/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:19:50,762 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:19:50,766 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:19:50,821 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 21:19:50,821 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 21:19:50,825 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 21:19:50,829 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 21:19:50,837 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 21:19:50,840 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 21:19:50,846 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 21:19:50,847 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 21:19:50,848 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 21:19:50,849 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 21:19:50,850 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 21:19:50,855 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 21:19:50,857 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 21:19:50,859 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 21:19:50,869 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 21:19:50,871 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 21:19:50,874 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 21:19:50,876 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 21:19:50,877 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 21:19:50,879 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 21:19:50,880 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 21:19:50,883 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 21:19:50,893 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 21:19:50,894 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 21:19:50,895 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 21:19:50,897 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:19:50,924 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:19:50,924 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:19:50,926 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:19:50,926 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:19:50,927 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:19:50,927 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:19:50,927 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:19:50,927 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:19:50,928 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:19:50,928 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:19:50,928 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:19:50,928 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:19:50,929 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:19:50,929 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:19:50,929 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:19:50,929 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:19:50,929 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:19:50,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:19:50,930 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:19:50,930 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:19:50,930 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:19:50,931 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:19:50,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:19:50,931 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:19:50,931 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:19:50,931 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:19:51,371 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:19:51,400 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:19:51,404 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:19:51,405 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:19:51,406 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:19:51,407 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-2.i [2020-12-21 21:19:51,505 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de435557c/b93ab37d558a409b9bea6691c68c0526/FLAGe117bab34 [2020-12-21 21:19:52,139 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:19:52,139 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-2.i [2020-12-21 21:19:52,147 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de435557c/b93ab37d558a409b9bea6691c68c0526/FLAGe117bab34 [2020-12-21 21:19:52,510 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de435557c/b93ab37d558a409b9bea6691c68c0526 [2020-12-21 21:19:52,516 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:19:52,518 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:19:52,520 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:19:52,520 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:19:52,526 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:19:52,528 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,530 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6932e415 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52, skipping insertion in model container [2020-12-21 21:19:52,530 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,540 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:19:52,563 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:19:52,722 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-2.i[832,845] [2020-12-21 21:19:52,749 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:19:52,767 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:19:52,788 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-2.i[832,845] [2020-12-21 21:19:52,819 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:19:52,838 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:19:52,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52 WrapperNode [2020-12-21 21:19:52,839 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:19:52,840 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:19:52,840 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:19:52,840 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:19:52,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,857 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,887 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:19:52,888 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:19:52,888 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:19:52,888 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:19:52,898 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,899 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,903 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,903 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,912 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,919 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,921 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,924 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:19:52,925 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:19:52,926 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:19:52,926 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:19:52,927 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (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 21:19:53,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:19:53,028 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:19:53,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:19:53,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:19:53,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:19:53,028 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:19:53,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 21:19:53,473 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:19:53,473 INFO L299 CfgBuilder]: Removed 20 assume(true) statements. [2020-12-21 21:19:53,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:19:53 BoogieIcfgContainer [2020-12-21 21:19:53,476 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:19:53,478 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:19:53,478 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:19:53,482 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:19:53,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:19:52" (1/3) ... [2020-12-21 21:19:53,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e53e7da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:19:53, skipping insertion in model container [2020-12-21 21:19:53,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (2/3) ... [2020-12-21 21:19:53,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e53e7da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:19:53, skipping insertion in model container [2020-12-21 21:19:53,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:19:53" (3/3) ... [2020-12-21 21:19:53,490 INFO L111 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_ground-2.i [2020-12-21 21:19:53,501 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:19:53,510 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-21 21:19:53,531 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-21 21:19:53,563 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:19:53,563 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:19:53,564 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:19:53,564 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:19:53,564 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:19:53,564 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:19:53,564 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:19:53,565 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:19:53,583 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-12-21 21:19:53,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-21 21:19:53,590 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:53,591 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:53,591 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:53,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:53,599 INFO L82 PathProgramCache]: Analyzing trace with hash 212109301, now seen corresponding path program 1 times [2020-12-21 21:19:53,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:53,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128901635] [2020-12-21 21:19:53,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:53,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:53,815 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 21:19:53,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128901635] [2020-12-21 21:19:53,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:19:53,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:19:53,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44900540] [2020-12-21 21:19:53,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:19:53,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:53,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:19:53,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:19:53,844 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2020-12-21 21:19:53,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:53,947 INFO L93 Difference]: Finished difference Result 110 states and 165 transitions. [2020-12-21 21:19:53,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:19:53,950 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-21 21:19:53,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:53,961 INFO L225 Difference]: With dead ends: 110 [2020-12-21 21:19:53,961 INFO L226 Difference]: Without dead ends: 67 [2020-12-21 21:19:53,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 21:19:53,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-21 21:19:54,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 36. [2020-12-21 21:19:54,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-21 21:19:54,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2020-12-21 21:19:54,012 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 8 [2020-12-21 21:19:54,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:54,013 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2020-12-21 21:19:54,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:19:54,014 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2020-12-21 21:19:54,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-21 21:19:54,014 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:54,015 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:54,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:19:54,015 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:54,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:54,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1436007159, now seen corresponding path program 1 times [2020-12-21 21:19:54,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:54,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360956518] [2020-12-21 21:19:54,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:54,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:54,068 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 21:19:54,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360956518] [2020-12-21 21:19:54,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654656251] [2020-12-21 21:19:54,070 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 21:19:54,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:54,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:19:54,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:54,243 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 21:19:54,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:54,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:19:54,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825120354] [2020-12-21 21:19:54,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:19:54,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:54,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:19:54,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:19:54,248 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand 5 states. [2020-12-21 21:19:54,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:54,365 INFO L93 Difference]: Finished difference Result 130 states and 164 transitions. [2020-12-21 21:19:54,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:19:54,366 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-21 21:19:54,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:54,368 INFO L225 Difference]: With dead ends: 130 [2020-12-21 21:19:54,368 INFO L226 Difference]: Without dead ends: 99 [2020-12-21 21:19:54,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 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 21:19:54,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-21 21:19:54,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 38. [2020-12-21 21:19:54,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-21 21:19:54,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2020-12-21 21:19:54,379 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 10 [2020-12-21 21:19:54,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:54,380 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2020-12-21 21:19:54,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:19:54,380 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2020-12-21 21:19:54,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-21 21:19:54,381 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:54,381 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:54,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-21 21:19:54,595 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:54,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:54,598 INFO L82 PathProgramCache]: Analyzing trace with hash 780809593, now seen corresponding path program 2 times [2020-12-21 21:19:54,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:54,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324745835] [2020-12-21 21:19:54,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:54,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:54,713 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 21:19:54,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324745835] [2020-12-21 21:19:54,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:19:54,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 21:19:54,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526625202] [2020-12-21 21:19:54,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 21:19:54,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:54,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 21:19:54,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:19:54,719 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand 4 states. [2020-12-21 21:19:54,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:54,792 INFO L93 Difference]: Finished difference Result 72 states and 92 transitions. [2020-12-21 21:19:54,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:19:54,795 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-21 21:19:54,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:54,796 INFO L225 Difference]: With dead ends: 72 [2020-12-21 21:19:54,796 INFO L226 Difference]: Without dead ends: 40 [2020-12-21 21:19:54,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 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 21:19:54,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-21 21:19:54,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-12-21 21:19:54,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-21 21:19:54,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2020-12-21 21:19:54,812 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 12 [2020-12-21 21:19:54,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:54,812 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2020-12-21 21:19:54,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 21:19:54,813 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2020-12-21 21:19:54,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-21 21:19:54,814 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:54,814 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] [2020-12-21 21:19:54,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-21 21:19:54,815 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:54,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:54,816 INFO L82 PathProgramCache]: Analyzing trace with hash 27211895, now seen corresponding path program 1 times [2020-12-21 21:19:54,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:54,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088271628] [2020-12-21 21:19:54,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:54,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:54,901 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 21:19:54,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088271628] [2020-12-21 21:19:54,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:19:54,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:19:54,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645212780] [2020-12-21 21:19:54,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:19:54,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:54,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:19:54,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:19:54,908 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand 3 states. [2020-12-21 21:19:54,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:54,964 INFO L93 Difference]: Finished difference Result 78 states and 100 transitions. [2020-12-21 21:19:54,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:19:54,968 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-12-21 21:19:54,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:54,968 INFO L225 Difference]: With dead ends: 78 [2020-12-21 21:19:54,969 INFO L226 Difference]: Without dead ends: 51 [2020-12-21 21:19:54,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 21:19:54,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-21 21:19:54,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-12-21 21:19:54,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-21 21:19:54,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2020-12-21 21:19:54,987 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 25 [2020-12-21 21:19:54,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:54,987 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2020-12-21 21:19:54,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:19:54,987 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2020-12-21 21:19:54,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-21 21:19:54,992 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:54,992 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] [2020-12-21 21:19:54,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-21 21:19:54,992 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:54,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:54,994 INFO L82 PathProgramCache]: Analyzing trace with hash 676355061, now seen corresponding path program 1 times [2020-12-21 21:19:54,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:54,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343613811] [2020-12-21 21:19:54,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:55,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:55,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 21:19:55,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343613811] [2020-12-21 21:19:55,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141003983] [2020-12-21 21:19:55,080 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 21:19:55,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:55,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:19:55,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:55,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-21 21:19:55,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:55,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-21 21:19:55,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597347532] [2020-12-21 21:19:55,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:19:55,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:55,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:19:55,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:19:55,233 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand 7 states. [2020-12-21 21:19:55,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:55,334 INFO L93 Difference]: Finished difference Result 130 states and 164 transitions. [2020-12-21 21:19:55,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:19:55,334 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-12-21 21:19:55,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:55,336 INFO L225 Difference]: With dead ends: 130 [2020-12-21 21:19:55,336 INFO L226 Difference]: Without dead ends: 97 [2020-12-21 21:19:55,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:19:55,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-21 21:19:55,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 54. [2020-12-21 21:19:55,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-21 21:19:55,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2020-12-21 21:19:55,348 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 27 [2020-12-21 21:19:55,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:55,348 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2020-12-21 21:19:55,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:19:55,349 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2020-12-21 21:19:55,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-21 21:19:55,350 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:55,350 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-21 21:19:55,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:55,566 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:55,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:55,567 INFO L82 PathProgramCache]: Analyzing trace with hash -719529317, now seen corresponding path program 1 times [2020-12-21 21:19:55,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:55,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392621377] [2020-12-21 21:19:55,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:55,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:55,655 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-21 21:19:55,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392621377] [2020-12-21 21:19:55,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:19:55,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 21:19:55,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410959984] [2020-12-21 21:19:55,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 21:19:55,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:55,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 21:19:55,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:19:55,659 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand 4 states. [2020-12-21 21:19:55,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:55,689 INFO L93 Difference]: Finished difference Result 101 states and 127 transitions. [2020-12-21 21:19:55,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:19:55,691 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2020-12-21 21:19:55,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:55,694 INFO L225 Difference]: With dead ends: 101 [2020-12-21 21:19:55,697 INFO L226 Difference]: Without dead ends: 75 [2020-12-21 21:19:55,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:19:55,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-21 21:19:55,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 57. [2020-12-21 21:19:55,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-21 21:19:55,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2020-12-21 21:19:55,716 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 37 [2020-12-21 21:19:55,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:55,721 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2020-12-21 21:19:55,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 21:19:55,721 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2020-12-21 21:19:55,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-21 21:19:55,723 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:55,723 INFO L422 BasicCegarLoop]: trace histogram [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, 1] [2020-12-21 21:19:55,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-21 21:19:55,723 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:55,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:55,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1553643301, now seen corresponding path program 1 times [2020-12-21 21:19:55,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:55,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228185892] [2020-12-21 21:19:55,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:55,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:55,855 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-21 21:19:55,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228185892] [2020-12-21 21:19:55,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648217837] [2020-12-21 21:19:55,856 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 21:19:55,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:55,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:19:55,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:55,992 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-21 21:19:55,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:55,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-21 21:19:55,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536174751] [2020-12-21 21:19:55,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:19:55,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:55,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:19:55,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:19:55,996 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand 7 states. [2020-12-21 21:19:56,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:56,054 INFO L93 Difference]: Finished difference Result 140 states and 170 transitions. [2020-12-21 21:19:56,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:19:56,055 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 37 [2020-12-21 21:19:56,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:56,056 INFO L225 Difference]: With dead ends: 140 [2020-12-21 21:19:56,056 INFO L226 Difference]: Without dead ends: 92 [2020-12-21 21:19:56,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:19:56,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-21 21:19:56,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 59. [2020-12-21 21:19:56,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-21 21:19:56,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2020-12-21 21:19:56,065 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 37 [2020-12-21 21:19:56,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:56,065 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2020-12-21 21:19:56,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:19:56,065 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2020-12-21 21:19:56,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-21 21:19:56,067 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:56,067 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1] [2020-12-21 21:19:56,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:56,281 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:56,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:56,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1678883683, now seen corresponding path program 2 times [2020-12-21 21:19:56,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:56,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766484811] [2020-12-21 21:19:56,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:56,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:56,351 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-21 21:19:56,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766484811] [2020-12-21 21:19:56,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146417112] [2020-12-21 21:19:56,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:56,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:19:56,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:19:56,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:19:56,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:56,521 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-21 21:19:56,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:56,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-21 21:19:56,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972731816] [2020-12-21 21:19:56,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:19:56,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:56,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:19:56,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:19:56,527 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand 8 states. [2020-12-21 21:19:56,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:56,639 INFO L93 Difference]: Finished difference Result 150 states and 181 transitions. [2020-12-21 21:19:56,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:19:56,640 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 39 [2020-12-21 21:19:56,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:56,641 INFO L225 Difference]: With dead ends: 150 [2020-12-21 21:19:56,641 INFO L226 Difference]: Without dead ends: 102 [2020-12-21 21:19:56,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:19:56,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-21 21:19:56,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 61. [2020-12-21 21:19:56,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-21 21:19:56,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2020-12-21 21:19:56,658 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 39 [2020-12-21 21:19:56,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:56,660 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2020-12-21 21:19:56,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:19:56,661 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2020-12-21 21:19:56,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-21 21:19:56,662 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:56,662 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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, 1] [2020-12-21 21:19:56,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:56,863 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:56,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:56,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1775806497, now seen corresponding path program 3 times [2020-12-21 21:19:56,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:56,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612018237] [2020-12-21 21:19:56,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:56,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:56,948 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-21 21:19:56,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612018237] [2020-12-21 21:19:56,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268709975] [2020-12-21 21:19:56,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:57,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 21:19:57,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:19:57,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:19:57,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:57,120 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-12-21 21:19:57,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:57,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2020-12-21 21:19:57,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702160835] [2020-12-21 21:19:57,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 21:19:57,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:57,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 21:19:57,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:19:57,131 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand 11 states. [2020-12-21 21:19:57,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:57,316 INFO L93 Difference]: Finished difference Result 199 states and 245 transitions. [2020-12-21 21:19:57,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 21:19:57,316 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-12-21 21:19:57,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:57,318 INFO L225 Difference]: With dead ends: 199 [2020-12-21 21:19:57,318 INFO L226 Difference]: Without dead ends: 151 [2020-12-21 21:19:57,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:19:57,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-12-21 21:19:57,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 83. [2020-12-21 21:19:57,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-21 21:19:57,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 102 transitions. [2020-12-21 21:19:57,328 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 102 transitions. Word has length 41 [2020-12-21 21:19:57,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:57,329 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 102 transitions. [2020-12-21 21:19:57,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 21:19:57,329 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 102 transitions. [2020-12-21 21:19:57,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-21 21:19:57,330 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:57,330 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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] [2020-12-21 21:19:57,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:57,545 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:57,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:57,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1861088943, now seen corresponding path program 4 times [2020-12-21 21:19:57,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:57,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30085010] [2020-12-21 21:19:57,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:57,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:57,686 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-21 21:19:57,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30085010] [2020-12-21 21:19:57,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958970620] [2020-12-21 21:19:57,687 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 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 21:19:57,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:19:57,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:19:57,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:19:57,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:57,932 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-21 21:19:57,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:57,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-21 21:19:57,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709093589] [2020-12-21 21:19:57,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 21:19:57,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:57,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 21:19:57,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:19:57,937 INFO L87 Difference]: Start difference. First operand 83 states and 102 transitions. Second operand 10 states. [2020-12-21 21:19:58,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:58,032 INFO L93 Difference]: Finished difference Result 210 states and 255 transitions. [2020-12-21 21:19:58,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:19:58,032 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2020-12-21 21:19:58,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:58,033 INFO L225 Difference]: With dead ends: 210 [2020-12-21 21:19:58,033 INFO L226 Difference]: Without dead ends: 142 [2020-12-21 21:19:58,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:19:58,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-12-21 21:19:58,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 85. [2020-12-21 21:19:58,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-21 21:19:58,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 104 transitions. [2020-12-21 21:19:58,058 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 104 transitions. Word has length 51 [2020-12-21 21:19:58,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:58,060 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 104 transitions. [2020-12-21 21:19:58,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 21:19:58,060 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 104 transitions. [2020-12-21 21:19:58,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-21 21:19:58,068 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:58,068 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 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] [2020-12-21 21:19:58,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:58,271 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:58,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:58,272 INFO L82 PathProgramCache]: Analyzing trace with hash -317339377, now seen corresponding path program 5 times [2020-12-21 21:19:58,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:58,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895049936] [2020-12-21 21:19:58,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:58,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:58,395 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-21 21:19:58,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895049936] [2020-12-21 21:19:58,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987954891] [2020-12-21 21:19:58,396 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 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 21:19:58,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-12-21 21:19:58,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:19:58,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:19:58,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:58,762 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-12-21 21:19:58,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:58,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2020-12-21 21:19:58,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098695370] [2020-12-21 21:19:58,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:19:58,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:58,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:19:58,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:19:58,770 INFO L87 Difference]: Start difference. First operand 85 states and 104 transitions. Second operand 14 states. [2020-12-21 21:19:58,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:58,988 INFO L93 Difference]: Finished difference Result 259 states and 319 transitions. [2020-12-21 21:19:58,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 21:19:58,989 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2020-12-21 21:19:58,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:58,990 INFO L225 Difference]: With dead ends: 259 [2020-12-21 21:19:58,991 INFO L226 Difference]: Without dead ends: 191 [2020-12-21 21:19:58,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:19:58,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-12-21 21:19:59,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 107. [2020-12-21 21:19:59,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-21 21:19:59,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 132 transitions. [2020-12-21 21:19:59,013 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 132 transitions. Word has length 53 [2020-12-21 21:19:59,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:59,014 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 132 transitions. [2020-12-21 21:19:59,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:19:59,014 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 132 transitions. [2020-12-21 21:19:59,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-21 21:19:59,018 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:59,018 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:59,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:59,233 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:59,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:59,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1281956417, now seen corresponding path program 6 times [2020-12-21 21:19:59,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:59,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369275029] [2020-12-21 21:19:59,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:59,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:59,402 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-12-21 21:19:59,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369275029] [2020-12-21 21:19:59,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793473183] [2020-12-21 21:19:59,403 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 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 21:19:59,634 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-21 21:19:59,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:19:59,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:19:59,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:59,716 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-12-21 21:19:59,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:59,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-21 21:19:59,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257903768] [2020-12-21 21:19:59,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:19:59,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:59,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:19:59,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:19:59,719 INFO L87 Difference]: Start difference. First operand 107 states and 132 transitions. Second operand 12 states. [2020-12-21 21:19:59,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:59,827 INFO L93 Difference]: Finished difference Result 270 states and 329 transitions. [2020-12-21 21:19:59,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 21:19:59,827 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 63 [2020-12-21 21:19:59,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:59,828 INFO L225 Difference]: With dead ends: 270 [2020-12-21 21:19:59,829 INFO L226 Difference]: Without dead ends: 182 [2020-12-21 21:19:59,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:19:59,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-12-21 21:19:59,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 109. [2020-12-21 21:19:59,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-21 21:19:59,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 134 transitions. [2020-12-21 21:19:59,837 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 134 transitions. Word has length 63 [2020-12-21 21:19:59,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:59,838 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 134 transitions. [2020-12-21 21:19:59,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:19:59,838 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 134 transitions. [2020-12-21 21:19:59,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-21 21:19:59,839 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:59,839 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:00,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-21 21:20:00,053 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:00,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:00,054 INFO L82 PathProgramCache]: Analyzing trace with hash -365758339, now seen corresponding path program 7 times [2020-12-21 21:20:00,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:00,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282582960] [2020-12-21 21:20:00,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:00,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:00,201 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-12-21 21:20:00,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282582960] [2020-12-21 21:20:00,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608968083] [2020-12-21 21:20:00,202 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 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 21:20:00,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:00,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 21:20:00,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:00,397 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-12-21 21:20:00,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:00,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-21 21:20:00,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699817400] [2020-12-21 21:20:00,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 21:20:00,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:00,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 21:20:00,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:20:00,399 INFO L87 Difference]: Start difference. First operand 109 states and 134 transitions. Second operand 13 states. [2020-12-21 21:20:00,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:00,516 INFO L93 Difference]: Finished difference Result 280 states and 340 transitions. [2020-12-21 21:20:00,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 21:20:00,517 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-12-21 21:20:00,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:00,519 INFO L225 Difference]: With dead ends: 280 [2020-12-21 21:20:00,519 INFO L226 Difference]: Without dead ends: 192 [2020-12-21 21:20:00,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:20:00,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-12-21 21:20:00,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 111. [2020-12-21 21:20:00,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-21 21:20:00,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 136 transitions. [2020-12-21 21:20:00,530 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 136 transitions. Word has length 65 [2020-12-21 21:20:00,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:00,530 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 136 transitions. [2020-12-21 21:20:00,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 21:20:00,530 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 136 transitions. [2020-12-21 21:20:00,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-21 21:20:00,531 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:00,531 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:00,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:00,746 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:00,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:00,747 INFO L82 PathProgramCache]: Analyzing trace with hash -367701061, now seen corresponding path program 8 times [2020-12-21 21:20:00,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:00,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890501075] [2020-12-21 21:20:00,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:00,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:00,913 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-12-21 21:20:00,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890501075] [2020-12-21 21:20:00,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226475768] [2020-12-21 21:20:00,914 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 21:20:01,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:20:01,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:01,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 21:20:01,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:01,126 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-12-21 21:20:01,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:01,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-21 21:20:01,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431890938] [2020-12-21 21:20:01,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:20:01,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:01,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:20:01,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:20:01,129 INFO L87 Difference]: Start difference. First operand 111 states and 136 transitions. Second operand 14 states. [2020-12-21 21:20:01,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:01,249 INFO L93 Difference]: Finished difference Result 290 states and 351 transitions. [2020-12-21 21:20:01,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 21:20:01,250 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-12-21 21:20:01,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:01,251 INFO L225 Difference]: With dead ends: 290 [2020-12-21 21:20:01,251 INFO L226 Difference]: Without dead ends: 202 [2020-12-21 21:20:01,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:20:01,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-12-21 21:20:01,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 113. [2020-12-21 21:20:01,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-21 21:20:01,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 138 transitions. [2020-12-21 21:20:01,261 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 138 transitions. Word has length 67 [2020-12-21 21:20:01,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:01,262 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 138 transitions. [2020-12-21 21:20:01,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:20:01,262 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 138 transitions. [2020-12-21 21:20:01,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-21 21:20:01,263 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:01,263 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:01,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:01,478 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:01,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:01,479 INFO L82 PathProgramCache]: Analyzing trace with hash 2060310393, now seen corresponding path program 9 times [2020-12-21 21:20:01,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:01,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275724146] [2020-12-21 21:20:01,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:01,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:01,636 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-12-21 21:20:01,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275724146] [2020-12-21 21:20:01,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553035885] [2020-12-21 21:20:01,637 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 21:20:01,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-21 21:20:01,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:01,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:20:01,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:01,898 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2020-12-21 21:20:01,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:01,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2020-12-21 21:20:01,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346081919] [2020-12-21 21:20:01,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-21 21:20:01,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:01,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-21 21:20:01,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-12-21 21:20:01,900 INFO L87 Difference]: Start difference. First operand 113 states and 138 transitions. Second operand 19 states. [2020-12-21 21:20:02,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:02,498 INFO L93 Difference]: Finished difference Result 341 states and 411 transitions. [2020-12-21 21:20:02,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-21 21:20:02,498 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 69 [2020-12-21 21:20:02,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:02,500 INFO L225 Difference]: With dead ends: 341 [2020-12-21 21:20:02,500 INFO L226 Difference]: Without dead ends: 248 [2020-12-21 21:20:02,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=431, Invalid=901, Unknown=0, NotChecked=0, Total=1332 [2020-12-21 21:20:02,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-12-21 21:20:02,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 130. [2020-12-21 21:20:02,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-12-21 21:20:02,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 158 transitions. [2020-12-21 21:20:02,513 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 158 transitions. Word has length 69 [2020-12-21 21:20:02,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:02,513 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 158 transitions. [2020-12-21 21:20:02,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-21 21:20:02,514 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 158 transitions. [2020-12-21 21:20:02,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-21 21:20:02,514 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:02,515 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:02,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-21 21:20:02,729 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:02,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:02,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1606980217, now seen corresponding path program 10 times [2020-12-21 21:20:02,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:02,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881234809] [2020-12-21 21:20:02,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:02,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:02,907 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-12-21 21:20:02,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881234809] [2020-12-21 21:20:02,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812866356] [2020-12-21 21:20:02,908 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 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 21:20:03,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:20:03,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:03,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:20:03,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:03,172 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2020-12-21 21:20:03,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:03,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 20 [2020-12-21 21:20:03,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331740248] [2020-12-21 21:20:03,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-21 21:20:03,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:03,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-21 21:20:03,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-12-21 21:20:03,175 INFO L87 Difference]: Start difference. First operand 130 states and 158 transitions. Second operand 20 states. [2020-12-21 21:20:03,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:03,458 INFO L93 Difference]: Finished difference Result 413 states and 505 transitions. [2020-12-21 21:20:03,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-21 21:20:03,458 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 72 [2020-12-21 21:20:03,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:03,460 INFO L225 Difference]: With dead ends: 413 [2020-12-21 21:20:03,460 INFO L226 Difference]: Without dead ends: 310 [2020-12-21 21:20:03,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2020-12-21 21:20:03,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-12-21 21:20:03,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 163. [2020-12-21 21:20:03,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-12-21 21:20:03,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 200 transitions. [2020-12-21 21:20:03,474 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 200 transitions. Word has length 72 [2020-12-21 21:20:03,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:03,474 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 200 transitions. [2020-12-21 21:20:03,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-21 21:20:03,475 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 200 transitions. [2020-12-21 21:20:03,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-21 21:20:03,476 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:03,476 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:03,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-21 21:20:03,690 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:03,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:03,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1244037695, now seen corresponding path program 11 times [2020-12-21 21:20:03,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:03,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332731445] [2020-12-21 21:20:03,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:03,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:03,914 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2020-12-21 21:20:03,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332731445] [2020-12-21 21:20:03,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110587406] [2020-12-21 21:20:03,915 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 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 21:20:04,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-12-21 21:20:04,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:04,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:20:04,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:05,137 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2020-12-21 21:20:05,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:05,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6] total 20 [2020-12-21 21:20:05,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962985670] [2020-12-21 21:20:05,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-21 21:20:05,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:05,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-21 21:20:05,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2020-12-21 21:20:05,140 INFO L87 Difference]: Start difference. First operand 163 states and 200 transitions. Second operand 20 states. [2020-12-21 21:20:06,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:06,293 INFO L93 Difference]: Finished difference Result 586 states and 711 transitions. [2020-12-21 21:20:06,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-21 21:20:06,293 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 82 [2020-12-21 21:20:06,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:06,296 INFO L225 Difference]: With dead ends: 586 [2020-12-21 21:20:06,296 INFO L226 Difference]: Without dead ends: 452 [2020-12-21 21:20:06,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1316, Invalid=2844, Unknown=0, NotChecked=0, Total=4160 [2020-12-21 21:20:06,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2020-12-21 21:20:06,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 172. [2020-12-21 21:20:06,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-12-21 21:20:06,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 209 transitions. [2020-12-21 21:20:06,316 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 209 transitions. Word has length 82 [2020-12-21 21:20:06,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:06,316 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 209 transitions. [2020-12-21 21:20:06,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-21 21:20:06,316 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 209 transitions. [2020-12-21 21:20:06,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-21 21:20:06,317 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:06,317 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 5, 5, 5, 5, 5, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:06,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-21 21:20:06,533 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:06,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:06,534 INFO L82 PathProgramCache]: Analyzing trace with hash -132874761, now seen corresponding path program 12 times [2020-12-21 21:20:06,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:06,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149813813] [2020-12-21 21:20:06,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:06,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:06,590 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-21 21:20:06,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149813813] [2020-12-21 21:20:06,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:20:06,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 21:20:06,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609806068] [2020-12-21 21:20:06,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 21:20:06,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:06,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 21:20:06,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:20:06,596 INFO L87 Difference]: Start difference. First operand 172 states and 209 transitions. Second operand 4 states. [2020-12-21 21:20:06,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:06,628 INFO L93 Difference]: Finished difference Result 280 states and 342 transitions. [2020-12-21 21:20:06,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:20:06,629 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-12-21 21:20:06,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:06,630 INFO L225 Difference]: With dead ends: 280 [2020-12-21 21:20:06,630 INFO L226 Difference]: Without dead ends: 193 [2020-12-21 21:20:06,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:20:06,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-12-21 21:20:06,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 168. [2020-12-21 21:20:06,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-12-21 21:20:06,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 194 transitions. [2020-12-21 21:20:06,651 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 194 transitions. Word has length 84 [2020-12-21 21:20:06,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:06,652 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 194 transitions. [2020-12-21 21:20:06,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 21:20:06,654 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 194 transitions. [2020-12-21 21:20:06,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-21 21:20:06,655 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:06,656 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:06,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-21 21:20:06,656 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:06,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:06,657 INFO L82 PathProgramCache]: Analyzing trace with hash -722374321, now seen corresponding path program 1 times [2020-12-21 21:20:06,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:06,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386702784] [2020-12-21 21:20:06,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:06,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:06,966 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-12-21 21:20:06,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386702784] [2020-12-21 21:20:06,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873918895] [2020-12-21 21:20:06,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:20:07,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:07,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 21:20:07,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:07,223 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-12-21 21:20:07,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:07,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-21 21:20:07,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264134077] [2020-12-21 21:20:07,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 21:20:07,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:07,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 21:20:07,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:20:07,225 INFO L87 Difference]: Start difference. First operand 168 states and 194 transitions. Second operand 18 states. [2020-12-21 21:20:07,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:07,404 INFO L93 Difference]: Finished difference Result 428 states and 495 transitions. [2020-12-21 21:20:07,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-21 21:20:07,405 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 87 [2020-12-21 21:20:07,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:07,406 INFO L225 Difference]: With dead ends: 428 [2020-12-21 21:20:07,407 INFO L226 Difference]: Without dead ends: 291 [2020-12-21 21:20:07,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:20:07,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-12-21 21:20:07,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 170. [2020-12-21 21:20:07,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-12-21 21:20:07,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 196 transitions. [2020-12-21 21:20:07,422 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 196 transitions. Word has length 87 [2020-12-21 21:20:07,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:07,422 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 196 transitions. [2020-12-21 21:20:07,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 21:20:07,422 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 196 transitions. [2020-12-21 21:20:07,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-21 21:20:07,423 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:07,423 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:07,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:07,638 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:07,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:07,639 INFO L82 PathProgramCache]: Analyzing trace with hash 2026940941, now seen corresponding path program 2 times [2020-12-21 21:20:07,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:07,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472932268] [2020-12-21 21:20:07,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:07,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:07,846 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-12-21 21:20:07,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472932268] [2020-12-21 21:20:07,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049086932] [2020-12-21 21:20:07,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:08,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:20:08,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:08,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-21 21:20:08,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:08,111 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-12-21 21:20:08,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:08,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-21 21:20:08,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227924948] [2020-12-21 21:20:08,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-21 21:20:08,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:08,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-21 21:20:08,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-21 21:20:08,113 INFO L87 Difference]: Start difference. First operand 170 states and 196 transitions. Second operand 19 states. [2020-12-21 21:20:08,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:08,314 INFO L93 Difference]: Finished difference Result 438 states and 506 transitions. [2020-12-21 21:20:08,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 21:20:08,315 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 89 [2020-12-21 21:20:08,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:08,317 INFO L225 Difference]: With dead ends: 438 [2020-12-21 21:20:08,317 INFO L226 Difference]: Without dead ends: 301 [2020-12-21 21:20:08,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-21 21:20:08,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-12-21 21:20:08,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 172. [2020-12-21 21:20:08,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-12-21 21:20:08,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 198 transitions. [2020-12-21 21:20:08,333 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 198 transitions. Word has length 89 [2020-12-21 21:20:08,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:08,334 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 198 transitions. [2020-12-21 21:20:08,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-21 21:20:08,334 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 198 transitions. [2020-12-21 21:20:08,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-21 21:20:08,335 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:08,336 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:08,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:08,549 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:08,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:08,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1580946613, now seen corresponding path program 3 times [2020-12-21 21:20:08,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:08,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23473141] [2020-12-21 21:20:08,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:08,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:08,812 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-12-21 21:20:08,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23473141] [2020-12-21 21:20:08,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510506919] [2020-12-21 21:20:08,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:08,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 21:20:08,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:08,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 62 conjunts are in the unsatisfiable core [2020-12-21 21:20:08,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:09,368 INFO L348 Elim1Store]: treesize reduction 38, result has 59.1 percent of original size [2020-12-21 21:20:09,369 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 70 [2020-12-21 21:20:09,373 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:20:09,378 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 21:20:09,418 INFO L625 ElimStorePlain]: treesize reduction 20, result has 75.0 percent of original size [2020-12-21 21:20:09,423 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 21:20:09,425 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 21:20:09,433 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:20:09,437 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-21 21:20:09,439 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-21 21:20:09,441 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 21:20:09,446 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-21 21:20:09,457 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:20:09,459 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-21 21:20:09,460 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:47, output treesize:60 [2020-12-21 21:20:09,463 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 21:20:09,464 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 21:20:09,467 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:20:09,469 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-21 21:20:09,471 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-21 21:20:09,473 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 21:20:09,476 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-21 21:20:09,484 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:20:09,548 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 21:20:09,549 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:20:09,552 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 21:20:09,555 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-21 21:20:09,557 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-21 21:20:09,559 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:20:09,563 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 21:20:09,567 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-21 21:20:14,963 WARN L197 SmtUtils]: Spent 5.26 s on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2020-12-21 21:20:15,158 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 4, 1] term [2020-12-21 21:20:15,158 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:20:15,168 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 21:20:15,171 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-21 21:20:15,183 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:20:15,193 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 21:20:15,196 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 21:20:15,198 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-21 21:20:15,208 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 21:20:15,268 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2020-12-21 21:20:15,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:15,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14] total 31 [2020-12-21 21:20:15,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283819633] [2020-12-21 21:20:15,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-21 21:20:15,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:15,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-21 21:20:15,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=681, Unknown=0, NotChecked=0, Total=930 [2020-12-21 21:20:15,271 INFO L87 Difference]: Start difference. First operand 172 states and 198 transitions. Second operand 31 states. [2020-12-21 21:20:18,755 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2020-12-21 21:20:18,932 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-12-21 21:20:19,135 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-12-21 21:20:19,286 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2020-12-21 21:20:23,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:23,304 INFO L93 Difference]: Finished difference Result 786 states and 933 transitions. [2020-12-21 21:20:23,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-21 21:20:23,305 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 91 [2020-12-21 21:20:23,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:23,308 INFO L225 Difference]: With dead ends: 786 [2020-12-21 21:20:23,309 INFO L226 Difference]: Without dead ends: 649 [2020-12-21 21:20:23,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1840 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=2284, Invalid=4687, Unknown=1, NotChecked=0, Total=6972 [2020-12-21 21:20:23,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2020-12-21 21:20:23,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 252. [2020-12-21 21:20:23,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-12-21 21:20:23,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 306 transitions. [2020-12-21 21:20:23,358 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 306 transitions. Word has length 91 [2020-12-21 21:20:23,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:23,359 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 306 transitions. [2020-12-21 21:20:23,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-21 21:20:23,359 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 306 transitions. [2020-12-21 21:20:23,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-21 21:20:23,360 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:23,360 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:23,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:23,575 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:23,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:23,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1860953295, now seen corresponding path program 1 times [2020-12-21 21:20:23,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:23,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063120087] [2020-12-21 21:20:23,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:23,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:23,839 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-12-21 21:20:23,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063120087] [2020-12-21 21:20:23,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330032299] [2020-12-21 21:20:23,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 21:20:23,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:23,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-21 21:20:23,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:24,063 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-12-21 21:20:24,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:24,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-21 21:20:24,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023401378] [2020-12-21 21:20:24,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-21 21:20:24,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:24,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-21 21:20:24,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-21 21:20:24,067 INFO L87 Difference]: Start difference. First operand 252 states and 306 transitions. Second operand 21 states. [2020-12-21 21:20:24,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:24,348 INFO L93 Difference]: Finished difference Result 614 states and 740 transitions. [2020-12-21 21:20:24,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-21 21:20:24,349 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 96 [2020-12-21 21:20:24,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:24,351 INFO L225 Difference]: With dead ends: 614 [2020-12-21 21:20:24,351 INFO L226 Difference]: Without dead ends: 399 [2020-12-21 21:20:24,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-21 21:20:24,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2020-12-21 21:20:24,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 254. [2020-12-21 21:20:24,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-12-21 21:20:24,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 308 transitions. [2020-12-21 21:20:24,390 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 308 transitions. Word has length 96 [2020-12-21 21:20:24,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:24,390 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 308 transitions. [2020-12-21 21:20:24,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-21 21:20:24,390 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 308 transitions. [2020-12-21 21:20:24,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-21 21:20:24,392 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:24,392 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:24,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-21 21:20:24,606 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:24,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:24,607 INFO L82 PathProgramCache]: Analyzing trace with hash 928372787, now seen corresponding path program 2 times [2020-12-21 21:20:24,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:24,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878805788] [2020-12-21 21:20:24,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:24,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:24,911 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-12-21 21:20:24,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878805788] [2020-12-21 21:20:24,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330769242] [2020-12-21 21:20:24,912 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 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 21:20:25,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:20:25,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:25,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-21 21:20:25,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:25,145 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-12-21 21:20:25,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:25,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-21 21:20:25,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8794614] [2020-12-21 21:20:25,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-21 21:20:25,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:25,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-21 21:20:25,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-21 21:20:25,147 INFO L87 Difference]: Start difference. First operand 254 states and 308 transitions. Second operand 22 states. [2020-12-21 21:20:25,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:25,445 INFO L93 Difference]: Finished difference Result 624 states and 751 transitions. [2020-12-21 21:20:25,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-21 21:20:25,446 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 98 [2020-12-21 21:20:25,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:25,448 INFO L225 Difference]: With dead ends: 624 [2020-12-21 21:20:25,448 INFO L226 Difference]: Without dead ends: 409 [2020-12-21 21:20:25,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-21 21:20:25,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2020-12-21 21:20:25,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 256. [2020-12-21 21:20:25,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-12-21 21:20:25,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 310 transitions. [2020-12-21 21:20:25,487 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 310 transitions. Word has length 98 [2020-12-21 21:20:25,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:25,488 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 310 transitions. [2020-12-21 21:20:25,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-21 21:20:25,488 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 310 transitions. [2020-12-21 21:20:25,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-21 21:20:25,489 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:25,490 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:25,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-21 21:20:25,703 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:25,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:25,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1411144885, now seen corresponding path program 3 times [2020-12-21 21:20:25,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:25,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725374259] [2020-12-21 21:20:25,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:25,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:26,047 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-12-21 21:20:26,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725374259] [2020-12-21 21:20:26,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52351489] [2020-12-21 21:20:26,047 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 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 21:20:26,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 21:20:26,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:26,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:20:26,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:26,284 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2020-12-21 21:20:26,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:26,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 6] total 26 [2020-12-21 21:20:26,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281510478] [2020-12-21 21:20:26,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-21 21:20:26,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:26,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-21 21:20:26,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2020-12-21 21:20:26,288 INFO L87 Difference]: Start difference. First operand 256 states and 310 transitions. Second operand 26 states. [2020-12-21 21:20:29,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:29,225 INFO L93 Difference]: Finished difference Result 805 states and 955 transitions. [2020-12-21 21:20:29,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2020-12-21 21:20:29,226 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 100 [2020-12-21 21:20:29,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:29,229 INFO L225 Difference]: With dead ends: 805 [2020-12-21 21:20:29,229 INFO L226 Difference]: Without dead ends: 549 [2020-12-21 21:20:29,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3488 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2964, Invalid=8378, Unknown=0, NotChecked=0, Total=11342 [2020-12-21 21:20:29,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2020-12-21 21:20:29,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 260. [2020-12-21 21:20:29,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-12-21 21:20:29,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 314 transitions. [2020-12-21 21:20:29,272 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 314 transitions. Word has length 100 [2020-12-21 21:20:29,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:29,273 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 314 transitions. [2020-12-21 21:20:29,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-21 21:20:29,273 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 314 transitions. [2020-12-21 21:20:29,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-21 21:20:29,274 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:29,274 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:29,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-21 21:20:29,490 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:29,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:29,491 INFO L82 PathProgramCache]: Analyzing trace with hash -176416939, now seen corresponding path program 4 times [2020-12-21 21:20:29,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:29,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303743402] [2020-12-21 21:20:29,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:29,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:29,863 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2020-12-21 21:20:29,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303743402] [2020-12-21 21:20:29,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875839019] [2020-12-21 21:20:29,864 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 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 21:20:29,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:20:29,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:29,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-21 21:20:29,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:30,101 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2020-12-21 21:20:30,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:30,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-21 21:20:30,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537182468] [2020-12-21 21:20:30,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-21 21:20:30,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:30,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-21 21:20:30,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-21 21:20:30,103 INFO L87 Difference]: Start difference. First operand 260 states and 314 transitions. Second operand 24 states. [2020-12-21 21:20:30,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:30,499 INFO L93 Difference]: Finished difference Result 669 states and 798 transitions. [2020-12-21 21:20:30,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-21 21:20:30,500 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 102 [2020-12-21 21:20:30,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:30,503 INFO L225 Difference]: With dead ends: 669 [2020-12-21 21:20:30,503 INFO L226 Difference]: Without dead ends: 452 [2020-12-21 21:20:30,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-21 21:20:30,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2020-12-21 21:20:30,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 262. [2020-12-21 21:20:30,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-12-21 21:20:30,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 316 transitions. [2020-12-21 21:20:30,547 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 316 transitions. Word has length 102 [2020-12-21 21:20:30,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:30,547 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 316 transitions. [2020-12-21 21:20:30,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-21 21:20:30,548 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 316 transitions. [2020-12-21 21:20:30,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-21 21:20:30,549 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:30,549 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:30,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-21 21:20:30,764 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:30,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:30,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1970763049, now seen corresponding path program 5 times [2020-12-21 21:20:30,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:30,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853260535] [2020-12-21 21:20:30,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:30,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:31,171 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2020-12-21 21:20:31,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853260535] [2020-12-21 21:20:31,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181243031] [2020-12-21 21:20:31,173 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 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 21:20:33,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2020-12-21 21:20:33,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:33,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 21:20:33,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:33,304 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 35 proven. 20 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2020-12-21 21:20:33,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:33,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 8] total 30 [2020-12-21 21:20:33,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117315744] [2020-12-21 21:20:33,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-21 21:20:33,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:33,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-21 21:20:33,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=580, Unknown=0, NotChecked=0, Total=870 [2020-12-21 21:20:33,306 INFO L87 Difference]: Start difference. First operand 262 states and 316 transitions. Second operand 30 states. [2020-12-21 21:20:36,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:36,239 INFO L93 Difference]: Finished difference Result 1146 states and 1318 transitions. [2020-12-21 21:20:36,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2020-12-21 21:20:36,240 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 104 [2020-12-21 21:20:36,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:36,244 INFO L225 Difference]: With dead ends: 1146 [2020-12-21 21:20:36,244 INFO L226 Difference]: Without dead ends: 929 [2020-12-21 21:20:36,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2909 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2461, Invalid=8251, Unknown=0, NotChecked=0, Total=10712 [2020-12-21 21:20:36,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2020-12-21 21:20:36,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 241. [2020-12-21 21:20:36,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-12-21 21:20:36,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 279 transitions. [2020-12-21 21:20:36,305 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 279 transitions. Word has length 104 [2020-12-21 21:20:36,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:36,305 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 279 transitions. [2020-12-21 21:20:36,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-21 21:20:36,305 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 279 transitions. [2020-12-21 21:20:36,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-21 21:20:36,306 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:36,307 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 5, 5, 5, 5, 5, 4, 3, 3, 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] [2020-12-21 21:20:36,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-21 21:20:36,522 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:36,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:36,523 INFO L82 PathProgramCache]: Analyzing trace with hash -67993979, now seen corresponding path program 1 times [2020-12-21 21:20:36,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:36,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96429680] [2020-12-21 21:20:36,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:36,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:36,981 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2020-12-21 21:20:36,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96429680] [2020-12-21 21:20:36,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069098383] [2020-12-21 21:20:36,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 21:20:37,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:37,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-21 21:20:37,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:37,223 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2020-12-21 21:20:37,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:37,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-21 21:20:37,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682924670] [2020-12-21 21:20:37,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-21 21:20:37,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:37,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-21 21:20:37,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-21 21:20:37,225 INFO L87 Difference]: Start difference. First operand 241 states and 279 transitions. Second operand 26 states. [2020-12-21 21:20:37,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:37,703 INFO L93 Difference]: Finished difference Result 645 states and 744 transitions. [2020-12-21 21:20:37,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-21 21:20:37,704 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 110 [2020-12-21 21:20:37,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:37,706 INFO L225 Difference]: With dead ends: 645 [2020-12-21 21:20:37,707 INFO L226 Difference]: Without dead ends: 451 [2020-12-21 21:20:37,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-21 21:20:37,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2020-12-21 21:20:37,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 243. [2020-12-21 21:20:37,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-12-21 21:20:37,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 281 transitions. [2020-12-21 21:20:37,753 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 281 transitions. Word has length 110 [2020-12-21 21:20:37,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:37,753 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 281 transitions. [2020-12-21 21:20:37,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-21 21:20:37,753 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 281 transitions. [2020-12-21 21:20:37,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-21 21:20:37,754 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:37,755 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 5, 5, 5, 5, 5, 4, 3, 3, 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] [2020-12-21 21:20:37,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:37,968 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:37,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:37,968 INFO L82 PathProgramCache]: Analyzing trace with hash -845393913, now seen corresponding path program 2 times [2020-12-21 21:20:37,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:37,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207077490] [2020-12-21 21:20:37,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:38,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:38,462 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2020-12-21 21:20:38,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207077490] [2020-12-21 21:20:38,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914172132] [2020-12-21 21:20:38,462 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 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 21:20:38,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:20:38,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:38,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-21 21:20:38,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:38,733 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2020-12-21 21:20:38,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:38,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-21 21:20:38,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644069968] [2020-12-21 21:20:38,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-21 21:20:38,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:38,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-21 21:20:38,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-21 21:20:38,736 INFO L87 Difference]: Start difference. First operand 243 states and 281 transitions. Second operand 27 states. [2020-12-21 21:20:39,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:39,301 INFO L93 Difference]: Finished difference Result 656 states and 756 transitions. [2020-12-21 21:20:39,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-21 21:20:39,302 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 112 [2020-12-21 21:20:39,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:39,304 INFO L225 Difference]: With dead ends: 656 [2020-12-21 21:20:39,304 INFO L226 Difference]: Without dead ends: 462 [2020-12-21 21:20:39,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-21 21:20:39,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2020-12-21 21:20:39,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 245. [2020-12-21 21:20:39,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-12-21 21:20:39,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 283 transitions. [2020-12-21 21:20:39,350 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 283 transitions. Word has length 112 [2020-12-21 21:20:39,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:39,350 INFO L481 AbstractCegarLoop]: Abstraction has 245 states and 283 transitions. [2020-12-21 21:20:39,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-21 21:20:39,351 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 283 transitions. [2020-12-21 21:20:39,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-21 21:20:39,352 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:39,352 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 5, 5, 5, 5, 5, 4, 3, 3, 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] [2020-12-21 21:20:39,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-21 21:20:39,567 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:39,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:39,568 INFO L82 PathProgramCache]: Analyzing trace with hash -602420983, now seen corresponding path program 3 times [2020-12-21 21:20:39,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:39,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478525259] [2020-12-21 21:20:39,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:39,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:40,045 INFO L134 CoverageAnalysis]: Checked inductivity of 674 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2020-12-21 21:20:40,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478525259] [2020-12-21 21:20:40,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274877443] [2020-12-21 21:20:40,046 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 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 21:20:40,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 21:20:40,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:40,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:20:40,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:40,403 INFO L134 CoverageAnalysis]: Checked inductivity of 674 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 669 trivial. 0 not checked. [2020-12-21 21:20:40,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:40,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 7] total 32 [2020-12-21 21:20:40,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429004190] [2020-12-21 21:20:40,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-21 21:20:40,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:40,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-21 21:20:40,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=629, Unknown=0, NotChecked=0, Total=992 [2020-12-21 21:20:40,406 INFO L87 Difference]: Start difference. First operand 245 states and 283 transitions. Second operand 32 states. [2020-12-21 21:20:48,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:48,134 INFO L93 Difference]: Finished difference Result 1036 states and 1164 transitions. [2020-12-21 21:20:48,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 182 states. [2020-12-21 21:20:48,134 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 114 [2020-12-21 21:20:48,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:48,138 INFO L225 Difference]: With dead ends: 1036 [2020-12-21 21:20:48,138 INFO L226 Difference]: Without dead ends: 766 [2020-12-21 21:20:48,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12027 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=7268, Invalid=26038, Unknown=0, NotChecked=0, Total=33306 [2020-12-21 21:20:48,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2020-12-21 21:20:48,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 255. [2020-12-21 21:20:48,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-12-21 21:20:48,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 294 transitions. [2020-12-21 21:20:48,207 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 294 transitions. Word has length 114 [2020-12-21 21:20:48,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:48,207 INFO L481 AbstractCegarLoop]: Abstraction has 255 states and 294 transitions. [2020-12-21 21:20:48,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-21 21:20:48,208 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 294 transitions. [2020-12-21 21:20:48,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-21 21:20:48,209 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:48,209 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:48,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-21 21:20:48,424 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:48,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:48,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1639302027, now seen corresponding path program 6 times [2020-12-21 21:20:48,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:48,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044458011] [2020-12-21 21:20:48,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:48,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:48,991 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-21 21:20:48,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044458011] [2020-12-21 21:20:48,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051240501] [2020-12-21 21:20:48,991 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 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 21:20:49,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-21 21:20:49,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:49,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 90 conjunts are in the unsatisfiable core [2020-12-21 21:20:49,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:49,843 INFO L348 Elim1Store]: treesize reduction 46, result has 57.0 percent of original size [2020-12-21 21:20:49,843 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 77 [2020-12-21 21:20:49,848 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:20:49,851 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 21:20:49,894 INFO L625 ElimStorePlain]: treesize reduction 22, result has 72.8 percent of original size [2020-12-21 21:20:49,895 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 21:20:49,897 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:20:49,898 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 21:20:49,901 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:20:49,902 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 21:20:49,905 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-21 21:20:49,905 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:59 [2020-12-21 21:20:49,907 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 21:20:49,908 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:20:49,909 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 21:20:49,911 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:20:49,912 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 21:20:49,991 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 21:20:49,992 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:20:49,992 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 21:20:49,998 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:20:49,999 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 21:21:05,983 WARN L197 SmtUtils]: Spent 15.83 s on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-12-21 21:21:19,795 WARN L197 SmtUtils]: Spent 13.52 s on a formula simplification that was a NOOP. DAG size: 65 [2020-12-21 21:21:48,461 WARN L197 SmtUtils]: Spent 26.50 s on a formula simplification that was a NOOP. DAG size: 66 [2020-12-21 21:21:49,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 21:21:49,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 21:21:49,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 21:21:49,159 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 21:21:49,160 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 52 treesize of output 114 [2020-12-21 21:21:49,165 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 21:21:49,286 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-12-21 21:21:49,287 INFO L625 ElimStorePlain]: treesize reduction 28, result has 76.9 percent of original size [2020-12-21 21:21:49,297 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:21:49,300 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:21:49,304 INFO L547 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-21 21:21:49,305 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:80, output treesize:27 [2020-12-21 21:21:49,743 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:21:49,746 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-21 21:21:49,920 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 51 proven. 26 refuted. 0 times theorem prover too weak. 665 trivial. 0 not checked. [2020-12-21 21:21:49,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:21:49,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 19] total 45 [2020-12-21 21:21:49,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778767940] [2020-12-21 21:21:49,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-21 21:21:49,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:21:49,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-21 21:21:49,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=1490, Unknown=1, NotChecked=0, Total=1980 [2020-12-21 21:21:49,924 INFO L87 Difference]: Start difference. First operand 255 states and 294 transitions. Second operand 45 states. [2020-12-21 21:22:07,255 WARN L197 SmtUtils]: Spent 15.19 s on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-12-21 21:22:39,850 WARN L197 SmtUtils]: Spent 32.51 s on a formula simplification. DAG size of input: 89 DAG size of output: 89 [2020-12-21 21:23:12,506 WARN L197 SmtUtils]: Spent 32.58 s on a formula simplification. DAG size of input: 91 DAG size of output: 91 [2020-12-21 21:23:47,628 WARN L197 SmtUtils]: Spent 32.72 s on a formula simplification. DAG size of input: 89 DAG size of output: 89 [2020-12-21 21:24:10,392 WARN L197 SmtUtils]: Spent 22.53 s on a formula simplification. DAG size of input: 92 DAG size of output: 60 [2020-12-21 21:24:14,584 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66