/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/combinations/pals_lcr.8.1.ufo.BOUNDED-16.pals+Problem12_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:19:50,850 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:19:50,854 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:19:50,912 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:19:50,912 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:19:50,917 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:19:50,921 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:19:50,930 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:19:50,934 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:19:50,941 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:19:50,943 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:19:50,944 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:19:50,945 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:19:50,948 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:19:50,950 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:19:50,952 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:19:50,954 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:19:50,958 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:19:50,965 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:19:50,971 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:19:50,973 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:19:50,976 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:19:50,978 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:19:50,979 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:19:50,999 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:19:51,010 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:19:51,011 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:19:51,012 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:19:51,013 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:19:51,065 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:19:51,065 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:19:51,072 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:19:51,072 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:19:51,072 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:19:51,073 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:19:51,073 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:19:51,073 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:19:51,073 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:19:51,074 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:19:51,075 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:19:51,075 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:19:51,076 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:19:51,076 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:19:51,076 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:19:51,076 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:19:51,076 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:19:51,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:19:51,077 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:19:51,077 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:19:51,077 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:19:51,078 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:19:51,078 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:19:51,078 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:19:51,078 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:19:51,078 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:19:51,502 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:19:51,530 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:19:51,533 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:19:51,535 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:19:51,535 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:19:51,536 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.8.1.ufo.BOUNDED-16.pals+Problem12_label09.c [2020-12-22 10:19:51,618 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d103663e6/c663c00c19884f8e842913e3e64d845b/FLAGd8bad511b [2020-12-22 10:19:52,750 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:19:52,751 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.8.1.ufo.BOUNDED-16.pals+Problem12_label09.c [2020-12-22 10:19:52,797 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d103663e6/c663c00c19884f8e842913e3e64d845b/FLAGd8bad511b [2020-12-22 10:19:53,175 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d103663e6/c663c00c19884f8e842913e3e64d845b [2020-12-22 10:19:53,178 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:19:53,182 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:19:53,184 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:19:53,185 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:19:53,189 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:19:53,190 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:19:53" (1/1) ... [2020-12-22 10:19:53,193 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20db5ca1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:53, skipping insertion in model container [2020-12-22 10:19:53,193 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:19:53" (1/1) ... [2020-12-22 10:19:53,202 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:19:53,434 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:19:53,978 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/combinations/pals_lcr.8.1.ufo.BOUNDED-16.pals+Problem12_label09.c[26884,26897] [2020-12-22 10:19:54,053 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/combinations/pals_lcr.8.1.ufo.BOUNDED-16.pals+Problem12_label09.c[34389,34402] [2020-12-22 10:19:55,058 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:19:55,161 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:19:55,207 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/combinations/pals_lcr.8.1.ufo.BOUNDED-16.pals+Problem12_label09.c[26884,26897] [2020-12-22 10:19:55,222 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/combinations/pals_lcr.8.1.ufo.BOUNDED-16.pals+Problem12_label09.c[34389,34402] [2020-12-22 10:19:55,834 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:19:55,882 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:19:55,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:55 WrapperNode [2020-12-22 10:19:55,885 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:19:55,886 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:19:55,886 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:19:55,886 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:19:55,895 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:55" (1/1) ... [2020-12-22 10:19:55,964 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:55" (1/1) ... [2020-12-22 10:19:56,379 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:19:56,381 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:19:56,381 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:19:56,381 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:19:56,391 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:55" (1/1) ... [2020-12-22 10:19:56,392 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:55" (1/1) ... [2020-12-22 10:19:56,477 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:55" (1/1) ... [2020-12-22 10:19:56,477 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:55" (1/1) ... [2020-12-22 10:19:56,712 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:55" (1/1) ... [2020-12-22 10:19:56,746 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:55" (1/1) ... [2020-12-22 10:19:56,806 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:55" (1/1) ... [2020-12-22 10:19:56,963 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:19:56,966 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:19:56,966 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:19:56,966 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:19:56,968 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:19:57,082 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:19:57,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:19:57,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:19:57,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:20:03,130 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:20:03,131 INFO L299 CfgBuilder]: Removed 42 assume(true) statements. [2020-12-22 10:20:03,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:20:03 BoogieIcfgContainer [2020-12-22 10:20:03,134 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:20:03,136 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:20:03,136 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:20:03,139 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:20:03,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:19:53" (1/3) ... [2020-12-22 10:20:03,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38df39e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:20:03, skipping insertion in model container [2020-12-22 10:20:03,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:55" (2/3) ... [2020-12-22 10:20:03,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38df39e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:20:03, skipping insertion in model container [2020-12-22 10:20:03,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:20:03" (3/3) ... [2020-12-22 10:20:03,143 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.1.ufo.BOUNDED-16.pals+Problem12_label09.c [2020-12-22 10:20:03,149 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:20:03,155 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:20:03,174 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:20:03,207 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:20:03,207 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:20:03,207 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:20:03,207 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:20:03,207 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:20:03,208 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:20:03,208 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:20:03,208 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:20:03,315 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states. [2020-12-22 10:20:03,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 10:20:03,326 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:03,327 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:20:03,327 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:03,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:03,337 INFO L82 PathProgramCache]: Analyzing trace with hash -2107180874, now seen corresponding path program 1 times [2020-12-22 10:20:03,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:03,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638490550] [2020-12-22 10:20:03,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:03,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:03,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:20:03,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638490550] [2020-12-22 10:20:03,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:03,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:20:03,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210610957] [2020-12-22 10:20:03,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 10:20:03,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:03,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 10:20:03,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:20:03,806 INFO L87 Difference]: Start difference. First operand 963 states. Second operand 2 states. [2020-12-22 10:20:03,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:03,910 INFO L93 Difference]: Finished difference Result 1859 states and 3512 transitions. [2020-12-22 10:20:03,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 10:20:03,912 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 46 [2020-12-22 10:20:03,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:03,941 INFO L225 Difference]: With dead ends: 1859 [2020-12-22 10:20:03,942 INFO L226 Difference]: Without dead ends: 897 [2020-12-22 10:20:03,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:20:03,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2020-12-22 10:20:04,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 897. [2020-12-22 10:20:04,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 897 states. [2020-12-22 10:20:04,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1688 transitions. [2020-12-22 10:20:04,066 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1688 transitions. Word has length 46 [2020-12-22 10:20:04,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:04,066 INFO L481 AbstractCegarLoop]: Abstraction has 897 states and 1688 transitions. [2020-12-22 10:20:04,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 10:20:04,067 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1688 transitions. [2020-12-22 10:20:04,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 10:20:04,069 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:04,069 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:20:04,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:20:04,070 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:04,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:04,071 INFO L82 PathProgramCache]: Analyzing trace with hash 815979124, now seen corresponding path program 1 times [2020-12-22 10:20:04,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:04,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142495202] [2020-12-22 10:20:04,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:04,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:04,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:20:04,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142495202] [2020-12-22 10:20:04,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:04,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:20:04,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144411880] [2020-12-22 10:20:04,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:20:04,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:04,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:20:04,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:20:04,265 INFO L87 Difference]: Start difference. First operand 897 states and 1688 transitions. Second operand 5 states. [2020-12-22 10:20:04,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:04,545 INFO L93 Difference]: Finished difference Result 977 states and 1813 transitions. [2020-12-22 10:20:04,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:20:04,546 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-12-22 10:20:04,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:04,551 INFO L225 Difference]: With dead ends: 977 [2020-12-22 10:20:04,551 INFO L226 Difference]: Without dead ends: 897 [2020-12-22 10:20:04,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:20:04,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2020-12-22 10:20:04,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 897. [2020-12-22 10:20:04,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 897 states. [2020-12-22 10:20:04,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1627 transitions. [2020-12-22 10:20:04,579 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1627 transitions. Word has length 46 [2020-12-22 10:20:04,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:04,579 INFO L481 AbstractCegarLoop]: Abstraction has 897 states and 1627 transitions. [2020-12-22 10:20:04,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:20:04,580 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1627 transitions. [2020-12-22 10:20:04,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 10:20:04,590 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:04,591 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:20:04,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:20:04,592 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:04,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:04,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1554106476, now seen corresponding path program 1 times [2020-12-22 10:20:04,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:04,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434850890] [2020-12-22 10:20:04,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:04,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:04,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:20:04,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434850890] [2020-12-22 10:20:04,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:04,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:20:04,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061825543] [2020-12-22 10:20:04,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:20:04,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:04,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:20:04,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:20:04,845 INFO L87 Difference]: Start difference. First operand 897 states and 1627 transitions. Second operand 4 states. [2020-12-22 10:20:16,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:16,305 INFO L93 Difference]: Finished difference Result 3152 states and 5936 transitions. [2020-12-22 10:20:16,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:20:16,307 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-12-22 10:20:16,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:16,322 INFO L225 Difference]: With dead ends: 3152 [2020-12-22 10:20:16,322 INFO L226 Difference]: Without dead ends: 2399 [2020-12-22 10:20:16,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:20:16,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2399 states. [2020-12-22 10:20:16,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2399 to 2399. [2020-12-22 10:20:16,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2399 states. [2020-12-22 10:20:16,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2399 states to 2399 states and 3603 transitions. [2020-12-22 10:20:16,384 INFO L78 Accepts]: Start accepts. Automaton has 2399 states and 3603 transitions. Word has length 67 [2020-12-22 10:20:16,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:16,385 INFO L481 AbstractCegarLoop]: Abstraction has 2399 states and 3603 transitions. [2020-12-22 10:20:16,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:20:16,385 INFO L276 IsEmpty]: Start isEmpty. Operand 2399 states and 3603 transitions. [2020-12-22 10:20:16,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:20:16,387 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:16,387 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:20:16,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:20:16,388 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:16,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:16,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1090783836, now seen corresponding path program 1 times [2020-12-22 10:20:16,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:16,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114993332] [2020-12-22 10:20:16,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:16,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:16,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:20:16,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114993332] [2020-12-22 10:20:16,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:16,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:20:16,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086518453] [2020-12-22 10:20:16,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:20:16,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:16,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:20:16,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:20:16,562 INFO L87 Difference]: Start difference. First operand 2399 states and 3603 transitions. Second operand 3 states. [2020-12-22 10:20:16,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:16,615 INFO L93 Difference]: Finished difference Result 2545 states and 3835 transitions. [2020-12-22 10:20:16,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:20:16,616 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:20:16,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:16,633 INFO L225 Difference]: With dead ends: 2545 [2020-12-22 10:20:16,633 INFO L226 Difference]: Without dead ends: 2469 [2020-12-22 10:20:16,634 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 [2020-12-22 10:20:16,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2469 states. [2020-12-22 10:20:16,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2469 to 2467. [2020-12-22 10:20:16,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2467 states. [2020-12-22 10:20:16,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2467 states to 2467 states and 3712 transitions. [2020-12-22 10:20:16,695 INFO L78 Accepts]: Start accepts. Automaton has 2467 states and 3712 transitions. Word has length 106 [2020-12-22 10:20:16,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:16,696 INFO L481 AbstractCegarLoop]: Abstraction has 2467 states and 3712 transitions. [2020-12-22 10:20:16,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:20:16,696 INFO L276 IsEmpty]: Start isEmpty. Operand 2467 states and 3712 transitions. [2020-12-22 10:20:16,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:20:16,697 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:16,698 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:20:16,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:20:16,698 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:16,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:16,699 INFO L82 PathProgramCache]: Analyzing trace with hash 326222874, now seen corresponding path program 1 times [2020-12-22 10:20:16,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:16,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539656826] [2020-12-22 10:20:16,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:16,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:16,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:20:16,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539656826] [2020-12-22 10:20:16,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:16,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:20:16,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17625864] [2020-12-22 10:20:16,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:20:16,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:16,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:20:16,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:20:16,811 INFO L87 Difference]: Start difference. First operand 2467 states and 3712 transitions. Second operand 3 states. [2020-12-22 10:20:16,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:16,864 INFO L93 Difference]: Finished difference Result 2743 states and 4152 transitions. [2020-12-22 10:20:16,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:20:16,865 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:20:16,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:16,879 INFO L225 Difference]: With dead ends: 2743 [2020-12-22 10:20:16,880 INFO L226 Difference]: Without dead ends: 2599 [2020-12-22 10:20:16,881 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 [2020-12-22 10:20:16,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2599 states. [2020-12-22 10:20:16,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2599 to 2597. [2020-12-22 10:20:16,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2597 states. [2020-12-22 10:20:16,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2597 states to 2597 states and 3919 transitions. [2020-12-22 10:20:16,948 INFO L78 Accepts]: Start accepts. Automaton has 2597 states and 3919 transitions. Word has length 106 [2020-12-22 10:20:16,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:16,949 INFO L481 AbstractCegarLoop]: Abstraction has 2597 states and 3919 transitions. [2020-12-22 10:20:16,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:20:16,949 INFO L276 IsEmpty]: Start isEmpty. Operand 2597 states and 3919 transitions. [2020-12-22 10:20:16,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:20:16,951 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:16,951 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:20:16,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:20:16,951 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:16,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:16,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1573731728, now seen corresponding path program 1 times [2020-12-22 10:20:16,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:16,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769726985] [2020-12-22 10:20:16,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:16,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:17,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:20:17,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769726985] [2020-12-22 10:20:17,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:17,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:20:17,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519124507] [2020-12-22 10:20:17,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:20:17,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:17,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:20:17,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:20:17,053 INFO L87 Difference]: Start difference. First operand 2597 states and 3919 transitions. Second operand 3 states. [2020-12-22 10:20:17,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:17,118 INFO L93 Difference]: Finished difference Result 3121 states and 4753 transitions. [2020-12-22 10:20:17,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:20:17,119 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:20:17,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:17,134 INFO L225 Difference]: With dead ends: 3121 [2020-12-22 10:20:17,134 INFO L226 Difference]: Without dead ends: 2847 [2020-12-22 10:20:17,136 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 [2020-12-22 10:20:17,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2847 states. [2020-12-22 10:20:17,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2847 to 2845. [2020-12-22 10:20:17,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2845 states. [2020-12-22 10:20:17,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2845 states to 2845 states and 4311 transitions. [2020-12-22 10:20:17,214 INFO L78 Accepts]: Start accepts. Automaton has 2845 states and 4311 transitions. Word has length 106 [2020-12-22 10:20:17,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:17,215 INFO L481 AbstractCegarLoop]: Abstraction has 2845 states and 4311 transitions. [2020-12-22 10:20:17,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:20:17,215 INFO L276 IsEmpty]: Start isEmpty. Operand 2845 states and 4311 transitions. [2020-12-22 10:20:17,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:20:17,217 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:17,217 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:20:17,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:20:17,218 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:17,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:17,218 INFO L82 PathProgramCache]: Analyzing trace with hash 832299526, now seen corresponding path program 1 times [2020-12-22 10:20:17,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:17,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361673945] [2020-12-22 10:20:17,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:17,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:17,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:20:17,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361673945] [2020-12-22 10:20:17,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:17,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:20:17,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720748958] [2020-12-22 10:20:17,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:20:17,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:17,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:20:17,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:20:17,342 INFO L87 Difference]: Start difference. First operand 2845 states and 4311 transitions. Second operand 3 states. [2020-12-22 10:20:17,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:17,438 INFO L93 Difference]: Finished difference Result 3841 states and 5889 transitions. [2020-12-22 10:20:17,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:20:17,439 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:20:17,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:17,459 INFO L225 Difference]: With dead ends: 3841 [2020-12-22 10:20:17,460 INFO L226 Difference]: Without dead ends: 3319 [2020-12-22 10:20:17,462 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 [2020-12-22 10:20:17,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3319 states. [2020-12-22 10:20:17,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3319 to 3317. [2020-12-22 10:20:17,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3317 states. [2020-12-22 10:20:17,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3317 states to 3317 states and 5051 transitions. [2020-12-22 10:20:17,585 INFO L78 Accepts]: Start accepts. Automaton has 3317 states and 5051 transitions. Word has length 106 [2020-12-22 10:20:17,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:17,586 INFO L481 AbstractCegarLoop]: Abstraction has 3317 states and 5051 transitions. [2020-12-22 10:20:17,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:20:17,587 INFO L276 IsEmpty]: Start isEmpty. Operand 3317 states and 5051 transitions. [2020-12-22 10:20:17,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:20:17,588 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:17,588 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:20:17,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:20:17,589 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:17,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:17,590 INFO L82 PathProgramCache]: Analyzing trace with hash 2050284924, now seen corresponding path program 1 times [2020-12-22 10:20:17,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:17,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598855061] [2020-12-22 10:20:17,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:17,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:17,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:20:17,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598855061] [2020-12-22 10:20:17,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:17,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:20:17,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446024325] [2020-12-22 10:20:17,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:20:17,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:17,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:20:17,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:20:17,857 INFO L87 Difference]: Start difference. First operand 3317 states and 5051 transitions. Second operand 10 states. [2020-12-22 10:20:19,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:19,178 INFO L93 Difference]: Finished difference Result 19221 states and 30155 transitions. [2020-12-22 10:20:19,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 10:20:19,179 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 106 [2020-12-22 10:20:19,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:19,267 INFO L225 Difference]: With dead ends: 19221 [2020-12-22 10:20:19,267 INFO L226 Difference]: Without dead ends: 18227 [2020-12-22 10:20:19,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-12-22 10:20:19,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18227 states. [2020-12-22 10:20:19,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18227 to 4309. [2020-12-22 10:20:19,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4309 states. [2020-12-22 10:20:19,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4309 states to 4309 states and 6587 transitions. [2020-12-22 10:20:19,653 INFO L78 Accepts]: Start accepts. Automaton has 4309 states and 6587 transitions. Word has length 106 [2020-12-22 10:20:19,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:19,654 INFO L481 AbstractCegarLoop]: Abstraction has 4309 states and 6587 transitions. [2020-12-22 10:20:19,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:20:19,654 INFO L276 IsEmpty]: Start isEmpty. Operand 4309 states and 6587 transitions. [2020-12-22 10:20:19,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:20:19,659 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:19,659 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:20:19,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:20:19,659 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:19,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:19,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1813103660, now seen corresponding path program 1 times [2020-12-22 10:20:19,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:19,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619268354] [2020-12-22 10:20:19,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:19,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:19,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:20:19,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619268354] [2020-12-22 10:20:19,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:19,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:20:19,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523651872] [2020-12-22 10:20:19,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:20:19,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:19,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:20:19,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:20:19,791 INFO L87 Difference]: Start difference. First operand 4309 states and 6587 transitions. Second operand 3 states. [2020-12-22 10:20:20,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:20,042 INFO L93 Difference]: Finished difference Result 7251 states and 11183 transitions. [2020-12-22 10:20:20,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:20:20,043 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:20:20,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:20,059 INFO L225 Difference]: With dead ends: 7251 [2020-12-22 10:20:20,060 INFO L226 Difference]: Without dead ends: 5265 [2020-12-22 10:20:20,066 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 [2020-12-22 10:20:20,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5265 states. [2020-12-22 10:20:20,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5265 to 5263. [2020-12-22 10:20:20,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5263 states. [2020-12-22 10:20:20,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5263 states to 5263 states and 8053 transitions. [2020-12-22 10:20:20,364 INFO L78 Accepts]: Start accepts. Automaton has 5263 states and 8053 transitions. Word has length 108 [2020-12-22 10:20:20,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:20,364 INFO L481 AbstractCegarLoop]: Abstraction has 5263 states and 8053 transitions. [2020-12-22 10:20:20,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:20:20,365 INFO L276 IsEmpty]: Start isEmpty. Operand 5263 states and 8053 transitions. [2020-12-22 10:20:20,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:20:20,366 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:20,366 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:20:20,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:20:20,367 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:20,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:20,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1879597172, now seen corresponding path program 1 times [2020-12-22 10:20:20,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:20,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32403480] [2020-12-22 10:20:20,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:20,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:20,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:20:20,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32403480] [2020-12-22 10:20:20,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:20,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:20:20,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396792636] [2020-12-22 10:20:20,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:20:20,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:20,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:20:20,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:20:20,849 INFO L87 Difference]: Start difference. First operand 5263 states and 8053 transitions. Second operand 10 states. [2020-12-22 10:20:21,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:21,715 INFO L93 Difference]: Finished difference Result 8203 states and 12623 transitions. [2020-12-22 10:20:21,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:20:21,720 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 108 [2020-12-22 10:20:21,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:21,734 INFO L225 Difference]: With dead ends: 8203 [2020-12-22 10:20:21,734 INFO L226 Difference]: Without dead ends: 5265 [2020-12-22 10:20:21,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:20:21,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5265 states. [2020-12-22 10:20:22,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5265 to 5263. [2020-12-22 10:20:22,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5263 states. [2020-12-22 10:20:22,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5263 states to 5263 states and 8029 transitions. [2020-12-22 10:20:22,122 INFO L78 Accepts]: Start accepts. Automaton has 5263 states and 8029 transitions. Word has length 108 [2020-12-22 10:20:22,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:22,123 INFO L481 AbstractCegarLoop]: Abstraction has 5263 states and 8029 transitions. [2020-12-22 10:20:22,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:20:22,123 INFO L276 IsEmpty]: Start isEmpty. Operand 5263 states and 8029 transitions. [2020-12-22 10:20:22,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:20:22,124 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:22,125 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:20:22,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:20:22,125 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:22,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:22,126 INFO L82 PathProgramCache]: Analyzing trace with hash 621051568, now seen corresponding path program 1 times [2020-12-22 10:20:22,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:22,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300079647] [2020-12-22 10:20:22,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:22,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:22,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:20:22,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300079647] [2020-12-22 10:20:22,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:22,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:20:22,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957482014] [2020-12-22 10:20:22,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:20:22,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:22,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:20:22,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:20:22,214 INFO L87 Difference]: Start difference. First operand 5263 states and 8029 transitions. Second operand 3 states. [2020-12-22 10:20:22,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:22,562 INFO L93 Difference]: Finished difference Result 10851 states and 16639 transitions. [2020-12-22 10:20:22,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:20:22,562 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:20:22,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:22,581 INFO L225 Difference]: With dead ends: 10851 [2020-12-22 10:20:22,581 INFO L226 Difference]: Without dead ends: 7913 [2020-12-22 10:20:22,588 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 [2020-12-22 10:20:22,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7913 states. [2020-12-22 10:20:23,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7913 to 7911. [2020-12-22 10:20:23,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7911 states. [2020-12-22 10:20:23,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7911 states to 7911 states and 12045 transitions. [2020-12-22 10:20:23,048 INFO L78 Accepts]: Start accepts. Automaton has 7911 states and 12045 transitions. Word has length 108 [2020-12-22 10:20:23,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:23,049 INFO L481 AbstractCegarLoop]: Abstraction has 7911 states and 12045 transitions. [2020-12-22 10:20:23,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:20:23,049 INFO L276 IsEmpty]: Start isEmpty. Operand 7911 states and 12045 transitions. [2020-12-22 10:20:23,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:20:23,050 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:23,051 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:20:23,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:20:23,053 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:23,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:23,053 INFO L82 PathProgramCache]: Analyzing trace with hash 894739280, now seen corresponding path program 1 times [2020-12-22 10:20:23,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:23,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119231222] [2020-12-22 10:20:23,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:23,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:23,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:20:23,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119231222] [2020-12-22 10:20:23,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:23,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:20:23,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130295753] [2020-12-22 10:20:23,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:20:23,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:23,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:20:23,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:20:23,148 INFO L87 Difference]: Start difference. First operand 7911 states and 12045 transitions. Second operand 3 states. [2020-12-22 10:20:23,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:23,941 INFO L93 Difference]: Finished difference Result 18507 states and 28207 transitions. [2020-12-22 10:20:23,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:20:23,942 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:20:23,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:23,976 INFO L225 Difference]: With dead ends: 18507 [2020-12-22 10:20:23,977 INFO L226 Difference]: Without dead ends: 12921 [2020-12-22 10:20:23,987 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 [2020-12-22 10:20:24,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12921 states. [2020-12-22 10:20:24,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12921 to 12919. [2020-12-22 10:20:24,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12919 states. [2020-12-22 10:20:24,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12919 states to 12919 states and 19549 transitions. [2020-12-22 10:20:24,925 INFO L78 Accepts]: Start accepts. Automaton has 12919 states and 19549 transitions. Word has length 108 [2020-12-22 10:20:24,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:24,925 INFO L481 AbstractCegarLoop]: Abstraction has 12919 states and 19549 transitions. [2020-12-22 10:20:24,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:20:24,925 INFO L276 IsEmpty]: Start isEmpty. Operand 12919 states and 19549 transitions. [2020-12-22 10:20:24,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:20:24,927 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:24,927 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:20:24,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:20:24,927 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:24,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:24,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1581156368, now seen corresponding path program 1 times [2020-12-22 10:20:24,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:24,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317721659] [2020-12-22 10:20:24,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:24,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:25,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:20:25,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317721659] [2020-12-22 10:20:25,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:25,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:20:25,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928883240] [2020-12-22 10:20:25,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:20:25,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:25,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:20:25,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:20:25,024 INFO L87 Difference]: Start difference. First operand 12919 states and 19549 transitions. Second operand 3 states. [2020-12-22 10:20:26,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:26,525 INFO L93 Difference]: Finished difference Result 32955 states and 49759 transitions. [2020-12-22 10:20:26,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:20:26,526 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:20:26,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:26,584 INFO L225 Difference]: With dead ends: 32955 [2020-12-22 10:20:26,584 INFO L226 Difference]: Without dead ends: 22361 [2020-12-22 10:20:26,604 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 [2020-12-22 10:20:26,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22361 states. [2020-12-22 10:20:28,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22361 to 22359. [2020-12-22 10:20:28,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22359 states. [2020-12-22 10:20:28,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22359 states to 22359 states and 33501 transitions. [2020-12-22 10:20:28,154 INFO L78 Accepts]: Start accepts. Automaton has 22359 states and 33501 transitions. Word has length 108 [2020-12-22 10:20:28,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:28,155 INFO L481 AbstractCegarLoop]: Abstraction has 22359 states and 33501 transitions. [2020-12-22 10:20:28,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:20:28,156 INFO L276 IsEmpty]: Start isEmpty. Operand 22359 states and 33501 transitions. [2020-12-22 10:20:28,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:20:28,158 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:28,158 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:20:28,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:20:28,159 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:28,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:28,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1401750384, now seen corresponding path program 1 times [2020-12-22 10:20:28,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:28,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577137583] [2020-12-22 10:20:28,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:28,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:28,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:20:28,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577137583] [2020-12-22 10:20:28,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:28,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:20:28,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854864585] [2020-12-22 10:20:28,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:20:28,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:28,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:20:28,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:20:28,400 INFO L87 Difference]: Start difference. First operand 22359 states and 33501 transitions. Second operand 3 states. [2020-12-22 10:20:30,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:30,753 INFO L93 Difference]: Finished difference Result 60123 states and 89695 transitions. [2020-12-22 10:20:30,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:20:30,754 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:20:30,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:30,840 INFO L225 Difference]: With dead ends: 60123 [2020-12-22 10:20:30,841 INFO L226 Difference]: Without dead ends: 40089 [2020-12-22 10:20:30,868 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 [2020-12-22 10:20:30,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40089 states. [2020-12-22 10:20:33,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40089 to 40087. [2020-12-22 10:20:33,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40087 states. [2020-12-22 10:20:33,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40087 states to 40087 states and 59293 transitions. [2020-12-22 10:20:33,761 INFO L78 Accepts]: Start accepts. Automaton has 40087 states and 59293 transitions. Word has length 108 [2020-12-22 10:20:33,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:33,761 INFO L481 AbstractCegarLoop]: Abstraction has 40087 states and 59293 transitions. [2020-12-22 10:20:33,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:20:33,762 INFO L276 IsEmpty]: Start isEmpty. Operand 40087 states and 59293 transitions. [2020-12-22 10:20:33,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 10:20:33,763 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:33,763 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:20:33,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:20:33,764 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:33,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:33,764 INFO L82 PathProgramCache]: Analyzing trace with hash 2018214719, now seen corresponding path program 1 times [2020-12-22 10:20:33,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:33,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604793956] [2020-12-22 10:20:33,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:33,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:33,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:20:33,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604793956] [2020-12-22 10:20:33,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:33,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:20:33,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784364807] [2020-12-22 10:20:33,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:20:33,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:33,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:20:33,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:20:33,913 INFO L87 Difference]: Start difference. First operand 40087 states and 59293 transitions. Second operand 8 states. [2020-12-22 10:20:38,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:38,360 INFO L93 Difference]: Finished difference Result 72254 states and 105870 transitions. [2020-12-22 10:20:38,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:20:38,362 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 109 [2020-12-22 10:20:38,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:38,488 INFO L225 Difference]: With dead ends: 72254 [2020-12-22 10:20:38,488 INFO L226 Difference]: Without dead ends: 72252 [2020-12-22 10:20:38,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:20:38,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72252 states. [2020-12-22 10:20:41,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72252 to 41623. [2020-12-22 10:20:41,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41623 states. [2020-12-22 10:20:41,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41623 states to 41623 states and 60701 transitions. [2020-12-22 10:20:41,714 INFO L78 Accepts]: Start accepts. Automaton has 41623 states and 60701 transitions. Word has length 109 [2020-12-22 10:20:41,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:41,714 INFO L481 AbstractCegarLoop]: Abstraction has 41623 states and 60701 transitions. [2020-12-22 10:20:41,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:20:41,715 INFO L276 IsEmpty]: Start isEmpty. Operand 41623 states and 60701 transitions. [2020-12-22 10:20:41,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 10:20:41,722 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:41,722 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:20:41,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:20:41,722 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:41,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:41,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1704936525, now seen corresponding path program 1 times [2020-12-22 10:20:41,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:41,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737952210] [2020-12-22 10:20:41,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:41,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:41,940 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:20:41,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737952210] [2020-12-22 10:20:41,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:41,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:20:41,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804505306] [2020-12-22 10:20:41,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:20:41,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:41,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:20:41,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:20:41,945 INFO L87 Difference]: Start difference. First operand 41623 states and 60701 transitions. Second operand 4 states. [2020-12-22 10:20:52,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:52,470 INFO L93 Difference]: Finished difference Result 45417 states and 66806 transitions. [2020-12-22 10:20:52,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:20:52,471 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2020-12-22 10:20:52,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:52,567 INFO L225 Difference]: With dead ends: 45417 [2020-12-22 10:20:52,568 INFO L226 Difference]: Without dead ends: 43125 [2020-12-22 10:20:52,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:20:52,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43125 states. [2020-12-22 10:20:55,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43125 to 43125. [2020-12-22 10:20:55,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43125 states. [2020-12-22 10:20:55,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43125 states to 43125 states and 62286 transitions. [2020-12-22 10:20:55,415 INFO L78 Accepts]: Start accepts. Automaton has 43125 states and 62286 transitions. Word has length 138 [2020-12-22 10:20:55,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:55,416 INFO L481 AbstractCegarLoop]: Abstraction has 43125 states and 62286 transitions. [2020-12-22 10:20:55,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:20:55,416 INFO L276 IsEmpty]: Start isEmpty. Operand 43125 states and 62286 transitions. [2020-12-22 10:20:55,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 10:20:55,439 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:55,440 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:20:55,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:20:55,440 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:55,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:55,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1243757929, now seen corresponding path program 1 times [2020-12-22 10:20:55,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:55,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850997305] [2020-12-22 10:20:55,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:55,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:55,657 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-22 10:20:55,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850997305] [2020-12-22 10:20:55,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:55,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:20:55,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054339712] [2020-12-22 10:20:55,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:20:55,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:55,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:20:55,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:20:55,660 INFO L87 Difference]: Start difference. First operand 43125 states and 62286 transitions. Second operand 10 states. [2020-12-22 10:21:14,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:14,193 INFO L93 Difference]: Finished difference Result 365063 states and 530583 transitions. [2020-12-22 10:21:14,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:21:14,194 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 149 [2020-12-22 10:21:14,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:15,046 INFO L225 Difference]: With dead ends: 365063 [2020-12-22 10:21:15,047 INFO L226 Difference]: Without dead ends: 325765 [2020-12-22 10:21:15,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:21:15,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325765 states. [2020-12-22 10:21:23,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325765 to 82421. [2020-12-22 10:21:23,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82421 states. [2020-12-22 10:21:23,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82421 states to 82421 states and 119118 transitions. [2020-12-22 10:21:23,348 INFO L78 Accepts]: Start accepts. Automaton has 82421 states and 119118 transitions. Word has length 149 [2020-12-22 10:21:23,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:23,348 INFO L481 AbstractCegarLoop]: Abstraction has 82421 states and 119118 transitions. [2020-12-22 10:21:23,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:21:23,348 INFO L276 IsEmpty]: Start isEmpty. Operand 82421 states and 119118 transitions. [2020-12-22 10:21:23,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 10:21:23,383 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:23,384 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:21:23,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:21:23,384 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:23,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:23,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1273280147, now seen corresponding path program 1 times [2020-12-22 10:21:23,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:23,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660156101] [2020-12-22 10:21:23,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:23,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:23,614 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 10:21:23,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660156101] [2020-12-22 10:21:23,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:23,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:21:23,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040464144] [2020-12-22 10:21:23,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:21:23,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:23,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:21:23,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:21:23,616 INFO L87 Difference]: Start difference. First operand 82421 states and 119118 transitions. Second operand 10 states. [2020-12-22 10:21:47,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:47,652 INFO L93 Difference]: Finished difference Result 404359 states and 587415 transitions. [2020-12-22 10:21:47,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:21:47,653 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 149 [2020-12-22 10:21:47,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:48,412 INFO L225 Difference]: With dead ends: 404359 [2020-12-22 10:21:48,412 INFO L226 Difference]: Without dead ends: 365061 [2020-12-22 10:21:48,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:21:48,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365061 states. [2020-12-22 10:22:00,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365061 to 141429. [2020-12-22 10:22:00,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141429 states. [2020-12-22 10:22:01,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141429 states to 141429 states and 204046 transitions. [2020-12-22 10:22:01,258 INFO L78 Accepts]: Start accepts. Automaton has 141429 states and 204046 transitions. Word has length 149 [2020-12-22 10:22:01,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:01,258 INFO L481 AbstractCegarLoop]: Abstraction has 141429 states and 204046 transitions. [2020-12-22 10:22:01,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:22:01,258 INFO L276 IsEmpty]: Start isEmpty. Operand 141429 states and 204046 transitions. [2020-12-22 10:22:01,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 10:22:01,317 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:01,317 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:22:01,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:22:01,318 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:01,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:01,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1546967859, now seen corresponding path program 1 times [2020-12-22 10:22:01,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:01,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470860688] [2020-12-22 10:22:01,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:01,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:01,589 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:22:01,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470860688] [2020-12-22 10:22:01,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:01,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:22:01,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955520216] [2020-12-22 10:22:01,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:22:01,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:01,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:22:01,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:22:01,594 INFO L87 Difference]: Start difference. First operand 141429 states and 204046 transitions. Second operand 10 states. [2020-12-22 10:22:30,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:30,321 INFO L93 Difference]: Finished difference Result 443655 states and 644247 transitions. [2020-12-22 10:22:30,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:22:30,322 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 149 [2020-12-22 10:22:30,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:31,021 INFO L225 Difference]: With dead ends: 443655 [2020-12-22 10:22:31,021 INFO L226 Difference]: Without dead ends: 404357 [2020-12-22 10:22:31,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:22:31,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404357 states. [2020-12-22 10:22:47,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404357 to 180725. [2020-12-22 10:22:47,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180725 states. [2020-12-22 10:22:48,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180725 states to 180725 states and 260878 transitions. [2020-12-22 10:22:48,024 INFO L78 Accepts]: Start accepts. Automaton has 180725 states and 260878 transitions. Word has length 149 [2020-12-22 10:22:48,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:48,024 INFO L481 AbstractCegarLoop]: Abstraction has 180725 states and 260878 transitions. [2020-12-22 10:22:48,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:22:48,024 INFO L276 IsEmpty]: Start isEmpty. Operand 180725 states and 260878 transitions. [2020-12-22 10:22:48,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 10:22:48,091 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:48,092 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:22:48,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:22:48,092 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:48,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:48,093 INFO L82 PathProgramCache]: Analyzing trace with hash -928927789, now seen corresponding path program 1 times [2020-12-22 10:22:48,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:48,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655184048] [2020-12-22 10:22:48,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:48,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:48,291 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:22:48,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655184048] [2020-12-22 10:22:48,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:48,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:22:48,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437780476] [2020-12-22 10:22:48,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:22:48,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:48,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:22:48,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:22:48,293 INFO L87 Difference]: Start difference. First operand 180725 states and 260878 transitions. Second operand 10 states.