/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.ufo.BOUNDED-16.pals+Problem12_label00.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:20:56,969 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:20:56,972 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:20:57,006 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:20:57,007 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:20:57,008 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:20:57,010 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:20:57,013 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:20:57,015 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:20:57,016 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:20:57,017 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:20:57,018 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:20:57,019 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:20:57,020 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:20:57,022 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:20:57,023 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:20:57,024 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:20:57,025 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:20:57,027 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:20:57,030 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:20:57,032 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:20:57,036 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:20:57,039 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:20:57,054 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:20:57,058 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:20:57,078 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:20:57,079 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:20:57,080 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:20:57,081 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:20:57,109 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:20:57,109 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:20:57,111 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:20:57,111 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:20:57,111 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:20:57,112 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:20:57,112 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:20:57,112 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:20:57,112 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:20:57,113 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:20:57,113 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:20:57,113 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:20:57,113 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:20:57,113 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:20:57,114 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:20:57,114 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:20:57,114 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:20:57,114 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:20:57,115 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:20:57,115 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:20:57,115 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:20:57,115 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:20:57,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:20:57,116 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:20:57,116 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:20:57,116 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:20:57,523 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:20:57,553 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:20:57,556 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:20:57,558 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:20:57,558 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:20:57,559 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.8.ufo.BOUNDED-16.pals+Problem12_label00.c [2020-12-22 10:20:57,644 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36735e2e0/fd84ff84789b42bea4f969e8efd5fbc9/FLAG92aa4b898 [2020-12-22 10:20:58,651 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:20:58,651 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.8.ufo.BOUNDED-16.pals+Problem12_label00.c [2020-12-22 10:20:58,692 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36735e2e0/fd84ff84789b42bea4f969e8efd5fbc9/FLAG92aa4b898 [2020-12-22 10:20:59,205 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36735e2e0/fd84ff84789b42bea4f969e8efd5fbc9 [2020-12-22 10:20:59,209 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:20:59,213 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:20:59,215 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:20:59,215 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:20:59,219 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:20:59,219 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:20:59" (1/1) ... [2020-12-22 10:20:59,221 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36e99f03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:20:59, skipping insertion in model container [2020-12-22 10:20:59,222 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:20:59" (1/1) ... [2020-12-22 10:20:59,230 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:20:59,372 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:20:59,871 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.ufo.BOUNDED-16.pals+Problem12_label00.c[26847,26860] [2020-12-22 10:20:59,954 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.ufo.BOUNDED-16.pals+Problem12_label00.c[28479,28492] [2020-12-22 10:21:00,997 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:21:01,012 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:21:01,089 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.ufo.BOUNDED-16.pals+Problem12_label00.c[26847,26860] [2020-12-22 10:21:01,098 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.ufo.BOUNDED-16.pals+Problem12_label00.c[28479,28492] [2020-12-22 10:21:01,797 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:21:01,837 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:21:01,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:21:01 WrapperNode [2020-12-22 10:21:01,838 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:21:01,839 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:21:01,839 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:21:01,839 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:21:01,848 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:21:01" (1/1) ... [2020-12-22 10:21:01,911 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:21:01" (1/1) ... [2020-12-22 10:21:02,365 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:21:02,367 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:21:02,368 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:21:02,368 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:21:02,377 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:21:01" (1/1) ... [2020-12-22 10:21:02,377 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:21:01" (1/1) ... [2020-12-22 10:21:02,448 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:21:01" (1/1) ... [2020-12-22 10:21:02,449 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:21:01" (1/1) ... [2020-12-22 10:21:02,651 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:21:01" (1/1) ... [2020-12-22 10:21:02,716 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:21:01" (1/1) ... [2020-12-22 10:21:02,798 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:21:01" (1/1) ... [2020-12-22 10:21:03,027 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:21:03,034 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:21:03,034 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:21:03,034 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:21:03,035 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:21:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:21:03,178 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:21:03,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:21:03,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:21:03,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:21:08,257 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:21:08,257 INFO L299 CfgBuilder]: Removed 42 assume(true) statements. [2020-12-22 10:21:08,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:21:08 BoogieIcfgContainer [2020-12-22 10:21:08,261 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:21:08,263 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:21:08,263 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:21:08,266 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:21:08,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:20:59" (1/3) ... [2020-12-22 10:21:08,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f708baa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:21:08, skipping insertion in model container [2020-12-22 10:21:08,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:21:01" (2/3) ... [2020-12-22 10:21:08,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f708baa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:21:08, skipping insertion in model container [2020-12-22 10:21:08,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:21:08" (3/3) ... [2020-12-22 10:21:08,270 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.ufo.BOUNDED-16.pals+Problem12_label00.c [2020-12-22 10:21:08,276 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:21:08,282 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:21:08,301 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:21:08,335 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:21:08,335 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:21:08,336 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:21:08,336 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:21:08,336 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:21:08,336 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:21:08,336 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:21:08,336 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:21:08,369 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states. [2020-12-22 10:21:08,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 10:21:08,376 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:08,377 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:21:08,377 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:08,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:08,384 INFO L82 PathProgramCache]: Analyzing trace with hash -242791467, now seen corresponding path program 1 times [2020-12-22 10:21:08,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:08,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132062603] [2020-12-22 10:21:08,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:08,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:08,732 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 10:21:08,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132062603] [2020-12-22 10:21:08,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:08,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:21:08,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416339789] [2020-12-22 10:21:08,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:21:08,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:08,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:21:08,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:21:08,761 INFO L87 Difference]: Start difference. First operand 963 states. Second operand 3 states. [2020-12-22 10:21:14,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:14,695 INFO L93 Difference]: Finished difference Result 2614 states and 5014 transitions. [2020-12-22 10:21:14,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:21:14,697 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-12-22 10:21:14,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:14,738 INFO L225 Difference]: With dead ends: 2614 [2020-12-22 10:21:14,739 INFO L226 Difference]: Without dead ends: 1648 [2020-12-22 10:21:14,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 10:21:14,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1648 states. [2020-12-22 10:21:14,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1648 to 1648. [2020-12-22 10:21:14,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1648 states. [2020-12-22 10:21:14,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1648 states to 1648 states and 3027 transitions. [2020-12-22 10:21:14,906 INFO L78 Accepts]: Start accepts. Automaton has 1648 states and 3027 transitions. Word has length 16 [2020-12-22 10:21:14,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:14,906 INFO L481 AbstractCegarLoop]: Abstraction has 1648 states and 3027 transitions. [2020-12-22 10:21:14,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:21:14,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1648 states and 3027 transitions. [2020-12-22 10:21:14,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 10:21:14,911 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:14,911 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 10:21:14,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:21:14,912 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:14,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:14,914 INFO L82 PathProgramCache]: Analyzing trace with hash 815979124, now seen corresponding path program 1 times [2020-12-22 10:21:14,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:14,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602993003] [2020-12-22 10:21:14,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:15,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:15,143 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 10:21:15,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602993003] [2020-12-22 10:21:15,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:15,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:21:15,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633411590] [2020-12-22 10:21:15,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:21:15,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:15,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:21:15,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:21:15,154 INFO L87 Difference]: Start difference. First operand 1648 states and 3027 transitions. Second operand 5 states. [2020-12-22 10:21:15,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:15,317 INFO L93 Difference]: Finished difference Result 1728 states and 3152 transitions. [2020-12-22 10:21:15,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:21:15,318 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-12-22 10:21:15,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:15,330 INFO L225 Difference]: With dead ends: 1728 [2020-12-22 10:21:15,331 INFO L226 Difference]: Without dead ends: 1648 [2020-12-22 10:21:15,335 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 10:21:15,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1648 states. [2020-12-22 10:21:15,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1648 to 1648. [2020-12-22 10:21:15,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1648 states. [2020-12-22 10:21:15,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1648 states to 1648 states and 2966 transitions. [2020-12-22 10:21:15,400 INFO L78 Accepts]: Start accepts. Automaton has 1648 states and 2966 transitions. Word has length 46 [2020-12-22 10:21:15,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:15,400 INFO L481 AbstractCegarLoop]: Abstraction has 1648 states and 2966 transitions. [2020-12-22 10:21:15,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:21:15,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1648 states and 2966 transitions. [2020-12-22 10:21:15,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-22 10:21:15,413 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:15,414 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 10:21:15,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:21:15,416 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:15,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:15,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1579898040, now seen corresponding path program 1 times [2020-12-22 10:21:15,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:15,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708637065] [2020-12-22 10:21:15,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:15,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:15,734 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:21:15,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708637065] [2020-12-22 10:21:15,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:15,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:21:15,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90722133] [2020-12-22 10:21:15,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:21:15,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:15,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:21:15,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:21:15,750 INFO L87 Difference]: Start difference. First operand 1648 states and 2966 transitions. Second operand 4 states. [2020-12-22 10:21:25,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:25,685 INFO L93 Difference]: Finished difference Result 5405 states and 9856 transitions. [2020-12-22 10:21:25,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:21:25,686 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 85 [2020-12-22 10:21:25,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:25,708 INFO L225 Difference]: With dead ends: 5405 [2020-12-22 10:21:25,708 INFO L226 Difference]: Without dead ends: 3901 [2020-12-22 10:21:25,712 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 10:21:25,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3901 states. [2020-12-22 10:21:25,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3901 to 3901. [2020-12-22 10:21:25,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3901 states. [2020-12-22 10:21:25,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3901 states to 3901 states and 6095 transitions. [2020-12-22 10:21:25,802 INFO L78 Accepts]: Start accepts. Automaton has 3901 states and 6095 transitions. Word has length 85 [2020-12-22 10:21:25,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:25,803 INFO L481 AbstractCegarLoop]: Abstraction has 3901 states and 6095 transitions. [2020-12-22 10:21:25,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:21:25,803 INFO L276 IsEmpty]: Start isEmpty. Operand 3901 states and 6095 transitions. [2020-12-22 10:21:25,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-22 10:21:25,804 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:25,805 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 10:21:25,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:21:25,805 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:25,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:25,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1817535011, now seen corresponding path program 1 times [2020-12-22 10:21:25,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:25,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783531936] [2020-12-22 10:21:25,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:25,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:25,885 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:21:25,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783531936] [2020-12-22 10:21:25,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:25,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:21:25,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536130938] [2020-12-22 10:21:25,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:21:25,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:25,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:21:25,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:21:25,888 INFO L87 Difference]: Start difference. First operand 3901 states and 6095 transitions. Second operand 3 states. [2020-12-22 10:21:31,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:31,566 INFO L93 Difference]: Finished difference Result 10662 states and 17147 transitions. [2020-12-22 10:21:31,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:21:31,569 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 87 [2020-12-22 10:21:31,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:31,605 INFO L225 Difference]: With dead ends: 10662 [2020-12-22 10:21:31,605 INFO L226 Difference]: Without dead ends: 6905 [2020-12-22 10:21:31,611 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 10:21:31,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6905 states. [2020-12-22 10:21:31,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6905 to 6905. [2020-12-22 10:21:31,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6905 states. [2020-12-22 10:21:31,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6905 states to 6905 states and 10575 transitions. [2020-12-22 10:21:31,777 INFO L78 Accepts]: Start accepts. Automaton has 6905 states and 10575 transitions. Word has length 87 [2020-12-22 10:21:31,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:31,778 INFO L481 AbstractCegarLoop]: Abstraction has 6905 states and 10575 transitions. [2020-12-22 10:21:31,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:21:31,778 INFO L276 IsEmpty]: Start isEmpty. Operand 6905 states and 10575 transitions. [2020-12-22 10:21:31,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:21:31,780 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:31,780 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 10:21:31,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:21:31,781 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:31,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:31,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1090783836, now seen corresponding path program 1 times [2020-12-22 10:21:31,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:31,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547541805] [2020-12-22 10:21:31,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:31,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:31,953 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 10:21:31,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547541805] [2020-12-22 10:21:31,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:31,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:21:31,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539628442] [2020-12-22 10:21:31,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:21:31,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:31,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:21:31,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:21:31,959 INFO L87 Difference]: Start difference. First operand 6905 states and 10575 transitions. Second operand 3 states. [2020-12-22 10:21:32,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:32,031 INFO L93 Difference]: Finished difference Result 7051 states and 10807 transitions. [2020-12-22 10:21:32,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:21:32,032 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:21:32,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:32,072 INFO L225 Difference]: With dead ends: 7051 [2020-12-22 10:21:32,072 INFO L226 Difference]: Without dead ends: 6975 [2020-12-22 10:21:32,076 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 10:21:32,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6975 states. [2020-12-22 10:21:32,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6975 to 6973. [2020-12-22 10:21:32,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6973 states. [2020-12-22 10:21:32,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6973 states to 6973 states and 10684 transitions. [2020-12-22 10:21:32,260 INFO L78 Accepts]: Start accepts. Automaton has 6973 states and 10684 transitions. Word has length 106 [2020-12-22 10:21:32,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:32,261 INFO L481 AbstractCegarLoop]: Abstraction has 6973 states and 10684 transitions. [2020-12-22 10:21:32,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:21:32,261 INFO L276 IsEmpty]: Start isEmpty. Operand 6973 states and 10684 transitions. [2020-12-22 10:21:32,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:21:32,268 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:32,269 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 10:21:32,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:21:32,269 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:32,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:32,270 INFO L82 PathProgramCache]: Analyzing trace with hash 326222874, now seen corresponding path program 1 times [2020-12-22 10:21:32,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:32,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053549584] [2020-12-22 10:21:32,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:32,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:32,410 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 10:21:32,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053549584] [2020-12-22 10:21:32,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:32,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:21:32,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14050703] [2020-12-22 10:21:32,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:21:32,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:32,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:21:32,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:21:32,414 INFO L87 Difference]: Start difference. First operand 6973 states and 10684 transitions. Second operand 3 states. [2020-12-22 10:21:32,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:32,487 INFO L93 Difference]: Finished difference Result 7249 states and 11124 transitions. [2020-12-22 10:21:32,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:21:32,488 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:21:32,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:32,535 INFO L225 Difference]: With dead ends: 7249 [2020-12-22 10:21:32,536 INFO L226 Difference]: Without dead ends: 7105 [2020-12-22 10:21:32,540 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 10:21:32,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7105 states. [2020-12-22 10:21:32,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7105 to 7103. [2020-12-22 10:21:32,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7103 states. [2020-12-22 10:21:32,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7103 states to 7103 states and 10891 transitions. [2020-12-22 10:21:32,732 INFO L78 Accepts]: Start accepts. Automaton has 7103 states and 10891 transitions. Word has length 106 [2020-12-22 10:21:32,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:32,734 INFO L481 AbstractCegarLoop]: Abstraction has 7103 states and 10891 transitions. [2020-12-22 10:21:32,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:21:32,734 INFO L276 IsEmpty]: Start isEmpty. Operand 7103 states and 10891 transitions. [2020-12-22 10:21:32,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:21:32,736 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:32,736 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 10:21:32,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:21:32,737 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:32,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:32,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1573731728, now seen corresponding path program 1 times [2020-12-22 10:21:32,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:32,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69687080] [2020-12-22 10:21:32,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:32,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:32,907 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 10:21:32,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69687080] [2020-12-22 10:21:32,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:32,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:21:32,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274584789] [2020-12-22 10:21:32,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:21:32,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:32,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:21:32,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:21:32,911 INFO L87 Difference]: Start difference. First operand 7103 states and 10891 transitions. Second operand 3 states. [2020-12-22 10:21:32,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:32,974 INFO L93 Difference]: Finished difference Result 7627 states and 11725 transitions. [2020-12-22 10:21:32,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:21:32,975 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:21:32,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:32,992 INFO L225 Difference]: With dead ends: 7627 [2020-12-22 10:21:32,993 INFO L226 Difference]: Without dead ends: 7353 [2020-12-22 10:21:32,997 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 10:21:33,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7353 states. [2020-12-22 10:21:33,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7353 to 7351. [2020-12-22 10:21:33,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7351 states. [2020-12-22 10:21:33,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7351 states to 7351 states and 11283 transitions. [2020-12-22 10:21:33,158 INFO L78 Accepts]: Start accepts. Automaton has 7351 states and 11283 transitions. Word has length 106 [2020-12-22 10:21:33,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:33,158 INFO L481 AbstractCegarLoop]: Abstraction has 7351 states and 11283 transitions. [2020-12-22 10:21:33,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:21:33,158 INFO L276 IsEmpty]: Start isEmpty. Operand 7351 states and 11283 transitions. [2020-12-22 10:21:33,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:21:33,160 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:33,160 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 10:21:33,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:21:33,160 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:33,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:33,161 INFO L82 PathProgramCache]: Analyzing trace with hash 832299526, now seen corresponding path program 1 times [2020-12-22 10:21:33,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:33,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274278545] [2020-12-22 10:21:33,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:33,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:33,263 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 10:21:33,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274278545] [2020-12-22 10:21:33,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:33,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:21:33,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965205416] [2020-12-22 10:21:33,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:21:33,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:33,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:21:33,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:21:33,266 INFO L87 Difference]: Start difference. First operand 7351 states and 11283 transitions. Second operand 3 states. [2020-12-22 10:21:33,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:33,345 INFO L93 Difference]: Finished difference Result 8347 states and 12861 transitions. [2020-12-22 10:21:33,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:21:33,346 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:21:33,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:33,363 INFO L225 Difference]: With dead ends: 8347 [2020-12-22 10:21:33,363 INFO L226 Difference]: Without dead ends: 7825 [2020-12-22 10:21:33,368 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 10:21:33,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7825 states. [2020-12-22 10:21:33,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7825 to 7823. [2020-12-22 10:21:33,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7823 states. [2020-12-22 10:21:33,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7823 states to 7823 states and 12023 transitions. [2020-12-22 10:21:33,524 INFO L78 Accepts]: Start accepts. Automaton has 7823 states and 12023 transitions. Word has length 106 [2020-12-22 10:21:33,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:33,525 INFO L481 AbstractCegarLoop]: Abstraction has 7823 states and 12023 transitions. [2020-12-22 10:21:33,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:21:33,525 INFO L276 IsEmpty]: Start isEmpty. Operand 7823 states and 12023 transitions. [2020-12-22 10:21:33,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:21:33,526 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:33,527 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 10:21:33,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:21:33,527 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:33,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:33,528 INFO L82 PathProgramCache]: Analyzing trace with hash 2050284924, now seen corresponding path program 1 times [2020-12-22 10:21:33,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:33,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727949772] [2020-12-22 10:21:33,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:33,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:33,725 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 10:21:33,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727949772] [2020-12-22 10:21:33,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:33,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:21:33,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426222245] [2020-12-22 10:21:33,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:21:33,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:33,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:21:33,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:21:33,728 INFO L87 Difference]: Start difference. First operand 7823 states and 12023 transitions. Second operand 10 states. [2020-12-22 10:21:34,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:34,913 INFO L93 Difference]: Finished difference Result 23727 states and 37127 transitions. [2020-12-22 10:21:34,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 10:21:34,914 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 106 [2020-12-22 10:21:34,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:34,961 INFO L225 Difference]: With dead ends: 23727 [2020-12-22 10:21:34,961 INFO L226 Difference]: Without dead ends: 22733 [2020-12-22 10:21:34,971 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 10:21:34,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22733 states. [2020-12-22 10:21:35,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22733 to 8815. [2020-12-22 10:21:35,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8815 states. [2020-12-22 10:21:35,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8815 states to 8815 states and 13559 transitions. [2020-12-22 10:21:35,313 INFO L78 Accepts]: Start accepts. Automaton has 8815 states and 13559 transitions. Word has length 106 [2020-12-22 10:21:35,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:35,314 INFO L481 AbstractCegarLoop]: Abstraction has 8815 states and 13559 transitions. [2020-12-22 10:21:35,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:21:35,314 INFO L276 IsEmpty]: Start isEmpty. Operand 8815 states and 13559 transitions. [2020-12-22 10:21:35,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:21:35,316 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:35,316 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 10:21:35,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:21:35,316 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:35,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:35,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1813103660, now seen corresponding path program 1 times [2020-12-22 10:21:35,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:35,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199746754] [2020-12-22 10:21:35,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:35,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:35,418 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 10:21:35,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199746754] [2020-12-22 10:21:35,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:35,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:21:35,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183314451] [2020-12-22 10:21:35,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:21:35,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:35,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:21:35,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:21:35,420 INFO L87 Difference]: Start difference. First operand 8815 states and 13559 transitions. Second operand 3 states. [2020-12-22 10:21:35,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:35,617 INFO L93 Difference]: Finished difference Result 11757 states and 18155 transitions. [2020-12-22 10:21:35,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:21:35,621 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:21:35,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:35,644 INFO L225 Difference]: With dead ends: 11757 [2020-12-22 10:21:35,644 INFO L226 Difference]: Without dead ends: 9771 [2020-12-22 10:21:35,651 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 10:21:35,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9771 states. [2020-12-22 10:21:35,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9771 to 9769. [2020-12-22 10:21:35,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9769 states. [2020-12-22 10:21:35,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9769 states to 9769 states and 15025 transitions. [2020-12-22 10:21:35,944 INFO L78 Accepts]: Start accepts. Automaton has 9769 states and 15025 transitions. Word has length 108 [2020-12-22 10:21:35,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:35,945 INFO L481 AbstractCegarLoop]: Abstraction has 9769 states and 15025 transitions. [2020-12-22 10:21:35,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:21:35,945 INFO L276 IsEmpty]: Start isEmpty. Operand 9769 states and 15025 transitions. [2020-12-22 10:21:35,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:21:35,946 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:35,946 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 10:21:35,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:21:35,947 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:35,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:35,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1879597172, now seen corresponding path program 1 times [2020-12-22 10:21:35,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:35,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999474440] [2020-12-22 10:21:35,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:35,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:36,368 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 10:21:36,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999474440] [2020-12-22 10:21:36,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:36,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:21:36,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508725023] [2020-12-22 10:21:36,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:21:36,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:36,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:21:36,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:21:36,371 INFO L87 Difference]: Start difference. First operand 9769 states and 15025 transitions. Second operand 10 states. [2020-12-22 10:21:37,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:37,273 INFO L93 Difference]: Finished difference Result 12709 states and 19595 transitions. [2020-12-22 10:21:37,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:21:37,273 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 108 [2020-12-22 10:21:37,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:37,295 INFO L225 Difference]: With dead ends: 12709 [2020-12-22 10:21:37,295 INFO L226 Difference]: Without dead ends: 9771 [2020-12-22 10:21:37,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:21:37,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9771 states. [2020-12-22 10:21:37,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9771 to 9769. [2020-12-22 10:21:37,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9769 states. [2020-12-22 10:21:37,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9769 states to 9769 states and 15001 transitions. [2020-12-22 10:21:37,604 INFO L78 Accepts]: Start accepts. Automaton has 9769 states and 15001 transitions. Word has length 108 [2020-12-22 10:21:37,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:37,604 INFO L481 AbstractCegarLoop]: Abstraction has 9769 states and 15001 transitions. [2020-12-22 10:21:37,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:21:37,604 INFO L276 IsEmpty]: Start isEmpty. Operand 9769 states and 15001 transitions. [2020-12-22 10:21:37,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:21:37,606 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:37,606 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 10:21:37,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:21:37,606 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:37,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:37,607 INFO L82 PathProgramCache]: Analyzing trace with hash 621051568, now seen corresponding path program 1 times [2020-12-22 10:21:37,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:37,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968841699] [2020-12-22 10:21:37,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:37,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:37,696 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 10:21:37,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968841699] [2020-12-22 10:21:37,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:37,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:21:37,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332990022] [2020-12-22 10:21:37,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:21:37,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:37,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:21:37,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:21:37,698 INFO L87 Difference]: Start difference. First operand 9769 states and 15001 transitions. Second operand 3 states. [2020-12-22 10:21:38,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:38,155 INFO L93 Difference]: Finished difference Result 15357 states and 23611 transitions. [2020-12-22 10:21:38,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:21:38,156 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:21:38,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:38,192 INFO L225 Difference]: With dead ends: 15357 [2020-12-22 10:21:38,192 INFO L226 Difference]: Without dead ends: 12419 [2020-12-22 10:21:38,204 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 10:21:38,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12419 states. [2020-12-22 10:21:38,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12419 to 12417. [2020-12-22 10:21:38,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12417 states. [2020-12-22 10:21:38,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12417 states to 12417 states and 19017 transitions. [2020-12-22 10:21:38,692 INFO L78 Accepts]: Start accepts. Automaton has 12417 states and 19017 transitions. Word has length 108 [2020-12-22 10:21:38,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:38,693 INFO L481 AbstractCegarLoop]: Abstraction has 12417 states and 19017 transitions. [2020-12-22 10:21:38,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:21:38,693 INFO L276 IsEmpty]: Start isEmpty. Operand 12417 states and 19017 transitions. [2020-12-22 10:21:38,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:21:38,695 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:38,695 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 10:21:38,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:21:38,695 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:38,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:38,696 INFO L82 PathProgramCache]: Analyzing trace with hash 894739280, now seen corresponding path program 1 times [2020-12-22 10:21:38,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:38,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407510640] [2020-12-22 10:21:38,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:38,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:38,777 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 10:21:38,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407510640] [2020-12-22 10:21:38,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:38,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:21:38,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275732870] [2020-12-22 10:21:38,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:21:38,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:38,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:21:38,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:21:38,779 INFO L87 Difference]: Start difference. First operand 12417 states and 19017 transitions. Second operand 3 states. [2020-12-22 10:21:39,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:39,494 INFO L93 Difference]: Finished difference Result 23013 states and 35179 transitions. [2020-12-22 10:21:39,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:21:39,494 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:21:39,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:39,531 INFO L225 Difference]: With dead ends: 23013 [2020-12-22 10:21:39,532 INFO L226 Difference]: Without dead ends: 17427 [2020-12-22 10:21:39,543 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 10:21:39,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17427 states. [2020-12-22 10:21:40,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17427 to 17425. [2020-12-22 10:21:40,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17425 states. [2020-12-22 10:21:40,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17425 states to 17425 states and 26521 transitions. [2020-12-22 10:21:40,245 INFO L78 Accepts]: Start accepts. Automaton has 17425 states and 26521 transitions. Word has length 108 [2020-12-22 10:21:40,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:40,246 INFO L481 AbstractCegarLoop]: Abstraction has 17425 states and 26521 transitions. [2020-12-22 10:21:40,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:21:40,246 INFO L276 IsEmpty]: Start isEmpty. Operand 17425 states and 26521 transitions. [2020-12-22 10:21:40,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:21:40,247 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:40,247 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 10:21:40,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:21:40,248 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:40,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:40,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1581156368, now seen corresponding path program 1 times [2020-12-22 10:21:40,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:40,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571492468] [2020-12-22 10:21:40,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:40,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:40,325 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 10:21:40,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571492468] [2020-12-22 10:21:40,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:40,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:21:40,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753865673] [2020-12-22 10:21:40,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:21:40,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:40,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:21:40,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:21:40,328 INFO L87 Difference]: Start difference. First operand 17425 states and 26521 transitions. Second operand 3 states. [2020-12-22 10:21:41,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:41,300 INFO L93 Difference]: Finished difference Result 37461 states and 56731 transitions. [2020-12-22 10:21:41,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:21:41,301 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:21:41,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:41,349 INFO L225 Difference]: With dead ends: 37461 [2020-12-22 10:21:41,349 INFO L226 Difference]: Without dead ends: 26867 [2020-12-22 10:21:41,368 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 10:21:41,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26867 states. [2020-12-22 10:21:42,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26867 to 26865. [2020-12-22 10:21:42,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26865 states. [2020-12-22 10:21:42,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26865 states to 26865 states and 40473 transitions. [2020-12-22 10:21:42,670 INFO L78 Accepts]: Start accepts. Automaton has 26865 states and 40473 transitions. Word has length 108 [2020-12-22 10:21:42,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:42,670 INFO L481 AbstractCegarLoop]: Abstraction has 26865 states and 40473 transitions. [2020-12-22 10:21:42,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:21:42,670 INFO L276 IsEmpty]: Start isEmpty. Operand 26865 states and 40473 transitions. [2020-12-22 10:21:42,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:21:42,672 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:42,672 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 10:21:42,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:21:42,672 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:42,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:42,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1401750384, now seen corresponding path program 1 times [2020-12-22 10:21:42,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:42,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888140867] [2020-12-22 10:21:42,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:42,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:42,748 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 10:21:42,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888140867] [2020-12-22 10:21:42,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:42,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:21:42,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407479321] [2020-12-22 10:21:42,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:21:42,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:42,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:21:42,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:21:42,751 INFO L87 Difference]: Start difference. First operand 26865 states and 40473 transitions. Second operand 3 states. [2020-12-22 10:21:44,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:44,731 INFO L93 Difference]: Finished difference Result 64629 states and 96667 transitions. [2020-12-22 10:21:44,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:21:44,731 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:21:44,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:44,809 INFO L225 Difference]: With dead ends: 64629 [2020-12-22 10:21:44,809 INFO L226 Difference]: Without dead ends: 44595 [2020-12-22 10:21:44,835 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 10:21:44,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44595 states. [2020-12-22 10:21:47,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44595 to 44593. [2020-12-22 10:21:47,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44593 states. [2020-12-22 10:21:47,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44593 states to 44593 states and 66265 transitions. [2020-12-22 10:21:47,241 INFO L78 Accepts]: Start accepts. Automaton has 44593 states and 66265 transitions. Word has length 108 [2020-12-22 10:21:47,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:47,241 INFO L481 AbstractCegarLoop]: Abstraction has 44593 states and 66265 transitions. [2020-12-22 10:21:47,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:21:47,241 INFO L276 IsEmpty]: Start isEmpty. Operand 44593 states and 66265 transitions. [2020-12-22 10:21:47,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 10:21:47,242 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:47,242 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 10:21:47,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:21:47,243 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:47,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:47,243 INFO L82 PathProgramCache]: Analyzing trace with hash 2018214719, now seen corresponding path program 1 times [2020-12-22 10:21:47,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:47,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977673881] [2020-12-22 10:21:47,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:47,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:47,369 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 10:21:47,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977673881] [2020-12-22 10:21:47,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:47,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:21:47,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974755131] [2020-12-22 10:21:47,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:21:47,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:47,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:21:47,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:21:47,371 INFO L87 Difference]: Start difference. First operand 44593 states and 66265 transitions. Second operand 8 states. [2020-12-22 10:21:51,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:51,869 INFO L93 Difference]: Finished difference Result 76760 states and 112842 transitions. [2020-12-22 10:21:51,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:21:51,870 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 109 [2020-12-22 10:21:51,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:52,019 INFO L225 Difference]: With dead ends: 76760 [2020-12-22 10:21:52,020 INFO L226 Difference]: Without dead ends: 76758 [2020-12-22 10:21:52,040 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 10:21:52,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76758 states. [2020-12-22 10:21:54,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76758 to 46129. [2020-12-22 10:21:54,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46129 states. [2020-12-22 10:21:55,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46129 states to 46129 states and 67673 transitions. [2020-12-22 10:21:55,036 INFO L78 Accepts]: Start accepts. Automaton has 46129 states and 67673 transitions. Word has length 109 [2020-12-22 10:21:55,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:55,036 INFO L481 AbstractCegarLoop]: Abstraction has 46129 states and 67673 transitions. [2020-12-22 10:21:55,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:21:55,037 INFO L276 IsEmpty]: Start isEmpty. Operand 46129 states and 67673 transitions. [2020-12-22 10:21:55,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 10:21:55,069 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:55,070 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 10:21:55,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:21:55,070 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:55,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:55,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1243757929, now seen corresponding path program 1 times [2020-12-22 10:21:55,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:55,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137294909] [2020-12-22 10:21:55,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:55,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:55,272 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 10:21:55,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137294909] [2020-12-22 10:21:55,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:55,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:21:55,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567344015] [2020-12-22 10:21:55,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:21:55,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:55,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:21:55,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:21:55,275 INFO L87 Difference]: Start difference. First operand 46129 states and 67673 transitions. Second operand 10 states. [2020-12-22 10:22:14,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:14,710 INFO L93 Difference]: Finished difference Result 368067 states and 535970 transitions. [2020-12-22 10:22:14,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:22:14,711 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 149 [2020-12-22 10:22:14,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:15,342 INFO L225 Difference]: With dead ends: 368067 [2020-12-22 10:22:15,343 INFO L226 Difference]: Without dead ends: 328769 [2020-12-22 10:22:15,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:22:15,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328769 states. [2020-12-22 10:22:23,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328769 to 85425. [2020-12-22 10:22:23,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85425 states. [2020-12-22 10:22:23,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85425 states to 85425 states and 124505 transitions. [2020-12-22 10:22:23,348 INFO L78 Accepts]: Start accepts. Automaton has 85425 states and 124505 transitions. Word has length 149 [2020-12-22 10:22:23,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:23,348 INFO L481 AbstractCegarLoop]: Abstraction has 85425 states and 124505 transitions. [2020-12-22 10:22:23,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:22:23,349 INFO L276 IsEmpty]: Start isEmpty. Operand 85425 states and 124505 transitions. [2020-12-22 10:22:23,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 10:22:23,557 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:23,558 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:22:23,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:22:23,560 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:23,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:23,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1273280147, now seen corresponding path program 1 times [2020-12-22 10:22:23,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:23,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999483858] [2020-12-22 10:22:23,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:23,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:23,833 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 10:22:23,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999483858] [2020-12-22 10:22:23,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:23,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:22:23,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331150103] [2020-12-22 10:22:23,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:22:23,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:23,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:22:23,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:22:23,842 INFO L87 Difference]: Start difference. First operand 85425 states and 124505 transitions. Second operand 10 states. [2020-12-22 10:22:47,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:47,398 INFO L93 Difference]: Finished difference Result 407363 states and 592802 transitions. [2020-12-22 10:22:47,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:22:47,399 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 149 [2020-12-22 10:22:47,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:47,899 INFO L225 Difference]: With dead ends: 407363 [2020-12-22 10:22:47,899 INFO L226 Difference]: Without dead ends: 368065 [2020-12-22 10:22:48,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:22:48,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368065 states. [2020-12-22 10:23:00,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368065 to 144433. [2020-12-22 10:23:00,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144433 states. [2020-12-22 10:23:00,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144433 states to 144433 states and 209433 transitions. [2020-12-22 10:23:00,410 INFO L78 Accepts]: Start accepts. Automaton has 144433 states and 209433 transitions. Word has length 149 [2020-12-22 10:23:00,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:00,410 INFO L481 AbstractCegarLoop]: Abstraction has 144433 states and 209433 transitions. [2020-12-22 10:23:00,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:23:00,411 INFO L276 IsEmpty]: Start isEmpty. Operand 144433 states and 209433 transitions. [2020-12-22 10:23:00,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 10:23:00,439 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:00,439 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 10:23:00,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:23:00,440 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:00,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:00,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1546967859, now seen corresponding path program 1 times [2020-12-22 10:23:00,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:00,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735372954] [2020-12-22 10:23:00,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:00,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:00,928 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 10:23:00,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735372954] [2020-12-22 10:23:00,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:00,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:23:00,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137445413] [2020-12-22 10:23:00,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:23:00,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:00,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:23:00,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:23:00,931 INFO L87 Difference]: Start difference. First operand 144433 states and 209433 transitions. Second operand 10 states. [2020-12-22 10:23:29,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:29,385 INFO L93 Difference]: Finished difference Result 446659 states and 649634 transitions. [2020-12-22 10:23:29,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:23:29,385 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 149 [2020-12-22 10:23:29,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:29,971 INFO L225 Difference]: With dead ends: 446659 [2020-12-22 10:23:29,971 INFO L226 Difference]: Without dead ends: 407361 [2020-12-22 10:23:30,362 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 10:23:30,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407361 states. [2020-12-22 10:23:45,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407361 to 183729. [2020-12-22 10:23:45,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183729 states. [2020-12-22 10:23:46,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183729 states to 183729 states and 266265 transitions. [2020-12-22 10:23:46,502 INFO L78 Accepts]: Start accepts. Automaton has 183729 states and 266265 transitions. Word has length 149 [2020-12-22 10:23:46,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:46,502 INFO L481 AbstractCegarLoop]: Abstraction has 183729 states and 266265 transitions. [2020-12-22 10:23:46,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:23:46,503 INFO L276 IsEmpty]: Start isEmpty. Operand 183729 states and 266265 transitions. [2020-12-22 10:23:46,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 10:23:46,533 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:46,534 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 10:23:46,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:23:46,534 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:46,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:46,535 INFO L82 PathProgramCache]: Analyzing trace with hash -928927789, now seen corresponding path program 1 times [2020-12-22 10:23:46,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:46,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078599598] [2020-12-22 10:23:46,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:46,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:46,762 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 10:23:46,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078599598] [2020-12-22 10:23:46,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:46,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:23:46,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729712715] [2020-12-22 10:23:46,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:23:46,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:46,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:23:46,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:23:46,765 INFO L87 Difference]: Start difference. First operand 183729 states and 266265 transitions. Second operand 10 states.