: 387 [2020-12-21 21:57:28,062 INFO L226 Difference]: Without dead ends: 225 [2020-12-21 21:57:28,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:57:28,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-12-21 21:57:28,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 222. [2020-12-21 21:57:28,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-12-21 21:57:28,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 259 transitions. [2020-12-21 21:57:28,071 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 259 transitions. Word has length 212 [2020-12-21 21:57:28,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:28,072 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 259 transitions. [2020-12-21 21:57:28,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:57:28,072 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 259 transitions. [2020-12-21 21:57:28,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-12-21 21:57:28,073 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:28,073 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 15, 15, 11, 11, 11, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:28,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-21 21:57:28,287 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:28,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:28,288 INFO L82 PathProgramCache]: Analyzing trace with hash 20245667, now seen corresponding path program 24 times [2020-12-21 21:57:28,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:28,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218843170] [2020-12-21 21:57:28,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:28,309 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:28,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [434998309] [2020-12-21 21:57:28,309 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:29,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-21 21:57:29,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:29,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:57:29,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:29,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1692 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1656 trivial. 0 not checked. [2020-12-21 21:57:29,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218843170] [2020-12-21 21:57:29,293 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:29,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434998309] [2020-12-21 21:57:29,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:29,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-21 21:57:29,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980953375] [2020-12-21 21:57:29,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:57:29,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:29,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:57:29,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:57:29,295 INFO L87 Difference]: Start difference. First operand 222 states and 259 transitions. Second operand 9 states. [2020-12-21 21:57:29,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:29,332 INFO L93 Difference]: Finished difference Result 286 states and 335 transitions. [2020-12-21 21:57:29,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:57:29,332 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 221 [2020-12-21 21:57:29,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:29,334 INFO L225 Difference]: With dead ends: 286 [2020-12-21 21:57:29,334 INFO L226 Difference]: Without dead ends: 225 [2020-12-21 21:57:29,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:57:29,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-12-21 21:57:29,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 224. [2020-12-21 21:57:29,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-12-21 21:57:29,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 261 transitions. [2020-12-21 21:57:29,343 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 261 transitions. Word has length 221 [2020-12-21 21:57:29,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:29,344 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 261 transitions. [2020-12-21 21:57:29,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:57:29,344 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 261 transitions. [2020-12-21 21:57:29,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-12-21 21:57:29,345 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:29,345 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 15, 15, 11, 11, 11, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:29,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-21 21:57:29,559 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:29,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:29,560 INFO L82 PathProgramCache]: Analyzing trace with hash 2073585185, now seen corresponding path program 25 times [2020-12-21 21:57:29,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:29,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523340878] [2020-12-21 21:57:29,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:29,579 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:29,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1381779642] [2020-12-21 21:57:29,579 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:29,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:29,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-21 21:57:29,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:30,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1480 trivial. 0 not checked. [2020-12-21 21:57:30,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523340878] [2020-12-21 21:57:30,112 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:30,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381779642] [2020-12-21 21:57:30,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:30,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-12-21 21:57:30,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635101235] [2020-12-21 21:57:30,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 21:57:30,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:30,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 21:57:30,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:57:30,115 INFO L87 Difference]: Start difference. First operand 224 states and 261 transitions. Second operand 18 states. [2020-12-21 21:57:30,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:30,182 INFO L93 Difference]: Finished difference Result 418 states and 492 transitions. [2020-12-21 21:57:30,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 21:57:30,183 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 223 [2020-12-21 21:57:30,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:30,184 INFO L225 Difference]: With dead ends: 418 [2020-12-21 21:57:30,185 INFO L226 Difference]: Without dead ends: 227 [2020-12-21 21:57:30,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:57:30,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-12-21 21:57:30,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 226. [2020-12-21 21:57:30,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-12-21 21:57:30,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 263 transitions. [2020-12-21 21:57:30,192 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 263 transitions. Word has length 223 [2020-12-21 21:57:30,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:30,193 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 263 transitions. [2020-12-21 21:57:30,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 21:57:30,193 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 263 transitions. [2020-12-21 21:57:30,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-12-21 21:57:30,194 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:30,194 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 16, 16, 11, 11, 11, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:30,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-21 21:57:30,409 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:30,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:30,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1482678049, now seen corresponding path program 26 times [2020-12-21 21:57:30,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:30,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623371202] [2020-12-21 21:57:30,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:30,429 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:30,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [274934694] [2020-12-21 21:57:30,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:30,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:57:30,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:30,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-21 21:57:30,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:30,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1480 trivial. 0 not checked. [2020-12-21 21:57:30,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623371202] [2020-12-21 21:57:30,991 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:30,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274934694] [2020-12-21 21:57:30,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:30,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-12-21 21:57:30,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46724779] [2020-12-21 21:57:30,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-21 21:57:30,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:30,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-21 21:57:30,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-21 21:57:30,993 INFO L87 Difference]: Start difference. First operand 226 states and 263 transitions. Second operand 19 states. [2020-12-21 21:57:31,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:31,066 INFO L93 Difference]: Finished difference Result 420 states and 494 transitions. [2020-12-21 21:57:31,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-21 21:57:31,067 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 225 [2020-12-21 21:57:31,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:31,068 INFO L225 Difference]: With dead ends: 420 [2020-12-21 21:57:31,068 INFO L226 Difference]: Without dead ends: 229 [2020-12-21 21:57:31,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-21 21:57:31,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-12-21 21:57:31,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 228. [2020-12-21 21:57:31,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-12-21 21:57:31,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 265 transitions. [2020-12-21 21:57:31,078 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 265 transitions. Word has length 225 [2020-12-21 21:57:31,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:31,078 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 265 transitions. [2020-12-21 21:57:31,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-21 21:57:31,078 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 265 transitions. [2020-12-21 21:57:31,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-12-21 21:57:31,080 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:31,080 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 17, 17, 11, 11, 11, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:31,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-21 21:57:31,294 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:31,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:31,295 INFO L82 PathProgramCache]: Analyzing trace with hash -257678307, now seen corresponding path program 27 times [2020-12-21 21:57:31,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:31,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993519976] [2020-12-21 21:57:31,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:31,322 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:31,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [661952108] [2020-12-21 21:57:31,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true