/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_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:18:59,066 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:18:59,069 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:18:59,108 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:18:59,109 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:18:59,110 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:18:59,112 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:18:59,114 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:18:59,117 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:18:59,118 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:18:59,119 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:18:59,121 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:18:59,121 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:18:59,122 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:18:59,124 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:18:59,125 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:18:59,127 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:18:59,128 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:18:59,152 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:18:59,157 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:18:59,159 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:18:59,161 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:18:59,162 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:18:59,163 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:18:59,167 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:18:59,171 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 10:18:59,172 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 10:18:59,173 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 10:18:59,174 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 10:18:59,175 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 10:18:59,175 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 10:18:59,176 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 10:18:59,177 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 10:18:59,177 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:18:59,178 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:18:59,179 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:18:59,180 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:18:59,208 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:18:59,209 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:18:59,210 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:18:59,211 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:18:59,211 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:18:59,211 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:18:59,212 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:18:59,212 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:18:59,212 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:18:59,213 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:18:59,213 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:18:59,213 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:18:59,214 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:18:59,214 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:18:59,214 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:18:59,215 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:18:59,215 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:18:59,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:18:59,215 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:18:59,216 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:18:59,216 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:18:59,216 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:18:59,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:18:59,217 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:18:59,217 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:18:59,217 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:18:59,572 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:18:59,597 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:18:59,600 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:18:59,601 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:18:59,603 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:18:59,604 INFO L432 ainManager$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_label02.c [2020-12-22 10:18:59,705 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c99323b4f/492b76f4557f46eb842a6985bf69f72c/FLAG4f2a23cec [2020-12-22 10:19:00,787 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:19:00,788 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.8.1.ufo.BOUNDED-16.pals+Problem12_label02.c [2020-12-22 10:19:00,820 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c99323b4f/492b76f4557f46eb842a6985bf69f72c/FLAG4f2a23cec [2020-12-22 10:19:01,298 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c99323b4f/492b76f4557f46eb842a6985bf69f72c [2020-12-22 10:19:01,301 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:19:01,304 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:19:01,305 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:19:01,305 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:19:01,309 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:19:01,310 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:19:01" (1/1) ... [2020-12-22 10:19:01,311 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bb07af9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:01, skipping insertion in model container [2020-12-22 10:19:01,312 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:19:01" (1/1) ... [2020-12-22 10:19:01,320 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:19:01,500 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:19:01,859 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_label02.c[26884,26897] [2020-12-22 10:19:01,921 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_label02.c[33931,33944] [2020-12-22 10:19:03,036 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:19:03,050 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:19:03,129 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_label02.c[26884,26897] [2020-12-22 10:19:03,142 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_label02.c[33931,33944] [2020-12-22 10:19:03,852 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:19:03,935 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:19:03,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:03 WrapperNode [2020-12-22 10:19:03,935 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:19:03,937 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:19:03,938 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:19:03,941 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:19:03,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:03" (1/1) ... [2020-12-22 10:19:04,027 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:03" (1/1) ... [2020-12-22 10:19:04,437 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:19:04,438 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:19:04,438 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:19:04,438 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:19:04,495 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:03" (1/1) ... [2020-12-22 10:19:04,496 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:03" (1/1) ... [2020-12-22 10:19:04,608 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:03" (1/1) ... [2020-12-22 10:19:04,608 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:03" (1/1) ... [2020-12-22 10:19:04,813 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:03" (1/1) ... [2020-12-22 10:19:04,862 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:03" (1/1) ... [2020-12-22 10:19:04,949 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:03" (1/1) ... [2020-12-22 10:19:05,051 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:19:05,054 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:19:05,054 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:19:05,054 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:19:05,055 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:03" (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 10:19:05,283 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:19:05,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:19:05,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:19:05,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:19:10,903 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:19:10,904 INFO L299 CfgBuilder]: Removed 42 assume(true) statements. [2020-12-22 10:19:10,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:19:10 BoogieIcfgContainer [2020-12-22 10:19:10,908 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:19:10,910 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:19:10,910 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:19:10,914 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:19:10,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:19:01" (1/3) ... [2020-12-22 10:19:10,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27be7d91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:19:10, skipping insertion in model container [2020-12-22 10:19:10,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:03" (2/3) ... [2020-12-22 10:19:10,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27be7d91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:19:10, skipping insertion in model container [2020-12-22 10:19:10,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:19:10" (3/3) ... [2020-12-22 10:19:10,918 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.1.ufo.BOUNDED-16.pals+Problem12_label02.c [2020-12-22 10:19:10,926 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:19:10,933 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:19:10,955 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:19:10,993 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:19:10,994 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:19:10,994 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:19:10,994 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:19:10,994 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:19:10,995 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:19:10,995 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:19:10,995 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:19:11,033 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states. [2020-12-22 10:19:11,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 10:19:11,046 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:11,047 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 10:19:11,048 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:11,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:11,058 INFO L82 PathProgramCache]: Analyzing trace with hash -2107180874, now seen corresponding path program 1 times [2020-12-22 10:19:11,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:11,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205487213] [2020-12-22 10:19:11,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:11,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:11,481 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 10:19:11,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205487213] [2020-12-22 10:19:11,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:11,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:19:11,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829859522] [2020-12-22 10:19:11,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 10:19:11,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:11,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 10:19:11,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:19:11,509 INFO L87 Difference]: Start difference. First operand 963 states. Second operand 2 states. [2020-12-22 10:19:11,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:11,629 INFO L93 Difference]: Finished difference Result 1859 states and 3512 transitions. [2020-12-22 10:19:11,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 10:19:11,631 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 46 [2020-12-22 10:19:11,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:11,695 INFO L225 Difference]: With dead ends: 1859 [2020-12-22 10:19:11,695 INFO L226 Difference]: Without dead ends: 897 [2020-12-22 10:19:11,710 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 10:19:11,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2020-12-22 10:19:11,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 897. [2020-12-22 10:19:11,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 897 states. [2020-12-22 10:19:11,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1688 transitions. [2020-12-22 10:19:11,840 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1688 transitions. Word has length 46 [2020-12-22 10:19:11,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:11,841 INFO L481 AbstractCegarLoop]: Abstraction has 897 states and 1688 transitions. [2020-12-22 10:19:11,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 10:19:11,841 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1688 transitions. [2020-12-22 10:19:11,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 10:19:11,851 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:11,852 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 10:19:11,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:19:11,852 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:11,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:11,855 INFO L82 PathProgramCache]: Analyzing trace with hash 815979124, now seen corresponding path program 1 times [2020-12-22 10:19:11,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:11,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263347366] [2020-12-22 10:19:11,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:11,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:12,006 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 10:19:12,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263347366] [2020-12-22 10:19:12,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:12,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:19:12,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305560921] [2020-12-22 10:19:12,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:19:12,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:12,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:19:12,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:19:12,016 INFO L87 Difference]: Start difference. First operand 897 states and 1688 transitions. Second operand 5 states. [2020-12-22 10:19:12,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:12,223 INFO L93 Difference]: Finished difference Result 977 states and 1813 transitions. [2020-12-22 10:19:12,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:19:12,223 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-12-22 10:19:12,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:12,231 INFO L225 Difference]: With dead ends: 977 [2020-12-22 10:19:12,231 INFO L226 Difference]: Without dead ends: 897 [2020-12-22 10:19:12,233 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 10:19:12,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2020-12-22 10:19:12,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 897. [2020-12-22 10:19:12,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 897 states. [2020-12-22 10:19:12,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1627 transitions. [2020-12-22 10:19:12,262 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1627 transitions. Word has length 46 [2020-12-22 10:19:12,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:12,262 INFO L481 AbstractCegarLoop]: Abstraction has 897 states and 1627 transitions. [2020-12-22 10:19:12,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:19:12,263 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1627 transitions. [2020-12-22 10:19:12,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 10:19:12,267 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:12,268 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] [2020-12-22 10:19:12,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:19:12,269 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:12,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:12,271 INFO L82 PathProgramCache]: Analyzing trace with hash -967931068, now seen corresponding path program 1 times [2020-12-22 10:19:12,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:12,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721556378] [2020-12-22 10:19:12,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:12,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:12,622 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 10:19:12,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721556378] [2020-12-22 10:19:12,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:12,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:19:12,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140476884] [2020-12-22 10:19:12,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:19:12,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:12,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:19:12,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:19:12,629 INFO L87 Difference]: Start difference. First operand 897 states and 1627 transitions. Second operand 4 states. [2020-12-22 10:19:23,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:23,686 INFO L93 Difference]: Finished difference Result 3152 states and 5936 transitions. [2020-12-22 10:19:23,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:19:23,687 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-12-22 10:19:23,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:23,702 INFO L225 Difference]: With dead ends: 3152 [2020-12-22 10:19:23,703 INFO L226 Difference]: Without dead ends: 2399 [2020-12-22 10:19:23,706 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 10:19:23,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2399 states. [2020-12-22 10:19:23,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2399 to 2399. [2020-12-22 10:19:23,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2399 states. [2020-12-22 10:19:23,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2399 states to 2399 states and 3741 transitions. [2020-12-22 10:19:23,768 INFO L78 Accepts]: Start accepts. Automaton has 2399 states and 3741 transitions. Word has length 63 [2020-12-22 10:19:23,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:23,769 INFO L481 AbstractCegarLoop]: Abstraction has 2399 states and 3741 transitions. [2020-12-22 10:19:23,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:19:23,769 INFO L276 IsEmpty]: Start isEmpty. Operand 2399 states and 3741 transitions. [2020-12-22 10:19:23,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:19:23,770 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:23,771 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 10:19:23,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:19:23,771 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:23,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:23,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1090783836, now seen corresponding path program 1 times [2020-12-22 10:19:23,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:23,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125361154] [2020-12-22 10:19:23,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:23,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:23,928 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 10:19:23,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125361154] [2020-12-22 10:19:23,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:23,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:19:23,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799435809] [2020-12-22 10:19:23,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:19:23,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:23,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:19:23,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:19:23,935 INFO L87 Difference]: Start difference. First operand 2399 states and 3741 transitions. Second operand 3 states. [2020-12-22 10:19:23,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:23,976 INFO L93 Difference]: Finished difference Result 2545 states and 3973 transitions. [2020-12-22 10:19:23,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:19:23,977 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:19:23,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:23,991 INFO L225 Difference]: With dead ends: 2545 [2020-12-22 10:19:23,991 INFO L226 Difference]: Without dead ends: 2469 [2020-12-22 10:19:23,993 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 10:19:23,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2469 states. [2020-12-22 10:19:24,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2469 to 2467. [2020-12-22 10:19:24,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2467 states. [2020-12-22 10:19:24,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2467 states to 2467 states and 3850 transitions. [2020-12-22 10:19:24,051 INFO L78 Accepts]: Start accepts. Automaton has 2467 states and 3850 transitions. Word has length 106 [2020-12-22 10:19:24,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:24,051 INFO L481 AbstractCegarLoop]: Abstraction has 2467 states and 3850 transitions. [2020-12-22 10:19:24,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:19:24,052 INFO L276 IsEmpty]: Start isEmpty. Operand 2467 states and 3850 transitions. [2020-12-22 10:19:24,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:19:24,053 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:24,054 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 10:19:24,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:19:24,054 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:24,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:24,055 INFO L82 PathProgramCache]: Analyzing trace with hash 326222874, now seen corresponding path program 1 times [2020-12-22 10:19:24,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:24,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048087534] [2020-12-22 10:19:24,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:24,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:24,218 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 10:19:24,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048087534] [2020-12-22 10:19:24,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:24,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:19:24,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993703456] [2020-12-22 10:19:24,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:19:24,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:24,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:19:24,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:19:24,223 INFO L87 Difference]: Start difference. First operand 2467 states and 3850 transitions. Second operand 3 states. [2020-12-22 10:19:24,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:24,281 INFO L93 Difference]: Finished difference Result 2743 states and 4290 transitions. [2020-12-22 10:19:24,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:19:24,282 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:19:24,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:24,301 INFO L225 Difference]: With dead ends: 2743 [2020-12-22 10:19:24,302 INFO L226 Difference]: Without dead ends: 2599 [2020-12-22 10:19:24,304 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 10:19:24,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2599 states. [2020-12-22 10:19:24,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2599 to 2597. [2020-12-22 10:19:24,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2597 states. [2020-12-22 10:19:24,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2597 states to 2597 states and 4057 transitions. [2020-12-22 10:19:24,377 INFO L78 Accepts]: Start accepts. Automaton has 2597 states and 4057 transitions. Word has length 106 [2020-12-22 10:19:24,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:24,378 INFO L481 AbstractCegarLoop]: Abstraction has 2597 states and 4057 transitions. [2020-12-22 10:19:24,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:19:24,378 INFO L276 IsEmpty]: Start isEmpty. Operand 2597 states and 4057 transitions. [2020-12-22 10:19:24,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:19:24,386 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:24,386 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 10:19:24,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:19:24,387 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:24,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:24,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1573731728, now seen corresponding path program 1 times [2020-12-22 10:19:24,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:24,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413891833] [2020-12-22 10:19:24,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:24,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:24,529 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 10:19:24,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413891833] [2020-12-22 10:19:24,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:24,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:19:24,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909285191] [2020-12-22 10:19:24,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:19:24,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:24,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:19:24,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:19:24,532 INFO L87 Difference]: Start difference. First operand 2597 states and 4057 transitions. Second operand 3 states. [2020-12-22 10:19:24,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:24,596 INFO L93 Difference]: Finished difference Result 3121 states and 4891 transitions. [2020-12-22 10:19:24,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:19:24,596 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:19:24,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:24,615 INFO L225 Difference]: With dead ends: 3121 [2020-12-22 10:19:24,616 INFO L226 Difference]: Without dead ends: 2847 [2020-12-22 10:19:24,618 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 10:19:24,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2847 states. [2020-12-22 10:19:24,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2847 to 2845. [2020-12-22 10:19:24,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2845 states. [2020-12-22 10:19:24,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2845 states to 2845 states and 4449 transitions. [2020-12-22 10:19:24,708 INFO L78 Accepts]: Start accepts. Automaton has 2845 states and 4449 transitions. Word has length 106 [2020-12-22 10:19:24,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:24,710 INFO L481 AbstractCegarLoop]: Abstraction has 2845 states and 4449 transitions. [2020-12-22 10:19:24,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:19:24,710 INFO L276 IsEmpty]: Start isEmpty. Operand 2845 states and 4449 transitions. [2020-12-22 10:19:24,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:19:24,713 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:24,713 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 10:19:24,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:19:24,720 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:24,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:24,720 INFO L82 PathProgramCache]: Analyzing trace with hash 832299526, now seen corresponding path program 1 times [2020-12-22 10:19:24,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:24,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424518044] [2020-12-22 10:19:24,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:24,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:24,875 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 10:19:24,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424518044] [2020-12-22 10:19:24,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:24,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:19:24,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203457208] [2020-12-22 10:19:24,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:19:24,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:24,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:19:24,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:19:24,879 INFO L87 Difference]: Start difference. First operand 2845 states and 4449 transitions. Second operand 3 states. [2020-12-22 10:19:24,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:24,944 INFO L93 Difference]: Finished difference Result 3841 states and 6027 transitions. [2020-12-22 10:19:24,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:19:24,945 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:19:24,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:24,963 INFO L225 Difference]: With dead ends: 3841 [2020-12-22 10:19:24,963 INFO L226 Difference]: Without dead ends: 3319 [2020-12-22 10:19:24,966 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 10:19:24,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3319 states. [2020-12-22 10:19:25,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3319 to 3317. [2020-12-22 10:19:25,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3317 states. [2020-12-22 10:19:25,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3317 states to 3317 states and 5189 transitions. [2020-12-22 10:19:25,070 INFO L78 Accepts]: Start accepts. Automaton has 3317 states and 5189 transitions. Word has length 106 [2020-12-22 10:19:25,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:25,070 INFO L481 AbstractCegarLoop]: Abstraction has 3317 states and 5189 transitions. [2020-12-22 10:19:25,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:19:25,070 INFO L276 IsEmpty]: Start isEmpty. Operand 3317 states and 5189 transitions. [2020-12-22 10:19:25,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:19:25,072 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:25,072 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 10:19:25,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:19:25,072 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:25,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:25,073 INFO L82 PathProgramCache]: Analyzing trace with hash 2050284924, now seen corresponding path program 1 times [2020-12-22 10:19:25,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:25,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953841673] [2020-12-22 10:19:25,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:25,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:25,341 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 10:19:25,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953841673] [2020-12-22 10:19:25,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:25,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:19:25,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408571884] [2020-12-22 10:19:25,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:19:25,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:25,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:19:25,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:19:25,344 INFO L87 Difference]: Start difference. First operand 3317 states and 5189 transitions. Second operand 10 states. [2020-12-22 10:19:26,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:26,433 INFO L93 Difference]: Finished difference Result 19221 states and 30293 transitions. [2020-12-22 10:19:26,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 10:19:26,434 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 106 [2020-12-22 10:19:26,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:26,512 INFO L225 Difference]: With dead ends: 19221 [2020-12-22 10:19:26,512 INFO L226 Difference]: Without dead ends: 18227 [2020-12-22 10:19:26,522 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 10:19:26,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18227 states. [2020-12-22 10:19:26,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18227 to 4309. [2020-12-22 10:19:26,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4309 states. [2020-12-22 10:19:26,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4309 states to 4309 states and 6725 transitions. [2020-12-22 10:19:26,866 INFO L78 Accepts]: Start accepts. Automaton has 4309 states and 6725 transitions. Word has length 106 [2020-12-22 10:19:26,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:26,866 INFO L481 AbstractCegarLoop]: Abstraction has 4309 states and 6725 transitions. [2020-12-22 10:19:26,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:19:26,867 INFO L276 IsEmpty]: Start isEmpty. Operand 4309 states and 6725 transitions. [2020-12-22 10:19:26,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:19:26,868 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:26,868 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 10:19:26,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:19:26,869 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:26,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:26,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1813103660, now seen corresponding path program 1 times [2020-12-22 10:19:26,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:26,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164693944] [2020-12-22 10:19:26,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:26,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:26,990 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 10:19:26,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164693944] [2020-12-22 10:19:26,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:26,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:19:26,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144408256] [2020-12-22 10:19:26,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:19:26,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:26,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:19:26,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:19:26,994 INFO L87 Difference]: Start difference. First operand 4309 states and 6725 transitions. Second operand 3 states. [2020-12-22 10:19:27,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:27,190 INFO L93 Difference]: Finished difference Result 7251 states and 11321 transitions. [2020-12-22 10:19:27,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:19:27,191 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:19:27,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:27,204 INFO L225 Difference]: With dead ends: 7251 [2020-12-22 10:19:27,204 INFO L226 Difference]: Without dead ends: 5265 [2020-12-22 10:19:27,209 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 10:19:27,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5265 states. [2020-12-22 10:19:27,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5265 to 5263. [2020-12-22 10:19:27,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5263 states. [2020-12-22 10:19:27,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5263 states to 5263 states and 8191 transitions. [2020-12-22 10:19:27,533 INFO L78 Accepts]: Start accepts. Automaton has 5263 states and 8191 transitions. Word has length 108 [2020-12-22 10:19:27,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:27,538 INFO L481 AbstractCegarLoop]: Abstraction has 5263 states and 8191 transitions. [2020-12-22 10:19:27,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:19:27,538 INFO L276 IsEmpty]: Start isEmpty. Operand 5263 states and 8191 transitions. [2020-12-22 10:19:27,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:19:27,540 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:27,540 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 10:19:27,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:19:27,541 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:27,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:27,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1879597172, now seen corresponding path program 1 times [2020-12-22 10:19:27,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:27,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179758368] [2020-12-22 10:19:27,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:27,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:27,991 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 10:19:27,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179758368] [2020-12-22 10:19:27,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:27,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:19:27,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515570644] [2020-12-22 10:19:27,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:19:27,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:27,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:19:27,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:19:27,994 INFO L87 Difference]: Start difference. First operand 5263 states and 8191 transitions. Second operand 10 states. [2020-12-22 10:19:28,474 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-12-22 10:19:28,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:28,853 INFO L93 Difference]: Finished difference Result 8203 states and 12761 transitions. [2020-12-22 10:19:28,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:19:28,854 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 108 [2020-12-22 10:19:28,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:28,867 INFO L225 Difference]: With dead ends: 8203 [2020-12-22 10:19:28,868 INFO L226 Difference]: Without dead ends: 5265 [2020-12-22 10:19:28,875 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 10:19:28,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5265 states. [2020-12-22 10:19:29,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5265 to 5263. [2020-12-22 10:19:29,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5263 states. [2020-12-22 10:19:29,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5263 states to 5263 states and 8167 transitions. [2020-12-22 10:19:29,136 INFO L78 Accepts]: Start accepts. Automaton has 5263 states and 8167 transitions. Word has length 108 [2020-12-22 10:19:29,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:29,136 INFO L481 AbstractCegarLoop]: Abstraction has 5263 states and 8167 transitions. [2020-12-22 10:19:29,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:19:29,136 INFO L276 IsEmpty]: Start isEmpty. Operand 5263 states and 8167 transitions. [2020-12-22 10:19:29,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:19:29,138 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:29,138 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 10:19:29,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:19:29,139 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:29,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:29,139 INFO L82 PathProgramCache]: Analyzing trace with hash 621051568, now seen corresponding path program 1 times [2020-12-22 10:19:29,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:29,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985726090] [2020-12-22 10:19:29,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:29,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:29,229 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 10:19:29,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985726090] [2020-12-22 10:19:29,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:29,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:19:29,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366872651] [2020-12-22 10:19:29,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:19:29,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:29,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:19:29,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:19:29,233 INFO L87 Difference]: Start difference. First operand 5263 states and 8167 transitions. Second operand 3 states. [2020-12-22 10:19:29,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:29,591 INFO L93 Difference]: Finished difference Result 10851 states and 16777 transitions. [2020-12-22 10:19:29,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:19:29,592 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:19:29,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:29,610 INFO L225 Difference]: With dead ends: 10851 [2020-12-22 10:19:29,611 INFO L226 Difference]: Without dead ends: 7913 [2020-12-22 10:19:29,618 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 10:19:29,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7913 states. [2020-12-22 10:19:30,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7913 to 7911. [2020-12-22 10:19:30,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7911 states. [2020-12-22 10:19:30,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7911 states to 7911 states and 12183 transitions. [2020-12-22 10:19:30,176 INFO L78 Accepts]: Start accepts. Automaton has 7911 states and 12183 transitions. Word has length 108 [2020-12-22 10:19:30,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:30,176 INFO L481 AbstractCegarLoop]: Abstraction has 7911 states and 12183 transitions. [2020-12-22 10:19:30,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:19:30,177 INFO L276 IsEmpty]: Start isEmpty. Operand 7911 states and 12183 transitions. [2020-12-22 10:19:30,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:19:30,179 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:30,179 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:19:30,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:19:30,179 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:30,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:30,180 INFO L82 PathProgramCache]: Analyzing trace with hash 894739280, now seen corresponding path program 1 times [2020-12-22 10:19:30,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:30,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146585398] [2020-12-22 10:19:30,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:30,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:30,292 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 10:19:30,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146585398] [2020-12-22 10:19:30,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:30,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:19:30,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699194028] [2020-12-22 10:19:30,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:19:30,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:30,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:19:30,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:19:30,295 INFO L87 Difference]: Start difference. First operand 7911 states and 12183 transitions. Second operand 3 states. [2020-12-22 10:19:30,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:30,902 INFO L93 Difference]: Finished difference Result 18507 states and 28345 transitions. [2020-12-22 10:19:30,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:19:30,903 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:19:30,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:30,931 INFO L225 Difference]: With dead ends: 18507 [2020-12-22 10:19:30,931 INFO L226 Difference]: Without dead ends: 12921 [2020-12-22 10:19:30,942 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 10:19:30,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12921 states. [2020-12-22 10:19:31,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12921 to 12919. [2020-12-22 10:19:31,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12919 states. [2020-12-22 10:19:32,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12919 states to 12919 states and 19687 transitions. [2020-12-22 10:19:32,023 INFO L78 Accepts]: Start accepts. Automaton has 12919 states and 19687 transitions. Word has length 108 [2020-12-22 10:19:32,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:32,024 INFO L481 AbstractCegarLoop]: Abstraction has 12919 states and 19687 transitions. [2020-12-22 10:19:32,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:19:32,024 INFO L276 IsEmpty]: Start isEmpty. Operand 12919 states and 19687 transitions. [2020-12-22 10:19:32,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:19:32,025 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:32,025 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 10:19:32,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:19:32,026 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:32,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:32,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1581156368, now seen corresponding path program 1 times [2020-12-22 10:19:32,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:32,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743712886] [2020-12-22 10:19:32,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:32,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:32,113 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 10:19:32,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743712886] [2020-12-22 10:19:32,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:32,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:19:32,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169855560] [2020-12-22 10:19:32,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:19:32,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:32,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:19:32,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:19:32,121 INFO L87 Difference]: Start difference. First operand 12919 states and 19687 transitions. Second operand 3 states. [2020-12-22 10:19:33,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:33,482 INFO L93 Difference]: Finished difference Result 32955 states and 49897 transitions. [2020-12-22 10:19:33,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:19:33,483 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:19:33,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:33,531 INFO L225 Difference]: With dead ends: 32955 [2020-12-22 10:19:33,531 INFO L226 Difference]: Without dead ends: 22361 [2020-12-22 10:19:33,551 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 10:19:33,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22361 states. [2020-12-22 10:19:34,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22361 to 22359. [2020-12-22 10:19:34,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22359 states. [2020-12-22 10:19:34,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22359 states to 22359 states and 33639 transitions. [2020-12-22 10:19:34,692 INFO L78 Accepts]: Start accepts. Automaton has 22359 states and 33639 transitions. Word has length 108 [2020-12-22 10:19:34,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:34,693 INFO L481 AbstractCegarLoop]: Abstraction has 22359 states and 33639 transitions. [2020-12-22 10:19:34,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:19:34,693 INFO L276 IsEmpty]: Start isEmpty. Operand 22359 states and 33639 transitions. [2020-12-22 10:19:34,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:19:34,694 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:34,694 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 10:19:34,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:19:34,695 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:34,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:34,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1401750384, now seen corresponding path program 1 times [2020-12-22 10:19:34,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:34,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753204521] [2020-12-22 10:19:34,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:34,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:34,771 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 10:19:34,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753204521] [2020-12-22 10:19:34,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:34,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:19:34,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277537781] [2020-12-22 10:19:34,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:19:34,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:34,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:19:34,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:19:34,773 INFO L87 Difference]: Start difference. First operand 22359 states and 33639 transitions. Second operand 3 states. [2020-12-22 10:19:36,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:36,874 INFO L93 Difference]: Finished difference Result 60123 states and 89833 transitions. [2020-12-22 10:19:36,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:19:36,874 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:19:36,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:36,962 INFO L225 Difference]: With dead ends: 60123 [2020-12-22 10:19:36,962 INFO L226 Difference]: Without dead ends: 40089 [2020-12-22 10:19:36,994 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 10:19:37,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40089 states. [2020-12-22 10:19:39,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40089 to 40087. [2020-12-22 10:19:39,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40087 states. [2020-12-22 10:19:39,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40087 states to 40087 states and 59431 transitions. [2020-12-22 10:19:39,284 INFO L78 Accepts]: Start accepts. Automaton has 40087 states and 59431 transitions. Word has length 108 [2020-12-22 10:19:39,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:39,284 INFO L481 AbstractCegarLoop]: Abstraction has 40087 states and 59431 transitions. [2020-12-22 10:19:39,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:19:39,284 INFO L276 IsEmpty]: Start isEmpty. Operand 40087 states and 59431 transitions. [2020-12-22 10:19:39,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 10:19:39,285 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:39,285 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 10:19:39,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:19:39,286 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:39,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:39,286 INFO L82 PathProgramCache]: Analyzing trace with hash 2018214719, now seen corresponding path program 1 times [2020-12-22 10:19:39,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:39,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980122187] [2020-12-22 10:19:39,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:39,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:39,413 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 10:19:39,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980122187] [2020-12-22 10:19:39,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:39,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:19:39,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25215244] [2020-12-22 10:19:39,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:19:39,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:39,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:19:39,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:19:39,416 INFO L87 Difference]: Start difference. First operand 40087 states and 59431 transitions. Second operand 8 states. [2020-12-22 10:19:43,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:43,783 INFO L93 Difference]: Finished difference Result 72254 states and 106008 transitions. [2020-12-22 10:19:43,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:19:43,783 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 109 [2020-12-22 10:19:43,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:43,895 INFO L225 Difference]: With dead ends: 72254 [2020-12-22 10:19:43,895 INFO L226 Difference]: Without dead ends: 72252 [2020-12-22 10:19:43,914 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 10:19:43,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72252 states. [2020-12-22 10:19:46,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72252 to 41623. [2020-12-22 10:19:46,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41623 states. [2020-12-22 10:19:47,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41623 states to 41623 states and 60839 transitions. [2020-12-22 10:19:47,039 INFO L78 Accepts]: Start accepts. Automaton has 41623 states and 60839 transitions. Word has length 109 [2020-12-22 10:19:47,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:47,040 INFO L481 AbstractCegarLoop]: Abstraction has 41623 states and 60839 transitions. [2020-12-22 10:19:47,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:19:47,040 INFO L276 IsEmpty]: Start isEmpty. Operand 41623 states and 60839 transitions. [2020-12-22 10:19:47,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 10:19:47,045 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:47,045 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:19:47,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:19:47,046 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:47,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:47,046 INFO L82 PathProgramCache]: Analyzing trace with hash 2086636605, now seen corresponding path program 1 times [2020-12-22 10:19:47,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:47,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932759729] [2020-12-22 10:19:47,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:47,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:47,347 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:19:47,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932759729] [2020-12-22 10:19:47,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:47,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:19:47,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182733080] [2020-12-22 10:19:47,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:19:47,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:47,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:19:47,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:19:47,349 INFO L87 Difference]: Start difference. First operand 41623 states and 60839 transitions. Second operand 4 states. [2020-12-22 10:19:57,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:57,759 INFO L93 Difference]: Finished difference Result 45417 states and 67202 transitions. [2020-12-22 10:19:57,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:19:57,760 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 134 [2020-12-22 10:19:57,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:57,804 INFO L225 Difference]: With dead ends: 45417 [2020-12-22 10:19:57,804 INFO L226 Difference]: Without dead ends: 43125 [2020-12-22 10:19:57,815 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 10:19:57,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43125 states. [2020-12-22 10:20:00,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43125 to 42374. [2020-12-22 10:20:00,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42374 states. [2020-12-22 10:20:00,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42374 states to 42374 states and 61592 transitions. [2020-12-22 10:20:00,601 INFO L78 Accepts]: Start accepts. Automaton has 42374 states and 61592 transitions. Word has length 134 [2020-12-22 10:20:00,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:00,601 INFO L481 AbstractCegarLoop]: Abstraction has 42374 states and 61592 transitions. [2020-12-22 10:20:00,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:20:00,601 INFO L276 IsEmpty]: Start isEmpty. Operand 42374 states and 61592 transitions. [2020-12-22 10:20:00,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 10:20:00,625 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:00,625 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 10:20:00,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:20:00,626 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:00,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:00,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1243757929, now seen corresponding path program 1 times [2020-12-22 10:20:00,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:00,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613861258] [2020-12-22 10:20:00,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:00,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:00,838 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 10:20:00,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613861258] [2020-12-22 10:20:00,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:00,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:20:00,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944417155] [2020-12-22 10:20:00,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:20:00,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:00,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:20:00,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:20:00,840 INFO L87 Difference]: Start difference. First operand 42374 states and 61592 transitions. Second operand 10 states. [2020-12-22 10:20:19,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:19,474 INFO L93 Difference]: Finished difference Result 364312 states and 529889 transitions. [2020-12-22 10:20:19,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:20:19,475 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 149 [2020-12-22 10:20:19,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:20,164 INFO L225 Difference]: With dead ends: 364312 [2020-12-22 10:20:20,165 INFO L226 Difference]: Without dead ends: 325014 [2020-12-22 10:20:20,259 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 10:20:20,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325014 states. [2020-12-22 10:20:28,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325014 to 81670. [2020-12-22 10:20:28,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81670 states. [2020-12-22 10:20:28,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81670 states to 81670 states and 118424 transitions. [2020-12-22 10:20:28,538 INFO L78 Accepts]: Start accepts. Automaton has 81670 states and 118424 transitions. Word has length 149 [2020-12-22 10:20:28,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:28,539 INFO L481 AbstractCegarLoop]: Abstraction has 81670 states and 118424 transitions. [2020-12-22 10:20:28,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:20:28,539 INFO L276 IsEmpty]: Start isEmpty. Operand 81670 states and 118424 transitions. [2020-12-22 10:20:28,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 10:20:28,567 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:28,568 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 10:20:28,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:20:28,568 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:28,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:28,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1273280147, now seen corresponding path program 1 times [2020-12-22 10:20:28,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:28,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935462661] [2020-12-22 10:20:28,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:28,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:28,845 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 10:20:28,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935462661] [2020-12-22 10:20:28,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:28,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:20:28,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321489090] [2020-12-22 10:20:28,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:20:28,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:28,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:20:28,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:20:28,851 INFO L87 Difference]: Start difference. First operand 81670 states and 118424 transitions. Second operand 10 states. [2020-12-22 10:20:52,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:52,042 INFO L93 Difference]: Finished difference Result 403608 states and 586721 transitions. [2020-12-22 10:20:52,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:20:52,043 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 149 [2020-12-22 10:20:52,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:52,781 INFO L225 Difference]: With dead ends: 403608 [2020-12-22 10:20:52,782 INFO L226 Difference]: Without dead ends: 364310 [2020-12-22 10:20:52,924 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 10:20:53,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364310 states. [2020-12-22 10:21:04,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364310 to 140678. [2020-12-22 10:21:04,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140678 states. [2020-12-22 10:21:05,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140678 states to 140678 states and 203352 transitions. [2020-12-22 10:21:05,513 INFO L78 Accepts]: Start accepts. Automaton has 140678 states and 203352 transitions. Word has length 149 [2020-12-22 10:21:05,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:05,514 INFO L481 AbstractCegarLoop]: Abstraction has 140678 states and 203352 transitions. [2020-12-22 10:21:05,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:21:05,514 INFO L276 IsEmpty]: Start isEmpty. Operand 140678 states and 203352 transitions. [2020-12-22 10:21:05,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 10:21:05,545 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:05,545 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 10:21:05,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:21:05,545 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:05,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:05,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1546967859, now seen corresponding path program 1 times [2020-12-22 10:21:05,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:05,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666314566] [2020-12-22 10:21:05,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:05,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:05,812 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 10:21:05,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666314566] [2020-12-22 10:21:05,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:05,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:21:05,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176356093] [2020-12-22 10:21:05,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:21:05,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:05,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:21:05,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:21:05,815 INFO L87 Difference]: Start difference. First operand 140678 states and 203352 transitions. Second operand 10 states. [2020-12-22 10:21:33,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:33,996 INFO L93 Difference]: Finished difference Result 442904 states and 643553 transitions. [2020-12-22 10:21:33,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:21:33,996 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 149 [2020-12-22 10:21:33,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:34,614 INFO L225 Difference]: With dead ends: 442904 [2020-12-22 10:21:34,614 INFO L226 Difference]: Without dead ends: 403606 [2020-12-22 10:21:34,713 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 10:21:35,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403606 states. [2020-12-22 10:21:50,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403606 to 179974. [2020-12-22 10:21:50,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179974 states. [2020-12-22 10:21:51,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179974 states to 179974 states and 260184 transitions. [2020-12-22 10:21:51,032 INFO L78 Accepts]: Start accepts. Automaton has 179974 states and 260184 transitions. Word has length 149 [2020-12-22 10:21:51,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:51,033 INFO L481 AbstractCegarLoop]: Abstraction has 179974 states and 260184 transitions. [2020-12-22 10:21:51,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:21:51,033 INFO L276 IsEmpty]: Start isEmpty. Operand 179974 states and 260184 transitions. [2020-12-22 10:21:51,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 10:21:51,093 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:51,094 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 10:21:51,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:21:51,094 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:51,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:51,095 INFO L82 PathProgramCache]: Analyzing trace with hash -928927789, now seen corresponding path program 1 times [2020-12-22 10:21:51,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:51,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97441107] [2020-12-22 10:21:51,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:51,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:51,375 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 10:21:51,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97441107] [2020-12-22 10:21:51,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:51,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:21:51,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204630939] [2020-12-22 10:21:51,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:21:51,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:51,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:21:51,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:21:51,378 INFO L87 Difference]: Start difference. First operand 179974 states and 260184 transitions. Second operand 10 states. [2020-12-22 10:22:26,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:26,360 INFO L93 Difference]: Finished difference Result 482200 states and 700385 transitions. [2020-12-22 10:22:26,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:22:26,360 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 149 [2020-12-22 10:22:26,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:27,278 INFO L225 Difference]: With dead ends: 482200 [2020-12-22 10:22:27,278 INFO L226 Difference]: Without dead ends: 442902 [2020-12-22 10:22:27,429 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 10:22:27,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442902 states.