/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.3.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:05:33,771 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:05:33,774 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:05:33,812 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:05:33,813 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:05:33,814 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:05:33,816 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:05:33,818 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:05:33,821 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:05:33,822 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:05:33,823 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:05:33,824 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:05:33,825 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:05:33,826 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:05:33,828 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:05:33,829 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:05:33,830 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:05:33,831 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:05:33,833 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:05:33,835 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:05:33,837 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:05:33,839 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:05:33,841 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:05:33,842 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:05:33,846 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:05:33,877 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:05:33,878 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:05:33,879 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:05:33,882 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:05:33,938 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:05:33,939 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:05:33,941 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:05:33,941 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:05:33,941 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:05:33,942 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:05:33,942 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:05:33,943 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:05:33,943 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:05:33,943 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:05:33,944 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:05:33,944 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:05:33,945 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:05:33,945 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:05:33,945 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:05:33,945 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:05:33,946 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:05:33,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:05:33,946 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:05:33,946 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:05:33,946 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:05:33,947 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:05:33,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:05:33,947 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:05:33,947 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:05:33,947 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:05:34,382 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:05:34,412 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:05:34,416 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:05:34,417 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:05:34,418 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:05:34,419 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 08:05:34,508 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9038eaca5/278db0a286b24cb1a82ecffe5f46cd90/FLAGe3a3be2c3 [2020-12-22 08:05:35,261 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:05:35,263 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 08:05:35,281 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9038eaca5/278db0a286b24cb1a82ecffe5f46cd90/FLAGe3a3be2c3 [2020-12-22 08:05:35,516 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9038eaca5/278db0a286b24cb1a82ecffe5f46cd90 [2020-12-22 08:05:35,519 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:05:35,521 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:05:35,524 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:05:35,524 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:05:35,530 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:05:35,531 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:05:35" (1/1) ... [2020-12-22 08:05:35,533 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ece550f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:35, skipping insertion in model container [2020-12-22 08:05:35,534 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:05:35" (1/1) ... [2020-12-22 08:05:35,548 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:05:35,629 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:05:36,029 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.3.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[13639,13652] [2020-12-22 08:05:36,125 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:05:36,141 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:05:36,259 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.3.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[13639,13652] [2020-12-22 08:05:36,369 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:05:36,417 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:05:36,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:36 WrapperNode [2020-12-22 08:05:36,418 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:05:36,420 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:05:36,420 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:05:36,420 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:05:36,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:36" (1/1) ... [2020-12-22 08:05:36,445 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:36" (1/1) ... [2020-12-22 08:05:36,523 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:05:36,524 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:05:36,525 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:05:36,525 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:05:36,546 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:36" (1/1) ... [2020-12-22 08:05:36,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:36" (1/1) ... [2020-12-22 08:05:36,562 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:36" (1/1) ... [2020-12-22 08:05:36,563 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:36" (1/1) ... [2020-12-22 08:05:36,593 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:36" (1/1) ... [2020-12-22 08:05:36,606 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:36" (1/1) ... [2020-12-22 08:05:36,611 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:36" (1/1) ... [2020-12-22 08:05:36,618 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:05:36,620 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:05:36,620 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:05:36,620 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:05:36,621 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:36" (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 08:05:36,748 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:05:36,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:05:36,748 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:05:36,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:05:38,191 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:05:38,192 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:05:38,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:05:38 BoogieIcfgContainer [2020-12-22 08:05:38,196 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:05:38,198 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:05:38,199 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:05:38,203 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:05:38,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:05:35" (1/3) ... [2020-12-22 08:05:38,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f8b066d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:05:38, skipping insertion in model container [2020-12-22 08:05:38,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:36" (2/3) ... [2020-12-22 08:05:38,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f8b066d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:05:38, skipping insertion in model container [2020-12-22 08:05:38,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:05:38" (3/3) ... [2020-12-22 08:05:38,209 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 08:05:38,217 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:05:38,223 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:05:38,244 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:05:38,293 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:05:38,293 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:05:38,293 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:05:38,293 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:05:38,294 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:05:38,294 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:05:38,294 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:05:38,294 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:05:38,329 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states. [2020-12-22 08:05:38,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-12-22 08:05:38,350 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:38,352 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:05:38,352 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:38,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:38,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1732515754, now seen corresponding path program 1 times [2020-12-22 08:05:38,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:38,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846370116] [2020-12-22 08:05:38,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:38,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:39,243 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 08:05:39,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846370116] [2020-12-22 08:05:39,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:39,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:05:39,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083992447] [2020-12-22 08:05:39,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:05:39,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:39,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:05:39,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:05:39,269 INFO L87 Difference]: Start difference. First operand 301 states. Second operand 4 states. [2020-12-22 08:05:39,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:39,487 INFO L93 Difference]: Finished difference Result 877 states and 1562 transitions. [2020-12-22 08:05:39,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:05:39,490 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 143 [2020-12-22 08:05:39,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:39,510 INFO L225 Difference]: With dead ends: 877 [2020-12-22 08:05:39,510 INFO L226 Difference]: Without dead ends: 579 [2020-12-22 08:05:39,516 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 08:05:39,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2020-12-22 08:05:39,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 577. [2020-12-22 08:05:39,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 577 states. [2020-12-22 08:05:39,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 836 transitions. [2020-12-22 08:05:39,634 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 836 transitions. Word has length 143 [2020-12-22 08:05:39,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:39,635 INFO L481 AbstractCegarLoop]: Abstraction has 577 states and 836 transitions. [2020-12-22 08:05:39,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:05:39,635 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 836 transitions. [2020-12-22 08:05:39,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-12-22 08:05:39,644 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:39,644 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:05:39,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:05:39,648 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:39,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:39,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1916078526, now seen corresponding path program 1 times [2020-12-22 08:05:39,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:39,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359935869] [2020-12-22 08:05:39,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:39,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:39,835 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 08:05:39,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359935869] [2020-12-22 08:05:39,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:39,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:05:39,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381709947] [2020-12-22 08:05:39,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:05:39,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:39,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:05:39,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:05:39,843 INFO L87 Difference]: Start difference. First operand 577 states and 836 transitions. Second operand 3 states. [2020-12-22 08:05:39,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:39,923 INFO L93 Difference]: Finished difference Result 1693 states and 2446 transitions. [2020-12-22 08:05:39,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:05:39,924 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 144 [2020-12-22 08:05:39,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:39,930 INFO L225 Difference]: With dead ends: 1693 [2020-12-22 08:05:39,931 INFO L226 Difference]: Without dead ends: 1144 [2020-12-22 08:05:39,934 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 08:05:39,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2020-12-22 08:05:39,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 579. [2020-12-22 08:05:39,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 579 states. [2020-12-22 08:05:39,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 838 transitions. [2020-12-22 08:05:39,989 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 838 transitions. Word has length 144 [2020-12-22 08:05:39,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:39,989 INFO L481 AbstractCegarLoop]: Abstraction has 579 states and 838 transitions. [2020-12-22 08:05:39,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:05:39,989 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 838 transitions. [2020-12-22 08:05:39,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-12-22 08:05:39,992 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:39,992 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:05:39,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:05:39,993 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:39,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:39,994 INFO L82 PathProgramCache]: Analyzing trace with hash 372219765, now seen corresponding path program 1 times [2020-12-22 08:05:39,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:39,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551108965] [2020-12-22 08:05:39,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:40,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:40,284 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 08:05:40,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551108965] [2020-12-22 08:05:40,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:40,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:05:40,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264216001] [2020-12-22 08:05:40,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:05:40,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:40,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:05:40,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:05:40,292 INFO L87 Difference]: Start difference. First operand 579 states and 838 transitions. Second operand 4 states. [2020-12-22 08:05:40,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:40,465 INFO L93 Difference]: Finished difference Result 1653 states and 2378 transitions. [2020-12-22 08:05:40,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:05:40,466 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 145 [2020-12-22 08:05:40,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:40,473 INFO L225 Difference]: With dead ends: 1653 [2020-12-22 08:05:40,474 INFO L226 Difference]: Without dead ends: 1104 [2020-12-22 08:05:40,475 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 08:05:40,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2020-12-22 08:05:40,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 1102. [2020-12-22 08:05:40,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1102 states. [2020-12-22 08:05:40,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1572 transitions. [2020-12-22 08:05:40,567 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1572 transitions. Word has length 145 [2020-12-22 08:05:40,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:40,576 INFO L481 AbstractCegarLoop]: Abstraction has 1102 states and 1572 transitions. [2020-12-22 08:05:40,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:05:40,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1572 transitions. [2020-12-22 08:05:40,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-12-22 08:05:40,583 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:40,584 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:05:40,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:05:40,584 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:40,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:40,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1286234625, now seen corresponding path program 1 times [2020-12-22 08:05:40,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:40,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138116853] [2020-12-22 08:05:40,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:40,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:40,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:05:40,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138116853] [2020-12-22 08:05:40,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:40,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:05:40,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455651525] [2020-12-22 08:05:40,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:05:40,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:40,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:05:40,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:05:40,703 INFO L87 Difference]: Start difference. First operand 1102 states and 1572 transitions. Second operand 3 states. [2020-12-22 08:05:40,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:40,854 INFO L93 Difference]: Finished difference Result 3230 states and 4596 transitions. [2020-12-22 08:05:40,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:05:40,855 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 146 [2020-12-22 08:05:40,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:40,867 INFO L225 Difference]: With dead ends: 3230 [2020-12-22 08:05:40,868 INFO L226 Difference]: Without dead ends: 2172 [2020-12-22 08:05:40,871 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 08:05:40,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2020-12-22 08:05:40,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 1106. [2020-12-22 08:05:40,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1106 states. [2020-12-22 08:05:40,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1106 states to 1106 states and 1576 transitions. [2020-12-22 08:05:40,988 INFO L78 Accepts]: Start accepts. Automaton has 1106 states and 1576 transitions. Word has length 146 [2020-12-22 08:05:40,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:40,990 INFO L481 AbstractCegarLoop]: Abstraction has 1106 states and 1576 transitions. [2020-12-22 08:05:40,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:05:40,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1106 states and 1576 transitions. [2020-12-22 08:05:40,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-12-22 08:05:40,993 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:40,993 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:05:40,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:05:40,994 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:40,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:40,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1557393051, now seen corresponding path program 1 times [2020-12-22 08:05:40,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:40,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490648363] [2020-12-22 08:05:40,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:41,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:41,134 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 08:05:41,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490648363] [2020-12-22 08:05:41,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:41,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:05:41,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362365561] [2020-12-22 08:05:41,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:05:41,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:41,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:05:41,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:05:41,138 INFO L87 Difference]: Start difference. First operand 1106 states and 1576 transitions. Second operand 3 states. [2020-12-22 08:05:41,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:41,357 INFO L93 Difference]: Finished difference Result 2922 states and 4192 transitions. [2020-12-22 08:05:41,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:05:41,359 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 147 [2020-12-22 08:05:41,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:41,375 INFO L225 Difference]: With dead ends: 2922 [2020-12-22 08:05:41,375 INFO L226 Difference]: Without dead ends: 2120 [2020-12-22 08:05:41,378 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 08:05:41,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2120 states. [2020-12-22 08:05:41,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2120 to 2118. [2020-12-22 08:05:41,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2118 states. [2020-12-22 08:05:41,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2118 states to 2118 states and 2984 transitions. [2020-12-22 08:05:41,665 INFO L78 Accepts]: Start accepts. Automaton has 2118 states and 2984 transitions. Word has length 147 [2020-12-22 08:05:41,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:41,666 INFO L481 AbstractCegarLoop]: Abstraction has 2118 states and 2984 transitions. [2020-12-22 08:05:41,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:05:41,667 INFO L276 IsEmpty]: Start isEmpty. Operand 2118 states and 2984 transitions. [2020-12-22 08:05:41,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-12-22 08:05:41,673 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:41,673 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:05:41,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:05:41,674 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:41,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:41,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1661864862, now seen corresponding path program 1 times [2020-12-22 08:05:41,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:41,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339388769] [2020-12-22 08:05:41,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:41,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:41,966 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 08:05:41,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339388769] [2020-12-22 08:05:41,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:41,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:05:41,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167450567] [2020-12-22 08:05:41,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:05:41,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:41,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:05:41,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:05:41,971 INFO L87 Difference]: Start difference. First operand 2118 states and 2984 transitions. Second operand 5 states. [2020-12-22 08:05:42,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:42,362 INFO L93 Difference]: Finished difference Result 5910 states and 8337 transitions. [2020-12-22 08:05:42,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:05:42,362 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2020-12-22 08:05:42,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:42,384 INFO L225 Difference]: With dead ends: 5910 [2020-12-22 08:05:42,384 INFO L226 Difference]: Without dead ends: 3829 [2020-12-22 08:05:42,391 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 08:05:42,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3829 states. [2020-12-22 08:05:42,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3829 to 3827. [2020-12-22 08:05:42,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3827 states. [2020-12-22 08:05:42,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3827 states to 3827 states and 5354 transitions. [2020-12-22 08:05:42,764 INFO L78 Accepts]: Start accepts. Automaton has 3827 states and 5354 transitions. Word has length 147 [2020-12-22 08:05:42,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:42,764 INFO L481 AbstractCegarLoop]: Abstraction has 3827 states and 5354 transitions. [2020-12-22 08:05:42,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:05:42,764 INFO L276 IsEmpty]: Start isEmpty. Operand 3827 states and 5354 transitions. [2020-12-22 08:05:42,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-12-22 08:05:42,772 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:42,772 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:05:42,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:05:42,773 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:42,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:42,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1862693396, now seen corresponding path program 1 times [2020-12-22 08:05:42,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:42,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361220521] [2020-12-22 08:05:42,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:42,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:42,980 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 08:05:42,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361220521] [2020-12-22 08:05:42,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:42,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:05:42,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855149656] [2020-12-22 08:05:42,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:05:42,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:42,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:05:42,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:05:42,983 INFO L87 Difference]: Start difference. First operand 3827 states and 5354 transitions. Second operand 4 states. [2020-12-22 08:05:43,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:43,402 INFO L93 Difference]: Finished difference Result 7881 states and 10938 transitions. [2020-12-22 08:05:43,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:05:43,403 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 147 [2020-12-22 08:05:43,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:43,424 INFO L225 Difference]: With dead ends: 7881 [2020-12-22 08:05:43,424 INFO L226 Difference]: Without dead ends: 4171 [2020-12-22 08:05:43,431 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 08:05:43,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4171 states. [2020-12-22 08:05:43,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4171 to 4031. [2020-12-22 08:05:43,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4031 states. [2020-12-22 08:05:43,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4031 states to 4031 states and 5578 transitions. [2020-12-22 08:05:43,799 INFO L78 Accepts]: Start accepts. Automaton has 4031 states and 5578 transitions. Word has length 147 [2020-12-22 08:05:43,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:43,801 INFO L481 AbstractCegarLoop]: Abstraction has 4031 states and 5578 transitions. [2020-12-22 08:05:43,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:05:43,801 INFO L276 IsEmpty]: Start isEmpty. Operand 4031 states and 5578 transitions. [2020-12-22 08:05:43,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 08:05:43,810 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:43,810 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:05:43,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:05:43,810 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:43,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:43,812 INFO L82 PathProgramCache]: Analyzing trace with hash -292089536, now seen corresponding path program 1 times [2020-12-22 08:05:43,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:43,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862574022] [2020-12-22 08:05:43,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:43,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:43,899 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 08:05:43,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862574022] [2020-12-22 08:05:43,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:43,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:05:43,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470963259] [2020-12-22 08:05:43,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:05:43,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:43,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:05:43,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:05:43,904 INFO L87 Difference]: Start difference. First operand 4031 states and 5578 transitions. Second operand 3 states. [2020-12-22 08:05:44,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:44,458 INFO L93 Difference]: Finished difference Result 11411 states and 15864 transitions. [2020-12-22 08:05:44,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:05:44,459 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 148 [2020-12-22 08:05:44,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:44,498 INFO L225 Difference]: With dead ends: 11411 [2020-12-22 08:05:44,498 INFO L226 Difference]: Without dead ends: 7937 [2020-12-22 08:05:44,505 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 08:05:44,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7937 states. [2020-12-22 08:05:44,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7937 to 4047. [2020-12-22 08:05:44,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4047 states. [2020-12-22 08:05:44,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4047 states to 4047 states and 5594 transitions. [2020-12-22 08:05:44,933 INFO L78 Accepts]: Start accepts. Automaton has 4047 states and 5594 transitions. Word has length 148 [2020-12-22 08:05:44,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:44,933 INFO L481 AbstractCegarLoop]: Abstraction has 4047 states and 5594 transitions. [2020-12-22 08:05:44,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:05:44,933 INFO L276 IsEmpty]: Start isEmpty. Operand 4047 states and 5594 transitions. [2020-12-22 08:05:44,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 08:05:44,941 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:44,941 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:05:44,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:05:44,941 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:44,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:44,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1315250227, now seen corresponding path program 1 times [2020-12-22 08:05:44,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:44,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955268314] [2020-12-22 08:05:44,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:45,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:45,129 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 08:05:45,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955268314] [2020-12-22 08:05:45,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:45,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:05:45,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835281637] [2020-12-22 08:05:45,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:05:45,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:45,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:05:45,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:05:45,137 INFO L87 Difference]: Start difference. First operand 4047 states and 5594 transitions. Second operand 4 states. [2020-12-22 08:05:45,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:45,498 INFO L93 Difference]: Finished difference Result 8084 states and 11174 transitions. [2020-12-22 08:05:45,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:05:45,498 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-12-22 08:05:45,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:45,539 INFO L225 Difference]: With dead ends: 8084 [2020-12-22 08:05:45,539 INFO L226 Difference]: Without dead ends: 4045 [2020-12-22 08:05:45,548 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 08:05:45,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4045 states. [2020-12-22 08:05:45,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4045 to 4045. [2020-12-22 08:05:45,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4045 states. [2020-12-22 08:05:45,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4045 states to 4045 states and 5590 transitions. [2020-12-22 08:05:45,846 INFO L78 Accepts]: Start accepts. Automaton has 4045 states and 5590 transitions. Word has length 149 [2020-12-22 08:05:45,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:45,846 INFO L481 AbstractCegarLoop]: Abstraction has 4045 states and 5590 transitions. [2020-12-22 08:05:45,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:05:45,846 INFO L276 IsEmpty]: Start isEmpty. Operand 4045 states and 5590 transitions. [2020-12-22 08:05:45,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 08:05:45,857 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:45,858 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:05:45,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:05:45,858 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:45,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:45,858 INFO L82 PathProgramCache]: Analyzing trace with hash 867432798, now seen corresponding path program 1 times [2020-12-22 08:05:45,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:45,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249458636] [2020-12-22 08:05:45,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:45,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:45,995 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 08:05:45,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249458636] [2020-12-22 08:05:45,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:45,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:05:45,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168381856] [2020-12-22 08:05:45,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:05:45,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:45,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:05:45,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:05:45,998 INFO L87 Difference]: Start difference. First operand 4045 states and 5590 transitions. Second operand 3 states. [2020-12-22 08:05:46,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:46,524 INFO L93 Difference]: Finished difference Result 8936 states and 12473 transitions. [2020-12-22 08:05:46,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:05:46,525 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 149 [2020-12-22 08:05:46,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:46,541 INFO L225 Difference]: With dead ends: 8936 [2020-12-22 08:05:46,541 INFO L226 Difference]: Without dead ends: 5990 [2020-12-22 08:05:46,548 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 08:05:46,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5990 states. [2020-12-22 08:05:47,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5990 to 5988. [2020-12-22 08:05:47,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5988 states. [2020-12-22 08:05:47,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5988 states to 5988 states and 8143 transitions. [2020-12-22 08:05:47,085 INFO L78 Accepts]: Start accepts. Automaton has 5988 states and 8143 transitions. Word has length 149 [2020-12-22 08:05:47,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:47,085 INFO L481 AbstractCegarLoop]: Abstraction has 5988 states and 8143 transitions. [2020-12-22 08:05:47,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:05:47,085 INFO L276 IsEmpty]: Start isEmpty. Operand 5988 states and 8143 transitions. [2020-12-22 08:05:47,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-12-22 08:05:47,096 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:47,097 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:05:47,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:05:47,097 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:47,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:47,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1284666434, now seen corresponding path program 1 times [2020-12-22 08:05:47,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:47,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604253320] [2020-12-22 08:05:47,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:47,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:47,367 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 08:05:47,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604253320] [2020-12-22 08:05:47,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:47,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:05:47,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481281419] [2020-12-22 08:05:47,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:05:47,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:47,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:05:47,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:05:47,372 INFO L87 Difference]: Start difference. First operand 5988 states and 8143 transitions. Second operand 10 states. [2020-12-22 08:05:50,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:50,090 INFO L93 Difference]: Finished difference Result 20575 states and 30158 transitions. [2020-12-22 08:05:50,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 08:05:50,091 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 152 [2020-12-22 08:05:50,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:50,131 INFO L225 Difference]: With dead ends: 20575 [2020-12-22 08:05:50,131 INFO L226 Difference]: Without dead ends: 16628 [2020-12-22 08:05:50,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2020-12-22 08:05:50,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16628 states. [2020-12-22 08:05:51,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16628 to 12216. [2020-12-22 08:05:51,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12216 states. [2020-12-22 08:05:51,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12216 states to 12216 states and 17343 transitions. [2020-12-22 08:05:51,626 INFO L78 Accepts]: Start accepts. Automaton has 12216 states and 17343 transitions. Word has length 152 [2020-12-22 08:05:51,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:51,626 INFO L481 AbstractCegarLoop]: Abstraction has 12216 states and 17343 transitions. [2020-12-22 08:05:51,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:05:51,626 INFO L276 IsEmpty]: Start isEmpty. Operand 12216 states and 17343 transitions. [2020-12-22 08:05:51,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-12-22 08:05:51,643 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:51,643 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:05:51,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:05:51,643 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:51,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:51,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1824421472, now seen corresponding path program 1 times [2020-12-22 08:05:51,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:51,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841909263] [2020-12-22 08:05:51,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:51,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:51,841 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 08:05:51,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841909263] [2020-12-22 08:05:51,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:51,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:05:51,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127806217] [2020-12-22 08:05:51,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:05:51,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:51,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:05:51,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:05:51,844 INFO L87 Difference]: Start difference. First operand 12216 states and 17343 transitions. Second operand 4 states. [2020-12-22 08:05:53,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:53,292 INFO L93 Difference]: Finished difference Result 20712 states and 30893 transitions. [2020-12-22 08:05:53,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:05:53,293 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 152 [2020-12-22 08:05:53,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:53,330 INFO L225 Difference]: With dead ends: 20712 [2020-12-22 08:05:53,330 INFO L226 Difference]: Without dead ends: 14442 [2020-12-22 08:05:53,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 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 08:05:53,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14442 states. [2020-12-22 08:05:54,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14442 to 14440. [2020-12-22 08:05:54,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14440 states. [2020-12-22 08:05:54,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14440 states to 14440 states and 20763 transitions. [2020-12-22 08:05:54,591 INFO L78 Accepts]: Start accepts. Automaton has 14440 states and 20763 transitions. Word has length 152 [2020-12-22 08:05:54,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:54,592 INFO L481 AbstractCegarLoop]: Abstraction has 14440 states and 20763 transitions. [2020-12-22 08:05:54,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:05:54,592 INFO L276 IsEmpty]: Start isEmpty. Operand 14440 states and 20763 transitions. [2020-12-22 08:05:54,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-12-22 08:05:54,608 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:54,609 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:05:54,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:05:54,609 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:54,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:54,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1841812308, now seen corresponding path program 1 times [2020-12-22 08:05:54,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:54,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004559293] [2020-12-22 08:05:54,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:54,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:54,823 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 08:05:54,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004559293] [2020-12-22 08:05:54,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:54,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:05:54,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057788152] [2020-12-22 08:05:54,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:05:54,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:54,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:05:54,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:05:54,826 INFO L87 Difference]: Start difference. First operand 14440 states and 20763 transitions. Second operand 4 states. [2020-12-22 08:05:57,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:57,025 INFO L93 Difference]: Finished difference Result 37181 states and 53601 transitions. [2020-12-22 08:05:57,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:05:57,026 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 152 [2020-12-22 08:05:57,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:57,081 INFO L225 Difference]: With dead ends: 37181 [2020-12-22 08:05:57,081 INFO L226 Difference]: Without dead ends: 23059 [2020-12-22 08:05:57,101 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 08:05:57,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23059 states. [2020-12-22 08:05:58,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23059 to 23057. [2020-12-22 08:05:58,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23057 states. [2020-12-22 08:05:58,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23057 states to 23057 states and 32850 transitions. [2020-12-22 08:05:58,824 INFO L78 Accepts]: Start accepts. Automaton has 23057 states and 32850 transitions. Word has length 152 [2020-12-22 08:05:58,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:58,825 INFO L481 AbstractCegarLoop]: Abstraction has 23057 states and 32850 transitions. [2020-12-22 08:05:58,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:05:58,825 INFO L276 IsEmpty]: Start isEmpty. Operand 23057 states and 32850 transitions. [2020-12-22 08:05:58,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-12-22 08:05:58,857 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:58,857 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:05:58,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:05:58,857 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:58,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:58,858 INFO L82 PathProgramCache]: Analyzing trace with hash -8512359, now seen corresponding path program 1 times [2020-12-22 08:05:58,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:58,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62504175] [2020-12-22 08:05:58,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:58,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:59,001 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 08:05:59,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62504175] [2020-12-22 08:05:59,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:59,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:05:59,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947228519] [2020-12-22 08:05:59,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:05:59,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:59,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:05:59,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:05:59,004 INFO L87 Difference]: Start difference. First operand 23057 states and 32850 transitions. Second operand 4 states. [2020-12-22 08:06:00,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:00,315 INFO L93 Difference]: Finished difference Result 36603 states and 52226 transitions. [2020-12-22 08:06:00,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:06:00,316 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 154 [2020-12-22 08:06:00,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:00,361 INFO L225 Difference]: With dead ends: 36603 [2020-12-22 08:06:00,361 INFO L226 Difference]: Without dead ends: 18789 [2020-12-22 08:06:00,387 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 08:06:00,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18789 states. [2020-12-22 08:06:01,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18789 to 18789. [2020-12-22 08:06:01,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18789 states. [2020-12-22 08:06:01,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18789 states to 18789 states and 26647 transitions. [2020-12-22 08:06:01,986 INFO L78 Accepts]: Start accepts. Automaton has 18789 states and 26647 transitions. Word has length 154 [2020-12-22 08:06:01,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:01,986 INFO L481 AbstractCegarLoop]: Abstraction has 18789 states and 26647 transitions. [2020-12-22 08:06:01,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:06:01,986 INFO L276 IsEmpty]: Start isEmpty. Operand 18789 states and 26647 transitions. [2020-12-22 08:06:02,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-12-22 08:06:02,005 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:02,005 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:06:02,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:06:02,006 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:02,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:02,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1625804197, now seen corresponding path program 1 times [2020-12-22 08:06:02,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:02,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565121399] [2020-12-22 08:06:02,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:02,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:02,085 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 08:06:02,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565121399] [2020-12-22 08:06:02,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:02,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:06:02,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365085295] [2020-12-22 08:06:02,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:06:02,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:02,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:06:02,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:02,088 INFO L87 Difference]: Start difference. First operand 18789 states and 26647 transitions. Second operand 3 states. [2020-12-22 08:06:04,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:04,751 INFO L93 Difference]: Finished difference Result 49849 states and 71779 transitions. [2020-12-22 08:06:04,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:06:04,752 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 157 [2020-12-22 08:06:04,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:04,816 INFO L225 Difference]: With dead ends: 49849 [2020-12-22 08:06:04,816 INFO L226 Difference]: Without dead ends: 36351 [2020-12-22 08:06:04,839 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 08:06:04,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36351 states. [2020-12-22 08:06:07,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36351 to 36349. [2020-12-22 08:06:07,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36349 states. [2020-12-22 08:06:08,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36349 states to 36349 states and 51513 transitions. [2020-12-22 08:06:08,042 INFO L78 Accepts]: Start accepts. Automaton has 36349 states and 51513 transitions. Word has length 157 [2020-12-22 08:06:08,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:08,042 INFO L481 AbstractCegarLoop]: Abstraction has 36349 states and 51513 transitions. [2020-12-22 08:06:08,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:06:08,043 INFO L276 IsEmpty]: Start isEmpty. Operand 36349 states and 51513 transitions. [2020-12-22 08:06:08,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-12-22 08:06:08,071 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:08,071 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:06:08,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:06:08,072 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:08,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:08,072 INFO L82 PathProgramCache]: Analyzing trace with hash -235404352, now seen corresponding path program 1 times [2020-12-22 08:06:08,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:08,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95940797] [2020-12-22 08:06:08,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:08,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:08,280 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 08:06:08,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95940797] [2020-12-22 08:06:08,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:08,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 08:06:08,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214264962] [2020-12-22 08:06:08,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 08:06:08,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:08,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 08:06:08,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 08:06:08,283 INFO L87 Difference]: Start difference. First operand 36349 states and 51513 transitions. Second operand 9 states. [2020-12-22 08:06:20,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:20,925 INFO L93 Difference]: Finished difference Result 167897 states and 247432 transitions. [2020-12-22 08:06:20,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 08:06:20,925 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 157 [2020-12-22 08:06:20,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:21,243 INFO L225 Difference]: With dead ends: 167897 [2020-12-22 08:06:21,244 INFO L226 Difference]: Without dead ends: 137037 [2020-12-22 08:06:21,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-12-22 08:06:21,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137037 states. [2020-12-22 08:06:30,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137037 to 96453. [2020-12-22 08:06:30,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96453 states. [2020-12-22 08:06:30,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96453 states to 96453 states and 139501 transitions. [2020-12-22 08:06:30,879 INFO L78 Accepts]: Start accepts. Automaton has 96453 states and 139501 transitions. Word has length 157 [2020-12-22 08:06:30,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:30,880 INFO L481 AbstractCegarLoop]: Abstraction has 96453 states and 139501 transitions. [2020-12-22 08:06:30,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 08:06:30,880 INFO L276 IsEmpty]: Start isEmpty. Operand 96453 states and 139501 transitions. [2020-12-22 08:06:31,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-12-22 08:06:31,115 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:31,115 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:06:31,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 08:06:31,116 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:31,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:31,129 INFO L82 PathProgramCache]: Analyzing trace with hash -408973622, now seen corresponding path program 1 times [2020-12-22 08:06:31,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:31,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664419726] [2020-12-22 08:06:31,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:31,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:31,329 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 08:06:31,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664419726] [2020-12-22 08:06:31,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:31,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:06:31,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238161473] [2020-12-22 08:06:31,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:06:31,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:31,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:06:31,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:06:31,333 INFO L87 Difference]: Start difference. First operand 96453 states and 139501 transitions. Second operand 4 states. [2020-12-22 08:06:41,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:41,440 INFO L93 Difference]: Finished difference Result 185673 states and 276655 transitions. [2020-12-22 08:06:41,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:06:41,440 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 157 [2020-12-22 08:06:41,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:41,673 INFO L225 Difference]: With dead ends: 185673 [2020-12-22 08:06:41,673 INFO L226 Difference]: Without dead ends: 118119 [2020-12-22 08:06:41,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 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 08:06:42,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118119 states. [2020-12-22 08:06:52,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118119 to 118117. [2020-12-22 08:06:52,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118117 states. [2020-12-22 08:06:52,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118117 states to 118117 states and 171597 transitions. [2020-12-22 08:06:52,687 INFO L78 Accepts]: Start accepts. Automaton has 118117 states and 171597 transitions. Word has length 157 [2020-12-22 08:06:52,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:52,688 INFO L481 AbstractCegarLoop]: Abstraction has 118117 states and 171597 transitions. [2020-12-22 08:06:52,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:06:52,688 INFO L276 IsEmpty]: Start isEmpty. Operand 118117 states and 171597 transitions. [2020-12-22 08:06:53,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-12-22 08:06:53,001 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:53,001 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:06:53,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 08:06:53,002 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:53,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:53,015 INFO L82 PathProgramCache]: Analyzing trace with hash -574629782, now seen corresponding path program 1 times [2020-12-22 08:06:53,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:53,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549195966] [2020-12-22 08:06:53,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:53,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:53,260 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 08:06:53,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549195966] [2020-12-22 08:06:53,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:53,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:06:53,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081348253] [2020-12-22 08:06:53,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:06:53,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:53,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:06:53,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:06:53,268 INFO L87 Difference]: Start difference. First operand 118117 states and 171597 transitions. Second operand 5 states. [2020-12-22 08:07:20,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:07:20,923 INFO L93 Difference]: Finished difference Result 347909 states and 520713 transitions. [2020-12-22 08:07:20,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:07:20,924 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 157 [2020-12-22 08:07:20,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:07:21,767 INFO L225 Difference]: With dead ends: 347909 [2020-12-22 08:07:21,767 INFO L226 Difference]: Without dead ends: 301955 [2020-12-22 08:07:21,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:07:22,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301955 states.