/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.UNBOUNDED.pals+Problem12_label05.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:24:35,364 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:24:35,367 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:24:35,418 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:24:35,419 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:24:35,424 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:24:35,427 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:24:35,435 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:24:35,439 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:24:35,445 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:24:35,446 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:24:35,448 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:24:35,448 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:24:35,452 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:24:35,454 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:24:35,456 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:24:35,457 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:24:35,461 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:24:35,468 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:24:35,478 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:24:35,481 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:24:35,483 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:24:35,485 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:24:35,488 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:24:35,497 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:24:35,510 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:24:35,511 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:24:35,512 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:24:35,517 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:24:35,585 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:24:35,585 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:24:35,590 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:24:35,591 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:24:35,591 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:24:35,591 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:24:35,591 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:24:35,592 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:24:35,592 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:24:35,592 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:24:35,592 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:24:35,592 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:24:35,592 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:24:35,593 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:24:35,593 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:24:35,594 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:24:35,594 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:24:35,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:24:35,595 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:24:35,595 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:24:35,595 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:24:35,595 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:24:35,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:24:35,596 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:24:35,596 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:24:35,596 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:24:36,035 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:24:36,063 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:24:36,066 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:24:36,068 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:24:36,069 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:24:36,070 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label05.c [2020-12-22 10:24:36,165 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/792f0795a/db64c8a2654345489c136d1879bd1495/FLAGb1ec275ab [2020-12-22 10:24:37,215 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:24:37,216 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label05.c [2020-12-22 10:24:37,270 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/792f0795a/db64c8a2654345489c136d1879bd1495/FLAGb1ec275ab [2020-12-22 10:24:37,611 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/792f0795a/db64c8a2654345489c136d1879bd1495 [2020-12-22 10:24:37,615 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:24:37,618 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:24:37,623 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:24:37,623 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:24:37,629 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:24:37,631 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:24:37" (1/1) ... [2020-12-22 10:24:37,633 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34380330 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:24:37, skipping insertion in model container [2020-12-22 10:24:37,633 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:24:37" (1/1) ... [2020-12-22 10:24:37,642 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:24:37,817 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:24:38,231 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.UNBOUNDED.pals+Problem12_label05.c[26875,26888] [2020-12-22 10:24:38,311 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.UNBOUNDED.pals+Problem12_label05.c[33568,33581] [2020-12-22 10:24:39,263 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:24:39,276 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:24:39,326 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.UNBOUNDED.pals+Problem12_label05.c[26875,26888] [2020-12-22 10:24:39,381 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.UNBOUNDED.pals+Problem12_label05.c[33568,33581] [2020-12-22 10:24:40,015 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:24:40,061 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:24:40,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:24:40 WrapperNode [2020-12-22 10:24:40,062 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:24:40,063 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:24:40,063 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:24:40,063 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:24:40,072 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:24:40" (1/1) ... [2020-12-22 10:24:40,146 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:24:40" (1/1) ... [2020-12-22 10:24:40,519 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:24:40,521 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:24:40,521 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:24:40,521 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:24:40,532 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:24:40" (1/1) ... [2020-12-22 10:24:40,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:24:40" (1/1) ... [2020-12-22 10:24:40,603 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:24:40" (1/1) ... [2020-12-22 10:24:40,603 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:24:40" (1/1) ... [2020-12-22 10:24:40,895 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:24:40" (1/1) ... [2020-12-22 10:24:41,009 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:24:40" (1/1) ... [2020-12-22 10:24:41,103 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:24:40" (1/1) ... [2020-12-22 10:24:41,219 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:24:41,221 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:24:41,221 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:24:41,221 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:24:41,222 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:24:40" (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 10:24:41,338 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:24:41,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:24:41,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:24:41,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:24:47,030 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:24:47,031 INFO L299 CfgBuilder]: Removed 42 assume(true) statements. [2020-12-22 10:24:47,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:24:47 BoogieIcfgContainer [2020-12-22 10:24:47,034 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:24:47,036 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:24:47,036 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:24:47,040 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:24:47,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:24:37" (1/3) ... [2020-12-22 10:24:47,041 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a876d1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:24:47, skipping insertion in model container [2020-12-22 10:24:47,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:24:40" (2/3) ... [2020-12-22 10:24:47,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a876d1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:24:47, skipping insertion in model container [2020-12-22 10:24:47,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:24:47" (3/3) ... [2020-12-22 10:24:47,043 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label05.c [2020-12-22 10:24:47,050 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:24:47,056 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:24:47,075 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:24:47,111 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:24:47,111 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:24:47,111 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:24:47,111 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:24:47,111 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:24:47,112 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:24:47,112 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:24:47,112 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:24:47,147 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states. [2020-12-22 10:24:47,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 10:24:47,159 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:47,160 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] [2020-12-22 10:24:47,160 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:47,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:47,167 INFO L82 PathProgramCache]: Analyzing trace with hash -805214309, now seen corresponding path program 1 times [2020-12-22 10:24:47,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:47,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714499873] [2020-12-22 10:24:47,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:47,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:47,457 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 10:24:47,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714499873] [2020-12-22 10:24:47,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:47,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:24:47,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684345326] [2020-12-22 10:24:47,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 10:24:47,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:47,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 10:24:47,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:24:47,488 INFO L87 Difference]: Start difference. First operand 964 states. Second operand 2 states. [2020-12-22 10:24:47,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:47,587 INFO L93 Difference]: Finished difference Result 1859 states and 3514 transitions. [2020-12-22 10:24:47,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 10:24:47,589 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 46 [2020-12-22 10:24:47,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:47,642 INFO L225 Difference]: With dead ends: 1859 [2020-12-22 10:24:47,643 INFO L226 Difference]: Without dead ends: 898 [2020-12-22 10:24:47,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:24:47,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2020-12-22 10:24:47,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 898. [2020-12-22 10:24:47,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 898 states. [2020-12-22 10:24:47,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1690 transitions. [2020-12-22 10:24:47,761 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1690 transitions. Word has length 46 [2020-12-22 10:24:47,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:47,761 INFO L481 AbstractCegarLoop]: Abstraction has 898 states and 1690 transitions. [2020-12-22 10:24:47,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 10:24:47,762 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1690 transitions. [2020-12-22 10:24:47,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 10:24:47,764 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:47,765 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 10:24:47,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:24:47,765 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:47,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:47,766 INFO L82 PathProgramCache]: Analyzing trace with hash 2117945689, now seen corresponding path program 1 times [2020-12-22 10:24:47,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:47,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428190941] [2020-12-22 10:24:47,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:47,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:47,935 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 10:24:47,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428190941] [2020-12-22 10:24:47,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:47,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:24:47,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648056929] [2020-12-22 10:24:47,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:24:47,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:47,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:24:47,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:24:47,941 INFO L87 Difference]: Start difference. First operand 898 states and 1690 transitions. Second operand 5 states. [2020-12-22 10:24:48,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:48,158 INFO L93 Difference]: Finished difference Result 979 states and 1817 transitions. [2020-12-22 10:24:48,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:24:48,159 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-12-22 10:24:48,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:48,165 INFO L225 Difference]: With dead ends: 979 [2020-12-22 10:24:48,165 INFO L226 Difference]: Without dead ends: 898 [2020-12-22 10:24:48,167 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 10:24:48,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2020-12-22 10:24:48,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 898. [2020-12-22 10:24:48,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 898 states. [2020-12-22 10:24:48,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1629 transitions. [2020-12-22 10:24:48,211 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1629 transitions. Word has length 46 [2020-12-22 10:24:48,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:48,211 INFO L481 AbstractCegarLoop]: Abstraction has 898 states and 1629 transitions. [2020-12-22 10:24:48,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:24:48,211 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1629 transitions. [2020-12-22 10:24:48,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 10:24:48,215 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:48,215 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] [2020-12-22 10:24:48,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:24:48,216 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:48,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:48,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1703499387, now seen corresponding path program 1 times [2020-12-22 10:24:48,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:48,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928209753] [2020-12-22 10:24:48,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:48,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:48,482 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 10:24:48,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928209753] [2020-12-22 10:24:48,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:48,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:24:48,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063510535] [2020-12-22 10:24:48,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:24:48,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:48,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:24:48,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:24:48,500 INFO L87 Difference]: Start difference. First operand 898 states and 1629 transitions. Second operand 3 states. [2020-12-22 10:24:54,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:54,682 INFO L93 Difference]: Finished difference Result 2402 states and 4502 transitions. [2020-12-22 10:24:54,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:24:54,684 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 60 [2020-12-22 10:24:54,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:54,695 INFO L225 Difference]: With dead ends: 2402 [2020-12-22 10:24:54,695 INFO L226 Difference]: Without dead ends: 1649 [2020-12-22 10:24:54,697 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 10:24:54,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2020-12-22 10:24:54,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 1649. [2020-12-22 10:24:54,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1649 states. [2020-12-22 10:24:54,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 2608 transitions. [2020-12-22 10:24:54,750 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 2608 transitions. Word has length 60 [2020-12-22 10:24:54,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:54,751 INFO L481 AbstractCegarLoop]: Abstraction has 1649 states and 2608 transitions. [2020-12-22 10:24:54,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:24:54,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 2608 transitions. [2020-12-22 10:24:54,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:24:54,756 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:54,756 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 10:24:54,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:24:54,757 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:54,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:54,758 INFO L82 PathProgramCache]: Analyzing trace with hash 211182729, now seen corresponding path program 1 times [2020-12-22 10:24:54,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:54,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909238300] [2020-12-22 10:24:54,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:54,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:54,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:24:54,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909238300] [2020-12-22 10:24:54,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:54,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:24:54,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105010659] [2020-12-22 10:24:54,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:24:54,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:55,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:24:55,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:24:55,001 INFO L87 Difference]: Start difference. First operand 1649 states and 2608 transitions. Second operand 3 states. [2020-12-22 10:24:55,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:55,058 INFO L93 Difference]: Finished difference Result 1797 states and 2844 transitions. [2020-12-22 10:24:55,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:24:55,059 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:24:55,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:55,070 INFO L225 Difference]: With dead ends: 1797 [2020-12-22 10:24:55,070 INFO L226 Difference]: Without dead ends: 1720 [2020-12-22 10:24:55,071 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 10:24:55,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1720 states. [2020-12-22 10:24:55,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1720 to 1718. [2020-12-22 10:24:55,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1718 states. [2020-12-22 10:24:55,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 2719 transitions. [2020-12-22 10:24:55,121 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 2719 transitions. Word has length 106 [2020-12-22 10:24:55,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:55,122 INFO L481 AbstractCegarLoop]: Abstraction has 1718 states and 2719 transitions. [2020-12-22 10:24:55,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:24:55,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 2719 transitions. [2020-12-22 10:24:55,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:24:55,126 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:55,126 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 10:24:55,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:24:55,126 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:55,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:55,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1458691583, now seen corresponding path program 1 times [2020-12-22 10:24:55,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:55,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678914965] [2020-12-22 10:24:55,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:55,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:55,296 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 10:24:55,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678914965] [2020-12-22 10:24:55,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:55,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:24:55,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378104616] [2020-12-22 10:24:55,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:24:55,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:55,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:24:55,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:24:55,301 INFO L87 Difference]: Start difference. First operand 1718 states and 2719 transitions. Second operand 3 states. [2020-12-22 10:24:55,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:55,348 INFO L93 Difference]: Finished difference Result 1998 states and 3167 transitions. [2020-12-22 10:24:55,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:24:55,348 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:24:55,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:55,358 INFO L225 Difference]: With dead ends: 1998 [2020-12-22 10:24:55,358 INFO L226 Difference]: Without dead ends: 1852 [2020-12-22 10:24:55,360 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 10:24:55,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1852 states. [2020-12-22 10:24:55,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1852 to 1850. [2020-12-22 10:24:55,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1850 states. [2020-12-22 10:24:55,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1850 states to 1850 states and 2930 transitions. [2020-12-22 10:24:55,415 INFO L78 Accepts]: Start accepts. Automaton has 1850 states and 2930 transitions. Word has length 106 [2020-12-22 10:24:55,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:55,415 INFO L481 AbstractCegarLoop]: Abstraction has 1850 states and 2930 transitions. [2020-12-22 10:24:55,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:24:55,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1850 states and 2930 transitions. [2020-12-22 10:24:55,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:24:55,417 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:55,417 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 10:24:55,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:24:55,418 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:55,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:55,418 INFO L82 PathProgramCache]: Analyzing trace with hash 717259381, now seen corresponding path program 1 times [2020-12-22 10:24:55,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:55,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318339424] [2020-12-22 10:24:55,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:55,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:55,522 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 10:24:55,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318339424] [2020-12-22 10:24:55,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:55,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:24:55,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445667149] [2020-12-22 10:24:55,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:24:55,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:55,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:24:55,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:24:55,525 INFO L87 Difference]: Start difference. First operand 1850 states and 2930 transitions. Second operand 3 states. [2020-12-22 10:24:55,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:55,583 INFO L93 Difference]: Finished difference Result 2382 states and 3780 transitions. [2020-12-22 10:24:55,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:24:55,584 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:24:55,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:55,595 INFO L225 Difference]: With dead ends: 2382 [2020-12-22 10:24:55,595 INFO L226 Difference]: Without dead ends: 2104 [2020-12-22 10:24:55,596 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 10:24:55,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2020-12-22 10:24:55,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 2102. [2020-12-22 10:24:55,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2102 states. [2020-12-22 10:24:55,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2102 states to 2102 states and 3330 transitions. [2020-12-22 10:24:55,657 INFO L78 Accepts]: Start accepts. Automaton has 2102 states and 3330 transitions. Word has length 106 [2020-12-22 10:24:55,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:55,658 INFO L481 AbstractCegarLoop]: Abstraction has 2102 states and 3330 transitions. [2020-12-22 10:24:55,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:24:55,658 INFO L276 IsEmpty]: Start isEmpty. Operand 2102 states and 3330 transitions. [2020-12-22 10:24:55,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:24:55,659 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:55,660 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 10:24:55,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:24:55,660 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:55,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:55,661 INFO L82 PathProgramCache]: Analyzing trace with hash -28323349, now seen corresponding path program 1 times [2020-12-22 10:24:55,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:55,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067272141] [2020-12-22 10:24:55,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:55,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:55,752 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 10:24:55,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067272141] [2020-12-22 10:24:55,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:55,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:24:55,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324163853] [2020-12-22 10:24:55,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:24:55,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:55,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:24:55,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:24:55,755 INFO L87 Difference]: Start difference. First operand 2102 states and 3330 transitions. Second operand 3 states. [2020-12-22 10:24:55,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:55,864 INFO L93 Difference]: Finished difference Result 3114 states and 4940 transitions. [2020-12-22 10:24:55,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:24:55,865 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:24:55,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:55,877 INFO L225 Difference]: With dead ends: 3114 [2020-12-22 10:24:55,878 INFO L226 Difference]: Without dead ends: 2584 [2020-12-22 10:24:55,879 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 10:24:55,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2020-12-22 10:24:55,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 2582. [2020-12-22 10:24:55,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2582 states. [2020-12-22 10:24:55,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2582 states to 2582 states and 4086 transitions. [2020-12-22 10:24:55,954 INFO L78 Accepts]: Start accepts. Automaton has 2582 states and 4086 transitions. Word has length 106 [2020-12-22 10:24:55,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:55,955 INFO L481 AbstractCegarLoop]: Abstraction has 2582 states and 4086 transitions. [2020-12-22 10:24:55,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:24:55,955 INFO L276 IsEmpty]: Start isEmpty. Operand 2582 states and 4086 transitions. [2020-12-22 10:24:55,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:24:55,956 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:55,957 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 10:24:55,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:24:55,957 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:55,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:55,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1968354207, now seen corresponding path program 1 times [2020-12-22 10:24:55,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:55,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475939762] [2020-12-22 10:24:55,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:55,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:56,047 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 10:24:56,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475939762] [2020-12-22 10:24:56,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:56,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:24:56,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459739218] [2020-12-22 10:24:56,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:24:56,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:56,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:24:56,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:24:56,050 INFO L87 Difference]: Start difference. First operand 2582 states and 4086 transitions. Second operand 3 states. [2020-12-22 10:24:56,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:56,146 INFO L93 Difference]: Finished difference Result 4506 states and 7128 transitions. [2020-12-22 10:24:56,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:24:56,147 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:24:56,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:56,168 INFO L225 Difference]: With dead ends: 4506 [2020-12-22 10:24:56,168 INFO L226 Difference]: Without dead ends: 3496 [2020-12-22 10:24:56,172 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 10:24:56,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3496 states. [2020-12-22 10:24:56,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3496 to 3494. [2020-12-22 10:24:56,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3494 states. [2020-12-22 10:24:56,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3494 states to 3494 states and 5510 transitions. [2020-12-22 10:24:56,293 INFO L78 Accepts]: Start accepts. Automaton has 3494 states and 5510 transitions. Word has length 106 [2020-12-22 10:24:56,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:56,294 INFO L481 AbstractCegarLoop]: Abstraction has 3494 states and 5510 transitions. [2020-12-22 10:24:56,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:24:56,294 INFO L276 IsEmpty]: Start isEmpty. Operand 3494 states and 5510 transitions. [2020-12-22 10:24:56,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:24:56,295 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:56,295 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 10:24:56,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:24:56,296 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:56,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:56,296 INFO L82 PathProgramCache]: Analyzing trace with hash 732328407, now seen corresponding path program 1 times [2020-12-22 10:24:56,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:56,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749597726] [2020-12-22 10:24:56,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:56,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:56,429 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 10:24:56,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749597726] [2020-12-22 10:24:56,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:56,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:24:56,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354822457] [2020-12-22 10:24:56,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:24:56,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:56,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:24:56,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:24:56,433 INFO L87 Difference]: Start difference. First operand 3494 states and 5510 transitions. Second operand 3 states. [2020-12-22 10:24:56,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:56,573 INFO L93 Difference]: Finished difference Result 7146 states and 11240 transitions. [2020-12-22 10:24:56,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:24:56,574 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:24:56,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:56,600 INFO L225 Difference]: With dead ends: 7146 [2020-12-22 10:24:56,600 INFO L226 Difference]: Without dead ends: 5224 [2020-12-22 10:24:56,606 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 10:24:56,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5224 states. [2020-12-22 10:24:56,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5224 to 5222. [2020-12-22 10:24:56,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5222 states. [2020-12-22 10:24:56,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5222 states to 5222 states and 8182 transitions. [2020-12-22 10:24:56,817 INFO L78 Accepts]: Start accepts. Automaton has 5222 states and 8182 transitions. Word has length 106 [2020-12-22 10:24:56,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:56,822 INFO L481 AbstractCegarLoop]: Abstraction has 5222 states and 8182 transitions. [2020-12-22 10:24:56,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:24:56,822 INFO L276 IsEmpty]: Start isEmpty. Operand 5222 states and 8182 transitions. [2020-12-22 10:24:56,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:24:56,824 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:56,824 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 10:24:56,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:24:56,824 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:56,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:56,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1070121549, now seen corresponding path program 1 times [2020-12-22 10:24:56,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:56,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658090079] [2020-12-22 10:24:56,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:56,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:56,929 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 10:24:56,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658090079] [2020-12-22 10:24:56,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:56,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:24:56,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316211513] [2020-12-22 10:24:56,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:24:56,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:56,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:24:56,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:24:56,934 INFO L87 Difference]: Start difference. First operand 5222 states and 8182 transitions. Second operand 3 states. [2020-12-22 10:24:57,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:57,169 INFO L93 Difference]: Finished difference Result 12138 states and 18936 transitions. [2020-12-22 10:24:57,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:24:57,177 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:24:57,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:57,227 INFO L225 Difference]: With dead ends: 12138 [2020-12-22 10:24:57,227 INFO L226 Difference]: Without dead ends: 8488 [2020-12-22 10:24:57,234 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 10:24:57,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8488 states. [2020-12-22 10:24:57,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8488 to 8486. [2020-12-22 10:24:57,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8486 states. [2020-12-22 10:24:57,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8486 states to 8486 states and 13174 transitions. [2020-12-22 10:24:57,552 INFO L78 Accepts]: Start accepts. Automaton has 8486 states and 13174 transitions. Word has length 106 [2020-12-22 10:24:57,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:57,553 INFO L481 AbstractCegarLoop]: Abstraction has 8486 states and 13174 transitions. [2020-12-22 10:24:57,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:24:57,553 INFO L276 IsEmpty]: Start isEmpty. Operand 8486 states and 13174 transitions. [2020-12-22 10:24:57,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:24:57,554 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:57,555 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 10:24:57,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:24:57,555 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:57,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:57,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1478760321, now seen corresponding path program 1 times [2020-12-22 10:24:57,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:57,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631451772] [2020-12-22 10:24:57,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:57,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:57,831 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 10:24:57,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631451772] [2020-12-22 10:24:57,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:57,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:24:57,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470883131] [2020-12-22 10:24:57,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:24:57,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:57,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:24:57,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:24:57,834 INFO L87 Difference]: Start difference. First operand 8486 states and 13174 transitions. Second operand 10 states. [2020-12-22 10:25:02,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:25:02,529 INFO L93 Difference]: Finished difference Result 119110 states and 184198 transitions. [2020-12-22 10:25:02,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 10:25:02,530 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 106 [2020-12-22 10:25:02,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:25:02,882 INFO L225 Difference]: With dead ends: 119110 [2020-12-22 10:25:02,883 INFO L226 Difference]: Without dead ends: 112196 [2020-12-22 10:25:02,926 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 10:25:03,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112196 states. [2020-12-22 10:25:04,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112196 to 15398. [2020-12-22 10:25:04,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15398 states. [2020-12-22 10:25:04,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15398 states to 15398 states and 23606 transitions. [2020-12-22 10:25:04,916 INFO L78 Accepts]: Start accepts. Automaton has 15398 states and 23606 transitions. Word has length 106 [2020-12-22 10:25:04,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:25:04,916 INFO L481 AbstractCegarLoop]: Abstraction has 15398 states and 23606 transitions. [2020-12-22 10:25:04,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:25:04,916 INFO L276 IsEmpty]: Start isEmpty. Operand 15398 states and 23606 transitions. [2020-12-22 10:25:04,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:25:04,918 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:25:04,918 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 10:25:04,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:25:04,919 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:25:04,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:25:04,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1961193007, now seen corresponding path program 1 times [2020-12-22 10:25:04,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:25:04,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507226121] [2020-12-22 10:25:04,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:25:04,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:25:05,030 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 10:25:05,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507226121] [2020-12-22 10:25:05,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:25:05,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:25:05,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536267508] [2020-12-22 10:25:05,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:25:05,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:25:05,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:25:05,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:25:05,033 INFO L87 Difference]: Start difference. First operand 15398 states and 23606 transitions. Second operand 3 states. [2020-12-22 10:25:06,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:25:06,477 INFO L93 Difference]: Finished difference Result 41642 states and 63416 transitions. [2020-12-22 10:25:06,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:25:06,478 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:25:06,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:25:06,544 INFO L225 Difference]: With dead ends: 41642 [2020-12-22 10:25:06,544 INFO L226 Difference]: Without dead ends: 27816 [2020-12-22 10:25:06,566 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 10:25:06,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27816 states. [2020-12-22 10:25:08,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27816 to 27558. [2020-12-22 10:25:08,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27558 states. [2020-12-22 10:25:08,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27558 states to 27558 states and 41398 transitions. [2020-12-22 10:25:08,151 INFO L78 Accepts]: Start accepts. Automaton has 27558 states and 41398 transitions. Word has length 108 [2020-12-22 10:25:08,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:25:08,152 INFO L481 AbstractCegarLoop]: Abstraction has 27558 states and 41398 transitions. [2020-12-22 10:25:08,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:25:08,152 INFO L276 IsEmpty]: Start isEmpty. Operand 27558 states and 41398 transitions. [2020-12-22 10:25:08,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:25:08,154 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:25:08,154 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 10:25:08,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:25:08,154 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:25:08,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:25:08,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1894699495, now seen corresponding path program 1 times [2020-12-22 10:25:08,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:25:08,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217892273] [2020-12-22 10:25:08,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:25:08,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:25:08,608 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 10:25:08,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217892273] [2020-12-22 10:25:08,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:25:08,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:25:08,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154351663] [2020-12-22 10:25:08,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:25:08,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:25:08,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:25:08,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:25:08,618 INFO L87 Difference]: Start difference. First operand 27558 states and 41398 transitions. Second operand 10 states. [2020-12-22 10:25:08,998 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-12-22 10:25:09,267 WARN L197 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-12-22 10:25:11,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:25:11,084 INFO L93 Difference]: Finished difference Result 53546 states and 80312 transitions. [2020-12-22 10:25:11,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:25:11,085 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 108 [2020-12-22 10:25:11,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:25:11,142 INFO L225 Difference]: With dead ends: 53546 [2020-12-22 10:25:11,142 INFO L226 Difference]: Without dead ends: 27560 [2020-12-22 10:25:11,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:25:11,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27560 states. [2020-12-22 10:25:12,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27560 to 27558. [2020-12-22 10:25:12,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27558 states. [2020-12-22 10:25:12,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27558 states to 27558 states and 41142 transitions. [2020-12-22 10:25:12,649 INFO L78 Accepts]: Start accepts. Automaton has 27558 states and 41142 transitions. Word has length 108 [2020-12-22 10:25:12,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:25:12,649 INFO L481 AbstractCegarLoop]: Abstraction has 27558 states and 41142 transitions. [2020-12-22 10:25:12,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:25:12,649 INFO L276 IsEmpty]: Start isEmpty. Operand 27558 states and 41142 transitions. [2020-12-22 10:25:12,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 10:25:12,651 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:25:12,651 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 10:25:12,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:25:12,651 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:25:12,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:25:12,652 INFO L82 PathProgramCache]: Analyzing trace with hash 979135041, now seen corresponding path program 1 times [2020-12-22 10:25:12,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:25:12,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530317551] [2020-12-22 10:25:12,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:25:12,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:25:12,800 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 10:25:12,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530317551] [2020-12-22 10:25:12,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:25:12,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:25:12,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382470942] [2020-12-22 10:25:12,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:25:12,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:25:12,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:25:12,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:25:12,803 INFO L87 Difference]: Start difference. First operand 27558 states and 41142 transitions. Second operand 6 states. [2020-12-22 10:25:14,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:25:14,697 INFO L93 Difference]: Finished difference Result 53544 states and 79799 transitions. [2020-12-22 10:25:14,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:25:14,698 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 109 [2020-12-22 10:25:14,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:25:14,743 INFO L225 Difference]: With dead ends: 53544 [2020-12-22 10:25:14,744 INFO L226 Difference]: Without dead ends: 27558 [2020-12-22 10:25:14,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:25:14,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27558 states. [2020-12-22 10:25:16,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27558 to 27558. [2020-12-22 10:25:16,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27558 states. [2020-12-22 10:25:16,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27558 states to 27558 states and 40886 transitions. [2020-12-22 10:25:16,559 INFO L78 Accepts]: Start accepts. Automaton has 27558 states and 40886 transitions. Word has length 109 [2020-12-22 10:25:16,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:25:16,560 INFO L481 AbstractCegarLoop]: Abstraction has 27558 states and 40886 transitions. [2020-12-22 10:25:16,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:25:16,560 INFO L276 IsEmpty]: Start isEmpty. Operand 27558 states and 40886 transitions. [2020-12-22 10:25:16,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 10:25:16,561 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:25:16,561 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 10:25:16,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:25:16,562 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:25:16,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:25:16,562 INFO L82 PathProgramCache]: Analyzing trace with hash 278070463, now seen corresponding path program 1 times [2020-12-22 10:25:16,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:25:16,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66463528] [2020-12-22 10:25:16,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:25:16,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:25:16,699 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 10:25:16,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66463528] [2020-12-22 10:25:16,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:25:16,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:25:16,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626712045] [2020-12-22 10:25:16,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:25:16,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:25:16,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:25:16,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:25:16,701 INFO L87 Difference]: Start difference. First operand 27558 states and 40886 transitions. Second operand 8 states. [2020-12-22 10:25:20,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:25:20,109 INFO L93 Difference]: Finished difference Result 46928 states and 69099 transitions. [2020-12-22 10:25:20,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:25:20,110 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 109 [2020-12-22 10:25:20,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:25:20,177 INFO L225 Difference]: With dead ends: 46928 [2020-12-22 10:25:20,177 INFO L226 Difference]: Without dead ends: 46926 [2020-12-22 10:25:20,188 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 10:25:20,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46926 states. [2020-12-22 10:25:21,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46926 to 28326. [2020-12-22 10:25:21,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28326 states. [2020-12-22 10:25:22,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28326 states to 28326 states and 41526 transitions. [2020-12-22 10:25:22,035 INFO L78 Accepts]: Start accepts. Automaton has 28326 states and 41526 transitions. Word has length 109 [2020-12-22 10:25:22,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:25:22,036 INFO L481 AbstractCegarLoop]: Abstraction has 28326 states and 41526 transitions. [2020-12-22 10:25:22,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:25:22,036 INFO L276 IsEmpty]: Start isEmpty. Operand 28326 states and 41526 transitions. [2020-12-22 10:25:22,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 10:25:22,038 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:25:22,039 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, 1] [2020-12-22 10:25:22,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:25:22,039 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:25:22,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:25:22,039 INFO L82 PathProgramCache]: Analyzing trace with hash 171324818, now seen corresponding path program 1 times [2020-12-22 10:25:22,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:25:22,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682367108] [2020-12-22 10:25:22,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:25:22,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:25:22,133 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 10:25:22,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682367108] [2020-12-22 10:25:22,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:25:22,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:25:22,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126968680] [2020-12-22 10:25:22,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:25:22,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:25:22,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:25:22,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:25:22,138 INFO L87 Difference]: Start difference. First operand 28326 states and 41526 transitions. Second operand 3 states. [2020-12-22 10:25:24,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:25:24,451 INFO L93 Difference]: Finished difference Result 55469 states and 81468 transitions. [2020-12-22 10:25:24,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:25:24,452 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 110 [2020-12-22 10:25:24,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:25:24,501 INFO L225 Difference]: With dead ends: 55469 [2020-12-22 10:25:24,501 INFO L226 Difference]: Without dead ends: 40874 [2020-12-22 10:25:24,514 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 10:25:24,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40874 states. [2020-12-22 10:25:27,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40874 to 40872. [2020-12-22 10:25:27,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40872 states. [2020-12-22 10:25:27,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40872 states to 40872 states and 59576 transitions. [2020-12-22 10:25:27,089 INFO L78 Accepts]: Start accepts. Automaton has 40872 states and 59576 transitions. Word has length 110 [2020-12-22 10:25:27,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:25:27,089 INFO L481 AbstractCegarLoop]: Abstraction has 40872 states and 59576 transitions. [2020-12-22 10:25:27,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:25:27,089 INFO L276 IsEmpty]: Start isEmpty. Operand 40872 states and 59576 transitions. [2020-12-22 10:25:27,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 10:25:27,094 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:25:27,094 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:25:27,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:25:27,095 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:25:27,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:25:27,095 INFO L82 PathProgramCache]: Analyzing trace with hash 163658333, now seen corresponding path program 1 times [2020-12-22 10:25:27,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:25:27,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371871108] [2020-12-22 10:25:27,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:25:27,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:25:27,177 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:25:27,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371871108] [2020-12-22 10:25:27,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:25:27,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:25:27,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584972034] [2020-12-22 10:25:27,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:25:27,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:25:27,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:25:27,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:25:27,179 INFO L87 Difference]: Start difference. First operand 40872 states and 59576 transitions. Second operand 3 states. [2020-12-22 10:25:35,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:25:35,534 INFO L93 Difference]: Finished difference Result 43880 states and 64408 transitions. [2020-12-22 10:25:35,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:25:35,536 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 135 [2020-12-22 10:25:35,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:25:35,574 INFO L225 Difference]: With dead ends: 43880 [2020-12-22 10:25:35,575 INFO L226 Difference]: Without dead ends: 42376 [2020-12-22 10:25:35,582 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 10:25:35,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42376 states. [2020-12-22 10:25:37,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42376 to 42374. [2020-12-22 10:25:37,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42374 states. [2020-12-22 10:25:37,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42374 states to 42374 states and 61547 transitions. [2020-12-22 10:25:37,940 INFO L78 Accepts]: Start accepts. Automaton has 42374 states and 61547 transitions. Word has length 135 [2020-12-22 10:25:37,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:25:37,941 INFO L481 AbstractCegarLoop]: Abstraction has 42374 states and 61547 transitions. [2020-12-22 10:25:37,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:25:37,941 INFO L276 IsEmpty]: Start isEmpty. Operand 42374 states and 61547 transitions. [2020-12-22 10:25:37,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:25:37,961 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:25:37,961 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:25:37,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:25:37,962 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:25:37,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:25:37,962 INFO L82 PathProgramCache]: Analyzing trace with hash 45078639, now seen corresponding path program 1 times [2020-12-22 10:25:37,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:25:37,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279156936] [2020-12-22 10:25:37,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:25:37,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:25:38,178 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 10:25:38,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279156936] [2020-12-22 10:25:38,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:25:38,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:25:38,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159807877] [2020-12-22 10:25:38,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:25:38,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:25:38,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:25:38,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:25:38,181 INFO L87 Difference]: Start difference. First operand 42374 states and 61547 transitions. Second operand 10 states. [2020-12-22 10:25:56,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:25:56,813 INFO L93 Difference]: Finished difference Result 364312 states and 528884 transitions. [2020-12-22 10:25:56,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:25:56,814 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 148 [2020-12-22 10:25:56,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:25:57,323 INFO L225 Difference]: With dead ends: 364312 [2020-12-22 10:25:57,323 INFO L226 Difference]: Without dead ends: 325014 [2020-12-22 10:25:57,433 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 10:25:57,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325014 states. [2020-12-22 10:26:05,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325014 to 81670. [2020-12-22 10:26:05,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81670 states. [2020-12-22 10:26:05,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81670 states to 81670 states and 118251 transitions. [2020-12-22 10:26:05,239 INFO L78 Accepts]: Start accepts. Automaton has 81670 states and 118251 transitions. Word has length 148 [2020-12-22 10:26:05,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:05,240 INFO L481 AbstractCegarLoop]: Abstraction has 81670 states and 118251 transitions. [2020-12-22 10:26:05,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:26:05,240 INFO L276 IsEmpty]: Start isEmpty. Operand 81670 states and 118251 transitions. [2020-12-22 10:26:05,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:26:05,261 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:05,261 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:05,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:26:05,262 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:05,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:05,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1723704177, now seen corresponding path program 1 times [2020-12-22 10:26:05,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:05,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992993744] [2020-12-22 10:26:05,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:05,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:05,472 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:26:05,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992993744] [2020-12-22 10:26:05,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:05,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:26:05,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484534934] [2020-12-22 10:26:05,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:26:05,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:05,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:26:05,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:26:05,474 INFO L87 Difference]: Start difference. First operand 81670 states and 118251 transitions. Second operand 10 states. [2020-12-22 10:26:28,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:28,950 INFO L93 Difference]: Finished difference Result 403608 states and 585588 transitions. [2020-12-22 10:26:28,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:26:28,951 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 148 [2020-12-22 10:26:28,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:29,713 INFO L225 Difference]: With dead ends: 403608 [2020-12-22 10:26:29,713 INFO L226 Difference]: Without dead ends: 364310 [2020-12-22 10:26:29,838 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 10:26:30,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364310 states. [2020-12-22 10:26:41,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364310 to 140678. [2020-12-22 10:26:41,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140678 states. [2020-12-22 10:26:41,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140678 states to 140678 states and 202987 transitions. [2020-12-22 10:26:41,862 INFO L78 Accepts]: Start accepts. Automaton has 140678 states and 202987 transitions. Word has length 148 [2020-12-22 10:26:41,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:41,862 INFO L481 AbstractCegarLoop]: Abstraction has 140678 states and 202987 transitions. [2020-12-22 10:26:41,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:26:41,862 INFO L276 IsEmpty]: Start isEmpty. Operand 140678 states and 202987 transitions. [2020-12-22 10:26:41,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:26:41,891 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:41,891 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:41,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:26:41,892 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:41,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:41,892 INFO L82 PathProgramCache]: Analyzing trace with hash -592064337, now seen corresponding path program 1 times [2020-12-22 10:26:41,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:41,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855222092] [2020-12-22 10:26:41,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:41,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:42,383 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 10:26:42,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855222092] [2020-12-22 10:26:42,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:42,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:26:42,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275324241] [2020-12-22 10:26:42,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:26:42,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:42,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:26:42,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:26:42,388 INFO L87 Difference]: Start difference. First operand 140678 states and 202987 transitions. Second operand 10 states. [2020-12-22 10:27:10,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:10,503 INFO L93 Difference]: Finished difference Result 442904 states and 642292 transitions. [2020-12-22 10:27:10,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:27:10,504 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 148 [2020-12-22 10:27:10,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:11,331 INFO L225 Difference]: With dead ends: 442904 [2020-12-22 10:27:11,331 INFO L226 Difference]: Without dead ends: 403606 [2020-12-22 10:27:11,446 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 10:27:11,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403606 states. [2020-12-22 10:27:27,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403606 to 179974. [2020-12-22 10:27:27,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179974 states. [2020-12-22 10:27:27,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179974 states to 179974 states and 259691 transitions. [2020-12-22 10:27:27,810 INFO L78 Accepts]: Start accepts. Automaton has 179974 states and 259691 transitions. Word has length 148 [2020-12-22 10:27:27,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:27,811 INFO L481 AbstractCegarLoop]: Abstraction has 179974 states and 259691 transitions. [2020-12-22 10:27:27,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:27:27,811 INFO L276 IsEmpty]: Start isEmpty. Operand 179974 states and 259691 transitions. [2020-12-22 10:27:27,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:27:27,837 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:27,837 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:27,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:27:27,837 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:27,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:27,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1827523377, now seen corresponding path program 1 times [2020-12-22 10:27:27,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:27,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578494280] [2020-12-22 10:27:27,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:27,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:28,061 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:27:28,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578494280] [2020-12-22 10:27:28,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:27:28,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:27:28,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868754801] [2020-12-22 10:27:28,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:27:28,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:28,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:27:28,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:27:28,064 INFO L87 Difference]: Start difference. First operand 179974 states and 259691 transitions. Second operand 10 states.