/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/reducercommutativity/rangesum10.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:56:55,843 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:56:55,846 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:56:55,886 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 21:56:55,887 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 21:56:55,888 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 21:56:55,890 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 21:56:55,893 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 21:56:55,895 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 21:56:55,897 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 21:56:55,898 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 21:56:55,900 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 21:56:55,901 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 21:56:55,902 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 21:56:55,904 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 21:56:55,905 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 21:56:55,914 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 21:56:55,915 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 21:56:55,917 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 21:56:55,919 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 21:56:55,921 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 21:56:55,923 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 21:56:55,925 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 21:56:55,930 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 21:56:55,938 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 21:56:55,948 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-21 21:56:55,949 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-21 21:56:55,951 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-21 21:56:55,952 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-21 21:56:55,956 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-21 21:56:55,956 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-21 21:56:55,957 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-21 21:56:55,957 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-21 21:56:55,958 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 21:56:55,959 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 21:56:55,960 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 21:56:55,961 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:56:56,013 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:56:56,013 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:56:56,017 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:56:56,017 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:56:56,017 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:56:56,017 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:56:56,017 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:56:56,018 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:56:56,018 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:56:56,018 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:56:56,018 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:56:56,018 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:56:56,018 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:56:56,019 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:56:56,019 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:56:56,019 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:56:56,019 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:56:56,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:56:56,020 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:56:56,020 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:56:56,020 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:56:56,020 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:56:56,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:56:56,021 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:56:56,021 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:56:56,021 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:56:56,379 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:56:56,409 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:56:56,413 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:56:56,414 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:56:56,415 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:56:56,416 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/rangesum10.i [2020-12-21 21:56:56,497 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f0321131/7b1883381b0a4da4b6933cb630e9c2f8/FLAGac5c0701f [2020-12-21 21:56:57,074 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:56:57,074 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum10.i [2020-12-21 21:56:57,088 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f0321131/7b1883381b0a4da4b6933cb630e9c2f8/FLAGac5c0701f [2020-12-21 21:56:57,475 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f0321131/7b1883381b0a4da4b6933cb630e9c2f8 [2020-12-21 21:56:57,478 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:56:57,481 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:56:57,484 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:56:57,484 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:56:57,489 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:56:57,490 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:56:57" (1/1) ... [2020-12-21 21:56:57,492 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@409e11b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:57, skipping insertion in model container [2020-12-21 21:56:57,492 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:56:57" (1/1) ... [2020-12-21 21:56:57,503 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:56:57,527 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:56:57,721 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum10.i[1465,1478] [2020-12-21 21:56:57,724 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:56:57,732 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:56:57,782 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum10.i[1465,1478] [2020-12-21 21:56:57,783 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:56:57,805 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:56:57,805 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:57 WrapperNode [2020-12-21 21:56:57,806 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:56:57,807 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:56:57,807 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:56:57,808 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:56:57,816 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:57" (1/1) ... [2020-12-21 21:56:57,839 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:57" (1/1) ... [2020-12-21 21:56:57,883 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:56:57,884 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:56:57,884 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:56:57,886 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:56:57,897 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:57" (1/1) ... [2020-12-21 21:56:57,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:57" (1/1) ... [2020-12-21 21:56:57,911 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:57" (1/1) ... [2020-12-21 21:56:57,911 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:57" (1/1) ... [2020-12-21 21:56:57,937 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:57" (1/1) ... [2020-12-21 21:56:57,947 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:57" (1/1) ... [2020-12-21 21:56:57,956 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:57" (1/1) ... [2020-12-21 21:56:57,961 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:56:57,963 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:56:57,963 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:56:57,965 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:56:57,966 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:57" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:56:58,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:56:58,087 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:56:58,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:56:58,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:56:58,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:56:58,089 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:56:58,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 21:56:58,577 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:56:58,577 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2020-12-21 21:56:58,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:56:58 BoogieIcfgContainer [2020-12-21 21:56:58,582 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:56:58,587 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:56:58,588 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:56:58,595 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:56:58,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:56:57" (1/3) ... [2020-12-21 21:56:58,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6419542e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:56:58, skipping insertion in model container [2020-12-21 21:56:58,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:57" (2/3) ... [2020-12-21 21:56:58,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6419542e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:56:58, skipping insertion in model container [2020-12-21 21:56:58,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:56:58" (3/3) ... [2020-12-21 21:56:58,599 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum10.i [2020-12-21 21:56:58,607 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:56:58,612 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 21:56:58,636 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 21:56:58,665 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:56:58,665 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:56:58,665 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:56:58,665 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:56:58,666 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:56:58,666 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:56:58,666 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:56:58,666 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:56:58,686 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-12-21 21:56:58,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-21 21:56:58,692 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:56:58,693 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:56:58,693 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:56:58,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:56:58,700 INFO L82 PathProgramCache]: Analyzing trace with hash -919167012, now seen corresponding path program 1 times [2020-12-21 21:56:58,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:56:58,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612127697] [2020-12-21 21:56:58,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:56:58,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:56:58,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:56:58,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612127697] [2020-12-21 21:56:58,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:56:58,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 21:56:58,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043962126] [2020-12-21 21:56:58,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 21:56:58,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:56:58,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 21:56:58,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 21:56:58,914 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2020-12-21 21:56:58,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:56:58,932 INFO L93 Difference]: Finished difference Result 56 states and 86 transitions. [2020-12-21 21:56:58,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 21:56:58,933 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2020-12-21 21:56:58,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:56:58,942 INFO L225 Difference]: With dead ends: 56 [2020-12-21 21:56:58,943 INFO L226 Difference]: Without dead ends: 26 [2020-12-21 21:56:58,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 21:56:58,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-21 21:56:58,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-21 21:56:58,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-21 21:56:58,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2020-12-21 21:56:58,980 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 17 [2020-12-21 21:56:58,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:56:58,981 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2020-12-21 21:56:58,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 21:56:58,981 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2020-12-21 21:56:58,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-21 21:56:58,982 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:56:58,982 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:56:58,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:56:58,983 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:56:58,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:56:58,984 INFO L82 PathProgramCache]: Analyzing trace with hash 164788593, now seen corresponding path program 1 times [2020-12-21 21:56:58,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:56:58,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128064017] [2020-12-21 21:56:58,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:56:59,005 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:56:59,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [750539898] [2020-12-21 21:56:59,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:56:59,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:56:59,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-21 21:56:59,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:56:59,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:56:59,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128064017] [2020-12-21 21:56:59,146 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:56:59,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750539898] [2020-12-21 21:56:59,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:56:59,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:56:59,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449412282] [2020-12-21 21:56:59,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:56:59,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:56:59,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:56:59,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:56:59,150 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 3 states. [2020-12-21 21:56:59,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:56:59,168 INFO L93 Difference]: Finished difference Result 50 states and 70 transitions. [2020-12-21 21:56:59,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:56:59,169 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-12-21 21:56:59,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:56:59,170 INFO L225 Difference]: With dead ends: 50 [2020-12-21 21:56:59,170 INFO L226 Difference]: Without dead ends: 28 [2020-12-21 21:56:59,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:56:59,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-21 21:56:59,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-12-21 21:56:59,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-21 21:56:59,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2020-12-21 21:56:59,177 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 17 [2020-12-21 21:56:59,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:56:59,178 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2020-12-21 21:56:59,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:56:59,178 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2020-12-21 21:56:59,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-21 21:56:59,179 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:56:59,179 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:56:59,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-21 21:56:59,393 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:56:59,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:56:59,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1403287377, now seen corresponding path program 1 times [2020-12-21 21:56:59,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:56:59,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342141735] [2020-12-21 21:56:59,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:56:59,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:56:59,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:56:59,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342141735] [2020-12-21 21:56:59,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22597013] [2020-12-21 21:56:59,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:56:59,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:56:59,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-21 21:56:59,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:56:59,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:56:59,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:56:59,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-21 21:56:59,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107895002] [2020-12-21 21:56:59,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:56:59,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:56:59,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:56:59,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:56:59,679 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 3 states. [2020-12-21 21:56:59,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:56:59,766 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2020-12-21 21:56:59,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:56:59,766 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-12-21 21:56:59,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:56:59,768 INFO L225 Difference]: With dead ends: 57 [2020-12-21 21:56:59,768 INFO L226 Difference]: Without dead ends: 36 [2020-12-21 21:56:59,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:56:59,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-21 21:56:59,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-12-21 21:56:59,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-21 21:56:59,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2020-12-21 21:56:59,785 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2020-12-21 21:56:59,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:56:59,786 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2020-12-21 21:56:59,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:56:59,786 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2020-12-21 21:56:59,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-21 21:56:59,787 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:56:59,787 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:00,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:00,003 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:00,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:00,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1132417868, now seen corresponding path program 1 times [2020-12-21 21:57:00,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:00,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179976195] [2020-12-21 21:57:00,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:00,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:00,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-21 21:57:00,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179976195] [2020-12-21 21:57:00,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738958764] [2020-12-21 21:57:00,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:00,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:00,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-21 21:57:00,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:00,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 21:57:00,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:00,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-21 21:57:00,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948919439] [2020-12-21 21:57:00,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:57:00,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:00,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:57:00,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:00,192 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand 3 states. [2020-12-21 21:57:00,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:00,207 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2020-12-21 21:57:00,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:57:00,208 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-12-21 21:57:00,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:00,209 INFO L225 Difference]: With dead ends: 46 [2020-12-21 21:57:00,209 INFO L226 Difference]: Without dead ends: 35 [2020-12-21 21:57:00,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:00,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-21 21:57:00,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-12-21 21:57:00,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-21 21:57:00,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2020-12-21 21:57:00,216 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 28 [2020-12-21 21:57:00,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:00,216 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2020-12-21 21:57:00,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:57:00,217 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2020-12-21 21:57:00,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-21 21:57:00,218 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:00,218 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:00,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:00,434 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:00,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:00,436 INFO L82 PathProgramCache]: Analyzing trace with hash 513768630, now seen corresponding path program 1 times [2020-12-21 21:57:00,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:00,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397332300] [2020-12-21 21:57:00,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:00,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:00,503 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 21:57:00,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397332300] [2020-12-21 21:57:00,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268025996] [2020-12-21 21:57:00,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:00,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:00,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:57:00,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:00,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 21:57:00,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:00,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-21 21:57:00,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406337527] [2020-12-21 21:57:00,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:57:00,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:00,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:57:00,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:00,625 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand 3 states. [2020-12-21 21:57:00,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:00,676 INFO L93 Difference]: Finished difference Result 78 states and 103 transitions. [2020-12-21 21:57:00,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:57:00,677 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-12-21 21:57:00,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:00,678 INFO L225 Difference]: With dead ends: 78 [2020-12-21 21:57:00,678 INFO L226 Difference]: Without dead ends: 56 [2020-12-21 21:57:00,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:00,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-21 21:57:00,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2020-12-21 21:57:00,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-21 21:57:00,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 62 transitions. [2020-12-21 21:57:00,687 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 62 transitions. Word has length 30 [2020-12-21 21:57:00,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:00,687 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 62 transitions. [2020-12-21 21:57:00,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:57:00,687 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 62 transitions. [2020-12-21 21:57:00,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-21 21:57:00,689 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:00,689 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:00,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:00,906 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:00,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:00,907 INFO L82 PathProgramCache]: Analyzing trace with hash -303820238, now seen corresponding path program 1 times [2020-12-21 21:57:00,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:00,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896290777] [2020-12-21 21:57:00,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:00,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:00,965 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 21:57:00,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896290777] [2020-12-21 21:57:00,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179682084] [2020-12-21 21:57:00,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:01,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:01,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:57:01,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:01,132 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 21:57:01,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:57:01,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:57:01,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596175173] [2020-12-21 21:57:01,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:57:01,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:01,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:57:01,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:01,140 INFO L87 Difference]: Start difference. First operand 46 states and 62 transitions. Second operand 5 states. [2020-12-21 21:57:01,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:01,182 INFO L93 Difference]: Finished difference Result 90 states and 122 transitions. [2020-12-21 21:57:01,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:57:01,183 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-12-21 21:57:01,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:01,187 INFO L225 Difference]: With dead ends: 90 [2020-12-21 21:57:01,188 INFO L226 Difference]: Without dead ends: 49 [2020-12-21 21:57:01,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:01,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-21 21:57:01,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-12-21 21:57:01,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-21 21:57:01,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2020-12-21 21:57:01,204 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 30 [2020-12-21 21:57:01,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:01,204 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2020-12-21 21:57:01,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:57:01,205 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2020-12-21 21:57:01,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-21 21:57:01,206 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:01,206 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:01,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-21 21:57:01,424 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:01,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:01,425 INFO L82 PathProgramCache]: Analyzing trace with hash 612513716, now seen corresponding path program 2 times [2020-12-21 21:57:01,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:01,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285031204] [2020-12-21 21:57:01,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:01,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:01,469 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-21 21:57:01,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285031204] [2020-12-21 21:57:01,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893334644] [2020-12-21 21:57:01,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:01,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-21 21:57:01,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:01,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 21:57:01,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:01,662 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-21 21:57:01,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:01,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2020-12-21 21:57:01,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151767252] [2020-12-21 21:57:01,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:57:01,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:01,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:57:01,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:57:01,665 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand 8 states. [2020-12-21 21:57:01,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:01,753 INFO L93 Difference]: Finished difference Result 114 states and 143 transitions. [2020-12-21 21:57:01,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 21:57:01,753 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-12-21 21:57:01,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:01,755 INFO L225 Difference]: With dead ends: 114 [2020-12-21 21:57:01,755 INFO L226 Difference]: Without dead ends: 109 [2020-12-21 21:57:01,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:57:01,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-21 21:57:01,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-12-21 21:57:01,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-21 21:57:01,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 98 transitions. [2020-12-21 21:57:01,766 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 98 transitions. Word has length 32 [2020-12-21 21:57:01,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:01,766 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 98 transitions. [2020-12-21 21:57:01,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:57:01,767 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 98 transitions. [2020-12-21 21:57:01,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-21 21:57:01,768 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:01,768 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:01,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:01,982 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:01,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:01,983 INFO L82 PathProgramCache]: Analyzing trace with hash -582685651, now seen corresponding path program 1 times [2020-12-21 21:57:01,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:01,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562448432] [2020-12-21 21:57:01,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:01,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:02,024 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-21 21:57:02,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562448432] [2020-12-21 21:57:02,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091565360] [2020-12-21 21:57:02,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:02,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:02,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:57:02,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:02,150 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-21 21:57:02,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:57:02,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-21 21:57:02,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776909609] [2020-12-21 21:57:02,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:57:02,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:02,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:57:02,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:57:02,153 INFO L87 Difference]: Start difference. First operand 73 states and 98 transitions. Second operand 7 states. [2020-12-21 21:57:02,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:02,246 INFO L93 Difference]: Finished difference Result 162 states and 221 transitions. [2020-12-21 21:57:02,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:57:02,247 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-12-21 21:57:02,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:02,249 INFO L225 Difference]: With dead ends: 162 [2020-12-21 21:57:02,249 INFO L226 Difference]: Without dead ends: 96 [2020-12-21 21:57:02,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:57:02,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-21 21:57:02,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2020-12-21 21:57:02,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-21 21:57:02,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 115 transitions. [2020-12-21 21:57:02,260 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 115 transitions. Word has length 35 [2020-12-21 21:57:02,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:02,261 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 115 transitions. [2020-12-21 21:57:02,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:57:02,261 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 115 transitions. [2020-12-21 21:57:02,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-21 21:57:02,263 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:02,263 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:02,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:02,478 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:02,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:02,479 INFO L82 PathProgramCache]: Analyzing trace with hash 2109979210, now seen corresponding path program 2 times [2020-12-21 21:57:02,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:02,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411743360] [2020-12-21 21:57:02,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:02,497 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:02,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [291984420] [2020-12-21 21:57:02,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:02,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:57:02,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:02,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:57:02,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:02,639 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-12-21 21:57:02,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411743360] [2020-12-21 21:57:02,639 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:02,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291984420] [2020-12-21 21:57:02,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:02,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 21:57:02,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066674504] [2020-12-21 21:57:02,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 21:57:02,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:02,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 21:57:02,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:57:02,642 INFO L87 Difference]: Start difference. First operand 90 states and 115 transitions. Second operand 6 states. [2020-12-21 21:57:02,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:02,667 INFO L93 Difference]: Finished difference Result 174 states and 224 transitions. [2020-12-21 21:57:02,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:57:02,668 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-12-21 21:57:02,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:02,669 INFO L225 Difference]: With dead ends: 174 [2020-12-21 21:57:02,669 INFO L226 Difference]: Without dead ends: 93 [2020-12-21 21:57:02,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:57:02,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-21 21:57:02,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-12-21 21:57:02,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-21 21:57:02,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 117 transitions. [2020-12-21 21:57:02,678 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 117 transitions. Word has length 46 [2020-12-21 21:57:02,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:02,678 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 117 transitions. [2020-12-21 21:57:02,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 21:57:02,678 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 117 transitions. [2020-12-21 21:57:02,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-21 21:57:02,680 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:02,680 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:02,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-21 21:57:02,895 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:02,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:02,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1002085324, now seen corresponding path program 3 times [2020-12-21 21:57:02,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:02,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215444205] [2020-12-21 21:57:02,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:02,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:02,944 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-21 21:57:02,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215444205] [2020-12-21 21:57:02,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:57:02,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 21:57:02,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637933216] [2020-12-21 21:57:02,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 21:57:02,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:02,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 21:57:02,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:57:02,947 INFO L87 Difference]: Start difference. First operand 92 states and 117 transitions. Second operand 4 states. [2020-12-21 21:57:03,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:03,015 INFO L93 Difference]: Finished difference Result 177 states and 232 transitions. [2020-12-21 21:57:03,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:57:03,016 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-12-21 21:57:03,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:03,017 INFO L225 Difference]: With dead ends: 177 [2020-12-21 21:57:03,017 INFO L226 Difference]: Without dead ends: 108 [2020-12-21 21:57:03,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:57:03,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-21 21:57:03,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 83. [2020-12-21 21:57:03,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-21 21:57:03,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 99 transitions. [2020-12-21 21:57:03,026 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 99 transitions. Word has length 48 [2020-12-21 21:57:03,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:03,026 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 99 transitions. [2020-12-21 21:57:03,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 21:57:03,026 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 99 transitions. [2020-12-21 21:57:03,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-21 21:57:03,027 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:03,027 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:03,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-21 21:57:03,028 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:03,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:03,028 INFO L82 PathProgramCache]: Analyzing trace with hash 238121238, now seen corresponding path program 1 times [2020-12-21 21:57:03,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:03,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132626956] [2020-12-21 21:57:03,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:03,048 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:03,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2107205759] [2020-12-21 21:57:03,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:03,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:03,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:57:03,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:03,262 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-21 21:57:03,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132626956] [2020-12-21 21:57:03,263 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:03,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107205759] [2020-12-21 21:57:03,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:03,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-21 21:57:03,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811137505] [2020-12-21 21:57:03,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:57:03,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:03,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:57:03,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:57:03,265 INFO L87 Difference]: Start difference. First operand 83 states and 99 transitions. Second operand 7 states. [2020-12-21 21:57:03,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:03,296 INFO L93 Difference]: Finished difference Result 158 states and 190 transitions. [2020-12-21 21:57:03,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:57:03,297 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-12-21 21:57:03,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:03,298 INFO L225 Difference]: With dead ends: 158 [2020-12-21 21:57:03,298 INFO L226 Difference]: Without dead ends: 86 [2020-12-21 21:57:03,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:57:03,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-21 21:57:03,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-12-21 21:57:03,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-21 21:57:03,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 101 transitions. [2020-12-21 21:57:03,332 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 101 transitions. Word has length 54 [2020-12-21 21:57:03,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:03,332 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 101 transitions. [2020-12-21 21:57:03,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:57:03,332 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 101 transitions. [2020-12-21 21:57:03,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-21 21:57:03,333 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:03,333 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:03,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:03,547 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:03,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:03,548 INFO L82 PathProgramCache]: Analyzing trace with hash -428363624, now seen corresponding path program 2 times [2020-12-21 21:57:03,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:03,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983227241] [2020-12-21 21:57:03,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:03,562 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:03,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1572672696] [2020-12-21 21:57:03,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:03,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:57:03,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:03,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:57:03,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:03,733 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-21 21:57:03,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983227241] [2020-12-21 21:57:03,733 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:03,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572672696] [2020-12-21 21:57:03,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:03,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 21:57:03,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881443303] [2020-12-21 21:57:03,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:57:03,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:03,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:57:03,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:57:03,735 INFO L87 Difference]: Start difference. First operand 85 states and 101 transitions. Second operand 8 states. [2020-12-21 21:57:03,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:03,769 INFO L93 Difference]: Finished difference Result 160 states and 192 transitions. [2020-12-21 21:57:03,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 21:57:03,769 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2020-12-21 21:57:03,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:03,770 INFO L225 Difference]: With dead ends: 160 [2020-12-21 21:57:03,770 INFO L226 Difference]: Without dead ends: 88 [2020-12-21 21:57:03,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:57:03,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-21 21:57:03,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-12-21 21:57:03,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-21 21:57:03,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 103 transitions. [2020-12-21 21:57:03,777 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 103 transitions. Word has length 56 [2020-12-21 21:57:03,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:03,777 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 103 transitions. [2020-12-21 21:57:03,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:57:03,777 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 103 transitions. [2020-12-21 21:57:03,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-21 21:57:03,778 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:03,778 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:03,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:03,993 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:03,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:03,994 INFO L82 PathProgramCache]: Analyzing trace with hash -970188902, now seen corresponding path program 3 times [2020-12-21 21:57:03,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:03,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010589373] [2020-12-21 21:57:03,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:04,022 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:04,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1962514131] [2020-12-21 21:57:04,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:04,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 21:57:04,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:04,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:57:04,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:04,175 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-12-21 21:57:04,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010589373] [2020-12-21 21:57:04,176 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:04,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962514131] [2020-12-21 21:57:04,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:57:04,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 21:57:04,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929863778] [2020-12-21 21:57:04,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 21:57:04,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:04,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 21:57:04,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:57:04,178 INFO L87 Difference]: Start difference. First operand 87 states and 103 transitions. Second operand 4 states. [2020-12-21 21:57:04,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:04,213 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2020-12-21 21:57:04,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:57:04,214 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-12-21 21:57:04,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:04,215 INFO L225 Difference]: With dead ends: 116 [2020-12-21 21:57:04,215 INFO L226 Difference]: Without dead ends: 68 [2020-12-21 21:57:04,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:57:04,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-21 21:57:04,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 59. [2020-12-21 21:57:04,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-21 21:57:04,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2020-12-21 21:57:04,220 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 58 [2020-12-21 21:57:04,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:04,220 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2020-12-21 21:57:04,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 21:57:04,220 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2020-12-21 21:57:04,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-21 21:57:04,220 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:04,221 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:04,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-21 21:57:04,422 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:04,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:04,423 INFO L82 PathProgramCache]: Analyzing trace with hash -152540452, now seen corresponding path program 1 times [2020-12-21 21:57:04,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:04,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866015779] [2020-12-21 21:57:04,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:04,442 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:04,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [664828100] [2020-12-21 21:57:04,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:04,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:04,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:57:04,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:04,631 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-21 21:57:04,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866015779] [2020-12-21 21:57:04,632 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:04,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664828100] [2020-12-21 21:57:04,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:04,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-21 21:57:04,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038499256] [2020-12-21 21:57:04,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:57:04,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:04,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:57:04,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:57:04,634 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand 9 states. [2020-12-21 21:57:04,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:04,668 INFO L93 Difference]: Finished difference Result 106 states and 120 transitions. [2020-12-21 21:57:04,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:57:04,669 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-12-21 21:57:04,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:04,670 INFO L225 Difference]: With dead ends: 106 [2020-12-21 21:57:04,670 INFO L226 Difference]: Without dead ends: 62 [2020-12-21 21:57:04,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:57:04,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-21 21:57:04,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-12-21 21:57:04,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-21 21:57:04,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2020-12-21 21:57:04,674 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 58 [2020-12-21 21:57:04,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:04,674 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2020-12-21 21:57:04,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:57:04,675 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2020-12-21 21:57:04,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-21 21:57:04,675 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:04,675 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:04,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-21 21:57:04,890 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:04,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:04,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1155589794, now seen corresponding path program 2 times [2020-12-21 21:57:04,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:04,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042098511] [2020-12-21 21:57:04,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:04,919 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:04,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1833119199] [2020-12-21 21:57:04,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:05,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:57:05,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:05,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:57:05,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:05,156 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-21 21:57:05,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042098511] [2020-12-21 21:57:05,157 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:05,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833119199] [2020-12-21 21:57:05,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:05,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-21 21:57:05,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287924801] [2020-12-21 21:57:05,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 21:57:05,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:05,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 21:57:05,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:57:05,159 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand 10 states. [2020-12-21 21:57:05,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:05,201 INFO L93 Difference]: Finished difference Result 108 states and 122 transitions. [2020-12-21 21:57:05,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:57:05,201 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-12-21 21:57:05,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:05,202 INFO L225 Difference]: With dead ends: 108 [2020-12-21 21:57:05,202 INFO L226 Difference]: Without dead ends: 64 [2020-12-21 21:57:05,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:57:05,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-21 21:57:05,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-12-21 21:57:05,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-21 21:57:05,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2020-12-21 21:57:05,207 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 60 [2020-12-21 21:57:05,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:05,207 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2020-12-21 21:57:05,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 21:57:05,208 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2020-12-21 21:57:05,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-21 21:57:05,208 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:05,208 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:05,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-21 21:57:05,422 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:05,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:05,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1281634144, now seen corresponding path program 3 times [2020-12-21 21:57:05,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:05,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932968962] [2020-12-21 21:57:05,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:05,439 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:05,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1540341909] [2020-12-21 21:57:05,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:05,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 21:57:05,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:05,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:57:05,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:05,578 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-21 21:57:05,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932968962] [2020-12-21 21:57:05,578 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:05,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540341909] [2020-12-21 21:57:05,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:05,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-21 21:57:05,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204692008] [2020-12-21 21:57:05,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 21:57:05,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:05,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 21:57:05,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:57:05,587 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand 4 states. [2020-12-21 21:57:05,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:05,610 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2020-12-21 21:57:05,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:57:05,610 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2020-12-21 21:57:05,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:05,611 INFO L225 Difference]: With dead ends: 82 [2020-12-21 21:57:05,611 INFO L226 Difference]: Without dead ends: 66 [2020-12-21 21:57:05,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:57:05,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-21 21:57:05,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-12-21 21:57:05,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-21 21:57:05,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2020-12-21 21:57:05,616 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 62 [2020-12-21 21:57:05,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:05,616 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2020-12-21 21:57:05,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 21:57:05,616 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2020-12-21 21:57:05,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-21 21:57:05,617 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:05,617 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:05,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:05,829 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:05,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:05,830 INFO L82 PathProgramCache]: Analyzing trace with hash 377274978, now seen corresponding path program 4 times [2020-12-21 21:57:05,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:05,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659882874] [2020-12-21 21:57:05,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:05,858 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:05,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1972821203] [2020-12-21 21:57:05,859 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:05,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:57:05,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:05,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:57:05,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:05,986 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-21 21:57:05,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659882874] [2020-12-21 21:57:05,987 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:05,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972821203] [2020-12-21 21:57:05,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:05,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-21 21:57:05,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284453693] [2020-12-21 21:57:05,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:57:05,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:05,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:57:05,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:05,989 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand 5 states. [2020-12-21 21:57:06,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:06,092 INFO L93 Difference]: Finished difference Result 117 states and 133 transitions. [2020-12-21 21:57:06,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 21:57:06,093 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-12-21 21:57:06,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:06,094 INFO L225 Difference]: With dead ends: 117 [2020-12-21 21:57:06,094 INFO L226 Difference]: Without dead ends: 77 [2020-12-21 21:57:06,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:06,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-21 21:57:06,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2020-12-21 21:57:06,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-21 21:57:06,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2020-12-21 21:57:06,100 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 64 [2020-12-21 21:57:06,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:06,101 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2020-12-21 21:57:06,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:57:06,101 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2020-12-21 21:57:06,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-21 21:57:06,102 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:06,102 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:06,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-21 21:57:06,316 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:06,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:06,317 INFO L82 PathProgramCache]: Analyzing trace with hash -790114983, now seen corresponding path program 5 times [2020-12-21 21:57:06,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:06,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613523938] [2020-12-21 21:57:06,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:06,332 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:06,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1667450263] [2020-12-21 21:57:06,333 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:06,462 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-12-21 21:57:06,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:06,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:57:06,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:06,550 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-12-21 21:57:06,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613523938] [2020-12-21 21:57:06,551 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:06,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667450263] [2020-12-21 21:57:06,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:06,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 21:57:06,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679867331] [2020-12-21 21:57:06,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 21:57:06,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:06,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 21:57:06,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:57:06,553 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand 6 states. [2020-12-21 21:57:06,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:06,630 INFO L93 Difference]: Finished difference Result 132 states and 148 transitions. [2020-12-21 21:57:06,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:57:06,630 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-12-21 21:57:06,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:06,631 INFO L225 Difference]: With dead ends: 132 [2020-12-21 21:57:06,631 INFO L226 Difference]: Without dead ends: 86 [2020-12-21 21:57:06,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:57:06,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-21 21:57:06,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2020-12-21 21:57:06,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-21 21:57:06,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2020-12-21 21:57:06,636 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 73 [2020-12-21 21:57:06,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:06,637 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2020-12-21 21:57:06,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 21:57:06,637 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2020-12-21 21:57:06,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-21 21:57:06,638 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:06,638 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:06,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-21 21:57:06,852 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:06,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:06,853 INFO L82 PathProgramCache]: Analyzing trace with hash 426299330, now seen corresponding path program 6 times [2020-12-21 21:57:06,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:06,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269141045] [2020-12-21 21:57:06,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:06,865 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:06,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1877418050] [2020-12-21 21:57:06,865 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:07,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-21 21:57:07,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:07,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:57:07,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:07,268 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-12-21 21:57:07,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269141045] [2020-12-21 21:57:07,272 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:07,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877418050] [2020-12-21 21:57:07,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:07,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-21 21:57:07,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540978207] [2020-12-21 21:57:07,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:57:07,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:07,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:57:07,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:07,278 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand 5 states. [2020-12-21 21:57:07,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:07,301 INFO L93 Difference]: Finished difference Result 108 states and 117 transitions. [2020-12-21 21:57:07,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 21:57:07,302 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 82 [2020-12-21 21:57:07,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:07,305 INFO L225 Difference]: With dead ends: 108 [2020-12-21 21:57:07,305 INFO L226 Difference]: Without dead ends: 86 [2020-12-21 21:57:07,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:07,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-21 21:57:07,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-12-21 21:57:07,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-21 21:57:07,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2020-12-21 21:57:07,310 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 82 [2020-12-21 21:57:07,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:07,310 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2020-12-21 21:57:07,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:57:07,310 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2020-12-21 21:57:07,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-21 21:57:07,311 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:07,311 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:07,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:07,527 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:07,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:07,528 INFO L82 PathProgramCache]: Analyzing trace with hash -105690940, now seen corresponding path program 7 times [2020-12-21 21:57:07,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:07,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538528544] [2020-12-21 21:57:07,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:07,542 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:07,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1680584432] [2020-12-21 21:57:07,543 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:07,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:07,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:57:07,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:07,791 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2020-12-21 21:57:07,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538528544] [2020-12-21 21:57:07,792 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:07,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680584432] [2020-12-21 21:57:07,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:07,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-21 21:57:07,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359702123] [2020-12-21 21:57:07,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 21:57:07,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:07,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 21:57:07,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:57:07,794 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand 11 states. [2020-12-21 21:57:07,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:07,833 INFO L93 Difference]: Finished difference Result 154 states and 168 transitions. [2020-12-21 21:57:07,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 21:57:07,836 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 84 [2020-12-21 21:57:07,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:07,837 INFO L225 Difference]: With dead ends: 154 [2020-12-21 21:57:07,837 INFO L226 Difference]: Without dead ends: 88 [2020-12-21 21:57:07,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:57:07,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-21 21:57:07,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-12-21 21:57:07,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-21 21:57:07,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 94 transitions. [2020-12-21 21:57:07,847 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 94 transitions. Word has length 84 [2020-12-21 21:57:07,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:07,847 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 94 transitions. [2020-12-21 21:57:07,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 21:57:07,847 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 94 transitions. [2020-12-21 21:57:07,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-21 21:57:07,848 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:07,848 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:08,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:08,059 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:08,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:08,060 INFO L82 PathProgramCache]: Analyzing trace with hash 2063005894, now seen corresponding path program 8 times [2020-12-21 21:57:08,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:08,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176292048] [2020-12-21 21:57:08,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:08,075 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:08,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [840798188] [2020-12-21 21:57:08,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:08,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:57:08,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:08,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 21:57:08,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:08,313 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2020-12-21 21:57:08,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176292048] [2020-12-21 21:57:08,313 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:08,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840798188] [2020-12-21 21:57:08,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:08,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-21 21:57:08,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030457305] [2020-12-21 21:57:08,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:57:08,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:08,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:57:08,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:57:08,315 INFO L87 Difference]: Start difference. First operand 87 states and 94 transitions. Second operand 12 states. [2020-12-21 21:57:08,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:08,357 INFO L93 Difference]: Finished difference Result 155 states and 169 transitions. [2020-12-21 21:57:08,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 21:57:08,358 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 86 [2020-12-21 21:57:08,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:08,359 INFO L225 Difference]: With dead ends: 155 [2020-12-21 21:57:08,359 INFO L226 Difference]: Without dead ends: 89 [2020-12-21 21:57:08,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:57:08,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-21 21:57:08,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-12-21 21:57:08,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-21 21:57:08,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 96 transitions. [2020-12-21 21:57:08,364 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 96 transitions. Word has length 86 [2020-12-21 21:57:08,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:08,364 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 96 transitions. [2020-12-21 21:57:08,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:57:08,364 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 96 transitions. [2020-12-21 21:57:08,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-21 21:57:08,365 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:08,365 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:08,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:08,580 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:08,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:08,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1173442488, now seen corresponding path program 9 times [2020-12-21 21:57:08,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:08,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858970212] [2020-12-21 21:57:08,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:08,598 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:08,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1380717248] [2020-12-21 21:57:08,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:09,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 21:57:09,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:09,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:57:09,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:09,087 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2020-12-21 21:57:09,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858970212] [2020-12-21 21:57:09,088 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:09,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380717248] [2020-12-21 21:57:09,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:09,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-21 21:57:09,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074861313] [2020-12-21 21:57:09,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:57:09,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:09,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:57:09,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:09,090 INFO L87 Difference]: Start difference. First operand 89 states and 96 transitions. Second operand 5 states. [2020-12-21 21:57:09,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:09,167 INFO L93 Difference]: Finished difference Result 153 states and 173 transitions. [2020-12-21 21:57:09,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 21:57:09,168 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 88 [2020-12-21 21:57:09,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:09,169 INFO L225 Difference]: With dead ends: 153 [2020-12-21 21:57:09,170 INFO L226 Difference]: Without dead ends: 104 [2020-12-21 21:57:09,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:09,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-21 21:57:09,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 98. [2020-12-21 21:57:09,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-21 21:57:09,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2020-12-21 21:57:09,176 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 88 [2020-12-21 21:57:09,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:09,176 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2020-12-21 21:57:09,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:57:09,176 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2020-12-21 21:57:09,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-21 21:57:09,177 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:09,177 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:09,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-21 21:57:09,391 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:09,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:09,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1409703947, now seen corresponding path program 10 times [2020-12-21 21:57:09,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:09,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429021355] [2020-12-21 21:57:09,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:09,406 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:09,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2068384656] [2020-12-21 21:57:09,411 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:09,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:57:09,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:09,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:57:09,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:09,589 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2020-12-21 21:57:09,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429021355] [2020-12-21 21:57:09,589 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:09,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068384656] [2020-12-21 21:57:09,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:09,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-21 21:57:09,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966026864] [2020-12-21 21:57:09,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:57:09,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:09,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:57:09,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:57:09,591 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand 7 states. [2020-12-21 21:57:09,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:09,698 INFO L93 Difference]: Finished difference Result 173 states and 195 transitions. [2020-12-21 21:57:09,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:57:09,699 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 97 [2020-12-21 21:57:09,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:09,700 INFO L225 Difference]: With dead ends: 173 [2020-12-21 21:57:09,700 INFO L226 Difference]: Without dead ends: 110 [2020-12-21 21:57:09,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:57:09,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-21 21:57:09,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2020-12-21 21:57:09,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-21 21:57:09,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 117 transitions. [2020-12-21 21:57:09,705 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 117 transitions. Word has length 97 [2020-12-21 21:57:09,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:09,706 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 117 transitions. [2020-12-21 21:57:09,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:57:09,706 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 117 transitions. [2020-12-21 21:57:09,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-21 21:57:09,707 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:09,707 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 7, 7, 7, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:09,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-21 21:57:09,922 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:09,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:09,923 INFO L82 PathProgramCache]: Analyzing trace with hash -983224722, now seen corresponding path program 11 times [2020-12-21 21:57:09,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:09,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998224741] [2020-12-21 21:57:09,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:09,941 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:09,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [569166991] [2020-12-21 21:57:09,941 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:10,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-12-21 21:57:10,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:10,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:57:10,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:10,286 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2020-12-21 21:57:10,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998224741] [2020-12-21 21:57:10,287 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:10,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569166991] [2020-12-21 21:57:10,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:10,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 21:57:10,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015534033] [2020-12-21 21:57:10,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:57:10,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:10,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:57:10,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:57:10,289 INFO L87 Difference]: Start difference. First operand 107 states and 117 transitions. Second operand 8 states. [2020-12-21 21:57:10,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:10,404 INFO L93 Difference]: Finished difference Result 185 states and 207 transitions. [2020-12-21 21:57:10,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 21:57:10,404 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 106 [2020-12-21 21:57:10,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:10,405 INFO L225 Difference]: With dead ends: 185 [2020-12-21 21:57:10,405 INFO L226 Difference]: Without dead ends: 116 [2020-12-21 21:57:10,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:57:10,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-12-21 21:57:10,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2020-12-21 21:57:10,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-12-21 21:57:10,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 126 transitions. [2020-12-21 21:57:10,412 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 126 transitions. Word has length 106 [2020-12-21 21:57:10,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:10,412 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 126 transitions. [2020-12-21 21:57:10,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:57:10,412 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 126 transitions. [2020-12-21 21:57:10,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-21 21:57:10,413 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:10,414 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 8, 8, 8, 6, 6, 6, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:10,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:10,630 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:10,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:10,631 INFO L82 PathProgramCache]: Analyzing trace with hash -700509419, now seen corresponding path program 12 times [2020-12-21 21:57:10,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:10,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818508700] [2020-12-21 21:57:10,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:10,646 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:10,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1504447144] [2020-12-21 21:57:10,647 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:11,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-21 21:57:11,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:11,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:57:11,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:11,429 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-12-21 21:57:11,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818508700] [2020-12-21 21:57:11,429 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:11,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504447144] [2020-12-21 21:57:11,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:11,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 21:57:11,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260691427] [2020-12-21 21:57:11,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 21:57:11,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:11,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 21:57:11,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:57:11,431 INFO L87 Difference]: Start difference. First operand 116 states and 126 transitions. Second operand 6 states. [2020-12-21 21:57:11,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:11,461 INFO L93 Difference]: Finished difference Result 150 states and 163 transitions. [2020-12-21 21:57:11,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:57:11,461 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 115 [2020-12-21 21:57:11,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:11,462 INFO L225 Difference]: With dead ends: 150 [2020-12-21 21:57:11,462 INFO L226 Difference]: Without dead ends: 119 [2020-12-21 21:57:11,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:57:11,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-12-21 21:57:11,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2020-12-21 21:57:11,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-12-21 21:57:11,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 128 transitions. [2020-12-21 21:57:11,469 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 128 transitions. Word has length 115 [2020-12-21 21:57:11,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:11,469 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 128 transitions. [2020-12-21 21:57:11,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 21:57:11,469 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 128 transitions. [2020-12-21 21:57:11,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-21 21:57:11,470 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:11,471 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 8, 8, 8, 6, 6, 6, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:11,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-21 21:57:11,684 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:11,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:11,685 INFO L82 PathProgramCache]: Analyzing trace with hash -111816429, now seen corresponding path program 13 times [2020-12-21 21:57:11,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:11,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422215789] [2020-12-21 21:57:11,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:11,703 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:11,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [765616467] [2020-12-21 21:57:11,703 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:11,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:11,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:57:11,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:11,951 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-12-21 21:57:11,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422215789] [2020-12-21 21:57:11,952 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:11,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765616467] [2020-12-21 21:57:11,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:11,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-21 21:57:11,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771771676] [2020-12-21 21:57:11,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 21:57:11,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:11,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 21:57:11,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:57:11,953 INFO L87 Difference]: Start difference. First operand 118 states and 128 transitions. Second operand 11 states. [2020-12-21 21:57:12,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:12,179 INFO L93 Difference]: Finished difference Result 202 states and 227 transitions. [2020-12-21 21:57:12,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 21:57:12,180 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 117 [2020-12-21 21:57:12,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:12,181 INFO L225 Difference]: With dead ends: 202 [2020-12-21 21:57:12,182 INFO L226 Difference]: Without dead ends: 133 [2020-12-21 21:57:12,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:57:12,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-12-21 21:57:12,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 127. [2020-12-21 21:57:12,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-21 21:57:12,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 140 transitions. [2020-12-21 21:57:12,189 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 140 transitions. Word has length 117 [2020-12-21 21:57:12,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:12,190 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 140 transitions. [2020-12-21 21:57:12,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 21:57:12,190 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 140 transitions. [2020-12-21 21:57:12,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-12-21 21:57:12,191 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:12,191 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 6, 6, 6, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:12,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:12,405 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:12,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:12,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1649695946, now seen corresponding path program 14 times [2020-12-21 21:57:12,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:12,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19531448] [2020-12-21 21:57:12,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:12,418 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:12,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1750260379] [2020-12-21 21:57:12,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:12,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:57:12,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:12,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 21:57:12,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:12,731 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2020-12-21 21:57:12,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19531448] [2020-12-21 21:57:12,732 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:12,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750260379] [2020-12-21 21:57:12,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:12,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-21 21:57:12,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452581978] [2020-12-21 21:57:12,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:57:12,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:12,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:57:12,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:57:12,735 INFO L87 Difference]: Start difference. First operand 127 states and 140 transitions. Second operand 12 states. [2020-12-21 21:57:12,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:12,928 INFO L93 Difference]: Finished difference Result 211 states and 238 transitions. [2020-12-21 21:57:12,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 21:57:12,929 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 126 [2020-12-21 21:57:12,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:12,930 INFO L225 Difference]: With dead ends: 211 [2020-12-21 21:57:12,930 INFO L226 Difference]: Without dead ends: 136 [2020-12-21 21:57:12,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:57:12,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-12-21 21:57:12,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2020-12-21 21:57:12,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-12-21 21:57:12,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 152 transitions. [2020-12-21 21:57:12,937 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 152 transitions. Word has length 126 [2020-12-21 21:57:12,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:12,937 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 152 transitions. [2020-12-21 21:57:12,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:57:12,937 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 152 transitions. [2020-12-21 21:57:12,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-21 21:57:12,939 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:12,939 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 6, 6, 6, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:13,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-21 21:57:13,153 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:13,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:13,154 INFO L82 PathProgramCache]: Analyzing trace with hash -242787085, now seen corresponding path program 15 times [2020-12-21 21:57:13,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:13,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683721025] [2020-12-21 21:57:13,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:13,167 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:13,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1458149123] [2020-12-21 21:57:13,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:13,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-21 21:57:13,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:13,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:57:13,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:13,621 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2020-12-21 21:57:13,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683721025] [2020-12-21 21:57:13,621 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:13,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458149123] [2020-12-21 21:57:13,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:13,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-21 21:57:13,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986395037] [2020-12-21 21:57:13,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:57:13,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:13,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:57:13,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:57:13,623 INFO L87 Difference]: Start difference. First operand 136 states and 152 transitions. Second operand 7 states. [2020-12-21 21:57:13,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:13,653 INFO L93 Difference]: Finished difference Result 176 states and 197 transitions. [2020-12-21 21:57:13,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:57:13,654 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 135 [2020-12-21 21:57:13,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:13,654 INFO L225 Difference]: With dead ends: 176 [2020-12-21 21:57:13,655 INFO L226 Difference]: Without dead ends: 139 [2020-12-21 21:57:13,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:57:13,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-12-21 21:57:13,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2020-12-21 21:57:13,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-12-21 21:57:13,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 154 transitions. [2020-12-21 21:57:13,661 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 154 transitions. Word has length 135 [2020-12-21 21:57:13,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:13,661 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 154 transitions. [2020-12-21 21:57:13,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:57:13,662 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 154 transitions. [2020-12-21 21:57:13,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-12-21 21:57:13,663 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:13,663 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 6, 6, 6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:13,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-21 21:57:13,874 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:13,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:13,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1975493873, now seen corresponding path program 16 times [2020-12-21 21:57:13,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:13,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052592060] [2020-12-21 21:57:13,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:13,894 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:13,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [115314] [2020-12-21 21:57:13,894 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:14,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:57:14,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:14,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:57:14,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:14,154 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2020-12-21 21:57:14,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052592060] [2020-12-21 21:57:14,154 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:14,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115314] [2020-12-21 21:57:14,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:14,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 21:57:14,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647445220] [2020-12-21 21:57:14,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:57:14,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:14,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:57:14,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:57:14,156 INFO L87 Difference]: Start difference. First operand 138 states and 154 transitions. Second operand 8 states. [2020-12-21 21:57:14,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:14,185 INFO L93 Difference]: Finished difference Result 178 states and 199 transitions. [2020-12-21 21:57:14,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 21:57:14,186 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 137 [2020-12-21 21:57:14,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:14,187 INFO L225 Difference]: With dead ends: 178 [2020-12-21 21:57:14,187 INFO L226 Difference]: Without dead ends: 141 [2020-12-21 21:57:14,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:57:14,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-12-21 21:57:14,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2020-12-21 21:57:14,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-12-21 21:57:14,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 156 transitions. [2020-12-21 21:57:14,194 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 156 transitions. Word has length 137 [2020-12-21 21:57:14,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:14,194 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 156 transitions. [2020-12-21 21:57:14,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:57:14,194 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 156 transitions. [2020-12-21 21:57:14,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-12-21 21:57:14,196 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:14,196 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 6, 6, 6, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:14,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-21 21:57:14,410 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:14,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:14,411 INFO L82 PathProgramCache]: Analyzing trace with hash -855251601, now seen corresponding path program 17 times [2020-12-21 21:57:14,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:14,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104756498] [2020-12-21 21:57:14,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:14,428 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:14,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1613164467] [2020-12-21 21:57:14,428 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:14,969 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-12-21 21:57:14,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:14,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:57:14,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:15,162 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2020-12-21 21:57:15,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104756498] [2020-12-21 21:57:15,163 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:15,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613164467] [2020-12-21 21:57:15,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:15,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-21 21:57:15,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789231646] [2020-12-21 21:57:15,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:57:15,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:15,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:57:15,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:57:15,165 INFO L87 Difference]: Start difference. First operand 140 states and 156 transitions. Second operand 9 states. [2020-12-21 21:57:15,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:15,197 INFO L93 Difference]: Finished difference Result 180 states and 201 transitions. [2020-12-21 21:57:15,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:57:15,198 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 139 [2020-12-21 21:57:15,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:15,199 INFO L225 Difference]: With dead ends: 180 [2020-12-21 21:57:15,199 INFO L226 Difference]: Without dead ends: 143 [2020-12-21 21:57:15,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:57:15,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-12-21 21:57:15,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2020-12-21 21:57:15,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-12-21 21:57:15,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 158 transitions. [2020-12-21 21:57:15,206 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 158 transitions. Word has length 139 [2020-12-21 21:57:15,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:15,206 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 158 transitions. [2020-12-21 21:57:15,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:57:15,207 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 158 transitions. [2020-12-21 21:57:15,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-12-21 21:57:15,208 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:15,208 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 7, 7, 6, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:15,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:15,423 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:15,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:15,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1807613549, now seen corresponding path program 18 times [2020-12-21 21:57:15,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:15,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216783189] [2020-12-21 21:57:15,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:15,436 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:15,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1901366115] [2020-12-21 21:57:15,437 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true