/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.BOUNDED-16.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:59:58,750 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:59:58,753 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:59:58,804 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 08:59:58,834 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:59:58,838 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:59:58,840 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:59:58,842 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:59:58,843 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:59:58,847 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:59:58,862 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:59:58,867 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:59:58,870 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:59:58,874 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:59:58,876 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:59:58,877 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:59:58,887 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:59:58,902 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:59:58,903 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:59:58,904 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:59:58,905 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:59:58,956 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:59:58,957 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:59:58,962 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:59:58,963 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:59:58,963 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:59:58,963 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:59:58,963 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:59:58,963 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:59:58,964 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:59:58,964 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:59:58,966 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:59:58,966 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:59:58,966 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:59:58,966 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:59:58,967 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:59:58,967 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:59:58,967 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:59:58,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:59:58,967 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:59:58,968 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:59:58,968 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:59:58,968 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:59:58,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:59:58,969 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:59:58,969 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:59:58,969 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:59:59,377 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:59:59,407 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:59:59,410 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:59:59,411 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:59:59,412 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:59:59,413 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.BOUNDED-16.pals.c.v+nlh-reducer.c [2020-12-22 08:59:59,510 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1047d6913/6d1ab6bbb5e74d739c666b49708549e0/FLAGec5054aa1 [2020-12-22 09:00:00,254 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:00:00,255 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.BOUNDED-16.pals.c.v+nlh-reducer.c [2020-12-22 09:00:00,269 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1047d6913/6d1ab6bbb5e74d739c666b49708549e0/FLAGec5054aa1 [2020-12-22 09:00:00,561 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1047d6913/6d1ab6bbb5e74d739c666b49708549e0 [2020-12-22 09:00:00,564 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:00:00,568 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:00:00,571 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:00:00,572 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:00:00,576 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:00:00,578 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:00:00" (1/1) ... [2020-12-22 09:00:00,580 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54d56412 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:00:00, skipping insertion in model container [2020-12-22 09:00:00,580 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:00:00" (1/1) ... [2020-12-22 09:00:00,589 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:00:00,669 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:00:01,064 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.BOUNDED-16.pals.c.v+nlh-reducer.c[11425,11438] [2020-12-22 09:00:01,223 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:00:01,240 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:00:01,328 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.BOUNDED-16.pals.c.v+nlh-reducer.c[11425,11438] [2020-12-22 09:00:01,425 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:00:01,449 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:00:01,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:00:01 WrapperNode [2020-12-22 09:00:01,450 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:00:01,451 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:00:01,451 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:00:01,451 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:00:01,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:00:01" (1/1) ... [2020-12-22 09:00:01,479 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:00:01" (1/1) ... [2020-12-22 09:00:01,547 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:00:01,548 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:00:01,549 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:00:01,549 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:00:01,559 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:00:01" (1/1) ... [2020-12-22 09:00:01,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:00:01" (1/1) ... [2020-12-22 09:00:01,569 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:00:01" (1/1) ... [2020-12-22 09:00:01,569 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:00:01" (1/1) ... [2020-12-22 09:00:01,588 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:00:01" (1/1) ... [2020-12-22 09:00:01,599 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:00:01" (1/1) ... [2020-12-22 09:00:01,604 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:00:01" (1/1) ... [2020-12-22 09:00:01,611 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:00:01,612 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:00:01,612 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:00:01,612 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:00:01,613 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:00:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:00:01,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:00:01,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:00:01,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:00:01,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:00:03,093 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:00:03,093 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 09:00:03,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:00:03 BoogieIcfgContainer [2020-12-22 09:00:03,097 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:00:03,101 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:00:03,102 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:00:03,105 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:00:03,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:00:00" (1/3) ... [2020-12-22 09:00:03,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fdb47b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:00:03, skipping insertion in model container [2020-12-22 09:00:03,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:00:01" (2/3) ... [2020-12-22 09:00:03,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fdb47b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:00:03, skipping insertion in model container [2020-12-22 09:00:03,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:00:03" (3/3) ... [2020-12-22 09:00:03,113 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.1.ufo.BOUNDED-16.pals.c.v+nlh-reducer.c [2020-12-22 09:00:03,121 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:00:03,126 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 09:00:03,146 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 09:00:03,176 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:00:03,176 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:00:03,177 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:00:03,177 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:00:03,177 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:00:03,177 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:00:03,177 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:00:03,177 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:00:03,199 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states. [2020-12-22 09:00:03,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-22 09:00:03,213 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:00:03,214 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] [2020-12-22 09:00:03,215 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:00:03,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:00:03,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1788351764, now seen corresponding path program 1 times [2020-12-22 09:00:03,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:00:03,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940921471] [2020-12-22 09:00:03,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:00:03,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:00:03,893 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 09:00:03,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940921471] [2020-12-22 09:00:03,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:00:03,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:00:03,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60088875] [2020-12-22 09:00:03,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:00:03,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:00:03,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:00:03,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:00:03,922 INFO L87 Difference]: Start difference. First operand 232 states. Second operand 3 states. [2020-12-22 09:00:04,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:00:04,141 INFO L93 Difference]: Finished difference Result 447 states and 750 transitions. [2020-12-22 09:00:04,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:00:04,143 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 125 [2020-12-22 09:00:04,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:00:04,161 INFO L225 Difference]: With dead ends: 447 [2020-12-22 09:00:04,161 INFO L226 Difference]: Without dead ends: 347 [2020-12-22 09:00:04,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:00:04,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-12-22 09:00:04,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 345. [2020-12-22 09:00:04,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-12-22 09:00:04,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 494 transitions. [2020-12-22 09:00:04,251 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 494 transitions. Word has length 125 [2020-12-22 09:00:04,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:00:04,252 INFO L481 AbstractCegarLoop]: Abstraction has 345 states and 494 transitions. [2020-12-22 09:00:04,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:00:04,253 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 494 transitions. [2020-12-22 09:00:04,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 09:00:04,266 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:00:04,267 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] [2020-12-22 09:00:04,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:00:04,267 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:00:04,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:00:04,270 INFO L82 PathProgramCache]: Analyzing trace with hash 649831019, now seen corresponding path program 1 times [2020-12-22 09:00:04,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:00:04,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78482011] [2020-12-22 09:00:04,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:00:04,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:00:04,571 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 09:00:04,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78482011] [2020-12-22 09:00:04,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:00:04,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:00:04,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864586136] [2020-12-22 09:00:04,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:00:04,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:00:04,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:00:04,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:00:04,576 INFO L87 Difference]: Start difference. First operand 345 states and 494 transitions. Second operand 5 states. [2020-12-22 09:00:04,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:00:04,865 INFO L93 Difference]: Finished difference Result 594 states and 884 transitions. [2020-12-22 09:00:04,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:00:04,865 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 127 [2020-12-22 09:00:04,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:00:04,874 INFO L225 Difference]: With dead ends: 594 [2020-12-22 09:00:04,874 INFO L226 Difference]: Without dead ends: 345 [2020-12-22 09:00:04,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:00:04,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-12-22 09:00:04,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 345. [2020-12-22 09:00:04,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-12-22 09:00:04,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 491 transitions. [2020-12-22 09:00:04,967 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 491 transitions. Word has length 127 [2020-12-22 09:00:04,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:00:04,968 INFO L481 AbstractCegarLoop]: Abstraction has 345 states and 491 transitions. [2020-12-22 09:00:04,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:00:04,968 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 491 transitions. [2020-12-22 09:00:04,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-12-22 09:00:04,971 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:00:04,971 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] [2020-12-22 09:00:04,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:00:04,972 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:00:04,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:00:04,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1429562389, now seen corresponding path program 1 times [2020-12-22 09:00:04,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:00:04,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340485344] [2020-12-22 09:00:04,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:00:05,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:00:05,177 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 09:00:05,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340485344] [2020-12-22 09:00:05,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:00:05,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:00:05,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300890561] [2020-12-22 09:00:05,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:00:05,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:00:05,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:00:05,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:00:05,183 INFO L87 Difference]: Start difference. First operand 345 states and 491 transitions. Second operand 5 states. [2020-12-22 09:00:05,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:00:05,473 INFO L93 Difference]: Finished difference Result 602 states and 888 transitions. [2020-12-22 09:00:05,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:00:05,474 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 128 [2020-12-22 09:00:05,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:00:05,477 INFO L225 Difference]: With dead ends: 602 [2020-12-22 09:00:05,477 INFO L226 Difference]: Without dead ends: 345 [2020-12-22 09:00:05,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:00:05,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-12-22 09:00:05,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 345. [2020-12-22 09:00:05,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-12-22 09:00:05,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 488 transitions. [2020-12-22 09:00:05,501 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 488 transitions. Word has length 128 [2020-12-22 09:00:05,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:00:05,501 INFO L481 AbstractCegarLoop]: Abstraction has 345 states and 488 transitions. [2020-12-22 09:00:05,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:00:05,502 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 488 transitions. [2020-12-22 09:00:05,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 09:00:05,504 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:00:05,504 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] [2020-12-22 09:00:05,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:00:05,505 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:00:05,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:00:05,506 INFO L82 PathProgramCache]: Analyzing trace with hash -2005547413, now seen corresponding path program 1 times [2020-12-22 09:00:05,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:00:05,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683520639] [2020-12-22 09:00:05,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:00:05,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:00:05,705 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 09:00:05,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683520639] [2020-12-22 09:00:05,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:00:05,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:00:05,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700423383] [2020-12-22 09:00:05,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:00:05,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:00:05,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:00:05,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:00:05,713 INFO L87 Difference]: Start difference. First operand 345 states and 488 transitions. Second operand 6 states. [2020-12-22 09:00:06,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:00:06,081 INFO L93 Difference]: Finished difference Result 853 states and 1267 transitions. [2020-12-22 09:00:06,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:00:06,082 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 129 [2020-12-22 09:00:06,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:00:06,086 INFO L225 Difference]: With dead ends: 853 [2020-12-22 09:00:06,086 INFO L226 Difference]: Without dead ends: 576 [2020-12-22 09:00:06,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:00:06,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2020-12-22 09:00:06,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 574. [2020-12-22 09:00:06,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 574 states. [2020-12-22 09:00:06,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 844 transitions. [2020-12-22 09:00:06,138 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 844 transitions. Word has length 129 [2020-12-22 09:00:06,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:00:06,138 INFO L481 AbstractCegarLoop]: Abstraction has 574 states and 844 transitions. [2020-12-22 09:00:06,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:00:06,139 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 844 transitions. [2020-12-22 09:00:06,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 09:00:06,141 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:00:06,141 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] [2020-12-22 09:00:06,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:00:06,141 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:00:06,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:00:06,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1050652511, now seen corresponding path program 1 times [2020-12-22 09:00:06,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:00:06,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489666541] [2020-12-22 09:00:06,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:00:06,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:00:06,350 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 09:00:06,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489666541] [2020-12-22 09:00:06,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:00:06,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:00:06,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128878461] [2020-12-22 09:00:06,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:00:06,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:00:06,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:00:06,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:00:06,353 INFO L87 Difference]: Start difference. First operand 574 states and 844 transitions. Second operand 6 states. [2020-12-22 09:00:06,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:00:06,718 INFO L93 Difference]: Finished difference Result 1452 states and 2201 transitions. [2020-12-22 09:00:06,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:00:06,719 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 130 [2020-12-22 09:00:06,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:00:06,725 INFO L225 Difference]: With dead ends: 1452 [2020-12-22 09:00:06,726 INFO L226 Difference]: Without dead ends: 962 [2020-12-22 09:00:06,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:00:06,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2020-12-22 09:00:06,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 960. [2020-12-22 09:00:06,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 960 states. [2020-12-22 09:00:06,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 1439 transitions. [2020-12-22 09:00:06,820 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 1439 transitions. Word has length 130 [2020-12-22 09:00:06,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:00:06,820 INFO L481 AbstractCegarLoop]: Abstraction has 960 states and 1439 transitions. [2020-12-22 09:00:06,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:00:06,821 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 1439 transitions. [2020-12-22 09:00:06,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 09:00:06,823 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:00:06,823 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] [2020-12-22 09:00:06,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:00:06,824 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:00:06,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:00:06,824 INFO L82 PathProgramCache]: Analyzing trace with hash 892894443, now seen corresponding path program 1 times [2020-12-22 09:00:06,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:00:06,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699196357] [2020-12-22 09:00:06,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:00:06,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:00:07,000 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 09:00:07,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699196357] [2020-12-22 09:00:07,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:00:07,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:00:07,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505611941] [2020-12-22 09:00:07,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:00:07,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:00:07,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:00:07,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:00:07,004 INFO L87 Difference]: Start difference. First operand 960 states and 1439 transitions. Second operand 6 states. [2020-12-22 09:00:07,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:00:07,460 INFO L93 Difference]: Finished difference Result 2630 states and 4016 transitions. [2020-12-22 09:00:07,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:00:07,460 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 131 [2020-12-22 09:00:07,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:00:07,470 INFO L225 Difference]: With dead ends: 2630 [2020-12-22 09:00:07,470 INFO L226 Difference]: Without dead ends: 1750 [2020-12-22 09:00:07,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:00:07,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1750 states. [2020-12-22 09:00:07,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1750 to 1748. [2020-12-22 09:00:07,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1748 states. [2020-12-22 09:00:07,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1748 states to 1748 states and 2650 transitions. [2020-12-22 09:00:07,616 INFO L78 Accepts]: Start accepts. Automaton has 1748 states and 2650 transitions. Word has length 131 [2020-12-22 09:00:07,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:00:07,617 INFO L481 AbstractCegarLoop]: Abstraction has 1748 states and 2650 transitions. [2020-12-22 09:00:07,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:00:07,617 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states and 2650 transitions. [2020-12-22 09:00:07,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 09:00:07,620 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:00:07,620 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] [2020-12-22 09:00:07,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:00:07,621 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:00:07,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:00:07,621 INFO L82 PathProgramCache]: Analyzing trace with hash -726490669, now seen corresponding path program 1 times [2020-12-22 09:00:07,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:00:07,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130085148] [2020-12-22 09:00:07,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:00:07,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:00:07,791 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 09:00:07,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130085148] [2020-12-22 09:00:07,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:00:07,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:00:07,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125001935] [2020-12-22 09:00:07,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:00:07,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:00:07,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:00:07,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:00:07,794 INFO L87 Difference]: Start difference. First operand 1748 states and 2650 transitions. Second operand 6 states. [2020-12-22 09:00:08,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:00:08,326 INFO L93 Difference]: Finished difference Result 4774 states and 7302 transitions. [2020-12-22 09:00:08,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:00:08,327 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 132 [2020-12-22 09:00:08,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:00:08,345 INFO L225 Difference]: With dead ends: 4774 [2020-12-22 09:00:08,345 INFO L226 Difference]: Without dead ends: 3118 [2020-12-22 09:00:08,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:00:08,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3118 states. [2020-12-22 09:00:08,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3118 to 3116. [2020-12-22 09:00:08,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3116 states. [2020-12-22 09:00:08,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3116 states to 3116 states and 4729 transitions. [2020-12-22 09:00:08,618 INFO L78 Accepts]: Start accepts. Automaton has 3116 states and 4729 transitions. Word has length 132 [2020-12-22 09:00:08,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:00:08,618 INFO L481 AbstractCegarLoop]: Abstraction has 3116 states and 4729 transitions. [2020-12-22 09:00:08,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:00:08,619 INFO L276 IsEmpty]: Start isEmpty. Operand 3116 states and 4729 transitions. [2020-12-22 09:00:08,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-12-22 09:00:08,622 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:00:08,623 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] [2020-12-22 09:00:08,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:00:08,623 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:00:08,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:00:08,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1066895247, now seen corresponding path program 1 times [2020-12-22 09:00:08,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:00:08,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926076001] [2020-12-22 09:00:08,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:00:08,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:00:08,755 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 09:00:08,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926076001] [2020-12-22 09:00:08,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:00:08,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:00:08,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730006582] [2020-12-22 09:00:08,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:00:08,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:00:08,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:00:08,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:00:08,759 INFO L87 Difference]: Start difference. First operand 3116 states and 4729 transitions. Second operand 5 states. [2020-12-22 09:00:09,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:00:09,451 INFO L93 Difference]: Finished difference Result 6156 states and 9380 transitions. [2020-12-22 09:00:09,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:00:09,452 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 133 [2020-12-22 09:00:09,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:00:09,473 INFO L225 Difference]: With dead ends: 6156 [2020-12-22 09:00:09,474 INFO L226 Difference]: Without dead ends: 3116 [2020-12-22 09:00:09,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:00:09,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3116 states. [2020-12-22 09:00:09,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3116 to 3116. [2020-12-22 09:00:09,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3116 states. [2020-12-22 09:00:09,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3116 states to 3116 states and 4696 transitions. [2020-12-22 09:00:09,801 INFO L78 Accepts]: Start accepts. Automaton has 3116 states and 4696 transitions. Word has length 133 [2020-12-22 09:00:09,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:00:09,802 INFO L481 AbstractCegarLoop]: Abstraction has 3116 states and 4696 transitions. [2020-12-22 09:00:09,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:00:09,802 INFO L276 IsEmpty]: Start isEmpty. Operand 3116 states and 4696 transitions. [2020-12-22 09:00:09,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 09:00:09,805 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:00:09,805 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] [2020-12-22 09:00:09,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:00:09,806 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:00:09,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:00:09,807 INFO L82 PathProgramCache]: Analyzing trace with hash 223230595, now seen corresponding path program 1 times [2020-12-22 09:00:09,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:00:09,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373641164] [2020-12-22 09:00:09,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:00:09,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:00:09,944 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 09:00:09,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373641164] [2020-12-22 09:00:09,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:00:09,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:00:09,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425878439] [2020-12-22 09:00:09,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:00:09,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:00:09,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:00:09,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:00:09,947 INFO L87 Difference]: Start difference. First operand 3116 states and 4696 transitions. Second operand 5 states. [2020-12-22 09:00:10,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:00:10,423 INFO L93 Difference]: Finished difference Result 6160 states and 9319 transitions. [2020-12-22 09:00:10,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:00:10,424 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 134 [2020-12-22 09:00:10,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:00:10,442 INFO L225 Difference]: With dead ends: 6160 [2020-12-22 09:00:10,442 INFO L226 Difference]: Without dead ends: 3116 [2020-12-22 09:00:10,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:00:10,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3116 states. [2020-12-22 09:00:10,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3116 to 3116. [2020-12-22 09:00:10,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3116 states. [2020-12-22 09:00:10,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3116 states to 3116 states and 4663 transitions. [2020-12-22 09:00:10,732 INFO L78 Accepts]: Start accepts. Automaton has 3116 states and 4663 transitions. Word has length 134 [2020-12-22 09:00:10,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:00:10,732 INFO L481 AbstractCegarLoop]: Abstraction has 3116 states and 4663 transitions. [2020-12-22 09:00:10,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:00:10,732 INFO L276 IsEmpty]: Start isEmpty. Operand 3116 states and 4663 transitions. [2020-12-22 09:00:10,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 09:00:10,735 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:00:10,736 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:00:10,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:00:10,736 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:00:10,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:00:10,737 INFO L82 PathProgramCache]: Analyzing trace with hash 504223899, now seen corresponding path program 1 times [2020-12-22 09:00:10,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:00:10,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394875047] [2020-12-22 09:00:10,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:00:10,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:00:11,041 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 09:00:11,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394875047] [2020-12-22 09:00:11,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:00:11,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 09:00:11,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144018425] [2020-12-22 09:00:11,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 09:00:11,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:00:11,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 09:00:11,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:00:11,045 INFO L87 Difference]: Start difference. First operand 3116 states and 4663 transitions. Second operand 10 states. [2020-12-22 09:00:13,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:00:13,904 INFO L93 Difference]: Finished difference Result 26482 states and 39960 transitions. [2020-12-22 09:00:13,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 09:00:13,905 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 135 [2020-12-22 09:00:13,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:00:13,993 INFO L225 Difference]: With dead ends: 26482 [2020-12-22 09:00:13,994 INFO L226 Difference]: Without dead ends: 23760 [2020-12-22 09:00:14,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:00:14,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23760 states. [2020-12-22 09:00:14,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23760 to 4503. [2020-12-22 09:00:14,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4503 states. [2020-12-22 09:00:14,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4503 states to 4503 states and 6767 transitions. [2020-12-22 09:00:14,882 INFO L78 Accepts]: Start accepts. Automaton has 4503 states and 6767 transitions. Word has length 135 [2020-12-22 09:00:14,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:00:14,882 INFO L481 AbstractCegarLoop]: Abstraction has 4503 states and 6767 transitions. [2020-12-22 09:00:14,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 09:00:14,882 INFO L276 IsEmpty]: Start isEmpty. Operand 4503 states and 6767 transitions. [2020-12-22 09:00:14,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 09:00:14,886 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:00:14,886 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] [2020-12-22 09:00:14,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:00:14,887 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:00:14,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:00:14,888 INFO L82 PathProgramCache]: Analyzing trace with hash -806492665, now seen corresponding path program 1 times [2020-12-22 09:00:14,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:00:14,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791204475] [2020-12-22 09:00:14,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:00:14,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:00:15,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:00:15,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791204475] [2020-12-22 09:00:15,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:00:15,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 09:00:15,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986993092] [2020-12-22 09:00:15,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 09:00:15,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:00:15,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 09:00:15,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:00:15,300 INFO L87 Difference]: Start difference. First operand 4503 states and 6767 transitions. Second operand 10 states. [2020-12-22 09:00:18,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:00:18,926 INFO L93 Difference]: Finished difference Result 27622 states and 41696 transitions. [2020-12-22 09:00:18,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 09:00:18,926 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 135 [2020-12-22 09:00:18,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:00:18,984 INFO L225 Difference]: With dead ends: 27622 [2020-12-22 09:00:18,984 INFO L226 Difference]: Without dead ends: 24900 [2020-12-22 09:00:18,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:00:19,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24900 states. [2020-12-22 09:00:20,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24900 to 7486. [2020-12-22 09:00:20,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7486 states. [2020-12-22 09:00:20,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7486 states to 7486 states and 11295 transitions. [2020-12-22 09:00:20,112 INFO L78 Accepts]: Start accepts. Automaton has 7486 states and 11295 transitions. Word has length 135 [2020-12-22 09:00:20,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:00:20,112 INFO L481 AbstractCegarLoop]: Abstraction has 7486 states and 11295 transitions. [2020-12-22 09:00:20,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 09:00:20,113 INFO L276 IsEmpty]: Start isEmpty. Operand 7486 states and 11295 transitions. [2020-12-22 09:00:20,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 09:00:20,117 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:00:20,117 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] [2020-12-22 09:00:20,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:00:20,118 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:00:20,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:00:20,118 INFO L82 PathProgramCache]: Analyzing trace with hash -502003157, now seen corresponding path program 1 times [2020-12-22 09:00:20,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:00:20,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178311137] [2020-12-22 09:00:20,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:00:20,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:00:20,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:00:20,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178311137] [2020-12-22 09:00:20,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:00:20,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 09:00:20,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700556871] [2020-12-22 09:00:20,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 09:00:20,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:00:20,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 09:00:20,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:00:20,413 INFO L87 Difference]: Start difference. First operand 7486 states and 11295 transitions. Second operand 10 states. [2020-12-22 09:00:24,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:00:24,422 INFO L93 Difference]: Finished difference Result 28946 states and 43702 transitions. [2020-12-22 09:00:24,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 09:00:24,422 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 135 [2020-12-22 09:00:24,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:00:24,478 INFO L225 Difference]: With dead ends: 28946 [2020-12-22 09:00:24,478 INFO L226 Difference]: Without dead ends: 26224 [2020-12-22 09:00:24,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:00:24,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26224 states. [2020-12-22 09:00:25,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26224 to 8936. [2020-12-22 09:00:25,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8936 states. [2020-12-22 09:00:25,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8936 states to 8936 states and 13495 transitions. [2020-12-22 09:00:25,987 INFO L78 Accepts]: Start accepts. Automaton has 8936 states and 13495 transitions. Word has length 135 [2020-12-22 09:00:25,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:00:25,987 INFO L481 AbstractCegarLoop]: Abstraction has 8936 states and 13495 transitions. [2020-12-22 09:00:25,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 09:00:25,987 INFO L276 IsEmpty]: Start isEmpty. Operand 8936 states and 13495 transitions. [2020-12-22 09:00:25,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 09:00:25,994 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:00:25,994 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] [2020-12-22 09:00:25,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:00:25,994 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:00:25,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:00:25,995 INFO L82 PathProgramCache]: Analyzing trace with hash 849835743, now seen corresponding path program 1 times [2020-12-22 09:00:25,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:00:25,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665748275] [2020-12-22 09:00:25,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:00:26,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:00:26,293 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 09:00:26,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665748275] [2020-12-22 09:00:26,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:00:26,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 09:00:26,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450721918] [2020-12-22 09:00:26,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 09:00:26,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:00:26,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 09:00:26,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:00:26,297 INFO L87 Difference]: Start difference. First operand 8936 states and 13495 transitions. Second operand 10 states. [2020-12-22 09:00:30,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:00:30,657 INFO L93 Difference]: Finished difference Result 29900 states and 45148 transitions. [2020-12-22 09:00:30,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 09:00:30,657 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 135 [2020-12-22 09:00:30,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:00:30,721 INFO L225 Difference]: With dead ends: 29900 [2020-12-22 09:00:30,721 INFO L226 Difference]: Without dead ends: 27178 [2020-12-22 09:00:30,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:00:30,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27178 states. [2020-12-22 09:00:32,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27178 to 10336. [2020-12-22 09:00:32,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10336 states. [2020-12-22 09:00:32,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10336 states to 10336 states and 15615 transitions. [2020-12-22 09:00:32,740 INFO L78 Accepts]: Start accepts. Automaton has 10336 states and 15615 transitions. Word has length 135 [2020-12-22 09:00:32,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:00:32,740 INFO L481 AbstractCegarLoop]: Abstraction has 10336 states and 15615 transitions. [2020-12-22 09:00:32,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 09:00:32,740 INFO L276 IsEmpty]: Start isEmpty. Operand 10336 states and 15615 transitions. [2020-12-22 09:00:32,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 09:00:32,745 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:00:32,745 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] [2020-12-22 09:00:32,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:00:32,746 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:00:32,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:00:32,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1630880347, now seen corresponding path program 1 times [2020-12-22 09:00:32,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:00:32,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143701772] [2020-12-22 09:00:32,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:00:32,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:00:32,991 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 09:00:32,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143701772] [2020-12-22 09:00:32,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:00:32,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 09:00:32,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574605494] [2020-12-22 09:00:32,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 09:00:32,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:00:32,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 09:00:32,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:00:32,993 INFO L87 Difference]: Start difference. First operand 10336 states and 15615 transitions. Second operand 10 states. [2020-12-22 09:00:38,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:00:38,186 INFO L93 Difference]: Finished difference Result 31116 states and 47004 transitions. [2020-12-22 09:00:38,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 09:00:38,187 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 135 [2020-12-22 09:00:38,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:00:38,238 INFO L225 Difference]: With dead ends: 31116 [2020-12-22 09:00:38,239 INFO L226 Difference]: Without dead ends: 28394 [2020-12-22 09:00:38,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:00:38,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28394 states. [2020-12-22 09:00:40,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28394 to 11728. [2020-12-22 09:00:40,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11728 states. [2020-12-22 09:00:40,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11728 states to 11728 states and 17727 transitions. [2020-12-22 09:00:40,259 INFO L78 Accepts]: Start accepts. Automaton has 11728 states and 17727 transitions. Word has length 135 [2020-12-22 09:00:40,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:00:40,260 INFO L481 AbstractCegarLoop]: Abstraction has 11728 states and 17727 transitions. [2020-12-22 09:00:40,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 09:00:40,260 INFO L276 IsEmpty]: Start isEmpty. Operand 11728 states and 17727 transitions. [2020-12-22 09:00:40,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 09:00:40,264 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:00:40,265 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] [2020-12-22 09:00:40,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:00:40,265 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:00:40,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:00:40,265 INFO L82 PathProgramCache]: Analyzing trace with hash 662491374, now seen corresponding path program 1 times [2020-12-22 09:00:40,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:00:40,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261300580] [2020-12-22 09:00:40,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:00:40,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:00:40,358 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 09:00:40,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261300580] [2020-12-22 09:00:40,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:00:40,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:00:40,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895223119] [2020-12-22 09:00:40,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:00:40,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:00:40,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:00:40,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:00:40,360 INFO L87 Difference]: Start difference. First operand 11728 states and 17727 transitions. Second operand 3 states. [2020-12-22 09:00:43,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:00:43,585 INFO L93 Difference]: Finished difference Result 31156 states and 47185 transitions. [2020-12-22 09:00:43,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:00:43,586 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 135 [2020-12-22 09:00:43,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:00:43,617 INFO L225 Difference]: With dead ends: 31156 [2020-12-22 09:00:43,618 INFO L226 Difference]: Without dead ends: 20082 [2020-12-22 09:00:43,636 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 09:00:43,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20082 states. [2020-12-22 09:00:46,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20082 to 20080. [2020-12-22 09:00:46,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20080 states. [2020-12-22 09:00:46,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20080 states to 20080 states and 30175 transitions. [2020-12-22 09:00:46,976 INFO L78 Accepts]: Start accepts. Automaton has 20080 states and 30175 transitions. Word has length 135 [2020-12-22 09:00:46,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:00:46,976 INFO L481 AbstractCegarLoop]: Abstraction has 20080 states and 30175 transitions. [2020-12-22 09:00:46,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:00:46,976 INFO L276 IsEmpty]: Start isEmpty. Operand 20080 states and 30175 transitions. [2020-12-22 09:00:46,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 09:00:46,982 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:00:46,982 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] [2020-12-22 09:00:46,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:00:46,982 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:00:46,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:00:46,983 INFO L82 PathProgramCache]: Analyzing trace with hash 383141167, now seen corresponding path program 1 times [2020-12-22 09:00:46,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:00:46,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248802872] [2020-12-22 09:00:46,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:00:47,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:00:47,055 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 09:00:47,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248802872] [2020-12-22 09:00:47,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:00:47,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:00:47,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240896497] [2020-12-22 09:00:47,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:00:47,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:00:47,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:00:47,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:00:47,058 INFO L87 Difference]: Start difference. First operand 20080 states and 30175 transitions. Second operand 3 states. [2020-12-22 09:00:53,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:00:53,401 INFO L93 Difference]: Finished difference Result 57524 states and 86273 transitions. [2020-12-22 09:00:53,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:00:53,402 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 135 [2020-12-22 09:00:53,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:00:53,440 INFO L225 Difference]: With dead ends: 57524 [2020-12-22 09:00:53,440 INFO L226 Difference]: Without dead ends: 38098 [2020-12-22 09:00:53,468 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 09:00:53,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38098 states. [2020-12-22 09:01:00,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38098 to 38096. [2020-12-22 09:01:00,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38096 states. [2020-12-22 09:01:00,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38096 states to 38096 states and 56623 transitions. [2020-12-22 09:01:00,280 INFO L78 Accepts]: Start accepts. Automaton has 38096 states and 56623 transitions. Word has length 135 [2020-12-22 09:01:00,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:01:00,284 INFO L481 AbstractCegarLoop]: Abstraction has 38096 states and 56623 transitions. [2020-12-22 09:01:00,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:01:00,285 INFO L276 IsEmpty]: Start isEmpty. Operand 38096 states and 56623 transitions. [2020-12-22 09:01:00,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 09:01:00,291 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:01:00,291 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] [2020-12-22 09:01:00,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:01:00,291 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:01:00,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:01:00,292 INFO L82 PathProgramCache]: Analyzing trace with hash -165541441, now seen corresponding path program 1 times [2020-12-22 09:01:00,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:01:00,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414188640] [2020-12-22 09:01:00,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:00,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:00,646 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 09:01:00,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414188640] [2020-12-22 09:01:00,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:00,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 09:01:00,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864244760] [2020-12-22 09:01:00,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 09:01:00,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:00,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 09:01:00,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:01:00,649 INFO L87 Difference]: Start difference. First operand 38096 states and 56623 transitions. Second operand 10 states. [2020-12-22 09:01:19,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:01:19,105 INFO L93 Difference]: Finished difference Result 100204 states and 149160 transitions. [2020-12-22 09:01:19,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 09:01:19,106 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 135 [2020-12-22 09:01:19,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:01:19,200 INFO L225 Difference]: With dead ends: 100204 [2020-12-22 09:01:19,200 INFO L226 Difference]: Without dead ends: 92250 [2020-12-22 09:01:19,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:01:19,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92250 states. [2020-12-22 09:01:27,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92250 to 43512. [2020-12-22 09:01:27,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43512 states. [2020-12-22 09:01:28,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43512 states to 43512 states and 64671 transitions. [2020-12-22 09:01:28,042 INFO L78 Accepts]: Start accepts. Automaton has 43512 states and 64671 transitions. Word has length 135 [2020-12-22 09:01:28,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:01:28,042 INFO L481 AbstractCegarLoop]: Abstraction has 43512 states and 64671 transitions. [2020-12-22 09:01:28,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 09:01:28,042 INFO L276 IsEmpty]: Start isEmpty. Operand 43512 states and 64671 transitions. [2020-12-22 09:01:28,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 09:01:28,048 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:01:28,049 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] [2020-12-22 09:01:28,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:01:28,049 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:01:28,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:01:28,050 INFO L82 PathProgramCache]: Analyzing trace with hash 2026833267, now seen corresponding path program 1 times [2020-12-22 09:01:28,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:01:28,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742608323] [2020-12-22 09:01:28,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:28,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:28,331 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 09:01:28,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742608323] [2020-12-22 09:01:28,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:28,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 09:01:28,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496586457] [2020-12-22 09:01:28,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 09:01:28,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:28,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 09:01:28,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:01:28,341 INFO L87 Difference]: Start difference. First operand 43512 states and 64671 transitions. Second operand 10 states. [2020-12-22 09:01:50,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:01:50,080 INFO L93 Difference]: Finished difference Result 105912 states and 157648 transitions. [2020-12-22 09:01:50,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 09:01:50,080 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 135 [2020-12-22 09:01:50,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:01:50,188 INFO L225 Difference]: With dead ends: 105912 [2020-12-22 09:01:50,188 INFO L226 Difference]: Without dead ends: 97958 [2020-12-22 09:01:50,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:01:50,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97958 states. [2020-12-22 09:02:00,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97958 to 48920. [2020-12-22 09:02:00,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48920 states. [2020-12-22 09:02:00,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48920 states to 48920 states and 72711 transitions. [2020-12-22 09:02:00,643 INFO L78 Accepts]: Start accepts. Automaton has 48920 states and 72711 transitions. Word has length 135 [2020-12-22 09:02:00,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:02:00,643 INFO L481 AbstractCegarLoop]: Abstraction has 48920 states and 72711 transitions. [2020-12-22 09:02:00,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 09:02:00,643 INFO L276 IsEmpty]: Start isEmpty. Operand 48920 states and 72711 transitions. [2020-12-22 09:02:00,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 09:02:00,649 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:02:00,649 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] [2020-12-22 09:02:00,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:02:00,649 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:02:00,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:02:00,650 INFO L82 PathProgramCache]: Analyzing trace with hash -2030970729, now seen corresponding path program 1 times [2020-12-22 09:02:00,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:02:00,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841546618] [2020-12-22 09:02:00,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:02:00,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:02:00,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:02:00,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841546618] [2020-12-22 09:02:00,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:02:00,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 09:02:00,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643578284] [2020-12-22 09:02:00,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 09:02:00,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:02:00,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 09:02:00,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:02:00,897 INFO L87 Difference]: Start difference. First operand 48920 states and 72711 transitions. Second operand 10 states. [2020-12-22 09:02:26,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:02:26,767 INFO L93 Difference]: Finished difference Result 112326 states and 167216 transitions. [2020-12-22 09:02:26,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 09:02:26,768 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 135 [2020-12-22 09:02:26,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:02:26,894 INFO L225 Difference]: With dead ends: 112326 [2020-12-22 09:02:26,894 INFO L226 Difference]: Without dead ends: 104372 [2020-12-22 09:02:26,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:02:26,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104372 states. [2020-12-22 09:02:39,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104372 to 54411. [2020-12-22 09:02:39,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54411 states. [2020-12-22 09:02:39,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54411 states to 54411 states and 80879 transitions. [2020-12-22 09:02:39,316 INFO L78 Accepts]: Start accepts. Automaton has 54411 states and 80879 transitions. Word has length 135 [2020-12-22 09:02:39,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:02:39,316 INFO L481 AbstractCegarLoop]: Abstraction has 54411 states and 80879 transitions. [2020-12-22 09:02:39,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 09:02:39,316 INFO L276 IsEmpty]: Start isEmpty. Operand 54411 states and 80879 transitions. [2020-12-22 09:02:39,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 09:02:39,323 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:02:39,324 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] [2020-12-22 09:02:39,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:02:39,324 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:02:39,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:02:39,325 INFO L82 PathProgramCache]: Analyzing trace with hash -939512999, now seen corresponding path program 1 times [2020-12-22 09:02:39,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:02:39,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57598456] [2020-12-22 09:02:39,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:02:39,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:02:39,446 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 09:02:39,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57598456] [2020-12-22 09:02:39,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:02:39,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:02:39,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893116840] [2020-12-22 09:02:39,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:02:39,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:02:39,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:02:39,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:02:39,449 INFO L87 Difference]: Start difference. First operand 54411 states and 80879 transitions. Second operand 5 states. [2020-12-22 09:03:01,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:01,551 INFO L93 Difference]: Finished difference Result 93205 states and 138520 transitions. [2020-12-22 09:03:01,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:03:01,552 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 136 [2020-12-22 09:03:01,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:01,659 INFO L225 Difference]: With dead ends: 93205 [2020-12-22 09:03:01,659 INFO L226 Difference]: Without dead ends: 93203 [2020-12-22 09:03:01,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:03:01,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93203 states. [2020-12-22 09:03:15,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93203 to 54699. [2020-12-22 09:03:15,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54699 states. [2020-12-22 09:03:15,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54699 states to 54699 states and 81007 transitions. [2020-12-22 09:03:15,377 INFO L78 Accepts]: Start accepts. Automaton has 54699 states and 81007 transitions. Word has length 136 [2020-12-22 09:03:15,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:15,377 INFO L481 AbstractCegarLoop]: Abstraction has 54699 states and 81007 transitions. [2020-12-22 09:03:15,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:03:15,378 INFO L276 IsEmpty]: Start isEmpty. Operand 54699 states and 81007 transitions. [2020-12-22 09:03:15,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 09:03:15,385 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:15,385 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] [2020-12-22 09:03:15,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 09:03:15,385 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:15,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:15,386 INFO L82 PathProgramCache]: Analyzing trace with hash -738604843, now seen corresponding path program 1 times [2020-12-22 09:03:15,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:15,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262539488] [2020-12-22 09:03:15,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:15,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:15,667 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 09:03:15,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262539488] [2020-12-22 09:03:15,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:15,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 09:03:15,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878949201] [2020-12-22 09:03:15,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 09:03:15,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:15,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 09:03:15,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:03:15,670 INFO L87 Difference]: Start difference. First operand 54699 states and 81007 transitions. Second operand 9 states. [2020-12-22 09:03:44,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:44,112 INFO L93 Difference]: Finished difference Result 162382 states and 240529 transitions. [2020-12-22 09:03:44,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 09:03:44,112 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 136 [2020-12-22 09:03:44,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:44,253 INFO L225 Difference]: With dead ends: 162382 [2020-12-22 09:03:44,253 INFO L226 Difference]: Without dead ends: 108220 [2020-12-22 09:03:44,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:03:44,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108220 states. [2020-12-22 09:03:59,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108220 to 54410. [2020-12-22 09:03:59,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54410 states. [2020-12-22 09:03:59,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54410 states to 54410 states and 80570 transitions. [2020-12-22 09:03:59,282 INFO L78 Accepts]: Start accepts. Automaton has 54410 states and 80570 transitions. Word has length 136 [2020-12-22 09:03:59,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:59,282 INFO L481 AbstractCegarLoop]: Abstraction has 54410 states and 80570 transitions. [2020-12-22 09:03:59,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 09:03:59,282 INFO L276 IsEmpty]: Start isEmpty. Operand 54410 states and 80570 transitions. [2020-12-22 09:03:59,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-12-22 09:03:59,285 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:59,285 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] [2020-12-22 09:03:59,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:03:59,286 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:59,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:59,286 INFO L82 PathProgramCache]: Analyzing trace with hash -845490235, now seen corresponding path program 1 times [2020-12-22 09:03:59,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:59,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274650499] [2020-12-22 09:03:59,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:59,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:59,569 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 09:03:59,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274650499] [2020-12-22 09:03:59,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:59,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 09:03:59,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203331193] [2020-12-22 09:03:59,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 09:03:59,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:59,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 09:03:59,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:03:59,572 INFO L87 Difference]: Start difference. First operand 54410 states and 80570 transitions. Second operand 10 states.