/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-programs/partial_mod_count_limited_base.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 22:14:59,708 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 22:14:59,713 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 22:14:59,773 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 22:14:59,774 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 22:14:59,778 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 22:14:59,782 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 22:14:59,791 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 22:14:59,794 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 22:14:59,800 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 22:14:59,802 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 22:14:59,804 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 22:14:59,804 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 22:14:59,807 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 22:14:59,809 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 22:14:59,812 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 22:14:59,813 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 22:14:59,816 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 22:14:59,822 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 22:14:59,825 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 22:14:59,826 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 22:14:59,830 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 22:14:59,831 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 22:14:59,832 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 22:14:59,874 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 22:14:59,880 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-21 22:14:59,887 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-21 22:14:59,888 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-21 22:14:59,889 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-21 22:14:59,894 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-21 22:14:59,894 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-21 22:14:59,896 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-21 22:14:59,899 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-21 22:14:59,899 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 22:14:59,900 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 22:14:59,901 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 22:14:59,905 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 22:14:59,954 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 22:14:59,954 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 22:14:59,959 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 22:14:59,959 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 22:14:59,960 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 22:14:59,960 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 22:14:59,960 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 22:14:59,960 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 22:14:59,960 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 22:14:59,961 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 22:14:59,962 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 22:14:59,962 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 22:14:59,962 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 22:14:59,963 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 22:14:59,963 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 22:14:59,963 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 22:14:59,963 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 22:14:59,963 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:14:59,964 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 22:14:59,964 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 22:14:59,964 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 22:14:59,964 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 22:14:59,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 22:14:59,964 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 22:14:59,965 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 22:14:59,965 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 22:15:00,417 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 22:15:00,445 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 22:15:00,448 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 22:15:00,449 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 22:15:00,450 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 22:15:00,451 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/partial_mod_count_limited_base.c [2020-12-21 22:15:00,531 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1636b1bd4/4d4b84bd75c046d8830c83526b6e7e18/FLAGc70857cc6 [2020-12-21 22:15:01,248 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 22:15:01,248 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_limited_base.c [2020-12-21 22:15:01,256 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1636b1bd4/4d4b84bd75c046d8830c83526b6e7e18/FLAGc70857cc6 [2020-12-21 22:15:01,620 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1636b1bd4/4d4b84bd75c046d8830c83526b6e7e18 [2020-12-21 22:15:01,624 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 22:15:01,626 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 22:15:01,648 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 22:15:01,648 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 22:15:01,652 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 22:15:01,654 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:15:01" (1/1) ... [2020-12-21 22:15:01,656 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63cd256a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:15:01, skipping insertion in model container [2020-12-21 22:15:01,656 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:15:01" (1/1) ... [2020-12-21 22:15:01,666 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 22:15:01,684 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 22:15:01,835 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/array-programs/partial_mod_count_limited_base.c[334,347] [2020-12-21 22:15:01,861 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:15:01,871 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 22:15:01,884 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/array-programs/partial_mod_count_limited_base.c[334,347] [2020-12-21 22:15:01,893 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:15:01,911 INFO L208 MainTranslator]: Completed translation [2020-12-21 22:15:01,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:15:01 WrapperNode [2020-12-21 22:15:01,912 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 22:15:01,913 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 22:15:01,913 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 22:15:01,914 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 22:15:01,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:15:01" (1/1) ... [2020-12-21 22:15:01,931 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:15:01" (1/1) ... [2020-12-21 22:15:01,960 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 22:15:01,961 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 22:15:01,961 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 22:15:01,961 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 22:15:01,971 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:15:01" (1/1) ... [2020-12-21 22:15:01,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:15:01" (1/1) ... [2020-12-21 22:15:01,974 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:15:01" (1/1) ... [2020-12-21 22:15:01,975 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:15:01" (1/1) ... [2020-12-21 22:15:01,981 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:15:01" (1/1) ... [2020-12-21 22:15:01,986 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:15:01" (1/1) ... [2020-12-21 22:15:01,988 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:15:01" (1/1) ... [2020-12-21 22:15:01,991 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 22:15:01,992 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 22:15:01,993 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 22:15:01,993 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 22:15:01,994 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:15:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:15:02,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 22:15:02,164 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 22:15:02,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 22:15:02,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 22:15:02,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 22:15:02,165 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 22:15:02,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 22:15:02,503 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 22:15:02,504 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-21 22:15:02,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:15:02 BoogieIcfgContainer [2020-12-21 22:15:02,506 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 22:15:02,508 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 22:15:02,508 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 22:15:02,513 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 22:15:02,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:15:01" (1/3) ... [2020-12-21 22:15:02,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e4dfc87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:15:02, skipping insertion in model container [2020-12-21 22:15:02,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:15:01" (2/3) ... [2020-12-21 22:15:02,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e4dfc87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:15:02, skipping insertion in model container [2020-12-21 22:15:02,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:15:02" (3/3) ... [2020-12-21 22:15:02,518 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_base.c [2020-12-21 22:15:02,528 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 22:15:02,544 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 22:15:02,596 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 22:15:02,656 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 22:15:02,656 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 22:15:02,657 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 22:15:02,657 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 22:15:02,657 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 22:15:02,657 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 22:15:02,657 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 22:15:02,657 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 22:15:02,675 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-12-21 22:15:02,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-21 22:15:02,682 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:15:02,683 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:15:02,683 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:15:02,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:15:02,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1939796378, now seen corresponding path program 1 times [2020-12-21 22:15:02,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:15:02,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302013406] [2020-12-21 22:15:02,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:15:02,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:15:02,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:15:02,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302013406] [2020-12-21 22:15:02,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:15:02,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 22:15:02,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153992287] [2020-12-21 22:15:02,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 22:15:02,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:15:02,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 22:15:02,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:15:02,916 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-12-21 22:15:02,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:15:02,937 INFO L93 Difference]: Finished difference Result 39 states and 54 transitions. [2020-12-21 22:15:02,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 22:15:02,939 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-21 22:15:02,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:15:02,950 INFO L225 Difference]: With dead ends: 39 [2020-12-21 22:15:02,950 INFO L226 Difference]: Without dead ends: 17 [2020-12-21 22:15:02,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:15:02,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-21 22:15:02,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-21 22:15:02,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-21 22:15:02,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2020-12-21 22:15:02,993 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2020-12-21 22:15:02,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:15:02,993 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2020-12-21 22:15:02,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 22:15:02,994 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2020-12-21 22:15:02,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-21 22:15:02,994 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:15:02,994 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:15:02,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 22:15:02,995 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:15:02,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:15:02,996 INFO L82 PathProgramCache]: Analyzing trace with hash -54935082, now seen corresponding path program 1 times [2020-12-21 22:15:02,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:15:02,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823373088] [2020-12-21 22:15:02,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:15:03,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:15:03,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:15:03,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823373088] [2020-12-21 22:15:03,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:15:03,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 22:15:03,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12602544] [2020-12-21 22:15:03,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:15:03,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:15:03,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:15:03,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:15:03,167 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 4 states. [2020-12-21 22:15:03,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:15:03,308 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2020-12-21 22:15:03,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:15:03,309 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-21 22:15:03,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:15:03,311 INFO L225 Difference]: With dead ends: 42 [2020-12-21 22:15:03,311 INFO L226 Difference]: Without dead ends: 29 [2020-12-21 22:15:03,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:15:03,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-21 22:15:03,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2020-12-21 22:15:03,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-21 22:15:03,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-12-21 22:15:03,327 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2020-12-21 22:15:03,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:15:03,328 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-12-21 22:15:03,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:15:03,329 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-12-21 22:15:03,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-21 22:15:03,329 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:15:03,330 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:15:03,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-21 22:15:03,331 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:15:03,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:15:03,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1485448361, now seen corresponding path program 1 times [2020-12-21 22:15:03,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:15:03,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741845452] [2020-12-21 22:15:03,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:15:03,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:15:03,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:15:03,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741845452] [2020-12-21 22:15:03,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:15:03,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-21 22:15:03,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145902431] [2020-12-21 22:15:03,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:15:03,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:15:03,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:15:03,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:15:03,530 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 5 states. [2020-12-21 22:15:03,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:15:03,631 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2020-12-21 22:15:03,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:15:03,632 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-12-21 22:15:03,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:15:03,633 INFO L225 Difference]: With dead ends: 42 [2020-12-21 22:15:03,633 INFO L226 Difference]: Without dead ends: 29 [2020-12-21 22:15:03,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:15:03,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-21 22:15:03,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 21. [2020-12-21 22:15:03,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-21 22:15:03,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-12-21 22:15:03,640 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 16 [2020-12-21 22:15:03,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:15:03,640 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-12-21 22:15:03,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:15:03,641 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-12-21 22:15:03,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-21 22:15:03,641 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:15:03,641 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:15:03,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-21 22:15:03,642 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:15:03,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:15:03,643 INFO L82 PathProgramCache]: Analyzing trace with hash -2129460565, now seen corresponding path program 1 times [2020-12-21 22:15:03,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:15:03,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020098939] [2020-12-21 22:15:03,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:15:03,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:15:03,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 22:15:03,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020098939] [2020-12-21 22:15:03,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:15:03,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 22:15:03,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536226547] [2020-12-21 22:15:03,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:15:03,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:15:03,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:15:03,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:15:03,778 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 4 states. [2020-12-21 22:15:03,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:15:03,852 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2020-12-21 22:15:03,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:15:03,853 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-12-21 22:15:03,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:15:03,854 INFO L225 Difference]: With dead ends: 32 [2020-12-21 22:15:03,854 INFO L226 Difference]: Without dead ends: 30 [2020-12-21 22:15:03,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:15:03,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-21 22:15:03,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2020-12-21 22:15:03,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-21 22:15:03,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-12-21 22:15:03,863 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 16 [2020-12-21 22:15:03,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:15:03,864 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-12-21 22:15:03,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:15:03,864 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-12-21 22:15:03,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-21 22:15:03,865 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:15:03,865 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:15:03,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-21 22:15:03,866 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:15:03,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:15:03,866 INFO L82 PathProgramCache]: Analyzing trace with hash -2129520147, now seen corresponding path program 1 times [2020-12-21 22:15:03,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:15:03,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061253862] [2020-12-21 22:15:03,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:15:03,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:15:03,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 22:15:03,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061253862] [2020-12-21 22:15:03,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:15:03,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-21 22:15:03,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395501871] [2020-12-21 22:15:03,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:15:03,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:15:03,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:15:03,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:15:03,971 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 5 states. [2020-12-21 22:15:04,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:15:04,085 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2020-12-21 22:15:04,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 22:15:04,086 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-12-21 22:15:04,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:15:04,087 INFO L225 Difference]: With dead ends: 37 [2020-12-21 22:15:04,087 INFO L226 Difference]: Without dead ends: 35 [2020-12-21 22:15:04,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:15:04,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-21 22:15:04,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2020-12-21 22:15:04,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-21 22:15:04,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2020-12-21 22:15:04,096 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 16 [2020-12-21 22:15:04,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:15:04,096 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-12-21 22:15:04,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:15:04,097 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2020-12-21 22:15:04,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-21 22:15:04,098 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:15:04,098 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:15:04,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-21 22:15:04,098 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:15:04,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:15:04,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1393431485, now seen corresponding path program 1 times [2020-12-21 22:15:04,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:15:04,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488784109] [2020-12-21 22:15:04,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:15:04,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:15:04,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:15:04,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488784109] [2020-12-21 22:15:04,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023249035] [2020-12-21 22:15:04,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:15:04,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:15:04,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:15:04,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:15:04,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:15:04,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:15:04,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-21 22:15:04,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311623529] [2020-12-21 22:15:04,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:15:04,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:15:04,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:15:04,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:15:04,478 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 7 states. [2020-12-21 22:15:04,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:15:04,588 INFO L93 Difference]: Finished difference Result 83 states and 101 transitions. [2020-12-21 22:15:04,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:15:04,589 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-12-21 22:15:04,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:15:04,590 INFO L225 Difference]: With dead ends: 83 [2020-12-21 22:15:04,590 INFO L226 Difference]: Without dead ends: 60 [2020-12-21 22:15:04,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:15:04,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-21 22:15:04,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 34. [2020-12-21 22:15:04,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-21 22:15:04,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2020-12-21 22:15:04,599 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 21 [2020-12-21 22:15:04,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:15:04,599 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2020-12-21 22:15:04,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:15:04,599 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2020-12-21 22:15:04,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-21 22:15:04,600 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:15:04,600 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:15:04,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-21 22:15:04,816 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:15:04,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:15:04,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1589095526, now seen corresponding path program 1 times [2020-12-21 22:15:04,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:15:04,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477737679] [2020-12-21 22:15:04,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:15:04,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:15:04,940 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:15:04,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477737679] [2020-12-21 22:15:04,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878861104] [2020-12-21 22:15:04,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:15:05,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:15:05,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 22:15:05,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:15:05,247 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:15:05,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:15:05,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2020-12-21 22:15:05,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151801321] [2020-12-21 22:15:05,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 22:15:05,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:15:05,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 22:15:05,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:15:05,251 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 10 states. [2020-12-21 22:15:05,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:15:05,647 INFO L93 Difference]: Finished difference Result 108 states and 131 transitions. [2020-12-21 22:15:05,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 22:15:05,648 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-12-21 22:15:05,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:15:05,649 INFO L225 Difference]: With dead ends: 108 [2020-12-21 22:15:05,649 INFO L226 Difference]: Without dead ends: 85 [2020-12-21 22:15:05,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-12-21 22:15:05,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-21 22:15:05,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 39. [2020-12-21 22:15:05,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-21 22:15:05,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2020-12-21 22:15:05,658 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 26 [2020-12-21 22:15:05,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:15:05,658 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2020-12-21 22:15:05,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 22:15:05,659 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2020-12-21 22:15:05,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-21 22:15:05,660 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:15:05,660 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:15:05,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:15:05,875 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:15:05,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:15:05,876 INFO L82 PathProgramCache]: Analyzing trace with hash -442192347, now seen corresponding path program 2 times [2020-12-21 22:15:05,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:15:05,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712231119] [2020-12-21 22:15:05,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:15:05,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:15:06,109 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-21 22:15:06,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712231119] [2020-12-21 22:15:06,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067586916] [2020-12-21 22:15:06,110 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:15:06,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:15:06,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:15:06,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:15:06,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:15:06,378 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:15:06,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:15:06,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-12-21 22:15:06,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574480302] [2020-12-21 22:15:06,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 22:15:06,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:15:06,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 22:15:06,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-12-21 22:15:06,381 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 12 states. [2020-12-21 22:15:07,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:15:07,190 INFO L93 Difference]: Finished difference Result 143 states and 177 transitions. [2020-12-21 22:15:07,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 22:15:07,191 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-12-21 22:15:07,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:15:07,194 INFO L225 Difference]: With dead ends: 143 [2020-12-21 22:15:07,194 INFO L226 Difference]: Without dead ends: 120 [2020-12-21 22:15:07,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=170, Invalid=292, Unknown=0, NotChecked=0, Total=462 [2020-12-21 22:15:07,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-21 22:15:07,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 56. [2020-12-21 22:15:07,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-21 22:15:07,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2020-12-21 22:15:07,205 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 31 [2020-12-21 22:15:07,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:15:07,206 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2020-12-21 22:15:07,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 22:15:07,206 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2020-12-21 22:15:07,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-21 22:15:07,207 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:15:07,207 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:15:07,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:15:07,421 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:15:07,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:15:07,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1071498680, now seen corresponding path program 2 times [2020-12-21 22:15:07,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:15:07,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145330057] [2020-12-21 22:15:07,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:15:07,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:15:07,518 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:15:07,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145330057] [2020-12-21 22:15:07,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121971047] [2020-12-21 22:15:07,519 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:15:07,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:15:07,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:15:07,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 22:15:07,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:15:07,717 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:15:07,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:15:07,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-12-21 22:15:07,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363648206] [2020-12-21 22:15:07,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 22:15:07,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:15:07,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 22:15:07,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:15:07,720 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand 13 states. [2020-12-21 22:15:07,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:15:07,854 INFO L93 Difference]: Finished difference Result 207 states and 247 transitions. [2020-12-21 22:15:07,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 22:15:07,855 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-12-21 22:15:07,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:15:07,857 INFO L225 Difference]: With dead ends: 207 [2020-12-21 22:15:07,857 INFO L226 Difference]: Without dead ends: 164 [2020-12-21 22:15:07,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:15:07,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-12-21 22:15:07,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 56. [2020-12-21 22:15:07,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-21 22:15:07,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2020-12-21 22:15:07,867 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 36 [2020-12-21 22:15:07,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:15:07,867 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2020-12-21 22:15:07,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 22:15:07,868 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2020-12-21 22:15:07,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-21 22:15:07,869 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:15:07,869 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:15:08,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:15:08,084 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:15:08,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:15:08,085 INFO L82 PathProgramCache]: Analyzing trace with hash 4107907, now seen corresponding path program 3 times [2020-12-21 22:15:08,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:15:08,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570627591] [2020-12-21 22:15:08,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:15:08,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:15:08,223 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:15:08,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570627591] [2020-12-21 22:15:08,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838027454] [2020-12-21 22:15:08,224 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:15:08,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 22:15:08,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:15:08,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 22:15:08,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:15:08,413 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-21 22:15:08,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:15:08,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2020-12-21 22:15:08,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668790170] [2020-12-21 22:15:08,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 22:15:08,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:15:08,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 22:15:08,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-12-21 22:15:08,416 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand 12 states. [2020-12-21 22:15:09,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:15:09,218 INFO L93 Difference]: Finished difference Result 367 states and 435 transitions. [2020-12-21 22:15:09,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-21 22:15:09,218 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-12-21 22:15:09,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:15:09,221 INFO L225 Difference]: With dead ends: 367 [2020-12-21 22:15:09,221 INFO L226 Difference]: Without dead ends: 349 [2020-12-21 22:15:09,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=1015, Unknown=0, NotChecked=0, Total=1482 [2020-12-21 22:15:09,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-12-21 22:15:09,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 76. [2020-12-21 22:15:09,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-21 22:15:09,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 91 transitions. [2020-12-21 22:15:09,237 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 91 transitions. Word has length 41 [2020-12-21 22:15:09,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:15:09,238 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 91 transitions. [2020-12-21 22:15:09,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 22:15:09,238 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 91 transitions. [2020-12-21 22:15:09,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-21 22:15:09,240 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:15:09,240 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:15:09,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-21 22:15:09,453 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:15:09,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:15:09,454 INFO L82 PathProgramCache]: Analyzing trace with hash 867646876, now seen corresponding path program 1 times [2020-12-21 22:15:09,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:15:09,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619901955] [2020-12-21 22:15:09,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:15:09,476 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:15:09,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1386118736] [2020-12-21 22:15:09,476 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 [2020-12-21 22:15:09,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:15:09,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 22:15:09,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:15:09,726 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:15:09,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619901955] [2020-12-21 22:15:09,727 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:15:09,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386118736] [2020-12-21 22:15:09,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:15:09,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-21 22:15:09,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020207875] [2020-12-21 22:15:09,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 22:15:09,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:15:09,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 22:15:09,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:15:09,729 INFO L87 Difference]: Start difference. First operand 76 states and 91 transitions. Second operand 10 states. [2020-12-21 22:15:09,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:15:09,902 INFO L93 Difference]: Finished difference Result 302 states and 363 transitions. [2020-12-21 22:15:09,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 22:15:09,903 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2020-12-21 22:15:09,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:15:09,905 INFO L225 Difference]: With dead ends: 302 [2020-12-21 22:15:09,905 INFO L226 Difference]: Without dead ends: 252 [2020-12-21 22:15:09,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:15:09,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-12-21 22:15:09,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 86. [2020-12-21 22:15:09,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-21 22:15:09,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 103 transitions. [2020-12-21 22:15:09,931 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 103 transitions. Word has length 46 [2020-12-21 22:15:09,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:15:09,931 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 103 transitions. [2020-12-21 22:15:09,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 22:15:09,931 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 103 transitions. [2020-12-21 22:15:09,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-21 22:15:09,935 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:15:09,935 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:15:10,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:15:10,136 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:15:10,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:15:10,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1544530789, now seen corresponding path program 3 times [2020-12-21 22:15:10,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:15:10,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200926484] [2020-12-21 22:15:10,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:15:10,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:15:10,359 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 2 proven. 105 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-21 22:15:10,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200926484] [2020-12-21 22:15:10,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392345780] [2020-12-21 22:15:10,365 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:15:10,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-21 22:15:10,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:15:10,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 22:15:10,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:15:10,716 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-21 22:15:10,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:15:10,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2020-12-21 22:15:10,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813144363] [2020-12-21 22:15:10,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-21 22:15:10,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:15:10,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-21 22:15:10,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-12-21 22:15:10,719 INFO L87 Difference]: Start difference. First operand 86 states and 103 transitions. Second operand 19 states. [2020-12-21 22:15:14,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:15:14,447 INFO L93 Difference]: Finished difference Result 366 states and 450 transitions. [2020-12-21 22:15:14,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-12-21 22:15:14,448 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 51 [2020-12-21 22:15:14,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:15:14,450 INFO L225 Difference]: With dead ends: 366 [2020-12-21 22:15:14,451 INFO L226 Difference]: Without dead ends: 348 [2020-12-21 22:15:14,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2227 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1648, Invalid=4514, Unknown=0, NotChecked=0, Total=6162 [2020-12-21 22:15:14,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-12-21 22:15:14,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 123. [2020-12-21 22:15:14,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-12-21 22:15:14,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 154 transitions. [2020-12-21 22:15:14,468 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 154 transitions. Word has length 51 [2020-12-21 22:15:14,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:15:14,468 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 154 transitions. [2020-12-21 22:15:14,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-21 22:15:14,468 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 154 transitions. [2020-12-21 22:15:14,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-21 22:15:14,470 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:15:14,470 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 6, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:15:14,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:15:14,685 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:15:14,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:15:14,686 INFO L82 PathProgramCache]: Analyzing trace with hash 76873861, now seen corresponding path program 2 times [2020-12-21 22:15:14,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:15:14,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904888428] [2020-12-21 22:15:14,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:15:14,708 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:15:14,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2086043431] [2020-12-21 22:15:14,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:15:14,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:15:14,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:15:14,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:15:14,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:15:14,859 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-12-21 22:15:14,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904888428] [2020-12-21 22:15:14,860 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:15:14,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086043431] [2020-12-21 22:15:14,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:15:14,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 22:15:14,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563631691] [2020-12-21 22:15:14,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:15:14,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:15:14,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:15:14,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:15:14,862 INFO L87 Difference]: Start difference. First operand 123 states and 154 transitions. Second operand 4 states. [2020-12-21 22:15:14,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:15:14,890 INFO L93 Difference]: Finished difference Result 228 states and 289 transitions. [2020-12-21 22:15:14,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:15:14,891 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2020-12-21 22:15:14,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:15:14,892 INFO L225 Difference]: With dead ends: 228 [2020-12-21 22:15:14,892 INFO L226 Difference]: Without dead ends: 141 [2020-12-21 22:15:14,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:15:14,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-12-21 22:15:14,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 115. [2020-12-21 22:15:14,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-21 22:15:14,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 141 transitions. [2020-12-21 22:15:14,904 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 141 transitions. Word has length 61 [2020-12-21 22:15:14,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:15:14,904 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 141 transitions. [2020-12-21 22:15:14,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:15:14,904 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 141 transitions. [2020-12-21 22:15:14,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-21 22:15:14,905 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:15:14,905 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:15:15,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-21 22:15:15,119 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:15:15,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:15:15,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1073413637, now seen corresponding path program 4 times [2020-12-21 22:15:15,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:15:15,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680317126] [2020-12-21 22:15:15,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:15:15,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:15:15,435 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 2 proven. 182 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-21 22:15:15,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680317126] [2020-12-21 22:15:15,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648905883] [2020-12-21 22:15:15,436 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:15:15,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:15:15,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:15:15,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:15:15,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:15:15,628 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2020-12-21 22:15:15,629 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:15:15,636 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:15:15,637 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:15:15,638 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-21 22:15:15,689 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2020-12-21 22:15:15,691 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:15:15,696 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:15:15,698 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:15:15,700 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:28, output treesize:3 [2020-12-21 22:15:15,748 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 100 proven. 2 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-21 22:15:15,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:15:15,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 19 [2020-12-21 22:15:15,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835792405] [2020-12-21 22:15:15,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-21 22:15:15,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:15:15,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-21 22:15:15,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-12-21 22:15:15,751 INFO L87 Difference]: Start difference. First operand 115 states and 141 transitions. Second operand 19 states. [2020-12-21 22:15:16,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:15:16,867 INFO L93 Difference]: Finished difference Result 270 states and 323 transitions. [2020-12-21 22:15:16,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-21 22:15:16,868 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 61 [2020-12-21 22:15:16,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:15:16,870 INFO L225 Difference]: With dead ends: 270 [2020-12-21 22:15:16,870 INFO L226 Difference]: Without dead ends: 220 [2020-12-21 22:15:16,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=480, Invalid=1326, Unknown=0, NotChecked=0, Total=1806 [2020-12-21 22:15:16,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-12-21 22:15:16,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 105. [2020-12-21 22:15:16,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-12-21 22:15:16,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 120 transitions. [2020-12-21 22:15:16,881 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 120 transitions. Word has length 61 [2020-12-21 22:15:16,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:15:16,882 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 120 transitions. [2020-12-21 22:15:16,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-21 22:15:16,882 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 120 transitions. [2020-12-21 22:15:16,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-21 22:15:16,883 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:15:16,883 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:15:17,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:15:17,098 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:15:17,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:15:17,099 INFO L82 PathProgramCache]: Analyzing trace with hash 2024298556, now seen corresponding path program 3 times [2020-12-21 22:15:17,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:15:17,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792242824] [2020-12-21 22:15:17,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:15:17,126 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:15:17,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1489629237] [2020-12-21 22:15:17,128 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:15:17,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-21 22:15:17,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:15:17,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 22:15:17,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:15:17,327 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:15:17,521 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 185 proven. 70 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-21 22:15:17,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792242824] [2020-12-21 22:15:17,523 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:15:17,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489629237] [2020-12-21 22:15:17,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:15:17,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-21 22:15:17,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102398865] [2020-12-21 22:15:17,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 22:15:17,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:15:17,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 22:15:17,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:15:17,528 INFO L87 Difference]: Start difference. First operand 105 states and 120 transitions. Second operand 11 states. [2020-12-21 22:15:18,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:15:18,036 INFO L93 Difference]: Finished difference Result 272 states and 317 transitions. [2020-12-21 22:15:18,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-21 22:15:18,037 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 76 [2020-12-21 22:15:18,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:15:18,041 INFO L225 Difference]: With dead ends: 272 [2020-12-21 22:15:18,041 INFO L226 Difference]: Without dead ends: 254 [2020-12-21 22:15:18,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=180, Invalid=282, Unknown=0, NotChecked=0, Total=462 [2020-12-21 22:15:18,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-12-21 22:15:18,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 115. [2020-12-21 22:15:18,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-21 22:15:18,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 132 transitions. [2020-12-21 22:15:18,057 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 132 transitions. Word has length 76 [2020-12-21 22:15:18,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:15:18,057 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 132 transitions. [2020-12-21 22:15:18,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 22:15:18,058 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 132 transitions. [2020-12-21 22:15:18,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-21 22:15:18,058 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:15:18,059 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:15:18,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-21 22:15:18,273 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:15:18,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:15:18,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1166078337, now seen corresponding path program 4 times [2020-12-21 22:15:18,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:15:18,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007748677] [2020-12-21 22:15:18,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:15:18,298 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:15:18,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [862971129] [2020-12-21 22:15:18,298 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:15:18,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:15:18,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:15:18,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 22:15:18,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:15:18,765 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:15:18,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007748677] [2020-12-21 22:15:18,765 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:15:18,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862971129] [2020-12-21 22:15:18,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:15:18,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-12-21 22:15:18,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483833160] [2020-12-21 22:15:18,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-21 22:15:18,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:15:18,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-21 22:15:18,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 22:15:18,767 INFO L87 Difference]: Start difference. First operand 115 states and 132 transitions. Second operand 17 states. [2020-12-21 22:15:19,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:15:19,096 INFO L93 Difference]: Finished difference Result 459 states and 539 transitions. [2020-12-21 22:15:19,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-21 22:15:19,097 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 81 [2020-12-21 22:15:19,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:15:19,099 INFO L225 Difference]: With dead ends: 459 [2020-12-21 22:15:19,100 INFO L226 Difference]: Without dead ends: 380 [2020-12-21 22:15:19,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 22:15:19,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-12-21 22:15:19,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 150. [2020-12-21 22:15:19,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-12-21 22:15:19,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 167 transitions. [2020-12-21 22:15:19,115 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 167 transitions. Word has length 81 [2020-12-21 22:15:19,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:15:19,115 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 167 transitions. [2020-12-21 22:15:19,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-21 22:15:19,116 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 167 transitions. [2020-12-21 22:15:19,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-21 22:15:19,117 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:15:19,117 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:15:19,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-21 22:15:19,332 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:15:19,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:15:19,333 INFO L82 PathProgramCache]: Analyzing trace with hash -350545868, now seen corresponding path program 5 times [2020-12-21 22:15:19,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:15:19,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494582313] [2020-12-21 22:15:19,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:15:19,365 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:15:19,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [434076316] [2020-12-21 22:15:19,373 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:15:19,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2020-12-21 22:15:19,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:15:19,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-21 22:15:20,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:15:20,683 INFO L134 CoverageAnalysis]: Checked inductivity of 974 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:15:20,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494582313] [2020-12-21 22:15:20,683 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:15:20,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434076316] [2020-12-21 22:15:20,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:15:20,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-12-21 22:15:20,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195202780] [2020-12-21 22:15:20,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-21 22:15:20,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:15:20,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-21 22:15:20,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-21 22:15:20,686 INFO L87 Difference]: Start difference. First operand 150 states and 167 transitions. Second operand 24 states. [2020-12-21 22:15:21,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:15:21,186 INFO L93 Difference]: Finished difference Result 613 states and 714 transitions. [2020-12-21 22:15:21,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-21 22:15:21,187 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 116 [2020-12-21 22:15:21,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:15:21,190 INFO L225 Difference]: With dead ends: 613 [2020-12-21 22:15:21,191 INFO L226 Difference]: Without dead ends: 534 [2020-12-21 22:15:21,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-21 22:15:21,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2020-12-21 22:15:21,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 185. [2020-12-21 22:15:21,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-12-21 22:15:21,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 202 transitions. [2020-12-21 22:15:21,210 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 202 transitions. Word has length 116 [2020-12-21 22:15:21,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:15:21,211 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 202 transitions. [2020-12-21 22:15:21,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-21 22:15:21,211 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 202 transitions. [2020-12-21 22:15:21,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-12-21 22:15:21,213 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:15:21,213 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:15:21,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-21 22:15:21,429 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:15:21,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:15:21,430 INFO L82 PathProgramCache]: Analyzing trace with hash 2125285983, now seen corresponding path program 6 times [2020-12-21 22:15:21,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:15:21,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558732399] [2020-12-21 22:15:21,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:15:21,461 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:15:21,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [48102492] [2020-12-21 22:15:21,462 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:15:22,370 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-21 22:15:22,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:15:22,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 22:15:22,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:15:22,491 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:15:22,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1786 backedges. 693 proven. 99 refuted. 0 times theorem prover too weak. 994 trivial. 0 not checked. [2020-12-21 22:15:22,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558732399] [2020-12-21 22:15:22,743 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:15:22,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48102492] [2020-12-21 22:15:22,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:15:22,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-21 22:15:22,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210818069] [2020-12-21 22:15:22,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 22:15:22,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:15:22,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 22:15:22,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2020-12-21 22:15:22,745 INFO L87 Difference]: Start difference. First operand 185 states and 202 transitions. Second operand 12 states. [2020-12-21 22:15:23,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:15:23,387 INFO L93 Difference]: Finished difference Result 377 states and 428 transitions. [2020-12-21 22:15:23,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-21 22:15:23,388 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 151 [2020-12-21 22:15:23,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:15:23,390 INFO L225 Difference]: With dead ends: 377 [2020-12-21 22:15:23,391 INFO L226 Difference]: Without dead ends: 359 [2020-12-21 22:15:23,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=230, Invalid=370, Unknown=0, NotChecked=0, Total=600 [2020-12-21 22:15:23,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-12-21 22:15:23,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 195. [2020-12-21 22:15:23,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-12-21 22:15:23,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 214 transitions. [2020-12-21 22:15:23,406 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 214 transitions. Word has length 151 [2020-12-21 22:15:23,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:15:23,407 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 214 transitions. [2020-12-21 22:15:23,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 22:15:23,407 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 214 transitions. [2020-12-21 22:15:23,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-12-21 22:15:23,409 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:15:23,409 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:15:23,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-21 22:15:23,623 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:15:23,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:15:23,624 INFO L82 PathProgramCache]: Analyzing trace with hash 125499964, now seen corresponding path program 7 times [2020-12-21 22:15:23,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:15:23,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649236957] [2020-12-21 22:15:23,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:15:23,650 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:15:23,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [398889788] [2020-12-21 22:15:23,651 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:15:23,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:15:23,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-21 22:15:23,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:15:24,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:15:24,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649236957] [2020-12-21 22:15:24,825 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:15:24,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398889788] [2020-12-21 22:15:24,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:15:24,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-12-21 22:15:24,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459546812] [2020-12-21 22:15:24,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-21 22:15:24,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:15:24,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-21 22:15:24,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-21 22:15:24,828 INFO L87 Difference]: Start difference. First operand 195 states and 214 transitions. Second operand 32 states. [2020-12-21 22:15:25,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:15:25,570 INFO L93 Difference]: Finished difference Result 809 states and 939 transitions. [2020-12-21 22:15:25,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-21 22:15:25,571 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 156 [2020-12-21 22:15:25,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:15:25,575 INFO L225 Difference]: With dead ends: 809 [2020-12-21 22:15:25,575 INFO L226 Difference]: Without dead ends: 720 [2020-12-21 22:15:25,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-21 22:15:25,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2020-12-21 22:15:25,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 235. [2020-12-21 22:15:25,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-12-21 22:15:25,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 254 transitions. [2020-12-21 22:15:25,599 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 254 transitions. Word has length 156 [2020-12-21 22:15:25,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:15:25,599 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 254 transitions. [2020-12-21 22:15:25,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-21 22:15:25,599 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 254 transitions. [2020-12-21 22:15:25,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-12-21 22:15:25,602 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:15:25,602 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 35, 35, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:15:25,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:15:25,816 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:15:25,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:15:25,816 INFO L82 PathProgramCache]: Analyzing trace with hash 802096572, now seen corresponding path program 8 times [2020-12-21 22:15:25,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:15:25,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951777493] [2020-12-21 22:15:25,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:15:25,845 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:15:25,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [47986277] [2020-12-21 22:15:25,846 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:15:25,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:15:25,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:15:25,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-21 22:15:25,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:15:27,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3190 backedges. 0 proven. 3186 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:15:27,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951777493] [2020-12-21 22:15:27,506 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:15:27,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47986277] [2020-12-21 22:15:27,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:15:27,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-12-21 22:15:27,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780496990] [2020-12-21 22:15:27,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-21 22:15:27,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:15:27,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-21 22:15:27,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-21 22:15:27,510 INFO L87 Difference]: Start difference. First operand 235 states and 254 transitions. Second operand 40 states. [2020-12-21 22:15:28,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:15:28,475 INFO L93 Difference]: Finished difference Result 985 states and 1139 transitions. [2020-12-21 22:15:28,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-21 22:15:28,476 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 196 [2020-12-21 22:15:28,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:15:28,482 INFO L225 Difference]: With dead ends: 985 [2020-12-21 22:15:28,483 INFO L226 Difference]: Without dead ends: 896 [2020-12-21 22:15:28,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-21 22:15:28,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2020-12-21 22:15:28,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 275. [2020-12-21 22:15:28,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-12-21 22:15:28,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 294 transitions. [2020-12-21 22:15:28,514 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 294 transitions. Word has length 196 [2020-12-21 22:15:28,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:15:28,514 INFO L481 AbstractCegarLoop]: Abstraction has 275 states and 294 transitions. [2020-12-21 22:15:28,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-21 22:15:28,514 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 294 transitions. [2020-12-21 22:15:28,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-12-21 22:15:28,518 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:15:28,518 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 43, 43, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:15:28,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:15:28,733 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:15:28,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:15:28,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1508798148, now seen corresponding path program 9 times [2020-12-21 22:15:28,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:15:28,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272022223] [2020-12-21 22:15:28,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:15:28,768 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:15:28,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [857756390] [2020-12-21 22:15:28,769 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:15:28,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-12-21 22:15:28,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:15:28,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 22:15:28,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:15:29,122 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:15:29,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4778 backedges. 1419 proven. 133 refuted. 0 times theorem prover too weak. 3226 trivial. 0 not checked. [2020-12-21 22:15:29,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272022223] [2020-12-21 22:15:29,477 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:15:29,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857756390] [2020-12-21 22:15:29,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:15:29,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-21 22:15:29,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95160101] [2020-12-21 22:15:29,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 22:15:29,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:15:29,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 22:15:29,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:15:29,479 INFO L87 Difference]: Start difference. First operand 275 states and 294 transitions. Second operand 13 states. [2020-12-21 22:15:30,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:15:30,194 INFO L93 Difference]: Finished difference Result 492 states and 549 transitions. [2020-12-21 22:15:30,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-21 22:15:30,195 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 236 [2020-12-21 22:15:30,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:15:30,198 INFO L225 Difference]: With dead ends: 492 [2020-12-21 22:15:30,199 INFO L226 Difference]: Without dead ends: 474 [2020-12-21 22:15:30,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=286, Invalid=470, Unknown=0, NotChecked=0, Total=756 [2020-12-21 22:15:30,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-12-21 22:15:30,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 285. [2020-12-21 22:15:30,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2020-12-21 22:15:30,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 306 transitions. [2020-12-21 22:15:30,224 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 306 transitions. Word has length 236 [2020-12-21 22:15:30,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:15:30,225 INFO L481 AbstractCegarLoop]: Abstraction has 285 states and 306 transitions. [2020-12-21 22:15:30,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 22:15:30,225 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 306 transitions. [2020-12-21 22:15:30,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-12-21 22:15:30,228 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:15:30,229 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 44, 44, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:15:30,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:15:30,443 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:15:30,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:15:30,444 INFO L82 PathProgramCache]: Analyzing trace with hash -890145409, now seen corresponding path program 10 times [2020-12-21 22:15:30,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:15:30,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307387681] [2020-12-21 22:15:30,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:15:30,476 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:15:30,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1971490085] [2020-12-21 22:15:30,476 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:15:32,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:15:32,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:15:32,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-21 22:15:32,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:15:34,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4999 backedges. 0 proven. 4995 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:15:34,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307387681] [2020-12-21 22:15:34,991 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:15:34,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971490085] [2020-12-21 22:15:34,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:15:34,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-12-21 22:15:34,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993256555] [2020-12-21 22:15:34,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-21 22:15:34,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:15:34,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-21 22:15:34,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-21 22:15:34,995 INFO L87 Difference]: Start difference. First operand 285 states and 306 transitions. Second operand 49 states. [2020-12-21 22:15:36,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:15:36,265 INFO L93 Difference]: Finished difference Result 1203 states and 1389 transitions. [2020-12-21 22:15:36,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-21 22:15:36,268 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 241 [2020-12-21 22:15:36,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:15:36,273 INFO L225 Difference]: With dead ends: 1203 [2020-12-21 22:15:36,273 INFO L226 Difference]: Without dead ends: 1104 [2020-12-21 22:15:36,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-21 22:15:36,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2020-12-21 22:15:36,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 330. [2020-12-21 22:15:36,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-12-21 22:15:36,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 351 transitions. [2020-12-21 22:15:36,304 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 351 transitions. Word has length 241 [2020-12-21 22:15:36,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:15:36,304 INFO L481 AbstractCegarLoop]: Abstraction has 330 states and 351 transitions. [2020-12-21 22:15:36,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-21 22:15:36,304 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 351 transitions. [2020-12-21 22:15:36,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-12-21 22:15:36,308 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:15:36,308 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 54, 53, 53, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:15:36,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-21 22:15:36,522 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:15:36,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:15:36,523 INFO L82 PathProgramCache]: Analyzing trace with hash -39345644, now seen corresponding path program 11 times [2020-12-21 22:15:36,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:15:36,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75050685] [2020-12-21 22:15:36,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:15:36,559 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:15:36,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1701870597] [2020-12-21 22:15:36,560 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:18:31,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2020-12-21 22:18:31,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:18:31,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-21 22:18:31,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:18:34,503 INFO L134 CoverageAnalysis]: Checked inductivity of 7213 backedges. 0 proven. 7209 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:18:34,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75050685] [2020-12-21 22:18:34,503 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:18:34,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701870597] [2020-12-21 22:18:34,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:18:34,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-12-21 22:18:34,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972951528] [2020-12-21 22:18:34,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-12-21 22:18:34,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:18:34,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-12-21 22:18:34,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-21 22:18:34,507 INFO L87 Difference]: Start difference. First operand 330 states and 351 transitions. Second operand 58 states. [2020-12-21 22:18:36,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:18:36,275 INFO L93 Difference]: Finished difference Result 1401 states and 1614 transitions. [2020-12-21 22:18:36,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-21 22:18:36,275 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 286 [2020-12-21 22:18:36,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:18:36,281 INFO L225 Difference]: With dead ends: 1401 [2020-12-21 22:18:36,282 INFO L226 Difference]: Without dead ends: 1302 [2020-12-21 22:18:36,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-21 22:18:36,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2020-12-21 22:18:36,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 375. [2020-12-21 22:18:36,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 375 states. [2020-12-21 22:18:36,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 396 transitions. [2020-12-21 22:18:36,317 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 396 transitions. Word has length 286 [2020-12-21 22:18:36,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:18:36,317 INFO L481 AbstractCegarLoop]: Abstraction has 375 states and 396 transitions. [2020-12-21 22:18:36,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-12-21 22:18:36,318 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 396 transitions. [2020-12-21 22:18:36,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-12-21 22:18:36,323 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:18:36,323 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 63, 62, 62, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:18:36,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-21 22:18:36,539 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:18:36,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:18:36,540 INFO L82 PathProgramCache]: Analyzing trace with hash 966681503, now seen corresponding path program 12 times [2020-12-21 22:18:36,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:18:36,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716344505] [2020-12-21 22:18:36,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:18:36,582 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:18:36,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2070298564] [2020-12-21 22:18:36,583 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:18:37,820 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2020-12-21 22:18:37,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:18:37,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 22:18:37,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:18:38,121 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:18:38,620 INFO L134 CoverageAnalysis]: Checked inductivity of 9832 backedges. 2393 proven. 172 refuted. 0 times theorem prover too weak. 7267 trivial. 0 not checked. [2020-12-21 22:18:38,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716344505] [2020-12-21 22:18:38,621 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:18:38,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070298564] [2020-12-21 22:18:38,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:18:38,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-21 22:18:38,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410364228] [2020-12-21 22:18:38,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 22:18:38,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:18:38,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 22:18:38,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2020-12-21 22:18:38,624 INFO L87 Difference]: Start difference. First operand 375 states and 396 transitions. Second operand 14 states. [2020-12-21 22:18:39,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:18:39,465 INFO L93 Difference]: Finished difference Result 617 states and 680 transitions. [2020-12-21 22:18:39,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-21 22:18:39,466 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 331 [2020-12-21 22:18:39,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:18:39,469 INFO L225 Difference]: With dead ends: 617 [2020-12-21 22:18:39,469 INFO L226 Difference]: Without dead ends: 599 [2020-12-21 22:18:39,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=348, Invalid=582, Unknown=0, NotChecked=0, Total=930 [2020-12-21 22:18:39,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2020-12-21 22:18:39,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 385. [2020-12-21 22:18:39,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2020-12-21 22:18:39,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 408 transitions. [2020-12-21 22:18:39,500 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 408 transitions. Word has length 331 [2020-12-21 22:18:39,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:18:39,501 INFO L481 AbstractCegarLoop]: Abstraction has 385 states and 408 transitions. [2020-12-21 22:18:39,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 22:18:39,501 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 408 transitions. [2020-12-21 22:18:39,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-12-21 22:18:39,503 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:18:39,503 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 64, 63, 63, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:18:39,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-21 22:18:39,718 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:18:39,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:18:39,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1853380356, now seen corresponding path program 13 times [2020-12-21 22:18:39,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:18:39,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312694316] [2020-12-21 22:18:39,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:18:39,759 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:18:39,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1932938602] [2020-12-21 22:18:39,760 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:18:39,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:18:39,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-21 22:18:39,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:18:44,088 INFO L134 CoverageAnalysis]: Checked inductivity of 10148 backedges. 0 proven. 10144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:18:44,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312694316] [2020-12-21 22:18:44,088 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:18:44,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932938602] [2020-12-21 22:18:44,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:18:44,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-12-21 22:18:44,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746186291] [2020-12-21 22:18:44,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-21 22:18:44,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:18:44,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-21 22:18:44,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-12-21 22:18:44,092 INFO L87 Difference]: Start difference. First operand 385 states and 408 transitions. Second operand 68 states. [2020-12-21 22:18:46,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:18:46,488 INFO L93 Difference]: Finished difference Result 1641 states and 1889 transitions. [2020-12-21 22:18:46,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-21 22:18:46,489 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 336 [2020-12-21 22:18:46,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:18:46,496 INFO L225 Difference]: With dead ends: 1641 [2020-12-21 22:18:46,497 INFO L226 Difference]: Without dead ends: 1532 [2020-12-21 22:18:46,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-12-21 22:18:46,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1532 states. [2020-12-21 22:18:46,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1532 to 435. [2020-12-21 22:18:46,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435 states. [2020-12-21 22:18:46,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 458 transitions. [2020-12-21 22:18:46,547 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 458 transitions. Word has length 336 [2020-12-21 22:18:46,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:18:46,547 INFO L481 AbstractCegarLoop]: Abstraction has 435 states and 458 transitions. [2020-12-21 22:18:46,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-12-21 22:18:46,548 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 458 transitions. [2020-12-21 22:18:46,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2020-12-21 22:18:46,550 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:18:46,550 INFO L422 BasicCegarLoop]: trace histogram [74, 74, 74, 73, 73, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:18:46,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-21 22:18:46,764 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:18:46,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:18:46,765 INFO L82 PathProgramCache]: Analyzing trace with hash 608865116, now seen corresponding path program 14 times [2020-12-21 22:18:46,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:18:46,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124923874] [2020-12-21 22:18:46,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:18:46,808 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:18:46,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [432118732] [2020-12-21 22:18:46,808 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:18:47,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:18:47,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:18:47,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 77 conjunts are in the unsatisfiable core [2020-12-21 22:18:47,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:18:52,664 INFO L134 CoverageAnalysis]: Checked inductivity of 13583 backedges. 0 proven. 13579 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:18:52,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124923874] [2020-12-21 22:18:52,664 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:18:52,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432118732] [2020-12-21 22:18:52,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:18:52,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2020-12-21 22:18:52,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977676416] [2020-12-21 22:18:52,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-12-21 22:18:52,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:18:52,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-12-21 22:18:52,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-12-21 22:18:52,669 INFO L87 Difference]: Start difference. First operand 435 states and 458 transitions. Second operand 78 states. [2020-12-21 22:18:56,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:18:56,256 INFO L93 Difference]: Finished difference Result 1861 states and 2139 transitions. [2020-12-21 22:18:56,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-12-21 22:18:56,256 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 386 [2020-12-21 22:18:56,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:18:56,263 INFO L225 Difference]: With dead ends: 1861 [2020-12-21 22:18:56,263 INFO L226 Difference]: Without dead ends: 1752 [2020-12-21 22:18:56,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-12-21 22:18:56,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1752 states. [2020-12-21 22:18:56,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1752 to 485. [2020-12-21 22:18:56,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 485 states. [2020-12-21 22:18:56,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 508 transitions. [2020-12-21 22:18:56,311 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 508 transitions. Word has length 386 [2020-12-21 22:18:56,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:18:56,312 INFO L481 AbstractCegarLoop]: Abstraction has 485 states and 508 transitions. [2020-12-21 22:18:56,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-12-21 22:18:56,312 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 508 transitions. [2020-12-21 22:18:56,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2020-12-21 22:18:56,315 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:18:56,315 INFO L422 BasicCegarLoop]: trace histogram [84, 84, 84, 83, 83, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:18:56,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-21 22:18:56,529 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:18:56,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:18:56,529 INFO L82 PathProgramCache]: Analyzing trace with hash -419686980, now seen corresponding path program 15 times [2020-12-21 22:18:56,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:18:56,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420455888] [2020-12-21 22:18:56,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:18:56,574 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:18:56,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [445071314] [2020-12-21 22:18:56,575 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:18:56,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-12-21 22:18:56,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:18:56,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 22:18:56,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:18:57,224 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:18:57,829 INFO L134 CoverageAnalysis]: Checked inductivity of 17518 backedges. 3645 proven. 216 refuted. 0 times theorem prover too weak. 13657 trivial. 0 not checked. [2020-12-21 22:18:57,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420455888] [2020-12-21 22:18:57,829 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:18:57,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445071314] [2020-12-21 22:18:57,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:18:57,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-12-21 22:18:57,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334536067] [2020-12-21 22:18:57,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-21 22:18:57,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:18:57,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-21 22:18:57,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2020-12-21 22:18:57,831 INFO L87 Difference]: Start difference. First operand 485 states and 508 transitions. Second operand 15 states. [2020-12-21 22:18:58,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:18:58,946 INFO L93 Difference]: Finished difference Result 752 states and 821 transitions. [2020-12-21 22:18:58,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-21 22:18:58,947 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 436 [2020-12-21 22:18:58,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:18:58,952 INFO L225 Difference]: With dead ends: 752 [2020-12-21 22:18:58,952 INFO L226 Difference]: Without dead ends: 734 [2020-12-21 22:18:58,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 422 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=416, Invalid=706, Unknown=0, NotChecked=0, Total=1122 [2020-12-21 22:18:58,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2020-12-21 22:18:58,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 495. [2020-12-21 22:18:58,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 495 states. [2020-12-21 22:18:58,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 520 transitions. [2020-12-21 22:18:58,997 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 520 transitions. Word has length 436 [2020-12-21 22:18:58,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:18:58,998 INFO L481 AbstractCegarLoop]: Abstraction has 495 states and 520 transitions. [2020-12-21 22:18:58,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-21 22:18:58,998 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 520 transitions. [2020-12-21 22:18:59,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2020-12-21 22:18:59,001 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:18:59,001 INFO L422 BasicCegarLoop]: trace histogram [85, 85, 85, 84, 84, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:18:59,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:18:59,214 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:18:59,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:18:59,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1503280897, now seen corresponding path program 16 times [2020-12-21 22:18:59,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:18:59,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634977661] [2020-12-21 22:18:59,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:18:59,271 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:18:59,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [10856120] [2020-12-21 22:18:59,272 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true