/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/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:37:46,273 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:37:46,278 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:37:46,336 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:37:46,337 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:37:46,341 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:37:46,345 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:37:46,354 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:37:46,357 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:37:46,363 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:37:46,365 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:37:46,366 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:37:46,367 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:37:46,370 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:37:46,373 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:37:46,375 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:37:46,376 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:37:46,380 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:37:46,387 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:37:46,396 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:37:46,398 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:37:46,401 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:37:46,402 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:37:46,405 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:37:46,436 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:37:46,450 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:37:46,451 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:37:46,452 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:37:46,453 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:37:46,509 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:37:46,510 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:37:46,511 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:37:46,512 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:37:46,512 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:37:46,512 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:37:46,512 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:37:46,513 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:37:46,513 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:37:46,513 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:37:46,513 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:37:46,513 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:37:46,514 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:37:46,514 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:37:46,514 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:37:46,514 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:37:46,515 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:37:46,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:37:46,515 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:37:46,515 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:37:46,516 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:37:46,516 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:37:46,516 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:37:46,516 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:37:46,517 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:37:46,517 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:37:46,969 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:37:46,999 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:37:47,002 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:37:47,004 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:37:47,005 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:37:47,006 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-12-22 08:37:47,093 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6f85b014/340c31480f6840feba3794173d63daf0/FLAG08a366ed6 [2020-12-22 08:37:47,848 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:37:47,848 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-12-22 08:37:47,866 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6f85b014/340c31480f6840feba3794173d63daf0/FLAG08a366ed6 [2020-12-22 08:37:48,105 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6f85b014/340c31480f6840feba3794173d63daf0 [2020-12-22 08:37:48,113 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:37:48,116 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:37:48,120 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:37:48,120 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:37:48,124 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:37:48,125 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:37:48" (1/1) ... [2020-12-22 08:37:48,128 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dd24b2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:37:48, skipping insertion in model container [2020-12-22 08:37:48,128 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:37:48" (1/1) ... [2020-12-22 08:37:48,142 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:37:48,210 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:37:48,500 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/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[6776,6789] [2020-12-22 08:37:48,520 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/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[9087,9100] [2020-12-22 08:37:48,536 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:37:48,553 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:37:48,636 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/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[6776,6789] [2020-12-22 08:37:48,668 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/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[9087,9100] [2020-12-22 08:37:48,694 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:37:48,735 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:37:48,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:37:48 WrapperNode [2020-12-22 08:37:48,736 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:37:48,739 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:37:48,740 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:37:48,740 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:37:48,754 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:37:48" (1/1) ... [2020-12-22 08:37:48,789 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:37:48" (1/1) ... [2020-12-22 08:37:48,835 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:37:48,837 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:37:48,837 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:37:48,837 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:37:48,851 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:37:48" (1/1) ... [2020-12-22 08:37:48,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:37:48" (1/1) ... [2020-12-22 08:37:48,855 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:37:48" (1/1) ... [2020-12-22 08:37:48,856 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:37:48" (1/1) ... [2020-12-22 08:37:48,864 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:37:48" (1/1) ... [2020-12-22 08:37:48,871 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:37:48" (1/1) ... [2020-12-22 08:37:48,874 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:37:48" (1/1) ... [2020-12-22 08:37:48,879 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:37:48,880 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:37:48,881 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:37:48,881 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:37:48,882 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:37:48" (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 08:37:49,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:37:49,021 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:37:49,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:37:49,022 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:37:50,046 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:37:50,047 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:37:50,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:37:50 BoogieIcfgContainer [2020-12-22 08:37:50,049 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:37:50,051 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:37:50,051 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:37:50,055 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:37:50,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:37:48" (1/3) ... [2020-12-22 08:37:50,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d47d70d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:37:50, skipping insertion in model container [2020-12-22 08:37:50,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:37:48" (2/3) ... [2020-12-22 08:37:50,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d47d70d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:37:50, skipping insertion in model container [2020-12-22 08:37:50,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:37:50" (3/3) ... [2020-12-22 08:37:50,059 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-12-22 08:37:50,067 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:37:50,073 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 08:37:50,095 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 08:37:50,127 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:37:50,127 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:37:50,128 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:37:50,128 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:37:50,128 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:37:50,128 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:37:50,128 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:37:50,129 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:37:50,150 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states. [2020-12-22 08:37:50,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 08:37:50,159 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:37:50,161 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] [2020-12-22 08:37:50,161 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:37:50,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:37:50,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1038847250, now seen corresponding path program 1 times [2020-12-22 08:37:50,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:37:50,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568602961] [2020-12-22 08:37:50,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:37:50,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:37:50,644 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 08:37:50,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568602961] [2020-12-22 08:37:50,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:37:50,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:37:50,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870632044] [2020-12-22 08:37:50,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:37:50,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:37:50,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:37:50,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:37:50,673 INFO L87 Difference]: Start difference. First operand 106 states. Second operand 3 states. [2020-12-22 08:37:50,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:37:50,789 INFO L93 Difference]: Finished difference Result 204 states and 332 transitions. [2020-12-22 08:37:50,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:37:50,791 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-12-22 08:37:50,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:37:50,806 INFO L225 Difference]: With dead ends: 204 [2020-12-22 08:37:50,806 INFO L226 Difference]: Without dead ends: 153 [2020-12-22 08:37:50,810 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 08:37:50,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-12-22 08:37:50,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 151. [2020-12-22 08:37:50,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-12-22 08:37:50,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 212 transitions. [2020-12-22 08:37:50,877 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 212 transitions. Word has length 48 [2020-12-22 08:37:50,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:37:50,880 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 212 transitions. [2020-12-22 08:37:50,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:37:50,881 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 212 transitions. [2020-12-22 08:37:50,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 08:37:50,883 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:37:50,883 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] [2020-12-22 08:37:50,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:37:50,885 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:37:50,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:37:50,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1964840261, now seen corresponding path program 1 times [2020-12-22 08:37:50,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:37:50,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023673285] [2020-12-22 08:37:50,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:37:50,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:37:51,075 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 08:37:51,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023673285] [2020-12-22 08:37:51,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:37:51,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:37:51,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328833642] [2020-12-22 08:37:51,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:37:51,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:37:51,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:37:51,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:37:51,080 INFO L87 Difference]: Start difference. First operand 151 states and 212 transitions. Second operand 3 states. [2020-12-22 08:37:51,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:37:51,159 INFO L93 Difference]: Finished difference Result 276 states and 401 transitions. [2020-12-22 08:37:51,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:37:51,160 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 49 [2020-12-22 08:37:51,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:37:51,163 INFO L225 Difference]: With dead ends: 276 [2020-12-22 08:37:51,163 INFO L226 Difference]: Without dead ends: 195 [2020-12-22 08:37:51,165 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 08:37:51,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-12-22 08:37:51,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 193. [2020-12-22 08:37:51,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-12-22 08:37:51,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 275 transitions. [2020-12-22 08:37:51,193 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 275 transitions. Word has length 49 [2020-12-22 08:37:51,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:37:51,194 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 275 transitions. [2020-12-22 08:37:51,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:37:51,194 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 275 transitions. [2020-12-22 08:37:51,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 08:37:51,196 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:37:51,196 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] [2020-12-22 08:37:51,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:37:51,196 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:37:51,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:37:51,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1398279763, now seen corresponding path program 1 times [2020-12-22 08:37:51,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:37:51,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107099894] [2020-12-22 08:37:51,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:37:51,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:37:51,315 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 08:37:51,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107099894] [2020-12-22 08:37:51,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:37:51,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:37:51,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110092824] [2020-12-22 08:37:51,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:37:51,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:37:51,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:37:51,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:37:51,320 INFO L87 Difference]: Start difference. First operand 193 states and 275 transitions. Second operand 5 states. [2020-12-22 08:37:51,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:37:51,543 INFO L93 Difference]: Finished difference Result 363 states and 526 transitions. [2020-12-22 08:37:51,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:37:51,545 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 50 [2020-12-22 08:37:51,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:37:51,551 INFO L225 Difference]: With dead ends: 363 [2020-12-22 08:37:51,551 INFO L226 Difference]: Without dead ends: 193 [2020-12-22 08:37:51,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:37:51,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-12-22 08:37:51,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2020-12-22 08:37:51,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-12-22 08:37:51,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 271 transitions. [2020-12-22 08:37:51,614 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 271 transitions. Word has length 50 [2020-12-22 08:37:51,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:37:51,615 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 271 transitions. [2020-12-22 08:37:51,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:37:51,616 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 271 transitions. [2020-12-22 08:37:51,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 08:37:51,617 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:37:51,618 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] [2020-12-22 08:37:51,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:37:51,620 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:37:51,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:37:51,622 INFO L82 PathProgramCache]: Analyzing trace with hash -953763925, now seen corresponding path program 1 times [2020-12-22 08:37:51,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:37:51,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123657096] [2020-12-22 08:37:51,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:37:51,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:37:51,740 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 08:37:51,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123657096] [2020-12-22 08:37:51,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:37:51,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:37:51,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732563744] [2020-12-22 08:37:51,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:37:51,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:37:51,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:37:51,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:37:51,744 INFO L87 Difference]: Start difference. First operand 193 states and 271 transitions. Second operand 5 states. [2020-12-22 08:37:51,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:37:51,912 INFO L93 Difference]: Finished difference Result 355 states and 509 transitions. [2020-12-22 08:37:51,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:37:51,913 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 51 [2020-12-22 08:37:51,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:37:51,915 INFO L225 Difference]: With dead ends: 355 [2020-12-22 08:37:51,915 INFO L226 Difference]: Without dead ends: 193 [2020-12-22 08:37:51,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:37:51,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-12-22 08:37:51,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2020-12-22 08:37:51,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-12-22 08:37:51,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 267 transitions. [2020-12-22 08:37:51,946 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 267 transitions. Word has length 51 [2020-12-22 08:37:51,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:37:51,946 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 267 transitions. [2020-12-22 08:37:51,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:37:51,947 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 267 transitions. [2020-12-22 08:37:51,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 08:37:51,948 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:37:51,948 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] [2020-12-22 08:37:51,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:37:51,949 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:37:51,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:37:51,950 INFO L82 PathProgramCache]: Analyzing trace with hash -380697261, now seen corresponding path program 1 times [2020-12-22 08:37:51,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:37:51,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979948862] [2020-12-22 08:37:51,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:37:51,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:37:52,102 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 08:37:52,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979948862] [2020-12-22 08:37:52,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:37:52,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:37:52,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063079032] [2020-12-22 08:37:52,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:37:52,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:37:52,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:37:52,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:37:52,107 INFO L87 Difference]: Start difference. First operand 193 states and 267 transitions. Second operand 5 states. [2020-12-22 08:37:52,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:37:52,274 INFO L93 Difference]: Finished difference Result 359 states and 506 transitions. [2020-12-22 08:37:52,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:37:52,275 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2020-12-22 08:37:52,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:37:52,277 INFO L225 Difference]: With dead ends: 359 [2020-12-22 08:37:52,277 INFO L226 Difference]: Without dead ends: 193 [2020-12-22 08:37:52,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:37:52,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-12-22 08:37:52,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2020-12-22 08:37:52,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-12-22 08:37:52,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 263 transitions. [2020-12-22 08:37:52,302 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 263 transitions. Word has length 52 [2020-12-22 08:37:52,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:37:52,303 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 263 transitions. [2020-12-22 08:37:52,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:37:52,303 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 263 transitions. [2020-12-22 08:37:52,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 08:37:52,304 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:37:52,304 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] [2020-12-22 08:37:52,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:37:52,305 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:37:52,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:37:52,305 INFO L82 PathProgramCache]: Analyzing trace with hash -154878177, now seen corresponding path program 1 times [2020-12-22 08:37:52,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:37:52,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620619730] [2020-12-22 08:37:52,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:37:52,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:37:52,426 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 08:37:52,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620619730] [2020-12-22 08:37:52,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:37:52,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:37:52,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967413037] [2020-12-22 08:37:52,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:37:52,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:37:52,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:37:52,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:37:52,434 INFO L87 Difference]: Start difference. First operand 193 states and 263 transitions. Second operand 5 states. [2020-12-22 08:37:52,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:37:52,577 INFO L93 Difference]: Finished difference Result 591 states and 834 transitions. [2020-12-22 08:37:52,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:37:52,578 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-12-22 08:37:52,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:37:52,582 INFO L225 Difference]: With dead ends: 591 [2020-12-22 08:37:52,582 INFO L226 Difference]: Without dead ends: 473 [2020-12-22 08:37:52,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:37:52,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2020-12-22 08:37:52,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 284. [2020-12-22 08:37:52,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-12-22 08:37:52,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 396 transitions. [2020-12-22 08:37:52,635 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 396 transitions. Word has length 53 [2020-12-22 08:37:52,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:37:52,637 INFO L481 AbstractCegarLoop]: Abstraction has 284 states and 396 transitions. [2020-12-22 08:37:52,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:37:52,638 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 396 transitions. [2020-12-22 08:37:52,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 08:37:52,643 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:37:52,644 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] [2020-12-22 08:37:52,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:37:52,646 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:37:52,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:37:52,653 INFO L82 PathProgramCache]: Analyzing trace with hash -27056057, now seen corresponding path program 1 times [2020-12-22 08:37:52,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:37:52,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870401027] [2020-12-22 08:37:52,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:37:52,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:37:52,825 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 08:37:52,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870401027] [2020-12-22 08:37:52,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:37:52,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:37:52,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009371764] [2020-12-22 08:37:52,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:37:52,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:37:52,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:37:52,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:37:52,842 INFO L87 Difference]: Start difference. First operand 284 states and 396 transitions. Second operand 5 states. [2020-12-22 08:37:52,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:37:52,977 INFO L93 Difference]: Finished difference Result 672 states and 952 transitions. [2020-12-22 08:37:52,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:37:52,978 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-12-22 08:37:52,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:37:52,981 INFO L225 Difference]: With dead ends: 672 [2020-12-22 08:37:52,982 INFO L226 Difference]: Without dead ends: 554 [2020-12-22 08:37:52,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:37:52,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-12-22 08:37:53,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 412. [2020-12-22 08:37:53,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2020-12-22 08:37:53,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 581 transitions. [2020-12-22 08:37:53,032 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 581 transitions. Word has length 53 [2020-12-22 08:37:53,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:37:53,033 INFO L481 AbstractCegarLoop]: Abstraction has 412 states and 581 transitions. [2020-12-22 08:37:53,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:37:53,033 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 581 transitions. [2020-12-22 08:37:53,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 08:37:53,034 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:37:53,034 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] [2020-12-22 08:37:53,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:37:53,035 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:37:53,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:37:53,035 INFO L82 PathProgramCache]: Analyzing trace with hash 477975091, now seen corresponding path program 1 times [2020-12-22 08:37:53,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:37:53,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835555673] [2020-12-22 08:37:53,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:37:53,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:37:53,178 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 08:37:53,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835555673] [2020-12-22 08:37:53,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:37:53,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:37:53,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161475671] [2020-12-22 08:37:53,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:37:53,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:37:53,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:37:53,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:37:53,181 INFO L87 Difference]: Start difference. First operand 412 states and 581 transitions. Second operand 5 states. [2020-12-22 08:37:53,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:37:53,325 INFO L93 Difference]: Finished difference Result 778 states and 1107 transitions. [2020-12-22 08:37:53,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:37:53,325 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-12-22 08:37:53,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:37:53,329 INFO L225 Difference]: With dead ends: 778 [2020-12-22 08:37:53,330 INFO L226 Difference]: Without dead ends: 660 [2020-12-22 08:37:53,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:37:53,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2020-12-22 08:37:53,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 503. [2020-12-22 08:37:53,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 503 states. [2020-12-22 08:37:53,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 714 transitions. [2020-12-22 08:37:53,403 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 714 transitions. Word has length 53 [2020-12-22 08:37:53,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:37:53,403 INFO L481 AbstractCegarLoop]: Abstraction has 503 states and 714 transitions. [2020-12-22 08:37:53,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:37:53,403 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 714 transitions. [2020-12-22 08:37:53,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 08:37:53,404 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:37:53,404 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] [2020-12-22 08:37:53,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:37:53,409 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:37:53,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:37:53,410 INFO L82 PathProgramCache]: Analyzing trace with hash -680909608, now seen corresponding path program 1 times [2020-12-22 08:37:53,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:37:53,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565953555] [2020-12-22 08:37:53,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:37:53,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:37:53,698 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 08:37:53,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565953555] [2020-12-22 08:37:53,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:37:53,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 08:37:53,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225903239] [2020-12-22 08:37:53,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 08:37:53,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:37:53,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 08:37:53,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 08:37:53,705 INFO L87 Difference]: Start difference. First operand 503 states and 714 transitions. Second operand 9 states. [2020-12-22 08:37:54,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:37:54,336 INFO L93 Difference]: Finished difference Result 1368 states and 1966 transitions. [2020-12-22 08:37:54,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 08:37:54,336 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 54 [2020-12-22 08:37:54,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:37:54,342 INFO L225 Difference]: With dead ends: 1368 [2020-12-22 08:37:54,342 INFO L226 Difference]: Without dead ends: 928 [2020-12-22 08:37:54,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-12-22 08:37:54,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2020-12-22 08:37:54,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 503. [2020-12-22 08:37:54,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 503 states. [2020-12-22 08:37:54,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 713 transitions. [2020-12-22 08:37:54,427 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 713 transitions. Word has length 54 [2020-12-22 08:37:54,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:37:54,427 INFO L481 AbstractCegarLoop]: Abstraction has 503 states and 713 transitions. [2020-12-22 08:37:54,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 08:37:54,427 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 713 transitions. [2020-12-22 08:37:54,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 08:37:54,428 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:37:54,428 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] [2020-12-22 08:37:54,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:37:54,428 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:37:54,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:37:54,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1757672516, now seen corresponding path program 1 times [2020-12-22 08:37:54,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:37:54,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203052619] [2020-12-22 08:37:54,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:37:54,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:37:54,684 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 08:37:54,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203052619] [2020-12-22 08:37:54,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:37:54,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:37:54,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462327952] [2020-12-22 08:37:54,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:37:54,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:37:54,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:37:54,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:37:54,692 INFO L87 Difference]: Start difference. First operand 503 states and 713 transitions. Second operand 10 states. [2020-12-22 08:37:55,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:37:55,625 INFO L93 Difference]: Finished difference Result 1398 states and 2001 transitions. [2020-12-22 08:37:55,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 08:37:55,626 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2020-12-22 08:37:55,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:37:55,632 INFO L225 Difference]: With dead ends: 1398 [2020-12-22 08:37:55,633 INFO L226 Difference]: Without dead ends: 963 [2020-12-22 08:37:55,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-12-22 08:37:55,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2020-12-22 08:37:55,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 503. [2020-12-22 08:37:55,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 503 states. [2020-12-22 08:37:55,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 711 transitions. [2020-12-22 08:37:55,733 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 711 transitions. Word has length 54 [2020-12-22 08:37:55,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:37:55,734 INFO L481 AbstractCegarLoop]: Abstraction has 503 states and 711 transitions. [2020-12-22 08:37:55,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:37:55,734 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 711 transitions. [2020-12-22 08:37:55,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 08:37:55,735 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:37:55,735 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] [2020-12-22 08:37:55,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:37:55,737 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:37:55,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:37:55,738 INFO L82 PathProgramCache]: Analyzing trace with hash -728953036, now seen corresponding path program 1 times [2020-12-22 08:37:55,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:37:55,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302050962] [2020-12-22 08:37:55,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:37:55,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:37:55,959 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 08:37:55,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302050962] [2020-12-22 08:37:55,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:37:55,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:37:55,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278754850] [2020-12-22 08:37:55,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:37:55,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:37:55,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:37:55,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:37:55,962 INFO L87 Difference]: Start difference. First operand 503 states and 711 transitions. Second operand 10 states. [2020-12-22 08:37:56,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:37:56,895 INFO L93 Difference]: Finished difference Result 1383 states and 1975 transitions. [2020-12-22 08:37:56,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 08:37:56,895 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-12-22 08:37:56,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:37:56,903 INFO L225 Difference]: With dead ends: 1383 [2020-12-22 08:37:56,904 INFO L226 Difference]: Without dead ends: 958 [2020-12-22 08:37:56,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-12-22 08:37:56,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2020-12-22 08:37:57,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 503. [2020-12-22 08:37:57,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 503 states. [2020-12-22 08:37:57,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 707 transitions. [2020-12-22 08:37:57,019 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 707 transitions. Word has length 55 [2020-12-22 08:37:57,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:37:57,020 INFO L481 AbstractCegarLoop]: Abstraction has 503 states and 707 transitions. [2020-12-22 08:37:57,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:37:57,020 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 707 transitions. [2020-12-22 08:37:57,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 08:37:57,021 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:37:57,021 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] [2020-12-22 08:37:57,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:37:57,022 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:37:57,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:37:57,023 INFO L82 PathProgramCache]: Analyzing trace with hash -2014195720, now seen corresponding path program 1 times [2020-12-22 08:37:57,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:37:57,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323737248] [2020-12-22 08:37:57,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:37:57,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:37:57,925 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 08:37:57,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323737248] [2020-12-22 08:37:57,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:37:57,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-12-22 08:37:57,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934832556] [2020-12-22 08:37:57,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 08:37:57,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:37:57,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 08:37:57,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2020-12-22 08:37:57,929 INFO L87 Difference]: Start difference. First operand 503 states and 707 transitions. Second operand 22 states. [2020-12-22 08:37:58,184 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2020-12-22 08:37:59,054 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-12-22 08:37:59,343 WARN L197 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2020-12-22 08:37:59,633 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 80 [2020-12-22 08:38:00,011 WARN L197 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 89 [2020-12-22 08:38:00,187 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-12-22 08:38:00,356 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-12-22 08:38:00,534 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-12-22 08:38:00,814 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-12-22 08:38:01,020 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2020-12-22 08:38:01,255 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 08:38:01,494 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-12-22 08:38:03,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:38:03,546 INFO L93 Difference]: Finished difference Result 2741 states and 3948 transitions. [2020-12-22 08:38:03,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 08:38:03,547 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 56 [2020-12-22 08:38:03,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:38:03,564 INFO L225 Difference]: With dead ends: 2741 [2020-12-22 08:38:03,564 INFO L226 Difference]: Without dead ends: 2614 [2020-12-22 08:38:03,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=403, Invalid=1577, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 08:38:03,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2614 states. [2020-12-22 08:38:03,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2614 to 503. [2020-12-22 08:38:03,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 503 states. [2020-12-22 08:38:03,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 706 transitions. [2020-12-22 08:38:03,735 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 706 transitions. Word has length 56 [2020-12-22 08:38:03,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:38:03,735 INFO L481 AbstractCegarLoop]: Abstraction has 503 states and 706 transitions. [2020-12-22 08:38:03,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 08:38:03,736 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 706 transitions. [2020-12-22 08:38:03,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 08:38:03,736 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:38:03,737 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] [2020-12-22 08:38:03,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:38:03,737 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:38:03,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:38:03,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1797287643, now seen corresponding path program 1 times [2020-12-22 08:38:03,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:38:03,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315518063] [2020-12-22 08:38:03,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:38:03,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:38:04,511 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 08:38:04,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315518063] [2020-12-22 08:38:04,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:38:04,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2020-12-22 08:38:04,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671247684] [2020-12-22 08:38:04,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 08:38:04,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:38:04,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 08:38:04,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2020-12-22 08:38:04,514 INFO L87 Difference]: Start difference. First operand 503 states and 706 transitions. Second operand 21 states. [2020-12-22 08:38:04,730 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2020-12-22 08:38:05,274 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-12-22 08:38:05,466 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-12-22 08:38:05,698 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-12-22 08:38:05,990 WARN L197 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 78 [2020-12-22 08:38:06,683 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2020-12-22 08:38:08,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:38:08,857 INFO L93 Difference]: Finished difference Result 2827 states and 4069 transitions. [2020-12-22 08:38:08,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 08:38:08,858 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 56 [2020-12-22 08:38:08,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:38:08,871 INFO L225 Difference]: With dead ends: 2827 [2020-12-22 08:38:08,871 INFO L226 Difference]: Without dead ends: 2614 [2020-12-22 08:38:08,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=286, Invalid=1120, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 08:38:08,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2614 states. [2020-12-22 08:38:09,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2614 to 508. [2020-12-22 08:38:09,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 508 states. [2020-12-22 08:38:09,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 711 transitions. [2020-12-22 08:38:09,013 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 711 transitions. Word has length 56 [2020-12-22 08:38:09,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:38:09,014 INFO L481 AbstractCegarLoop]: Abstraction has 508 states and 711 transitions. [2020-12-22 08:38:09,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 08:38:09,014 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 711 transitions. [2020-12-22 08:38:09,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 08:38:09,015 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:38:09,015 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] [2020-12-22 08:38:09,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:38:09,015 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:38:09,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:38:09,016 INFO L82 PathProgramCache]: Analyzing trace with hash 929811098, now seen corresponding path program 1 times [2020-12-22 08:38:09,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:38:09,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122537234] [2020-12-22 08:38:09,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:38:09,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:38:09,772 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 08:38:09,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122537234] [2020-12-22 08:38:09,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:38:09,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2020-12-22 08:38:09,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263259530] [2020-12-22 08:38:09,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 08:38:09,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:38:09,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 08:38:09,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2020-12-22 08:38:09,774 INFO L87 Difference]: Start difference. First operand 508 states and 711 transitions. Second operand 21 states. [2020-12-22 08:38:10,762 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-12-22 08:38:13,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:38:13,389 INFO L93 Difference]: Finished difference Result 3001 states and 4328 transitions. [2020-12-22 08:38:13,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 08:38:13,390 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 56 [2020-12-22 08:38:13,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:38:13,406 INFO L225 Difference]: With dead ends: 3001 [2020-12-22 08:38:13,406 INFO L226 Difference]: Without dead ends: 2788 [2020-12-22 08:38:13,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=333, Invalid=1389, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 08:38:13,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2788 states. [2020-12-22 08:38:13,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2788 to 518. [2020-12-22 08:38:13,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 518 states. [2020-12-22 08:38:13,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 723 transitions. [2020-12-22 08:38:13,617 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 723 transitions. Word has length 56 [2020-12-22 08:38:13,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:38:13,617 INFO L481 AbstractCegarLoop]: Abstraction has 518 states and 723 transitions. [2020-12-22 08:38:13,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 08:38:13,618 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 723 transitions. [2020-12-22 08:38:13,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 08:38:13,618 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:38:13,619 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] [2020-12-22 08:38:13,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:38:13,619 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:38:13,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:38:13,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1026982439, now seen corresponding path program 1 times [2020-12-22 08:38:13,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:38:13,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366069149] [2020-12-22 08:38:13,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:38:13,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:38:14,477 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 08:38:14,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366069149] [2020-12-22 08:38:14,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:38:14,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2020-12-22 08:38:14,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180874254] [2020-12-22 08:38:14,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 08:38:14,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:38:14,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 08:38:14,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2020-12-22 08:38:14,480 INFO L87 Difference]: Start difference. First operand 518 states and 723 transitions. Second operand 21 states. [2020-12-22 08:38:14,675 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2020-12-22 08:38:15,483 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2020-12-22 08:38:15,676 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2020-12-22 08:38:15,942 WARN L197 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2020-12-22 08:38:16,089 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2020-12-22 08:38:16,243 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2020-12-22 08:38:18,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:38:18,958 INFO L93 Difference]: Finished difference Result 3410 states and 4923 transitions. [2020-12-22 08:38:18,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 08:38:18,959 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 56 [2020-12-22 08:38:18,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:38:18,974 INFO L225 Difference]: With dead ends: 3410 [2020-12-22 08:38:18,975 INFO L226 Difference]: Without dead ends: 3203 [2020-12-22 08:38:18,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=306, Invalid=1416, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 08:38:18,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3203 states. [2020-12-22 08:38:19,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3203 to 523. [2020-12-22 08:38:19,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 523 states. [2020-12-22 08:38:19,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 729 transitions. [2020-12-22 08:38:19,124 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 729 transitions. Word has length 56 [2020-12-22 08:38:19,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:38:19,125 INFO L481 AbstractCegarLoop]: Abstraction has 523 states and 729 transitions. [2020-12-22 08:38:19,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 08:38:19,125 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 729 transitions. [2020-12-22 08:38:19,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 08:38:19,126 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:38:19,126 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] [2020-12-22 08:38:19,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:38:19,126 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:38:19,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:38:19,127 INFO L82 PathProgramCache]: Analyzing trace with hash 788720349, now seen corresponding path program 1 times [2020-12-22 08:38:19,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:38:19,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642717761] [2020-12-22 08:38:19,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:38:19,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:38:19,709 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 08:38:19,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642717761] [2020-12-22 08:38:19,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:38:19,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-12-22 08:38:19,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606510449] [2020-12-22 08:38:19,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 08:38:19,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:38:19,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 08:38:19,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-12-22 08:38:19,712 INFO L87 Difference]: Start difference. First operand 523 states and 729 transitions. Second operand 14 states. [2020-12-22 08:38:20,358 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-12-22 08:38:20,589 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-12-22 08:38:20,841 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-12-22 08:38:21,272 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2020-12-22 08:38:21,600 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2020-12-22 08:38:21,793 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2020-12-22 08:38:22,372 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2020-12-22 08:38:22,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:38:22,993 INFO L93 Difference]: Finished difference Result 2374 states and 3422 transitions. [2020-12-22 08:38:22,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 08:38:22,993 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 57 [2020-12-22 08:38:22,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:38:23,002 INFO L225 Difference]: With dead ends: 2374 [2020-12-22 08:38:23,002 INFO L226 Difference]: Without dead ends: 2146 [2020-12-22 08:38:23,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2020-12-22 08:38:23,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2146 states. [2020-12-22 08:38:23,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2146 to 501. [2020-12-22 08:38:23,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 501 states. [2020-12-22 08:38:23,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 700 transitions. [2020-12-22 08:38:23,174 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 700 transitions. Word has length 57 [2020-12-22 08:38:23,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:38:23,175 INFO L481 AbstractCegarLoop]: Abstraction has 501 states and 700 transitions. [2020-12-22 08:38:23,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 08:38:23,175 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 700 transitions. [2020-12-22 08:38:23,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 08:38:23,176 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:38:23,176 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] [2020-12-22 08:38:23,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 08:38:23,176 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:38:23,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:38:23,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1168073188, now seen corresponding path program 1 times [2020-12-22 08:38:23,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:38:23,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256264106] [2020-12-22 08:38:23,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:38:23,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:38:23,769 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 08:38:23,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256264106] [2020-12-22 08:38:23,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:38:23,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-12-22 08:38:23,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285334675] [2020-12-22 08:38:23,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 08:38:23,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:38:23,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 08:38:23,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-12-22 08:38:23,771 INFO L87 Difference]: Start difference. First operand 501 states and 700 transitions. Second operand 15 states. [2020-12-22 08:38:24,438 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2020-12-22 08:38:24,691 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2020-12-22 08:38:24,850 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-12-22 08:38:25,012 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-12-22 08:38:25,195 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2020-12-22 08:38:25,729 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-12-22 08:38:26,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:38:26,924 INFO L93 Difference]: Finished difference Result 2244 states and 3242 transitions. [2020-12-22 08:38:26,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 08:38:26,925 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2020-12-22 08:38:26,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:38:26,932 INFO L225 Difference]: With dead ends: 2244 [2020-12-22 08:38:26,933 INFO L226 Difference]: Without dead ends: 2037 [2020-12-22 08:38:26,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2020-12-22 08:38:26,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2037 states. [2020-12-22 08:38:27,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2037 to 497. [2020-12-22 08:38:27,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 497 states. [2020-12-22 08:38:27,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 695 transitions. [2020-12-22 08:38:27,155 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 695 transitions. Word has length 57 [2020-12-22 08:38:27,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:38:27,156 INFO L481 AbstractCegarLoop]: Abstraction has 497 states and 695 transitions. [2020-12-22 08:38:27,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 08:38:27,156 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 695 transitions. [2020-12-22 08:38:27,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 08:38:27,157 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:38:27,157 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] [2020-12-22 08:38:27,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 08:38:27,157 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:38:27,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:38:27,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1784114015, now seen corresponding path program 1 times [2020-12-22 08:38:27,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:38:27,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893648508] [2020-12-22 08:38:27,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:38:27,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:38:27,710 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 08:38:27,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893648508] [2020-12-22 08:38:27,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:38:27,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-12-22 08:38:27,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164532773] [2020-12-22 08:38:27,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 08:38:27,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:38:27,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 08:38:27,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-12-22 08:38:27,712 INFO L87 Difference]: Start difference. First operand 497 states and 695 transitions. Second operand 13 states. [2020-12-22 08:38:28,160 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2020-12-22 08:38:29,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:38:29,794 INFO L93 Difference]: Finished difference Result 1681 states and 2416 transitions. [2020-12-22 08:38:29,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 08:38:29,795 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 57 [2020-12-22 08:38:29,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:38:29,801 INFO L225 Difference]: With dead ends: 1681 [2020-12-22 08:38:29,801 INFO L226 Difference]: Without dead ends: 1468 [2020-12-22 08:38:29,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2020-12-22 08:38:29,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1468 states. [2020-12-22 08:38:29,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1468 to 486. [2020-12-22 08:38:29,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 486 states. [2020-12-22 08:38:29,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 680 transitions. [2020-12-22 08:38:29,976 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 680 transitions. Word has length 57 [2020-12-22 08:38:29,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:38:29,976 INFO L481 AbstractCegarLoop]: Abstraction has 486 states and 680 transitions. [2020-12-22 08:38:29,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 08:38:29,976 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 680 transitions. [2020-12-22 08:38:29,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 08:38:29,977 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:38:29,977 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] [2020-12-22 08:38:29,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 08:38:29,977 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:38:29,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:38:29,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1628002528, now seen corresponding path program 1 times [2020-12-22 08:38:29,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:38:29,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659584675] [2020-12-22 08:38:29,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:38:30,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:38:31,214 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 08:38:31,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659584675] [2020-12-22 08:38:31,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:38:31,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2020-12-22 08:38:31,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484021163] [2020-12-22 08:38:31,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 08:38:31,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:38:31,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 08:38:31,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2020-12-22 08:38:31,218 INFO L87 Difference]: Start difference. First operand 486 states and 680 transitions. Second operand 21 states. [2020-12-22 08:38:32,101 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-12-22 08:38:32,405 WARN L197 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2020-12-22 08:38:32,878 WARN L197 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2020-12-22 08:38:33,422 WARN L197 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2020-12-22 08:38:34,195 WARN L197 SmtUtils]: Spent 711.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 82 [2020-12-22 08:38:34,549 WARN L197 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2020-12-22 08:38:34,904 WARN L197 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2020-12-22 08:38:35,311 WARN L197 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2020-12-22 08:38:35,501 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-12-22 08:38:35,910 WARN L197 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 58 [2020-12-22 08:38:36,225 WARN L197 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2020-12-22 08:38:39,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:38:39,247 INFO L93 Difference]: Finished difference Result 2338 states and 3372 transitions. [2020-12-22 08:38:39,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 08:38:39,248 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 57 [2020-12-22 08:38:39,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:38:39,256 INFO L225 Difference]: With dead ends: 2338 [2020-12-22 08:38:39,256 INFO L226 Difference]: Without dead ends: 2126 [2020-12-22 08:38:39,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=304, Invalid=1178, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 08:38:39,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2020-12-22 08:38:39,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 486. [2020-12-22 08:38:39,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 486 states. [2020-12-22 08:38:39,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 679 transitions. [2020-12-22 08:38:39,428 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 679 transitions. Word has length 57 [2020-12-22 08:38:39,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:38:39,428 INFO L481 AbstractCegarLoop]: Abstraction has 486 states and 679 transitions. [2020-12-22 08:38:39,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 08:38:39,428 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 679 transitions. [2020-12-22 08:38:39,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 08:38:39,429 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:38:39,429 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] [2020-12-22 08:38:39,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 08:38:39,429 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:38:39,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:38:39,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1010808515, now seen corresponding path program 1 times [2020-12-22 08:38:39,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:38:39,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931094049] [2020-12-22 08:38:39,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:38:39,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:38:40,348 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 08:38:40,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931094049] [2020-12-22 08:38:40,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:38:40,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-12-22 08:38:40,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277908134] [2020-12-22 08:38:40,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 08:38:40,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:38:40,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 08:38:40,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2020-12-22 08:38:40,350 INFO L87 Difference]: Start difference. First operand 486 states and 679 transitions. Second operand 18 states. [2020-12-22 08:38:41,215 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-12-22 08:38:41,524 WARN L197 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2020-12-22 08:38:41,914 WARN L197 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2020-12-22 08:38:42,224 WARN L197 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-12-22 08:38:42,532 WARN L197 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-12-22 08:38:42,849 WARN L197 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2020-12-22 08:38:43,544 WARN L197 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-12-22 08:38:44,086 WARN L197 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-12-22 08:38:46,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:38:46,671 INFO L93 Difference]: Finished difference Result 4319 states and 6277 transitions. [2020-12-22 08:38:46,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 08:38:46,672 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 57 [2020-12-22 08:38:46,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:38:46,690 INFO L225 Difference]: With dead ends: 4319 [2020-12-22 08:38:46,690 INFO L226 Difference]: Without dead ends: 4112 [2020-12-22 08:38:46,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=303, Invalid=1103, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 08:38:46,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4112 states. [2020-12-22 08:38:46,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4112 to 491. [2020-12-22 08:38:46,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 491 states. [2020-12-22 08:38:46,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 685 transitions. [2020-12-22 08:38:46,941 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 685 transitions. Word has length 57 [2020-12-22 08:38:46,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:38:46,941 INFO L481 AbstractCegarLoop]: Abstraction has 491 states and 685 transitions. [2020-12-22 08:38:46,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 08:38:46,942 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 685 transitions. [2020-12-22 08:38:46,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 08:38:46,942 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:38:46,942 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] [2020-12-22 08:38:46,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 08:38:46,943 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:38:46,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:38:46,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1089654438, now seen corresponding path program 1 times [2020-12-22 08:38:46,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:38:46,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800475691] [2020-12-22 08:38:46,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:38:46,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:38:47,806 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 08:38:47,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800475691] [2020-12-22 08:38:47,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:38:47,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2020-12-22 08:38:47,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730438495] [2020-12-22 08:38:47,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 08:38:47,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:38:47,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 08:38:47,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2020-12-22 08:38:47,809 INFO L87 Difference]: Start difference. First operand 491 states and 685 transitions. Second operand 21 states. [2020-12-22 08:38:48,057 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2020-12-22 08:38:48,846 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-12-22 08:38:49,110 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-12-22 08:38:49,391 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 73 [2020-12-22 08:38:49,769 WARN L197 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 84 [2020-12-22 08:38:49,962 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-12-22 08:38:50,154 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-12-22 08:38:50,365 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-12-22 08:38:50,675 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2020-12-22 08:38:50,915 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-12-22 08:38:51,177 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2020-12-22 08:38:51,392 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2020-12-22 08:38:51,788 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2020-12-22 08:38:54,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:38:54,601 INFO L93 Difference]: Finished difference Result 3103 states and 4505 transitions. [2020-12-22 08:38:54,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 08:38:54,602 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 58 [2020-12-22 08:38:54,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:38:54,608 INFO L225 Difference]: With dead ends: 3103 [2020-12-22 08:38:54,608 INFO L226 Difference]: Without dead ends: 2896 [2020-12-22 08:38:54,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=355, Invalid=1537, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 08:38:54,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2896 states. [2020-12-22 08:38:54,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2896 to 475. [2020-12-22 08:38:54,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 475 states. [2020-12-22 08:38:54,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 665 transitions. [2020-12-22 08:38:54,798 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 665 transitions. Word has length 58 [2020-12-22 08:38:54,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:38:54,798 INFO L481 AbstractCegarLoop]: Abstraction has 475 states and 665 transitions. [2020-12-22 08:38:54,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 08:38:54,799 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 665 transitions. [2020-12-22 08:38:54,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 08:38:54,799 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:38:54,799 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] [2020-12-22 08:38:54,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 08:38:54,800 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:38:54,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:38:54,800 INFO L82 PathProgramCache]: Analyzing trace with hash -2021266470, now seen corresponding path program 1 times [2020-12-22 08:38:54,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:38:54,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224186360] [2020-12-22 08:38:54,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:38:54,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:38:55,585 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-12-22 08:38:55,969 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 08:38:55,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224186360] [2020-12-22 08:38:55,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:38:55,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2020-12-22 08:38:55,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100143696] [2020-12-22 08:38:55,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 08:38:55,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:38:55,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 08:38:55,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2020-12-22 08:38:55,971 INFO L87 Difference]: Start difference. First operand 475 states and 665 transitions. Second operand 21 states. [2020-12-22 08:38:56,520 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2020-12-22 08:38:56,732 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-12-22 08:38:56,905 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-12-22 08:38:57,131 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-12-22 08:38:57,352 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2020-12-22 08:38:57,711 WARN L197 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-12-22 08:38:57,935 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-12-22 08:38:58,166 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-12-22 08:38:58,374 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-12-22 08:38:58,685 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-12-22 08:38:58,906 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-12-22 08:38:59,179 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-12-22 08:38:59,431 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-12-22 08:39:01,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:39:01,638 INFO L93 Difference]: Finished difference Result 1900 states and 2743 transitions. [2020-12-22 08:39:01,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 08:39:01,639 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 58 [2020-12-22 08:39:01,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:39:01,643 INFO L225 Difference]: With dead ends: 1900 [2020-12-22 08:39:01,643 INFO L226 Difference]: Without dead ends: 1683 [2020-12-22 08:39:01,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=322, Invalid=1160, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 08:39:01,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1683 states. [2020-12-22 08:39:01,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1683 to 456. [2020-12-22 08:39:01,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-12-22 08:39:01,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 645 transitions. [2020-12-22 08:39:01,850 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 645 transitions. Word has length 58 [2020-12-22 08:39:01,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:39:01,851 INFO L481 AbstractCegarLoop]: Abstraction has 456 states and 645 transitions. [2020-12-22 08:39:01,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 08:39:01,851 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 645 transitions. [2020-12-22 08:39:01,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 08:39:01,852 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:39:01,852 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:39:01,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 08:39:01,852 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:39:01,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:39:01,853 INFO L82 PathProgramCache]: Analyzing trace with hash -773234718, now seen corresponding path program 1 times [2020-12-22 08:39:01,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:39:01,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135533511] [2020-12-22 08:39:01,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:39:01,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:39:01,896 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 08:39:01,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135533511] [2020-12-22 08:39:01,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:39:01,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:39:01,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54938206] [2020-12-22 08:39:01,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:39:01,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:39:01,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:39:01,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:39:01,899 INFO L87 Difference]: Start difference. First operand 456 states and 645 transitions. Second operand 3 states. [2020-12-22 08:39:02,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:39:02,512 INFO L93 Difference]: Finished difference Result 1190 states and 1709 transitions. [2020-12-22 08:39:02,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:39:02,513 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 08:39:02,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:39:02,515 INFO L225 Difference]: With dead ends: 1190 [2020-12-22 08:39:02,515 INFO L226 Difference]: Without dead ends: 792 [2020-12-22 08:39:02,516 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 08:39:02,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2020-12-22 08:39:03,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 790. [2020-12-22 08:39:03,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 790 states. [2020-12-22 08:39:03,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 1106 transitions. [2020-12-22 08:39:03,046 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 1106 transitions. Word has length 76 [2020-12-22 08:39:03,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:39:03,046 INFO L481 AbstractCegarLoop]: Abstraction has 790 states and 1106 transitions. [2020-12-22 08:39:03,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:39:03,046 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 1106 transitions. [2020-12-22 08:39:03,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 08:39:03,047 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:39:03,047 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:39:03,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 08:39:03,048 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:39:03,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:39:03,048 INFO L82 PathProgramCache]: Analyzing trace with hash -2013626748, now seen corresponding path program 1 times [2020-12-22 08:39:03,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:39:03,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799981176] [2020-12-22 08:39:03,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:39:03,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:39:03,100 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 08:39:03,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799981176] [2020-12-22 08:39:03,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:39:03,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:39:03,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050330247] [2020-12-22 08:39:03,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:39:03,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:39:03,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:39:03,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:39:03,102 INFO L87 Difference]: Start difference. First operand 790 states and 1106 transitions. Second operand 3 states. [2020-12-22 08:39:03,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:39:03,836 INFO L93 Difference]: Finished difference Result 1975 states and 2783 transitions. [2020-12-22 08:39:03,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:39:03,837 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 08:39:03,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:39:03,839 INFO L225 Difference]: With dead ends: 1975 [2020-12-22 08:39:03,839 INFO L226 Difference]: Without dead ends: 1243 [2020-12-22 08:39:03,840 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 08:39:03,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1243 states. [2020-12-22 08:39:04,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1243 to 1165. [2020-12-22 08:39:04,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1165 states. [2020-12-22 08:39:04,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 1623 transitions. [2020-12-22 08:39:04,354 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 1623 transitions. Word has length 77 [2020-12-22 08:39:04,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:39:04,354 INFO L481 AbstractCegarLoop]: Abstraction has 1165 states and 1623 transitions. [2020-12-22 08:39:04,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:39:04,354 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 1623 transitions. [2020-12-22 08:39:04,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 08:39:04,355 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:39:04,355 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] [2020-12-22 08:39:04,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 08:39:04,355 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:39:04,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:39:04,356 INFO L82 PathProgramCache]: Analyzing trace with hash 31132410, now seen corresponding path program 1 times [2020-12-22 08:39:04,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:39:04,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6851859] [2020-12-22 08:39:04,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:39:04,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:39:04,406 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 08:39:04,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6851859] [2020-12-22 08:39:04,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:39:04,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:39:04,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145946464] [2020-12-22 08:39:04,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:39:04,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:39:04,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:39:04,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:39:04,409 INFO L87 Difference]: Start difference. First operand 1165 states and 1623 transitions. Second operand 3 states. [2020-12-22 08:39:05,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:39:05,735 INFO L93 Difference]: Finished difference Result 3259 states and 4537 transitions. [2020-12-22 08:39:05,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:39:05,736 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-22 08:39:05,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:39:05,739 INFO L225 Difference]: With dead ends: 3259 [2020-12-22 08:39:05,739 INFO L226 Difference]: Without dead ends: 2152 [2020-12-22 08:39:05,745 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 08:39:05,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2020-12-22 08:39:06,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 2030. [2020-12-22 08:39:06,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2030 states. [2020-12-22 08:39:06,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2030 states to 2030 states and 2794 transitions. [2020-12-22 08:39:06,789 INFO L78 Accepts]: Start accepts. Automaton has 2030 states and 2794 transitions. Word has length 78 [2020-12-22 08:39:06,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:39:06,789 INFO L481 AbstractCegarLoop]: Abstraction has 2030 states and 2794 transitions. [2020-12-22 08:39:06,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:39:06,789 INFO L276 IsEmpty]: Start isEmpty. Operand 2030 states and 2794 transitions. [2020-12-22 08:39:06,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 08:39:06,790 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:39:06,790 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] [2020-12-22 08:39:06,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 08:39:06,790 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:39:06,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:39:06,790 INFO L82 PathProgramCache]: Analyzing trace with hash 769651115, now seen corresponding path program 1 times [2020-12-22 08:39:06,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:39:06,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192195593] [2020-12-22 08:39:06,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:39:06,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:39:06,844 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 08:39:06,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192195593] [2020-12-22 08:39:06,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:39:06,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:39:06,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251560601] [2020-12-22 08:39:06,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:39:06,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:39:06,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:39:06,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:39:06,846 INFO L87 Difference]: Start difference. First operand 2030 states and 2794 transitions. Second operand 3 states. [2020-12-22 08:39:08,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:39:08,706 INFO L93 Difference]: Finished difference Result 5734 states and 7840 transitions. [2020-12-22 08:39:08,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:39:08,707 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 08:39:08,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:39:08,712 INFO L225 Difference]: With dead ends: 5734 [2020-12-22 08:39:08,712 INFO L226 Difference]: Without dead ends: 3762 [2020-12-22 08:39:08,714 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 08:39:08,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3762 states. [2020-12-22 08:39:10,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3762 to 3520. [2020-12-22 08:39:10,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3520 states. [2020-12-22 08:39:10,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3520 states to 3520 states and 4746 transitions. [2020-12-22 08:39:10,391 INFO L78 Accepts]: Start accepts. Automaton has 3520 states and 4746 transitions. Word has length 79 [2020-12-22 08:39:10,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:39:10,391 INFO L481 AbstractCegarLoop]: Abstraction has 3520 states and 4746 transitions. [2020-12-22 08:39:10,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:39:10,392 INFO L276 IsEmpty]: Start isEmpty. Operand 3520 states and 4746 transitions. [2020-12-22 08:39:10,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 08:39:10,392 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:39:10,392 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] [2020-12-22 08:39:10,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 08:39:10,392 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:39:10,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:39:10,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1757386099, now seen corresponding path program 1 times [2020-12-22 08:39:10,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:39:10,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249428846] [2020-12-22 08:39:10,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:39:10,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:39:10,485 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 08:39:10,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249428846] [2020-12-22 08:39:10,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:39:10,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:39:10,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528379677] [2020-12-22 08:39:10,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:39:10,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:39:10,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:39:10,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:39:10,488 INFO L87 Difference]: Start difference. First operand 3520 states and 4746 transitions. Second operand 6 states. [2020-12-22 08:39:13,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:39:13,479 INFO L93 Difference]: Finished difference Result 5433 states and 7274 transitions. [2020-12-22 08:39:13,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 08:39:13,480 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 80 [2020-12-22 08:39:13,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:39:13,490 INFO L225 Difference]: With dead ends: 5433 [2020-12-22 08:39:13,491 INFO L226 Difference]: Without dead ends: 5431 [2020-12-22 08:39:13,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-22 08:39:13,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5431 states. [2020-12-22 08:39:15,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5431 to 3616. [2020-12-22 08:39:15,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3616 states. [2020-12-22 08:39:15,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3616 states to 3616 states and 4802 transitions. [2020-12-22 08:39:15,414 INFO L78 Accepts]: Start accepts. Automaton has 3616 states and 4802 transitions. Word has length 80 [2020-12-22 08:39:15,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:39:15,414 INFO L481 AbstractCegarLoop]: Abstraction has 3616 states and 4802 transitions. [2020-12-22 08:39:15,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:39:15,414 INFO L276 IsEmpty]: Start isEmpty. Operand 3616 states and 4802 transitions. [2020-12-22 08:39:15,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 08:39:15,415 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:39:15,415 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] [2020-12-22 08:39:15,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 08:39:15,415 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:39:15,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:39:15,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1852306095, now seen corresponding path program 1 times [2020-12-22 08:39:15,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:39:15,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40128966] [2020-12-22 08:39:15,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:39:15,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:39:15,459 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 08:39:15,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40128966] [2020-12-22 08:39:15,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:39:15,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:39:15,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260572965] [2020-12-22 08:39:15,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:39:15,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:39:15,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:39:15,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:39:15,461 INFO L87 Difference]: Start difference. First operand 3616 states and 4802 transitions. Second operand 3 states. [2020-12-22 08:39:17,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:39:17,307 INFO L93 Difference]: Finished difference Result 7276 states and 9684 transitions. [2020-12-22 08:39:17,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:39:17,308 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 08:39:17,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:39:17,316 INFO L225 Difference]: With dead ends: 7276 [2020-12-22 08:39:17,316 INFO L226 Difference]: Without dead ends: 3718 [2020-12-22 08:39:17,321 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 08:39:17,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3718 states. [2020-12-22 08:39:19,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3718 to 3716. [2020-12-22 08:39:19,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3716 states. [2020-12-22 08:39:19,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3716 states to 3716 states and 4866 transitions. [2020-12-22 08:39:19,305 INFO L78 Accepts]: Start accepts. Automaton has 3716 states and 4866 transitions. Word has length 80 [2020-12-22 08:39:19,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:39:19,305 INFO L481 AbstractCegarLoop]: Abstraction has 3716 states and 4866 transitions. [2020-12-22 08:39:19,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:39:19,305 INFO L276 IsEmpty]: Start isEmpty. Operand 3716 states and 4866 transitions. [2020-12-22 08:39:19,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-22 08:39:19,307 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:39:19,307 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 08:39:19,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 08:39:19,308 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:39:19,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:39:19,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1815794868, now seen corresponding path program 1 times [2020-12-22 08:39:19,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:39:19,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575464962] [2020-12-22 08:39:19,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:39:19,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:39:19,701 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:39:19,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575464962] [2020-12-22 08:39:19,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125992613] [2020-12-22 08:39:19,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 08:39:19,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:39:19,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 08:39:19,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 08:39:20,099 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 08:39:20,292 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 08:39:20,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 08:39:20,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 15 [2020-12-22 08:39:20,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193424085] [2020-12-22 08:39:20,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 08:39:20,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:39:20,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 08:39:20,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-12-22 08:39:20,294 INFO L87 Difference]: Start difference. First operand 3716 states and 4866 transitions. Second operand 15 states. [2020-12-22 08:39:22,218 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2020-12-22 08:39:23,086 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2020-12-22 08:39:23,235 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2020-12-22 08:39:26,893 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2020-12-22 08:39:32,777 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2020-12-22 08:39:34,273 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2020-12-22 08:39:41,077 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2020-12-22 08:39:45,138 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2020-12-22 08:39:46,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:39:46,546 INFO L93 Difference]: Finished difference Result 30158 states and 39474 transitions. [2020-12-22 08:39:46,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2020-12-22 08:39:46,547 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 101 [2020-12-22 08:39:46,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:39:46,611 INFO L225 Difference]: With dead ends: 30158 [2020-12-22 08:39:46,611 INFO L226 Difference]: Without dead ends: 26500 [2020-12-22 08:39:46,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4454 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=1863, Invalid=9693, Unknown=0, NotChecked=0, Total=11556 [2020-12-22 08:39:46,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26500 states. [2020-12-22 08:39:54,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26500 to 12996. [2020-12-22 08:39:54,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12996 states. [2020-12-22 08:39:54,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12996 states to 12996 states and 17123 transitions. [2020-12-22 08:39:54,256 INFO L78 Accepts]: Start accepts. Automaton has 12996 states and 17123 transitions. Word has length 101 [2020-12-22 08:39:54,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:39:54,257 INFO L481 AbstractCegarLoop]: Abstraction has 12996 states and 17123 transitions. [2020-12-22 08:39:54,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 08:39:54,257 INFO L276 IsEmpty]: Start isEmpty. Operand 12996 states and 17123 transitions. [2020-12-22 08:39:54,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-22 08:39:54,259 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:39:54,259 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 08:39:54,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 08:39:54,465 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:39:54,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:39:54,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1244020718, now seen corresponding path program 1 times [2020-12-22 08:39:54,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:39:54,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880726401] [2020-12-22 08:39:54,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:39:54,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:39:54,949 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 18 [2020-12-22 08:39:55,080 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:39:55,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880726401] [2020-12-22 08:39:55,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687019327] [2020-12-22 08:39:55,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 08:39:55,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:39:55,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 08:39:55,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 08:39:55,903 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 08:39:56,325 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 08:39:56,803 WARN L197 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 47 [2020-12-22 08:39:56,837 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 08:39:57,100 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2020-12-22 08:39:57,119 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 08:39:57,519 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-22 08:39:57,603 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 08:39:57,681 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 08:40:11,298 WARN L197 SmtUtils]: Spent 5.68 s on a formula simplification. DAG size of input: 574 DAG size of output: 44 [2020-12-22 08:40:12,071 WARN L197 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-12-22 08:40:12,670 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-12-22 08:40:12,824 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:40:12,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 08:40:12,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 27 [2020-12-22 08:40:12,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034273738] [2020-12-22 08:40:12,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 08:40:12,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:40:12,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 08:40:12,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=640, Unknown=0, NotChecked=0, Total=702 [2020-12-22 08:40:12,826 INFO L87 Difference]: Start difference. First operand 12996 states and 17123 transitions. Second operand 27 states. [2020-12-22 08:40:14,012 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2020-12-22 08:40:14,226 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2020-12-22 08:40:14,641 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 08:40:14,872 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-12-22 08:40:15,375 WARN L197 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 83 [2020-12-22 08:40:16,043 WARN L197 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 98 [2020-12-22 08:40:16,306 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2020-12-22 08:40:16,742 WARN L197 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 79 [2020-12-22 08:40:16,966 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-12-22 08:40:17,432 WARN L197 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 61 [2020-12-22 08:40:17,693 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2020-12-22 08:40:18,296 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 57 [2020-12-22 08:40:18,665 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2020-12-22 08:40:19,258 WARN L197 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 69 [2020-12-22 08:40:22,446 WARN L197 SmtUtils]: Spent 2.56 s on a formula simplification. DAG size of input: 122 DAG size of output: 92 [2020-12-22 08:40:25,670 WARN L197 SmtUtils]: Spent 2.33 s on a formula simplification. DAG size of input: 136 DAG size of output: 98 [2020-12-22 08:40:28,733 WARN L197 SmtUtils]: Spent 2.63 s on a formula simplification. DAG size of input: 125 DAG size of output: 95 [2020-12-22 08:40:29,072 WARN L197 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2020-12-22 08:40:29,495 WARN L197 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2020-12-22 08:40:29,975 WARN L197 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2020-12-22 08:40:30,444 WARN L197 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 63 [2020-12-22 08:40:30,888 WARN L197 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 60 [2020-12-22 08:40:34,331 WARN L197 SmtUtils]: Spent 2.95 s on a formula simplification. DAG size of input: 139 DAG size of output: 101 [2020-12-22 08:40:34,800 WARN L197 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-12-22 08:40:35,187 WARN L197 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2020-12-22 08:40:35,808 WARN L197 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 66 [2020-12-22 08:40:43,976 WARN L197 SmtUtils]: Spent 4.39 s on a formula simplification. DAG size of input: 139 DAG size of output: 101 [2020-12-22 08:40:44,419 WARN L197 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2020-12-22 08:40:45,042 WARN L197 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 66 [2020-12-22 08:40:49,375 WARN L197 SmtUtils]: Spent 2.99 s on a formula simplification. DAG size of input: 122 DAG size of output: 92 [2020-12-22 08:40:55,037 WARN L197 SmtUtils]: Spent 3.94 s on a formula simplification. DAG size of input: 127 DAG size of output: 89 [2020-12-22 08:40:58,915 WARN L197 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 110 DAG size of output: 80 [2020-12-22 08:41:02,707 WARN L197 SmtUtils]: Spent 2.77 s on a formula simplification. DAG size of input: 107 DAG size of output: 85 [2020-12-22 08:41:04,916 WARN L197 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2020-12-22 08:41:05,513 WARN L197 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-12-22 08:41:06,410 WARN L197 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 78 [2020-12-22 08:41:45,718 WARN L197 SmtUtils]: Spent 33.46 s on a formula simplification. DAG size of input: 158 DAG size of output: 119 [2020-12-22 08:41:50,164 WARN L197 SmtUtils]: Spent 3.06 s on a formula simplification. DAG size of input: 90 DAG size of output: 76 [2020-12-22 08:41:50,989 WARN L197 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37