/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:57:12,543 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:57:12,547 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:57:12,609 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 04:57:12,610 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 04:57:12,614 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 04:57:12,619 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 04:57:12,628 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 04:57:12,632 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 04:57:12,640 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 04:57:12,641 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 04:57:12,643 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 04:57:12,643 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 04:57:12,646 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 04:57:12,648 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 04:57:12,663 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 04:57:12,664 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 04:57:12,664 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 04:57:12,666 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 04:57:12,668 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 04:57:12,670 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 04:57:12,671 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 04:57:12,673 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 04:57:12,673 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 04:57:12,676 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 04:57:12,680 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 04:57:12,681 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 04:57:12,681 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 04:57:12,682 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 04:57:12,683 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 04:57:12,684 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 04:57:12,684 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 04:57:12,685 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 04:57:12,685 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 04:57:12,686 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 04:57:12,687 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 04:57:12,689 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:57:12,714 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:57:12,714 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:57:12,716 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:57:12,716 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:57:12,716 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:57:12,717 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:57:12,717 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:57:12,717 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:57:12,717 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:57:12,718 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:57:12,718 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:57:12,718 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:57:12,718 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:57:12,718 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:57:12,719 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:57:12,719 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:57:12,719 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:57:12,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:57:12,720 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:57:12,720 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:57:12,720 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:57:12,720 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:57:12,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:57:12,721 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:57:12,721 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:57:12,721 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:57:13,106 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:57:13,136 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:57:13,139 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:57:13,141 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:57:13,141 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:57:13,142 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound100.c [2020-12-22 04:57:13,213 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c33bd6faa/a79416fd8353406f872348bf9c455cb8/FLAGfc8889cb4 [2020-12-22 04:57:13,791 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:57:13,791 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound100.c [2020-12-22 04:57:13,798 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c33bd6faa/a79416fd8353406f872348bf9c455cb8/FLAGfc8889cb4 [2020-12-22 04:57:14,171 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c33bd6faa/a79416fd8353406f872348bf9c455cb8 [2020-12-22 04:57:14,177 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:57:14,179 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:57:14,183 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:57:14,183 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:57:14,187 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:57:14,188 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:57:14" (1/1) ... [2020-12-22 04:57:14,190 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66b089fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:57:14, skipping insertion in model container [2020-12-22 04:57:14,191 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:57:14" (1/1) ... [2020-12-22 04:57:14,204 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:57:14,227 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:57:14,384 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/nla-digbench-scaling/bresenham-ll_valuebound100.c[597,610] [2020-12-22 04:57:14,402 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:57:14,419 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:57:14,435 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/nla-digbench-scaling/bresenham-ll_valuebound100.c[597,610] [2020-12-22 04:57:14,465 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:57:14,489 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:57:14,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:57:14 WrapperNode [2020-12-22 04:57:14,491 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:57:14,495 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:57:14,496 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:57:14,496 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:57:14,505 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:57:14" (1/1) ... [2020-12-22 04:57:14,517 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:57:14" (1/1) ... [2020-12-22 04:57:14,549 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:57:14,552 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:57:14,552 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:57:14,553 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:57:14,564 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:57:14" (1/1) ... [2020-12-22 04:57:14,564 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:57:14" (1/1) ... [2020-12-22 04:57:14,578 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:57:14" (1/1) ... [2020-12-22 04:57:14,578 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:57:14" (1/1) ... [2020-12-22 04:57:14,590 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:57:14" (1/1) ... [2020-12-22 04:57:14,601 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:57:14" (1/1) ... [2020-12-22 04:57:14,605 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:57:14" (1/1) ... [2020-12-22 04:57:14,611 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:57:14,613 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:57:14,613 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:57:14,613 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:57:14,617 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:57:14" (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 [2020-12-22 04:57:14,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:57:14,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:57:14,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:57:14,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:57:15,022 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:57:15,023 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-22 04:57:15,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:57:15 BoogieIcfgContainer [2020-12-22 04:57:15,025 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:57:15,026 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:57:15,027 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:57:15,030 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:57:15,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:57:14" (1/3) ... [2020-12-22 04:57:15,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a677f23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:57:15, skipping insertion in model container [2020-12-22 04:57:15,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:57:14" (2/3) ... [2020-12-22 04:57:15,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a677f23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:57:15, skipping insertion in model container [2020-12-22 04:57:15,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:57:15" (3/3) ... [2020-12-22 04:57:15,034 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_valuebound100.c [2020-12-22 04:57:15,042 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:57:15,047 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 04:57:15,094 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 04:57:15,150 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:57:15,150 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:57:15,150 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:57:15,151 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:57:15,151 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:57:15,151 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:57:15,151 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:57:15,151 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:57:15,168 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-12-22 04:57:15,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 04:57:15,175 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:57:15,176 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:57:15,176 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:57:15,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:57:15,184 INFO L82 PathProgramCache]: Analyzing trace with hash -594062832, now seen corresponding path program 1 times [2020-12-22 04:57:15,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:57:15,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016246523] [2020-12-22 04:57:15,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:57:15,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:57:15,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:57:15,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016246523] [2020-12-22 04:57:15,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:57:15,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 04:57:15,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350306427] [2020-12-22 04:57:15,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 04:57:15,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:57:15,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 04:57:15,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 04:57:15,417 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-12-22 04:57:15,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:57:15,436 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2020-12-22 04:57:15,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 04:57:15,438 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-12-22 04:57:15,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:57:15,447 INFO L225 Difference]: With dead ends: 39 [2020-12-22 04:57:15,447 INFO L226 Difference]: Without dead ends: 17 [2020-12-22 04:57:15,451 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 [2020-12-22 04:57:15,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-22 04:57:15,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-22 04:57:15,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-22 04:57:15,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-12-22 04:57:15,487 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 9 [2020-12-22 04:57:15,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:57:15,487 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-12-22 04:57:15,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 04:57:15,488 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-12-22 04:57:15,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 04:57:15,488 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:57:15,488 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:57:15,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:57:15,489 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:57:15,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:57:15,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1182791572, now seen corresponding path program 1 times [2020-12-22 04:57:15,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:57:15,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434867948] [2020-12-22 04:57:15,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:57:15,523 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:57:15,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1675120547] [2020-12-22 04:57:15,524 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 [2020-12-22 04:57:15,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:57:15,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 04:57:15,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:57:15,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:57:15,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434867948] [2020-12-22 04:57:15,801 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:57:15,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675120547] [2020-12-22 04:57:15,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:57:15,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 04:57:15,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536608983] [2020-12-22 04:57:15,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 04:57:15,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:57:15,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 04:57:15,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:57:15,806 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 6 states. [2020-12-22 04:57:15,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:57:15,940 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-12-22 04:57:15,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 04:57:15,944 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-12-22 04:57:15,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:57:15,945 INFO L225 Difference]: With dead ends: 29 [2020-12-22 04:57:15,945 INFO L226 Difference]: Without dead ends: 23 [2020-12-22 04:57:15,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:57:15,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-22 04:57:15,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-12-22 04:57:15,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-22 04:57:15,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-12-22 04:57:15,957 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 9 [2020-12-22 04:57:15,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:57:15,958 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-12-22 04:57:15,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 04:57:15,959 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-12-22 04:57:15,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 04:57:15,959 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:57:15,960 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:57:16,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 04:57:16,161 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:57:16,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:57:16,163 INFO L82 PathProgramCache]: Analyzing trace with hash -2039286562, now seen corresponding path program 1 times [2020-12-22 04:57:16,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:57:16,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040298387] [2020-12-22 04:57:16,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:57:16,204 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:57:16,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [801516167] [2020-12-22 04:57:16,209 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 [2020-12-22 04:57:16,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:57:16,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 04:57:16,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:57:16,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:57:16,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040298387] [2020-12-22 04:57:16,458 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:57:16,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801516167] [2020-12-22 04:57:16,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:57:16,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-22 04:57:16,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260744015] [2020-12-22 04:57:16,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 04:57:16,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:57:16,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 04:57:16,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:57:16,461 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2020-12-22 04:57:16,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:57:16,682 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-12-22 04:57:16,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 04:57:16,682 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-12-22 04:57:16,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:57:16,684 INFO L225 Difference]: With dead ends: 34 [2020-12-22 04:57:16,684 INFO L226 Difference]: Without dead ends: 28 [2020-12-22 04:57:16,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:57:16,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-22 04:57:16,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2020-12-22 04:57:16,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-22 04:57:16,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-12-22 04:57:16,692 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 14 [2020-12-22 04:57:16,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:57:16,692 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-12-22 04:57:16,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 04:57:16,693 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-12-22 04:57:16,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 04:57:16,693 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:57:16,694 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:57:16,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:57:16,908 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:57:16,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:57:16,910 INFO L82 PathProgramCache]: Analyzing trace with hash -2037439520, now seen corresponding path program 1 times [2020-12-22 04:57:16,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:57:16,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004633430] [2020-12-22 04:57:16,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:57:16,930 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:57:16,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1617812047] [2020-12-22 04:57:16,931 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 [2020-12-22 04:57:16,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:57:17,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 04:57:17,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:57:17,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:57:17,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004633430] [2020-12-22 04:57:17,138 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:57:17,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617812047] [2020-12-22 04:57:17,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:57:17,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-22 04:57:17,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324937485] [2020-12-22 04:57:17,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 04:57:17,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:57:17,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 04:57:17,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:57:17,141 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 8 states. [2020-12-22 04:57:17,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:57:17,339 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2020-12-22 04:57:17,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 04:57:17,340 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-12-22 04:57:17,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:57:17,341 INFO L225 Difference]: With dead ends: 38 [2020-12-22 04:57:17,341 INFO L226 Difference]: Without dead ends: 36 [2020-12-22 04:57:17,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:57:17,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-22 04:57:17,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2020-12-22 04:57:17,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-22 04:57:17,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-12-22 04:57:17,348 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 14 [2020-12-22 04:57:17,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:57:17,348 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-12-22 04:57:17,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 04:57:17,348 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-12-22 04:57:17,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 04:57:17,349 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:57:17,349 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:57:17,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:57:17,564 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:57:17,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:57:17,566 INFO L82 PathProgramCache]: Analyzing trace with hash -878006574, now seen corresponding path program 1 times [2020-12-22 04:57:17,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:57:17,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279405021] [2020-12-22 04:57:17,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:57:17,585 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:57:17,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [686859764] [2020-12-22 04:57:17,585 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 [2020-12-22 04:57:17,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:57:17,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 04:57:17,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:57:17,876 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:57:17,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:57:17,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279405021] [2020-12-22 04:57:17,904 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:57:17,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686859764] [2020-12-22 04:57:17,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:57:17,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-22 04:57:17,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666510034] [2020-12-22 04:57:17,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 04:57:17,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:57:17,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 04:57:17,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:57:17,909 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 11 states. [2020-12-22 04:57:18,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:57:18,241 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-12-22 04:57:18,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 04:57:18,241 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2020-12-22 04:57:18,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:57:18,244 INFO L225 Difference]: With dead ends: 37 [2020-12-22 04:57:18,244 INFO L226 Difference]: Without dead ends: 33 [2020-12-22 04:57:18,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:57:18,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-22 04:57:18,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2020-12-22 04:57:18,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-22 04:57:18,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-12-22 04:57:18,259 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 17 [2020-12-22 04:57:18,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:57:18,259 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-12-22 04:57:18,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 04:57:18,260 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-12-22 04:57:18,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 04:57:18,260 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:57:18,260 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:57:18,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:57:18,475 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:57:18,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:57:18,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1508067884, now seen corresponding path program 2 times [2020-12-22 04:57:18,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:57:18,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630354035] [2020-12-22 04:57:18,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:57:18,495 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:57:18,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [937473494] [2020-12-22 04:57:18,496 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 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 [2020-12-22 04:57:18,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:57:18,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:57:18,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-22 04:57:18,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:57:18,830 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:57:18,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630354035] [2020-12-22 04:57:18,831 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:57:18,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937473494] [2020-12-22 04:57:18,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:57:18,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-22 04:57:18,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181153746] [2020-12-22 04:57:18,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:57:18,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:57:18,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:57:18,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:57:18,844 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 10 states. [2020-12-22 04:57:19,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:57:19,136 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2020-12-22 04:57:19,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 04:57:19,137 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-12-22 04:57:19,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:57:19,138 INFO L225 Difference]: With dead ends: 43 [2020-12-22 04:57:19,138 INFO L226 Difference]: Without dead ends: 37 [2020-12-22 04:57:19,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:57:19,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-22 04:57:19,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2020-12-22 04:57:19,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-22 04:57:19,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-12-22 04:57:19,145 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 19 [2020-12-22 04:57:19,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:57:19,146 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-12-22 04:57:19,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:57:19,146 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-12-22 04:57:19,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 04:57:19,147 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:57:19,147 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:57:19,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 04:57:19,361 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:57:19,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:57:19,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1506220842, now seen corresponding path program 1 times [2020-12-22 04:57:19,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:57:19,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871365108] [2020-12-22 04:57:19,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:57:19,377 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:57:19,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1723331085] [2020-12-22 04:57:19,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-22 04:57:19,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:57:19,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-22 04:57:19,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:57:19,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:57:19,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871365108] [2020-12-22 04:57:19,684 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:57:19,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723331085] [2020-12-22 04:57:19,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:57:19,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-22 04:57:19,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421009868] [2020-12-22 04:57:19,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 04:57:19,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:57:19,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 04:57:19,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:57:19,686 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 11 states. [2020-12-22 04:57:19,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:57:19,982 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2020-12-22 04:57:19,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 04:57:19,983 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2020-12-22 04:57:19,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:57:19,983 INFO L225 Difference]: With dead ends: 43 [2020-12-22 04:57:19,984 INFO L226 Difference]: Without dead ends: 41 [2020-12-22 04:57:19,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:57:19,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-22 04:57:19,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-12-22 04:57:19,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-22 04:57:19,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-12-22 04:57:19,991 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 19 [2020-12-22 04:57:19,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:57:19,991 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-12-22 04:57:19,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 04:57:19,991 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-12-22 04:57:19,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 04:57:19,992 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:57:19,992 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:57:20,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:57:20,209 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:57:20,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:57:20,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1901094894, now seen corresponding path program 2 times [2020-12-22 04:57:20,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:57:20,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385542210] [2020-12-22 04:57:20,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:57:20,227 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:57:20,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [597595405] [2020-12-22 04:57:20,228 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 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 [2020-12-22 04:57:20,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:57:20,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:57:20,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 04:57:20,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:57:20,385 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:57:20,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385542210] [2020-12-22 04:57:20,386 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:57:20,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597595405] [2020-12-22 04:57:20,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:57:20,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-22 04:57:20,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560583306] [2020-12-22 04:57:20,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:57:20,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:57:20,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:57:20,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:57:20,388 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 7 states. [2020-12-22 04:57:24,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:57:24,515 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2020-12-22 04:57:24,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 04:57:24,516 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-12-22 04:57:24,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:57:24,517 INFO L225 Difference]: With dead ends: 41 [2020-12-22 04:57:24,517 INFO L226 Difference]: Without dead ends: 39 [2020-12-22 04:57:24,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:57:24,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-22 04:57:24,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2020-12-22 04:57:24,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-22 04:57:24,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-12-22 04:57:24,525 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 19 [2020-12-22 04:57:24,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:57:24,525 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-12-22 04:57:24,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:57:24,525 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-12-22 04:57:24,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 04:57:24,526 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:57:24,526 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:57:24,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:57:24,727 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:57:24,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:57:24,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1899247852, now seen corresponding path program 2 times [2020-12-22 04:57:24,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:57:24,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835807299] [2020-12-22 04:57:24,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:57:24,740 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:57:24,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1816241751] [2020-12-22 04:57:24,741 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 [2020-12-22 04:57:24,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:57:24,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:57:24,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 04:57:24,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:57:25,037 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:57:25,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835807299] [2020-12-22 04:57:25,038 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:57:25,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816241751] [2020-12-22 04:57:25,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:57:25,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-22 04:57:25,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162767507] [2020-12-22 04:57:25,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:57:25,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:57:25,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:57:25,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:57:25,040 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 10 states. [2020-12-22 04:57:25,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:57:25,365 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2020-12-22 04:57:25,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 04:57:25,365 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-12-22 04:57:25,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:57:25,368 INFO L225 Difference]: With dead ends: 53 [2020-12-22 04:57:25,368 INFO L226 Difference]: Without dead ends: 51 [2020-12-22 04:57:25,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:57:25,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-22 04:57:25,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2020-12-22 04:57:25,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-22 04:57:25,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-12-22 04:57:25,398 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 19 [2020-12-22 04:57:25,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:57:25,398 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-12-22 04:57:25,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:57:25,399 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-12-22 04:57:25,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 04:57:25,399 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:57:25,400 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:57:25,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 04:57:25,600 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:57:25,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:57:25,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1998111260, now seen corresponding path program 1 times [2020-12-22 04:57:25,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:57:25,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756342186] [2020-12-22 04:57:25,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:57:25,626 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:57:25,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [375037375] [2020-12-22 04:57:25,627 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 [2020-12-22 04:57:25,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:57:25,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 04:57:25,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:57:25,800 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:57:25,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756342186] [2020-12-22 04:57:25,801 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:57:25,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375037375] [2020-12-22 04:57:25,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:57:25,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-22 04:57:25,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563288500] [2020-12-22 04:57:25,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:57:25,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:57:25,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:57:25,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:57:25,803 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 7 states. [2020-12-22 04:57:25,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:57:25,915 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2020-12-22 04:57:25,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:57:25,916 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-12-22 04:57:25,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:57:25,917 INFO L225 Difference]: With dead ends: 49 [2020-12-22 04:57:25,917 INFO L226 Difference]: Without dead ends: 45 [2020-12-22 04:57:25,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:57:25,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-22 04:57:25,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2020-12-22 04:57:25,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-22 04:57:25,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-12-22 04:57:25,926 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 22 [2020-12-22 04:57:25,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:57:25,927 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-12-22 04:57:25,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:57:25,927 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-12-22 04:57:25,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 04:57:25,928 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:57:25,928 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:57:26,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:57:26,142 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:57:26,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:57:26,143 INFO L82 PathProgramCache]: Analyzing trace with hash -2074315424, now seen corresponding path program 2 times [2020-12-22 04:57:26,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:57:26,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752400108] [2020-12-22 04:57:26,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:57:26,156 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:57:26,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2062235763] [2020-12-22 04:57:26,157 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 [2020-12-22 04:57:26,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:57:26,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:57:26,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 04:57:26,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:57:26,445 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:57:26,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752400108] [2020-12-22 04:57:26,445 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:57:26,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062235763] [2020-12-22 04:57:26,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:57:26,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-22 04:57:26,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41735449] [2020-12-22 04:57:26,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:57:26,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:57:26,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:57:26,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:57:26,448 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 7 states. [2020-12-22 04:57:26,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:57:26,582 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2020-12-22 04:57:26,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:57:26,582 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-12-22 04:57:26,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:57:26,584 INFO L225 Difference]: With dead ends: 49 [2020-12-22 04:57:26,584 INFO L226 Difference]: Without dead ends: 45 [2020-12-22 04:57:26,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:57:26,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-22 04:57:26,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2020-12-22 04:57:26,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-22 04:57:26,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-12-22 04:57:26,593 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 22 [2020-12-22 04:57:26,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:57:26,593 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-12-22 04:57:26,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:57:26,593 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-12-22 04:57:26,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 04:57:26,594 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:57:26,594 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:57:26,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:57:26,806 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:57:26,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:57:26,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1411305246, now seen corresponding path program 2 times [2020-12-22 04:57:26,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:57:26,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899149511] [2020-12-22 04:57:26,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:57:26,828 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:57:26,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [982064757] [2020-12-22 04:57:26,829 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 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 [2020-12-22 04:57:27,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:57:27,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:57:27,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 04:57:27,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:57:27,290 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:57:27,311 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:57:27,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899149511] [2020-12-22 04:57:27,312 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:57:27,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982064757] [2020-12-22 04:57:27,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:57:27,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-12-22 04:57:27,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283090309] [2020-12-22 04:57:27,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 04:57:27,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:57:27,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 04:57:27,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:57:27,314 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 14 states. [2020-12-22 04:57:27,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:57:27,636 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2020-12-22 04:57:27,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 04:57:27,637 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2020-12-22 04:57:27,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:57:27,637 INFO L225 Difference]: With dead ends: 52 [2020-12-22 04:57:27,637 INFO L226 Difference]: Without dead ends: 48 [2020-12-22 04:57:27,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:57:27,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-22 04:57:27,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 33. [2020-12-22 04:57:27,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-22 04:57:27,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-12-22 04:57:27,646 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 22 [2020-12-22 04:57:27,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:57:27,647 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-12-22 04:57:27,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 04:57:27,647 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-12-22 04:57:27,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 04:57:27,648 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:57:27,648 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:57:27,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 04:57:27,852 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:57:27,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:57:27,853 INFO L82 PathProgramCache]: Analyzing trace with hash 779046304, now seen corresponding path program 3 times [2020-12-22 04:57:27,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:57:27,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145370262] [2020-12-22 04:57:27,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:57:27,864 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:57:27,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [179493301] [2020-12-22 04:57:27,864 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 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 [2020-12-22 04:57:27,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 04:57:27,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:57:27,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 04:57:27,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:57:28,112 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 04:57:28,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145370262] [2020-12-22 04:57:28,113 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:57:28,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179493301] [2020-12-22 04:57:28,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:57:28,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-22 04:57:28,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921011076] [2020-12-22 04:57:28,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:57:28,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:57:28,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:57:28,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:57:28,115 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 10 states. [2020-12-22 04:57:28,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:57:28,392 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2020-12-22 04:57:28,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 04:57:28,392 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-12-22 04:57:28,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:57:28,393 INFO L225 Difference]: With dead ends: 71 [2020-12-22 04:57:28,393 INFO L226 Difference]: Without dead ends: 65 [2020-12-22 04:57:28,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:57:28,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-22 04:57:28,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 43. [2020-12-22 04:57:28,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-22 04:57:28,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2020-12-22 04:57:28,404 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 24 [2020-12-22 04:57:28,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:57:28,404 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2020-12-22 04:57:28,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:57:28,405 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2020-12-22 04:57:28,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 04:57:28,405 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:57:28,406 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:57:28,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 04:57:28,621 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:57:28,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:57:28,622 INFO L82 PathProgramCache]: Analyzing trace with hash 386019294, now seen corresponding path program 4 times [2020-12-22 04:57:28,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:57:28,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422744351] [2020-12-22 04:57:28,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:57:28,635 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:57:28,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1286748456] [2020-12-22 04:57:28,636 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 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 [2020-12-22 04:57:28,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:57:28,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:57:28,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 04:57:28,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:57:28,748 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:57:28,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422744351] [2020-12-22 04:57:28,749 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:57:28,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286748456] [2020-12-22 04:57:28,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:57:28,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-22 04:57:28,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936005320] [2020-12-22 04:57:28,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 04:57:28,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:57:28,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 04:57:28,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:57:28,755 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 5 states. [2020-12-22 04:57:28,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:57:28,829 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2020-12-22 04:57:28,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 04:57:28,829 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-12-22 04:57:28,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:57:28,830 INFO L225 Difference]: With dead ends: 84 [2020-12-22 04:57:28,830 INFO L226 Difference]: Without dead ends: 70 [2020-12-22 04:57:28,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:57:28,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-22 04:57:28,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 60. [2020-12-22 04:57:28,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-22 04:57:28,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2020-12-22 04:57:28,844 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 24 [2020-12-22 04:57:28,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:57:28,845 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2020-12-22 04:57:28,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 04:57:28,845 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2020-12-22 04:57:28,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 04:57:28,846 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:57:28,846 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:57:29,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 04:57:29,062 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:57:29,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:57:29,063 INFO L82 PathProgramCache]: Analyzing trace with hash -500817374, now seen corresponding path program 5 times [2020-12-22 04:57:29,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:57:29,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829023497] [2020-12-22 04:57:29,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:57:29,072 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:57:29,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [651476300] [2020-12-22 04:57:29,073 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 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 [2020-12-22 04:57:29,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-22 04:57:29,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:57:29,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-22 04:57:29,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:57:29,281 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:57:29,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829023497] [2020-12-22 04:57:29,281 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:57:29,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651476300] [2020-12-22 04:57:29,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:57:29,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-22 04:57:29,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316674907] [2020-12-22 04:57:29,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:57:29,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:57:29,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:57:29,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:57:29,283 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand 10 states. [2020-12-22 04:57:29,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:57:29,619 INFO L93 Difference]: Finished difference Result 80 states and 91 transitions. [2020-12-22 04:57:29,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 04:57:29,620 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-12-22 04:57:29,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:57:29,621 INFO L225 Difference]: With dead ends: 80 [2020-12-22 04:57:29,621 INFO L226 Difference]: Without dead ends: 78 [2020-12-22 04:57:29,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:57:29,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-22 04:57:29,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 65. [2020-12-22 04:57:29,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-22 04:57:29,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2020-12-22 04:57:29,635 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 24 [2020-12-22 04:57:29,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:57:29,636 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2020-12-22 04:57:29,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:57:29,636 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2020-12-22 04:57:29,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 04:57:29,637 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:57:29,637 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:57:29,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:57:29,851 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:57:29,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:57:29,852 INFO L82 PathProgramCache]: Analyzing trace with hash -893844384, now seen corresponding path program 3 times [2020-12-22 04:57:29,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:57:29,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105518097] [2020-12-22 04:57:29,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:57:29,860 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:57:29,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1569108299] [2020-12-22 04:57:29,861 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 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