/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_floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:03:56,105 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:03:56,107 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:03:56,145 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:03:56,146 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:03:56,147 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:03:56,149 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:03:56,152 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:03:56,154 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:03:56,155 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:03:56,157 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:03:56,158 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:03:56,159 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:03:56,160 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:03:56,162 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:03:56,163 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:03:56,165 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:03:56,166 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:03:56,168 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:03:56,171 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:03:56,173 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:03:56,175 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:03:56,177 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:03:56,178 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:03:56,181 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:03:56,207 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:03:56,208 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:03:56,209 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:03:56,210 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:03:56,237 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:03:56,237 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:03:56,239 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:03:56,239 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:03:56,240 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:03:56,240 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:03:56,240 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:03:56,240 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:03:56,240 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:03:56,241 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:03:56,241 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:03:56,241 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:03:56,241 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:03:56,241 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:03:56,242 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:03:56,242 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:03:56,242 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:03:56,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:03:56,242 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:03:56,243 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:03:56,243 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:03:56,243 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:03:56,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:03:56,243 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:03:56,244 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:03:56,244 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:03:56,668 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:03:56,709 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:03:56,713 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:03:56,714 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:03:56,715 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:03:56,716 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-12-22 08:03:56,802 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad425e4d0/626e0ab349c548259828876a9fb27aea/FLAG2919fbda6 [2020-12-22 08:03:57,478 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:03:57,479 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-12-22 08:03:57,503 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad425e4d0/626e0ab349c548259828876a9fb27aea/FLAG2919fbda6 [2020-12-22 08:03:57,813 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad425e4d0/626e0ab349c548259828876a9fb27aea [2020-12-22 08:03:57,817 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:03:57,819 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:03:57,826 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:03:57,827 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:03:57,830 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:03:57,831 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:03:57" (1/1) ... [2020-12-22 08:03:57,834 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a7d3eae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:03:57, skipping insertion in model container [2020-12-22 08:03:57,834 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:03:57" (1/1) ... [2020-12-22 08:03:57,844 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:03:57,905 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:03:58,124 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_floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[6831,6844] [2020-12-22 08:03:58,178 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:03:58,209 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:03:58,313 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_floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[6831,6844] [2020-12-22 08:03:58,347 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:03:58,375 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:03:58,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:03:58 WrapperNode [2020-12-22 08:03:58,376 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:03:58,378 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:03:58,378 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:03:58,378 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:03:58,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:03:58" (1/1) ... [2020-12-22 08:03:58,405 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:03:58" (1/1) ... [2020-12-22 08:03:58,453 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:03:58,454 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:03:58,455 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:03:58,455 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:03:58,467 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:03:58" (1/1) ... [2020-12-22 08:03:58,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:03:58" (1/1) ... [2020-12-22 08:03:58,472 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:03:58" (1/1) ... [2020-12-22 08:03:58,473 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:03:58" (1/1) ... [2020-12-22 08:03:58,485 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:03:58" (1/1) ... [2020-12-22 08:03:58,494 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:03:58" (1/1) ... [2020-12-22 08:03:58,500 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:03:58" (1/1) ... [2020-12-22 08:03:58,512 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:03:58,513 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:03:58,513 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:03:58,514 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:03:58,515 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:03:58" (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 08:03:58,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:03:58,643 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:03:58,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:03:58,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:03:59,659 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:03:59,659 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:03:59,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:03:59 BoogieIcfgContainer [2020-12-22 08:03:59,662 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:03:59,664 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:03:59,665 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:03:59,669 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:03:59,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:03:57" (1/3) ... [2020-12-22 08:03:59,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e3549aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:03:59, skipping insertion in model container [2020-12-22 08:03:59,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:03:58" (2/3) ... [2020-12-22 08:03:59,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e3549aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:03:59, skipping insertion in model container [2020-12-22 08:03:59,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:03:59" (3/3) ... [2020-12-22 08:03:59,673 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-12-22 08:03:59,681 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:03:59,687 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:03:59,711 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:03:59,769 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:03:59,769 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:03:59,769 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:03:59,770 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:03:59,770 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:03:59,770 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:03:59,773 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:03:59,773 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:03:59,814 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states. [2020-12-22 08:03:59,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 08:03:59,825 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:03:59,825 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 08:03:59,826 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:03:59,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:03:59,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1933157835, now seen corresponding path program 1 times [2020-12-22 08:03:59,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:03:59,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673885246] [2020-12-22 08:03:59,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:00,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:00,380 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 08:04:00,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673885246] [2020-12-22 08:04:00,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:00,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:04:00,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505982223] [2020-12-22 08:04:00,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:04:00,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:00,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:04:00,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:04:00,420 INFO L87 Difference]: Start difference. First operand 135 states. Second operand 3 states. [2020-12-22 08:04:00,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:00,588 INFO L93 Difference]: Finished difference Result 288 states and 491 transitions. [2020-12-22 08:04:00,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:04:00,590 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 57 [2020-12-22 08:04:00,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:00,605 INFO L225 Difference]: With dead ends: 288 [2020-12-22 08:04:00,606 INFO L226 Difference]: Without dead ends: 201 [2020-12-22 08:04:00,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 08:04:00,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-12-22 08:04:00,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 199. [2020-12-22 08:04:00,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-12-22 08:04:00,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 313 transitions. [2020-12-22 08:04:00,680 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 313 transitions. Word has length 57 [2020-12-22 08:04:00,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:00,680 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 313 transitions. [2020-12-22 08:04:00,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:04:00,681 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 313 transitions. [2020-12-22 08:04:00,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 08:04:00,684 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:00,684 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] [2020-12-22 08:04:00,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:04:00,685 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:00,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:00,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1883490782, now seen corresponding path program 1 times [2020-12-22 08:04:00,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:00,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627080384] [2020-12-22 08:04:00,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:00,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:00,857 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 08:04:00,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627080384] [2020-12-22 08:04:00,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:00,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:04:00,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537638347] [2020-12-22 08:04:00,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:04:00,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:00,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:04:00,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:04:00,864 INFO L87 Difference]: Start difference. First operand 199 states and 313 transitions. Second operand 3 states. [2020-12-22 08:04:00,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:00,966 INFO L93 Difference]: Finished difference Result 475 states and 769 transitions. [2020-12-22 08:04:00,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:04:00,967 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 59 [2020-12-22 08:04:00,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:00,970 INFO L225 Difference]: With dead ends: 475 [2020-12-22 08:04:00,970 INFO L226 Difference]: Without dead ends: 330 [2020-12-22 08:04:00,972 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 08:04:00,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-12-22 08:04:01,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 328. [2020-12-22 08:04:01,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-12-22 08:04:01,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 525 transitions. [2020-12-22 08:04:01,035 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 525 transitions. Word has length 59 [2020-12-22 08:04:01,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:01,039 INFO L481 AbstractCegarLoop]: Abstraction has 328 states and 525 transitions. [2020-12-22 08:04:01,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:04:01,039 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 525 transitions. [2020-12-22 08:04:01,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 08:04:01,046 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:01,046 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] [2020-12-22 08:04:01,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:04:01,046 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:01,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:01,051 INFO L82 PathProgramCache]: Analyzing trace with hash -111872728, now seen corresponding path program 1 times [2020-12-22 08:04:01,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:01,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471234595] [2020-12-22 08:04:01,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:01,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:01,212 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 08:04:01,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471234595] [2020-12-22 08:04:01,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:01,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:04:01,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668056392] [2020-12-22 08:04:01,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:04:01,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:01,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:04:01,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:04:01,221 INFO L87 Difference]: Start difference. First operand 328 states and 525 transitions. Second operand 3 states. [2020-12-22 08:04:01,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:01,274 INFO L93 Difference]: Finished difference Result 603 states and 981 transitions. [2020-12-22 08:04:01,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:04:01,275 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-12-22 08:04:01,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:01,278 INFO L225 Difference]: With dead ends: 603 [2020-12-22 08:04:01,279 INFO L226 Difference]: Without dead ends: 458 [2020-12-22 08:04:01,280 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 08:04:01,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-12-22 08:04:01,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 456. [2020-12-22 08:04:01,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-12-22 08:04:01,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 735 transitions. [2020-12-22 08:04:01,321 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 735 transitions. Word has length 61 [2020-12-22 08:04:01,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:01,322 INFO L481 AbstractCegarLoop]: Abstraction has 456 states and 735 transitions. [2020-12-22 08:04:01,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:04:01,322 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 735 transitions. [2020-12-22 08:04:01,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 08:04:01,325 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:01,325 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] [2020-12-22 08:04:01,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:04:01,325 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:01,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:01,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1275396395, now seen corresponding path program 1 times [2020-12-22 08:04:01,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:01,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523155701] [2020-12-22 08:04:01,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:01,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:01,451 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 08:04:01,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523155701] [2020-12-22 08:04:01,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:01,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:04:01,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408429817] [2020-12-22 08:04:01,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:04:01,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:01,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:04:01,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:04:01,459 INFO L87 Difference]: Start difference. First operand 456 states and 735 transitions. Second operand 3 states. [2020-12-22 08:04:01,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:01,537 INFO L93 Difference]: Finished difference Result 1172 states and 1911 transitions. [2020-12-22 08:04:01,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:04:01,538 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-12-22 08:04:01,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:01,546 INFO L225 Difference]: With dead ends: 1172 [2020-12-22 08:04:01,546 INFO L226 Difference]: Without dead ends: 793 [2020-12-22 08:04:01,552 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 08:04:01,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2020-12-22 08:04:01,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 791. [2020-12-22 08:04:01,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 791 states. [2020-12-22 08:04:01,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1277 transitions. [2020-12-22 08:04:01,600 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1277 transitions. Word has length 61 [2020-12-22 08:04:01,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:01,603 INFO L481 AbstractCegarLoop]: Abstraction has 791 states and 1277 transitions. [2020-12-22 08:04:01,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:04:01,603 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1277 transitions. [2020-12-22 08:04:01,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:04:01,612 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:01,613 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:04:01,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:04:01,613 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:01,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:01,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1280827262, now seen corresponding path program 1 times [2020-12-22 08:04:01,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:01,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210921616] [2020-12-22 08:04:01,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:01,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:01,788 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 08:04:01,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210921616] [2020-12-22 08:04:01,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:01,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:04:01,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143123062] [2020-12-22 08:04:01,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:04:01,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:01,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:04:01,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:04:01,791 INFO L87 Difference]: Start difference. First operand 791 states and 1277 transitions. Second operand 5 states. [2020-12-22 08:04:02,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:02,044 INFO L93 Difference]: Finished difference Result 2945 states and 4837 transitions. [2020-12-22 08:04:02,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:04:02,046 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-22 08:04:02,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:02,060 INFO L225 Difference]: With dead ends: 2945 [2020-12-22 08:04:02,061 INFO L226 Difference]: Without dead ends: 2231 [2020-12-22 08:04:02,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 08:04:02,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2020-12-22 08:04:02,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 1452. [2020-12-22 08:04:02,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1452 states. [2020-12-22 08:04:02,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1452 states to 1452 states and 2348 transitions. [2020-12-22 08:04:02,178 INFO L78 Accepts]: Start accepts. Automaton has 1452 states and 2348 transitions. Word has length 63 [2020-12-22 08:04:02,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:02,181 INFO L481 AbstractCegarLoop]: Abstraction has 1452 states and 2348 transitions. [2020-12-22 08:04:02,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:04:02,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1452 states and 2348 transitions. [2020-12-22 08:04:02,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:04:02,183 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:02,183 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] [2020-12-22 08:04:02,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:04:02,183 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:02,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:02,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1113443658, now seen corresponding path program 1 times [2020-12-22 08:04:02,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:02,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5772048] [2020-12-22 08:04:02,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:02,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:02,294 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 08:04:02,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5772048] [2020-12-22 08:04:02,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:02,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:04:02,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042205706] [2020-12-22 08:04:02,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:04:02,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:02,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:04:02,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:04:02,297 INFO L87 Difference]: Start difference. First operand 1452 states and 2348 transitions. Second operand 4 states. [2020-12-22 08:04:02,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:02,495 INFO L93 Difference]: Finished difference Result 3856 states and 6322 transitions. [2020-12-22 08:04:02,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:04:02,495 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-12-22 08:04:02,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:02,508 INFO L225 Difference]: With dead ends: 3856 [2020-12-22 08:04:02,508 INFO L226 Difference]: Without dead ends: 2483 [2020-12-22 08:04:02,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:04:02,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2483 states. [2020-12-22 08:04:02,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2483 to 2147. [2020-12-22 08:04:02,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2147 states. [2020-12-22 08:04:02,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2147 states to 2147 states and 3491 transitions. [2020-12-22 08:04:02,696 INFO L78 Accepts]: Start accepts. Automaton has 2147 states and 3491 transitions. Word has length 64 [2020-12-22 08:04:02,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:02,697 INFO L481 AbstractCegarLoop]: Abstraction has 2147 states and 3491 transitions. [2020-12-22 08:04:02,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:04:02,697 INFO L276 IsEmpty]: Start isEmpty. Operand 2147 states and 3491 transitions. [2020-12-22 08:04:02,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:04:02,699 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:02,699 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] [2020-12-22 08:04:02,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:04:02,701 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:02,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:02,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1248232611, now seen corresponding path program 1 times [2020-12-22 08:04:02,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:02,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047073622] [2020-12-22 08:04:02,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:02,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:02,799 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 08:04:02,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047073622] [2020-12-22 08:04:02,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:02,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:04:02,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35894099] [2020-12-22 08:04:02,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:04:02,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:02,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:04:02,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:04:02,802 INFO L87 Difference]: Start difference. First operand 2147 states and 3491 transitions. Second operand 3 states. [2020-12-22 08:04:02,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:02,970 INFO L93 Difference]: Finished difference Result 4165 states and 6807 transitions. [2020-12-22 08:04:02,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:04:02,971 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 08:04:02,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:02,987 INFO L225 Difference]: With dead ends: 4165 [2020-12-22 08:04:02,988 INFO L226 Difference]: Without dead ends: 3011 [2020-12-22 08:04:02,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:04:02,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3011 states. [2020-12-22 08:04:03,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3011 to 3009. [2020-12-22 08:04:03,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3009 states. [2020-12-22 08:04:03,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3009 states to 3009 states and 4878 transitions. [2020-12-22 08:04:03,209 INFO L78 Accepts]: Start accepts. Automaton has 3009 states and 4878 transitions. Word has length 64 [2020-12-22 08:04:03,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:03,209 INFO L481 AbstractCegarLoop]: Abstraction has 3009 states and 4878 transitions. [2020-12-22 08:04:03,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:04:03,210 INFO L276 IsEmpty]: Start isEmpty. Operand 3009 states and 4878 transitions. [2020-12-22 08:04:03,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:04:03,211 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:03,211 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] [2020-12-22 08:04:03,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:04:03,212 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:03,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:03,212 INFO L82 PathProgramCache]: Analyzing trace with hash -358605347, now seen corresponding path program 1 times [2020-12-22 08:04:03,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:03,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21240786] [2020-12-22 08:04:03,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:03,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:03,271 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 08:04:03,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21240786] [2020-12-22 08:04:03,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:03,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:04:03,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657485599] [2020-12-22 08:04:03,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:04:03,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:03,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:04:03,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:04:03,273 INFO L87 Difference]: Start difference. First operand 3009 states and 4878 transitions. Second operand 3 states. [2020-12-22 08:04:03,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:03,531 INFO L93 Difference]: Finished difference Result 6431 states and 10590 transitions. [2020-12-22 08:04:03,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:04:03,531 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 08:04:03,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:03,557 INFO L225 Difference]: With dead ends: 6431 [2020-12-22 08:04:03,557 INFO L226 Difference]: Without dead ends: 4345 [2020-12-22 08:04:03,562 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 08:04:03,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4345 states. [2020-12-22 08:04:03,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4345 to 4343. [2020-12-22 08:04:03,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4343 states. [2020-12-22 08:04:03,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4343 states to 4343 states and 7079 transitions. [2020-12-22 08:04:03,866 INFO L78 Accepts]: Start accepts. Automaton has 4343 states and 7079 transitions. Word has length 64 [2020-12-22 08:04:03,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:03,867 INFO L481 AbstractCegarLoop]: Abstraction has 4343 states and 7079 transitions. [2020-12-22 08:04:03,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:04:03,867 INFO L276 IsEmpty]: Start isEmpty. Operand 4343 states and 7079 transitions. [2020-12-22 08:04:03,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 08:04:03,876 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:03,876 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] [2020-12-22 08:04:03,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:04:03,876 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:03,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:03,878 INFO L82 PathProgramCache]: Analyzing trace with hash -214961207, now seen corresponding path program 1 times [2020-12-22 08:04:03,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:03,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852886950] [2020-12-22 08:04:03,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:03,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:03,968 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 08:04:03,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852886950] [2020-12-22 08:04:03,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:03,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:04:03,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534881351] [2020-12-22 08:04:03,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:04:03,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:03,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:04:03,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:04:03,978 INFO L87 Difference]: Start difference. First operand 4343 states and 7079 transitions. Second operand 4 states. [2020-12-22 08:04:04,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:04,492 INFO L93 Difference]: Finished difference Result 12351 states and 20249 transitions. [2020-12-22 08:04:04,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:04:04,493 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-12-22 08:04:04,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:04,536 INFO L225 Difference]: With dead ends: 12351 [2020-12-22 08:04:04,536 INFO L226 Difference]: Without dead ends: 8090 [2020-12-22 08:04:04,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:04:04,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8090 states. [2020-12-22 08:04:05,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8090 to 6911. [2020-12-22 08:04:05,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6911 states. [2020-12-22 08:04:05,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6911 states to 6911 states and 11221 transitions. [2020-12-22 08:04:05,058 INFO L78 Accepts]: Start accepts. Automaton has 6911 states and 11221 transitions. Word has length 65 [2020-12-22 08:04:05,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:05,059 INFO L481 AbstractCegarLoop]: Abstraction has 6911 states and 11221 transitions. [2020-12-22 08:04:05,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:04:05,059 INFO L276 IsEmpty]: Start isEmpty. Operand 6911 states and 11221 transitions. [2020-12-22 08:04:05,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 08:04:05,060 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:05,060 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] [2020-12-22 08:04:05,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:04:05,060 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:05,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:05,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1872749021, now seen corresponding path program 1 times [2020-12-22 08:04:05,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:05,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446797154] [2020-12-22 08:04:05,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:05,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:05,185 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 08:04:05,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446797154] [2020-12-22 08:04:05,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:05,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:04:05,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64836998] [2020-12-22 08:04:05,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:04:05,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:05,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:04:05,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:04:05,187 INFO L87 Difference]: Start difference. First operand 6911 states and 11221 transitions. Second operand 4 states. [2020-12-22 08:04:05,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:05,915 INFO L93 Difference]: Finished difference Result 19177 states and 31299 transitions. [2020-12-22 08:04:05,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:04:05,918 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-12-22 08:04:05,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:05,987 INFO L225 Difference]: With dead ends: 19177 [2020-12-22 08:04:05,987 INFO L226 Difference]: Without dead ends: 12348 [2020-12-22 08:04:06,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:04:06,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12348 states. [2020-12-22 08:04:06,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12348 to 10779. [2020-12-22 08:04:06,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10779 states. [2020-12-22 08:04:06,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10779 states to 10779 states and 17427 transitions. [2020-12-22 08:04:06,720 INFO L78 Accepts]: Start accepts. Automaton has 10779 states and 17427 transitions. Word has length 66 [2020-12-22 08:04:06,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:06,721 INFO L481 AbstractCegarLoop]: Abstraction has 10779 states and 17427 transitions. [2020-12-22 08:04:06,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:04:06,721 INFO L276 IsEmpty]: Start isEmpty. Operand 10779 states and 17427 transitions. [2020-12-22 08:04:06,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 08:04:06,722 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:06,722 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] [2020-12-22 08:04:06,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:04:06,722 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:06,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:06,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1396799506, now seen corresponding path program 1 times [2020-12-22 08:04:06,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:06,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215343413] [2020-12-22 08:04:06,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:06,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:06,884 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 08:04:06,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215343413] [2020-12-22 08:04:06,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:06,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:04:06,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56970503] [2020-12-22 08:04:06,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:04:06,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:06,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:04:06,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:04:06,888 INFO L87 Difference]: Start difference. First operand 10779 states and 17427 transitions. Second operand 5 states. [2020-12-22 08:04:07,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:07,974 INFO L93 Difference]: Finished difference Result 25359 states and 41228 transitions. [2020-12-22 08:04:07,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:04:07,975 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-12-22 08:04:07,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:08,015 INFO L225 Difference]: With dead ends: 25359 [2020-12-22 08:04:08,015 INFO L226 Difference]: Without dead ends: 14662 [2020-12-22 08:04:08,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 08:04:08,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14662 states. [2020-12-22 08:04:08,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14662 to 10779. [2020-12-22 08:04:08,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10779 states. [2020-12-22 08:04:08,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10779 states to 10779 states and 17302 transitions. [2020-12-22 08:04:08,949 INFO L78 Accepts]: Start accepts. Automaton has 10779 states and 17302 transitions. Word has length 68 [2020-12-22 08:04:08,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:08,949 INFO L481 AbstractCegarLoop]: Abstraction has 10779 states and 17302 transitions. [2020-12-22 08:04:08,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:04:08,949 INFO L276 IsEmpty]: Start isEmpty. Operand 10779 states and 17302 transitions. [2020-12-22 08:04:08,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 08:04:08,950 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:08,950 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] [2020-12-22 08:04:08,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:04:08,951 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:08,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:08,951 INFO L82 PathProgramCache]: Analyzing trace with hash -164512453, now seen corresponding path program 1 times [2020-12-22 08:04:08,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:08,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106194085] [2020-12-22 08:04:08,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:09,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:09,109 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 08:04:09,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106194085] [2020-12-22 08:04:09,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:09,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:04:09,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772591727] [2020-12-22 08:04:09,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:04:09,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:09,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:04:09,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:04:09,116 INFO L87 Difference]: Start difference. First operand 10779 states and 17302 transitions. Second operand 4 states. [2020-12-22 08:04:10,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:10,441 INFO L93 Difference]: Finished difference Result 31699 states and 50901 transitions. [2020-12-22 08:04:10,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:04:10,441 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-12-22 08:04:10,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:10,497 INFO L225 Difference]: With dead ends: 31699 [2020-12-22 08:04:10,498 INFO L226 Difference]: Without dead ends: 20929 [2020-12-22 08:04:10,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:04:10,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20929 states. [2020-12-22 08:04:11,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20929 to 20927. [2020-12-22 08:04:11,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20927 states. [2020-12-22 08:04:11,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20927 states to 20927 states and 33387 transitions. [2020-12-22 08:04:11,952 INFO L78 Accepts]: Start accepts. Automaton has 20927 states and 33387 transitions. Word has length 71 [2020-12-22 08:04:11,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:11,953 INFO L481 AbstractCegarLoop]: Abstraction has 20927 states and 33387 transitions. [2020-12-22 08:04:11,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:04:11,953 INFO L276 IsEmpty]: Start isEmpty. Operand 20927 states and 33387 transitions. [2020-12-22 08:04:11,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 08:04:11,954 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:11,954 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] [2020-12-22 08:04:11,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:04:11,955 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:11,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:11,955 INFO L82 PathProgramCache]: Analyzing trace with hash 667892135, now seen corresponding path program 1 times [2020-12-22 08:04:11,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:11,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700276076] [2020-12-22 08:04:11,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:11,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:12,001 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 08:04:12,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700276076] [2020-12-22 08:04:12,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:12,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:04:12,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243735613] [2020-12-22 08:04:12,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:04:12,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:12,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:04:12,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:04:12,004 INFO L87 Difference]: Start difference. First operand 20927 states and 33387 transitions. Second operand 3 states. [2020-12-22 08:04:14,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:14,263 INFO L93 Difference]: Finished difference Result 62743 states and 100099 transitions. [2020-12-22 08:04:14,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:04:14,264 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-22 08:04:14,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:14,366 INFO L225 Difference]: With dead ends: 62743 [2020-12-22 08:04:14,366 INFO L226 Difference]: Without dead ends: 41844 [2020-12-22 08:04:14,405 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 08:04:14,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41844 states. [2020-12-22 08:04:16,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41844 to 20929. [2020-12-22 08:04:16,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20929 states. [2020-12-22 08:04:16,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20929 states to 20929 states and 33389 transitions. [2020-12-22 08:04:16,077 INFO L78 Accepts]: Start accepts. Automaton has 20929 states and 33389 transitions. Word has length 72 [2020-12-22 08:04:16,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:16,077 INFO L481 AbstractCegarLoop]: Abstraction has 20929 states and 33389 transitions. [2020-12-22 08:04:16,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:04:16,077 INFO L276 IsEmpty]: Start isEmpty. Operand 20929 states and 33389 transitions. [2020-12-22 08:04:16,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 08:04:16,078 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:16,079 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] [2020-12-22 08:04:16,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:04:16,079 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:16,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:16,080 INFO L82 PathProgramCache]: Analyzing trace with hash -808520295, now seen corresponding path program 1 times [2020-12-22 08:04:16,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:16,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889211863] [2020-12-22 08:04:16,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:16,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:16,162 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 08:04:16,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889211863] [2020-12-22 08:04:16,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:16,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:04:16,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306858073] [2020-12-22 08:04:16,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:04:16,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:16,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:04:16,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:04:16,165 INFO L87 Difference]: Start difference. First operand 20929 states and 33389 transitions. Second operand 3 states. [2020-12-22 08:04:18,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:18,525 INFO L93 Difference]: Finished difference Result 61383 states and 97998 transitions. [2020-12-22 08:04:18,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:04:18,526 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 73 [2020-12-22 08:04:18,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:18,603 INFO L225 Difference]: With dead ends: 61383 [2020-12-22 08:04:18,603 INFO L226 Difference]: Without dead ends: 40610 [2020-12-22 08:04:18,631 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 08:04:18,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40610 states. [2020-12-22 08:04:21,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40610 to 40608. [2020-12-22 08:04:21,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40608 states. [2020-12-22 08:04:21,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40608 states to 40608 states and 64369 transitions. [2020-12-22 08:04:21,569 INFO L78 Accepts]: Start accepts. Automaton has 40608 states and 64369 transitions. Word has length 73 [2020-12-22 08:04:21,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:21,570 INFO L481 AbstractCegarLoop]: Abstraction has 40608 states and 64369 transitions. [2020-12-22 08:04:21,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:04:21,570 INFO L276 IsEmpty]: Start isEmpty. Operand 40608 states and 64369 transitions. [2020-12-22 08:04:21,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 08:04:21,571 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:21,572 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] [2020-12-22 08:04:21,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:04:21,572 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:21,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:21,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1547459556, now seen corresponding path program 1 times [2020-12-22 08:04:21,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:21,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501167616] [2020-12-22 08:04:21,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:21,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:21,730 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 08:04:21,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501167616] [2020-12-22 08:04:21,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:21,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:04:21,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216911154] [2020-12-22 08:04:21,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:04:21,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:21,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:04:21,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:04:21,733 INFO L87 Difference]: Start difference. First operand 40608 states and 64369 transitions. Second operand 5 states. [2020-12-22 08:04:26,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:26,646 INFO L93 Difference]: Finished difference Result 119148 states and 188934 transitions. [2020-12-22 08:04:26,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:04:26,646 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 73 [2020-12-22 08:04:26,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:26,797 INFO L225 Difference]: With dead ends: 119148 [2020-12-22 08:04:26,798 INFO L226 Difference]: Without dead ends: 78554 [2020-12-22 08:04:26,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:04:26,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78554 states. [2020-12-22 08:04:31,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78554 to 78552. [2020-12-22 08:04:31,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78552 states. [2020-12-22 08:04:32,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78552 states to 78552 states and 123683 transitions. [2020-12-22 08:04:32,257 INFO L78 Accepts]: Start accepts. Automaton has 78552 states and 123683 transitions. Word has length 73 [2020-12-22 08:04:32,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:32,257 INFO L481 AbstractCegarLoop]: Abstraction has 78552 states and 123683 transitions. [2020-12-22 08:04:32,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:04:32,258 INFO L276 IsEmpty]: Start isEmpty. Operand 78552 states and 123683 transitions. [2020-12-22 08:04:32,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 08:04:32,260 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:32,260 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] [2020-12-22 08:04:32,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:04:32,260 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:32,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:32,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1975872346, now seen corresponding path program 1 times [2020-12-22 08:04:32,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:32,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736860965] [2020-12-22 08:04:32,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:32,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:32,357 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 08:04:32,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736860965] [2020-12-22 08:04:32,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:32,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:04:32,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793490262] [2020-12-22 08:04:32,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:04:32,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:32,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:04:32,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:04:32,363 INFO L87 Difference]: Start difference. First operand 78552 states and 123683 transitions. Second operand 4 states. [2020-12-22 08:04:42,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:42,485 INFO L93 Difference]: Finished difference Result 230583 states and 363068 transitions. [2020-12-22 08:04:42,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:04:42,486 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-12-22 08:04:42,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:42,904 INFO L225 Difference]: With dead ends: 230583 [2020-12-22 08:04:42,905 INFO L226 Difference]: Without dead ends: 152087 [2020-12-22 08:04:42,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:04:43,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152087 states. [2020-12-22 08:04:53,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152087 to 152085. [2020-12-22 08:04:53,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152085 states. [2020-12-22 08:04:53,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152085 states to 152085 states and 237673 transitions. [2020-12-22 08:04:53,856 INFO L78 Accepts]: Start accepts. Automaton has 152085 states and 237673 transitions. Word has length 73 [2020-12-22 08:04:53,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:53,856 INFO L481 AbstractCegarLoop]: Abstraction has 152085 states and 237673 transitions. [2020-12-22 08:04:53,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:04:53,856 INFO L276 IsEmpty]: Start isEmpty. Operand 152085 states and 237673 transitions. [2020-12-22 08:04:53,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 08:04:53,859 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:53,860 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] [2020-12-22 08:04:53,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 08:04:53,860 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:53,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:53,861 INFO L82 PathProgramCache]: Analyzing trace with hash -2004902810, now seen corresponding path program 1 times [2020-12-22 08:04:53,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:53,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189591565] [2020-12-22 08:04:53,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:53,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:53,895 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 08:04:53,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189591565] [2020-12-22 08:04:53,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:53,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:04:53,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793646555] [2020-12-22 08:04:53,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:04:53,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:53,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:04:53,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:04:53,897 INFO L87 Difference]: Start difference. First operand 152085 states and 237673 transitions. Second operand 3 states. [2020-12-22 08:05:14,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:14,568 INFO L93 Difference]: Finished difference Result 456103 states and 712786 transitions. [2020-12-22 08:05:14,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:05:14,569 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2020-12-22 08:05:14,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:15,240 INFO L225 Difference]: With dead ends: 456103 [2020-12-22 08:05:15,240 INFO L226 Difference]: Without dead ends: 304109 [2020-12-22 08:05:15,416 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 08:05:15,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304109 states. [2020-12-22 08:05:28,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304109 to 152095. [2020-12-22 08:05:28,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152095 states. [2020-12-22 08:05:28,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152095 states to 152095 states and 237683 transitions. [2020-12-22 08:05:28,762 INFO L78 Accepts]: Start accepts. Automaton has 152095 states and 237683 transitions. Word has length 74 [2020-12-22 08:05:28,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:28,762 INFO L481 AbstractCegarLoop]: Abstraction has 152095 states and 237683 transitions. [2020-12-22 08:05:28,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:05:28,762 INFO L276 IsEmpty]: Start isEmpty. Operand 152095 states and 237683 transitions. [2020-12-22 08:05:28,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 08:05:28,765 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:28,765 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:05:28,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 08:05:28,766 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:28,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:28,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1175997191, now seen corresponding path program 1 times [2020-12-22 08:05:28,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:28,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864742218] [2020-12-22 08:05:28,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:28,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:28,885 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 08:05:28,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864742218] [2020-12-22 08:05:28,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:28,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:05:28,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043081986] [2020-12-22 08:05:28,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:05:28,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:28,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:05:28,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:05:28,890 INFO L87 Difference]: Start difference. First operand 152095 states and 237683 transitions. Second operand 4 states. [2020-12-22 08:05:52,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:52,222 INFO L93 Difference]: Finished difference Result 446123 states and 697112 transitions. [2020-12-22 08:05:52,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:05:52,223 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-12-22 08:05:52,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:53,001 INFO L225 Difference]: With dead ends: 446123 [2020-12-22 08:05:53,001 INFO L226 Difference]: Without dead ends: 294129 [2020-12-22 08:05:53,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:05:53,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294129 states.