/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/pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:30:04,914 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:30:04,918 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:30:04,976 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:30:04,977 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:30:04,980 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:30:04,984 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:30:04,992 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:30:04,996 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:30:05,003 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:30:05,005 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:30:05,006 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:30:05,007 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:30:05,010 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:30:05,012 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:30:05,014 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:30:05,015 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:30:05,019 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:30:05,025 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:30:05,033 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:30:05,035 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:30:05,037 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:30:05,039 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:30:05,041 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:30:05,052 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:30:05,061 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:30:05,062 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:30:05,063 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:30:05,064 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:30:05,089 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:30:05,090 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:30:05,091 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:30:05,092 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:30:05,092 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:30:05,092 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:30:05,092 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:30:05,092 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:30:05,093 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:30:05,093 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:30:05,093 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:30:05,093 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:30:05,093 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:30:05,094 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:30:05,094 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:30:05,094 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:30:05,094 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:30:05,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:30:05,095 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:30:05,095 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:30:05,095 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:30:05,095 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:30:05,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:30:05,095 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:30:05,096 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:30:05,096 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:30:05,467 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:30:05,497 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:30:05,500 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:30:05,502 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:30:05,507 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:30:05,508 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c [2020-12-22 07:30:05,602 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac893d316/e9c0324cfa084de3875643d1d7781b58/FLAG04535ee55 [2020-12-22 07:30:06,312 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:30:06,313 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c [2020-12-22 07:30:06,331 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac893d316/e9c0324cfa084de3875643d1d7781b58/FLAG04535ee55 [2020-12-22 07:30:06,561 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac893d316/e9c0324cfa084de3875643d1d7781b58 [2020-12-22 07:30:06,578 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:30:06,581 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:30:06,585 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:30:06,586 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:30:06,590 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:30:06,591 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:30:06" (1/1) ... [2020-12-22 07:30:06,593 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e735a15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:30:06, skipping insertion in model container [2020-12-22 07:30:06,594 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:30:06" (1/1) ... [2020-12-22 07:30:06,602 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:30:06,666 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:30:07,015 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/pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c[16977,16990] [2020-12-22 07:30:07,019 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:30:07,033 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:30:07,116 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/pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c[16977,16990] [2020-12-22 07:30:07,118 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:30:07,168 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:30:07,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:30:07 WrapperNode [2020-12-22 07:30:07,169 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:30:07,172 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:30:07,172 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:30:07,172 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:30:07,184 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:30:07" (1/1) ... [2020-12-22 07:30:07,213 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:30:07" (1/1) ... [2020-12-22 07:30:07,267 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:30:07,268 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:30:07,269 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:30:07,269 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:30:07,279 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:30:07" (1/1) ... [2020-12-22 07:30:07,280 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:30:07" (1/1) ... [2020-12-22 07:30:07,284 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:30:07" (1/1) ... [2020-12-22 07:30:07,284 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:30:07" (1/1) ... [2020-12-22 07:30:07,295 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:30:07" (1/1) ... [2020-12-22 07:30:07,305 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:30:07" (1/1) ... [2020-12-22 07:30:07,309 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:30:07" (1/1) ... [2020-12-22 07:30:07,316 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:30:07,317 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:30:07,317 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:30:07,317 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:30:07,318 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:30:07" (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 07:30:07,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:30:07,429 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:30:07,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:30:07,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:30:08,451 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:30:08,453 INFO L299 CfgBuilder]: Removed 25 assume(true) statements. [2020-12-22 07:30:08,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:30:08 BoogieIcfgContainer [2020-12-22 07:30:08,456 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:30:08,464 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:30:08,465 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:30:08,478 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:30:08,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:30:06" (1/3) ... [2020-12-22 07:30:08,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47012f9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:30:08, skipping insertion in model container [2020-12-22 07:30:08,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:30:07" (2/3) ... [2020-12-22 07:30:08,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47012f9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:30:08, skipping insertion in model container [2020-12-22 07:30:08,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:30:08" (3/3) ... [2020-12-22 07:30:08,489 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c [2020-12-22 07:30:08,510 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:30:08,524 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:30:08,564 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:30:08,636 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:30:08,636 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:30:08,636 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:30:08,637 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:30:08,637 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:30:08,637 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:30:08,637 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:30:08,637 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:30:08,663 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states. [2020-12-22 07:30:08,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:30:08,674 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:30:08,681 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] [2020-12-22 07:30:08,681 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:30:08,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:30:08,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1929732074, now seen corresponding path program 1 times [2020-12-22 07:30:08,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:30:08,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573409539] [2020-12-22 07:30:08,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:30:08,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:30:09,008 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 07:30:09,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573409539] [2020-12-22 07:30:09,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:30:09,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:30:09,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214621094] [2020-12-22 07:30:09,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:30:09,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:30:09,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:30:09,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:30:09,039 INFO L87 Difference]: Start difference. First operand 145 states. Second operand 5 states. [2020-12-22 07:30:09,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:30:09,269 INFO L93 Difference]: Finished difference Result 247 states and 408 transitions. [2020-12-22 07:30:09,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:30:09,271 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-12-22 07:30:09,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:30:09,293 INFO L225 Difference]: With dead ends: 247 [2020-12-22 07:30:09,294 INFO L226 Difference]: Without dead ends: 141 [2020-12-22 07:30:09,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:30:09,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-12-22 07:30:09,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2020-12-22 07:30:09,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-12-22 07:30:09,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 198 transitions. [2020-12-22 07:30:09,378 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 198 transitions. Word has length 37 [2020-12-22 07:30:09,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:30:09,379 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 198 transitions. [2020-12-22 07:30:09,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:30:09,379 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 198 transitions. [2020-12-22 07:30:09,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:30:09,391 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:30:09,392 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:30:09,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:30:09,393 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:30:09,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:30:09,436 INFO L82 PathProgramCache]: Analyzing trace with hash -2008203596, now seen corresponding path program 1 times [2020-12-22 07:30:09,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:30:09,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672812243] [2020-12-22 07:30:09,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:30:09,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:30:09,720 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 07:30:09,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672812243] [2020-12-22 07:30:09,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:30:09,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:30:09,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785786318] [2020-12-22 07:30:09,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:30:09,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:30:09,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:30:09,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:30:09,728 INFO L87 Difference]: Start difference. First operand 141 states and 198 transitions. Second operand 3 states. [2020-12-22 07:30:09,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:30:09,765 INFO L93 Difference]: Finished difference Result 317 states and 480 transitions. [2020-12-22 07:30:09,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:30:09,766 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 07:30:09,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:30:09,769 INFO L225 Difference]: With dead ends: 317 [2020-12-22 07:30:09,769 INFO L226 Difference]: Without dead ends: 223 [2020-12-22 07:30:09,770 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 07:30:09,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-12-22 07:30:09,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 221. [2020-12-22 07:30:09,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-12-22 07:30:09,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 327 transitions. [2020-12-22 07:30:09,792 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 327 transitions. Word has length 77 [2020-12-22 07:30:09,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:30:09,793 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 327 transitions. [2020-12-22 07:30:09,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:30:09,793 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 327 transitions. [2020-12-22 07:30:09,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:30:09,794 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:30:09,795 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:30:09,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:30:09,795 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:30:09,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:30:09,796 INFO L82 PathProgramCache]: Analyzing trace with hash 823495780, now seen corresponding path program 1 times [2020-12-22 07:30:09,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:30:09,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159302910] [2020-12-22 07:30:09,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:30:09,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:30:09,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:30:09,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159302910] [2020-12-22 07:30:09,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:30:09,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:30:09,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671713319] [2020-12-22 07:30:09,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:30:09,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:30:09,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:30:09,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:30:09,976 INFO L87 Difference]: Start difference. First operand 221 states and 327 transitions. Second operand 3 states. [2020-12-22 07:30:10,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:30:10,031 INFO L93 Difference]: Finished difference Result 545 states and 847 transitions. [2020-12-22 07:30:10,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:30:10,033 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-22 07:30:10,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:30:10,040 INFO L225 Difference]: With dead ends: 545 [2020-12-22 07:30:10,040 INFO L226 Difference]: Without dead ends: 371 [2020-12-22 07:30:10,044 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 07:30:10,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2020-12-22 07:30:10,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 369. [2020-12-22 07:30:10,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2020-12-22 07:30:10,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 564 transitions. [2020-12-22 07:30:10,079 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 564 transitions. Word has length 78 [2020-12-22 07:30:10,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:30:10,080 INFO L481 AbstractCegarLoop]: Abstraction has 369 states and 564 transitions. [2020-12-22 07:30:10,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:30:10,080 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 564 transitions. [2020-12-22 07:30:10,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 07:30:10,081 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:30:10,082 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:30:10,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:30:10,082 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:30:10,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:30:10,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1276515004, now seen corresponding path program 1 times [2020-12-22 07:30:10,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:30:10,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706854677] [2020-12-22 07:30:10,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:30:10,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:30:10,213 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 07:30:10,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706854677] [2020-12-22 07:30:10,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:30:10,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:30:10,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350562184] [2020-12-22 07:30:10,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:30:10,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:30:10,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:30:10,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:30:10,220 INFO L87 Difference]: Start difference. First operand 369 states and 564 transitions. Second operand 3 states. [2020-12-22 07:30:10,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:30:10,265 INFO L93 Difference]: Finished difference Result 965 states and 1518 transitions. [2020-12-22 07:30:10,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:30:10,266 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 07:30:10,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:30:10,271 INFO L225 Difference]: With dead ends: 965 [2020-12-22 07:30:10,271 INFO L226 Difference]: Without dead ends: 643 [2020-12-22 07:30:10,272 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 07:30:10,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2020-12-22 07:30:10,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 641. [2020-12-22 07:30:10,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 641 states. [2020-12-22 07:30:10,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 996 transitions. [2020-12-22 07:30:10,310 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 996 transitions. Word has length 79 [2020-12-22 07:30:10,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:30:10,310 INFO L481 AbstractCegarLoop]: Abstraction has 641 states and 996 transitions. [2020-12-22 07:30:10,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:30:10,311 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 996 transitions. [2020-12-22 07:30:10,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 07:30:10,312 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:30:10,312 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:30:10,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:30:10,313 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:30:10,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:30:10,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1327982836, now seen corresponding path program 1 times [2020-12-22 07:30:10,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:30:10,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439476600] [2020-12-22 07:30:10,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:30:10,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:30:10,399 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 07:30:10,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439476600] [2020-12-22 07:30:10,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:30:10,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:30:10,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604702528] [2020-12-22 07:30:10,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:30:10,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:30:10,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:30:10,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:30:10,403 INFO L87 Difference]: Start difference. First operand 641 states and 996 transitions. Second operand 3 states. [2020-12-22 07:30:10,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:30:10,480 INFO L93 Difference]: Finished difference Result 1733 states and 2734 transitions. [2020-12-22 07:30:10,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:30:10,481 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 07:30:10,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:30:10,489 INFO L225 Difference]: With dead ends: 1733 [2020-12-22 07:30:10,489 INFO L226 Difference]: Without dead ends: 1139 [2020-12-22 07:30:10,491 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 07:30:10,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2020-12-22 07:30:10,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1137. [2020-12-22 07:30:10,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1137 states. [2020-12-22 07:30:10,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 1776 transitions. [2020-12-22 07:30:10,535 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 1776 transitions. Word has length 80 [2020-12-22 07:30:10,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:30:10,536 INFO L481 AbstractCegarLoop]: Abstraction has 1137 states and 1776 transitions. [2020-12-22 07:30:10,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:30:10,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 1776 transitions. [2020-12-22 07:30:10,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 07:30:10,538 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:30:10,538 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] [2020-12-22 07:30:10,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:30:10,539 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:30:10,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:30:10,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1219881940, now seen corresponding path program 1 times [2020-12-22 07:30:10,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:30:10,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618370296] [2020-12-22 07:30:10,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:30:10,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:30:10,617 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 07:30:10,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618370296] [2020-12-22 07:30:10,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:30:10,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:30:10,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683432119] [2020-12-22 07:30:10,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:30:10,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:30:10,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:30:10,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:30:10,623 INFO L87 Difference]: Start difference. First operand 1137 states and 1776 transitions. Second operand 3 states. [2020-12-22 07:30:10,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:30:10,688 INFO L93 Difference]: Finished difference Result 3125 states and 4914 transitions. [2020-12-22 07:30:10,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:30:10,688 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 07:30:10,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:30:10,701 INFO L225 Difference]: With dead ends: 3125 [2020-12-22 07:30:10,701 INFO L226 Difference]: Without dead ends: 2035 [2020-12-22 07:30:10,704 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 07:30:10,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2020-12-22 07:30:10,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 2033. [2020-12-22 07:30:10,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2033 states. [2020-12-22 07:30:10,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2033 states to 2033 states and 3168 transitions. [2020-12-22 07:30:10,778 INFO L78 Accepts]: Start accepts. Automaton has 2033 states and 3168 transitions. Word has length 81 [2020-12-22 07:30:10,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:30:10,778 INFO L481 AbstractCegarLoop]: Abstraction has 2033 states and 3168 transitions. [2020-12-22 07:30:10,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:30:10,779 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states and 3168 transitions. [2020-12-22 07:30:10,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 07:30:10,779 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:30:10,780 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] [2020-12-22 07:30:10,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:30:10,780 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:30:10,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:30:10,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1035004540, now seen corresponding path program 1 times [2020-12-22 07:30:10,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:30:10,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683458242] [2020-12-22 07:30:10,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:30:10,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:30:10,851 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 07:30:10,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683458242] [2020-12-22 07:30:10,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:30:10,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:30:10,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133603207] [2020-12-22 07:30:10,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:30:10,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:30:10,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:30:10,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:30:10,854 INFO L87 Difference]: Start difference. First operand 2033 states and 3168 transitions. Second operand 3 states. [2020-12-22 07:30:10,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:30:10,994 INFO L93 Difference]: Finished difference Result 5621 states and 8770 transitions. [2020-12-22 07:30:10,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:30:10,995 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 82 [2020-12-22 07:30:10,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:30:11,013 INFO L225 Difference]: With dead ends: 5621 [2020-12-22 07:30:11,014 INFO L226 Difference]: Without dead ends: 3635 [2020-12-22 07:30:11,018 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 07:30:11,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3635 states. [2020-12-22 07:30:11,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3635 to 3633. [2020-12-22 07:30:11,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3633 states. [2020-12-22 07:30:11,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3633 states to 3633 states and 5616 transitions. [2020-12-22 07:30:11,172 INFO L78 Accepts]: Start accepts. Automaton has 3633 states and 5616 transitions. Word has length 82 [2020-12-22 07:30:11,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:30:11,173 INFO L481 AbstractCegarLoop]: Abstraction has 3633 states and 5616 transitions. [2020-12-22 07:30:11,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:30:11,173 INFO L276 IsEmpty]: Start isEmpty. Operand 3633 states and 5616 transitions. [2020-12-22 07:30:11,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:30:11,174 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:30:11,174 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] [2020-12-22 07:30:11,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:30:11,175 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:30:11,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:30:11,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1846622820, now seen corresponding path program 1 times [2020-12-22 07:30:11,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:30:11,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714385444] [2020-12-22 07:30:11,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:30:11,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:30:11,450 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 07:30:11,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714385444] [2020-12-22 07:30:11,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:30:11,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:30:11,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968163914] [2020-12-22 07:30:11,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:30:11,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:30:11,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:30:11,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:30:11,454 INFO L87 Difference]: Start difference. First operand 3633 states and 5616 transitions. Second operand 8 states. [2020-12-22 07:30:12,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:30:12,488 INFO L93 Difference]: Finished difference Result 22653 states and 34710 transitions. [2020-12-22 07:30:12,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:30:12,489 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 83 [2020-12-22 07:30:12,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:30:12,597 INFO L225 Difference]: With dead ends: 22653 [2020-12-22 07:30:12,597 INFO L226 Difference]: Without dead ends: 19067 [2020-12-22 07:30:12,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:30:12,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19067 states. [2020-12-22 07:30:13,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19067 to 19057. [2020-12-22 07:30:13,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19057 states. [2020-12-22 07:30:13,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19057 states to 19057 states and 29072 transitions. [2020-12-22 07:30:13,798 INFO L78 Accepts]: Start accepts. Automaton has 19057 states and 29072 transitions. Word has length 83 [2020-12-22 07:30:13,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:30:13,798 INFO L481 AbstractCegarLoop]: Abstraction has 19057 states and 29072 transitions. [2020-12-22 07:30:13,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:30:13,799 INFO L276 IsEmpty]: Start isEmpty. Operand 19057 states and 29072 transitions. [2020-12-22 07:30:13,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 07:30:13,802 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:30:13,803 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] [2020-12-22 07:30:13,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:30:13,803 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:30:13,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:30:13,804 INFO L82 PathProgramCache]: Analyzing trace with hash -927768561, now seen corresponding path program 1 times [2020-12-22 07:30:13,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:30:13,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70107937] [2020-12-22 07:30:13,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:30:13,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:30:14,019 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 07:30:14,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70107937] [2020-12-22 07:30:14,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:30:14,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:30:14,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619488469] [2020-12-22 07:30:14,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:30:14,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:30:14,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:30:14,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:30:14,022 INFO L87 Difference]: Start difference. First operand 19057 states and 29072 transitions. Second operand 8 states. [2020-12-22 07:30:17,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:30:17,211 INFO L93 Difference]: Finished difference Result 106847 states and 163447 transitions. [2020-12-22 07:30:17,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:30:17,212 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 84 [2020-12-22 07:30:17,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:30:17,480 INFO L225 Difference]: With dead ends: 106847 [2020-12-22 07:30:17,481 INFO L226 Difference]: Without dead ends: 87837 [2020-12-22 07:30:17,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 07:30:17,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87837 states. [2020-12-22 07:30:20,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87837 to 38065. [2020-12-22 07:30:20,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38065 states. [2020-12-22 07:30:20,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38065 states to 38065 states and 57328 transitions. [2020-12-22 07:30:20,675 INFO L78 Accepts]: Start accepts. Automaton has 38065 states and 57328 transitions. Word has length 84 [2020-12-22 07:30:20,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:30:20,675 INFO L481 AbstractCegarLoop]: Abstraction has 38065 states and 57328 transitions. [2020-12-22 07:30:20,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:30:20,675 INFO L276 IsEmpty]: Start isEmpty. Operand 38065 states and 57328 transitions. [2020-12-22 07:30:20,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-22 07:30:20,676 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:30:20,677 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] [2020-12-22 07:30:20,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:30:20,677 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:30:20,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:30:20,678 INFO L82 PathProgramCache]: Analyzing trace with hash 920622579, now seen corresponding path program 1 times [2020-12-22 07:30:20,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:30:20,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346511161] [2020-12-22 07:30:20,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:30:20,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:30:20,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:30:20,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346511161] [2020-12-22 07:30:20,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:30:20,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:30:20,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839577615] [2020-12-22 07:30:20,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:30:20,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:30:20,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:30:20,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:30:20,836 INFO L87 Difference]: Start difference. First operand 38065 states and 57328 transitions. Second operand 8 states. [2020-12-22 07:30:24,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:30:24,207 INFO L93 Difference]: Finished difference Result 79155 states and 117681 transitions. [2020-12-22 07:30:24,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 07:30:24,208 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 85 [2020-12-22 07:30:24,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:30:24,363 INFO L225 Difference]: With dead ends: 79155 [2020-12-22 07:30:24,364 INFO L226 Difference]: Without dead ends: 79153 [2020-12-22 07:30:24,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 07:30:24,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79153 states. [2020-12-22 07:30:26,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79153 to 40369. [2020-12-22 07:30:26,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40369 states. [2020-12-22 07:30:26,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40369 states to 40369 states and 59632 transitions. [2020-12-22 07:30:26,709 INFO L78 Accepts]: Start accepts. Automaton has 40369 states and 59632 transitions. Word has length 85 [2020-12-22 07:30:26,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:30:26,710 INFO L481 AbstractCegarLoop]: Abstraction has 40369 states and 59632 transitions. [2020-12-22 07:30:26,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:30:26,710 INFO L276 IsEmpty]: Start isEmpty. Operand 40369 states and 59632 transitions. [2020-12-22 07:30:26,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 07:30:26,711 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:30:26,711 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] [2020-12-22 07:30:26,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:30:26,712 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:30:26,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:30:26,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1472892313, now seen corresponding path program 1 times [2020-12-22 07:30:26,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:30:26,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381263996] [2020-12-22 07:30:26,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:30:26,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:30:26,780 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 07:30:26,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381263996] [2020-12-22 07:30:26,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:30:26,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:30:26,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689989080] [2020-12-22 07:30:26,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:30:26,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:30:26,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:30:26,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:30:26,783 INFO L87 Difference]: Start difference. First operand 40369 states and 59632 transitions. Second operand 3 states. [2020-12-22 07:30:29,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:30:29,101 INFO L93 Difference]: Finished difference Result 98711 states and 145940 transitions. [2020-12-22 07:30:29,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:30:29,103 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2020-12-22 07:30:29,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:30:29,205 INFO L225 Difference]: With dead ends: 98711 [2020-12-22 07:30:29,205 INFO L226 Difference]: Without dead ends: 58389 [2020-12-22 07:30:29,255 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 07:30:29,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58389 states. [2020-12-22 07:30:32,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58389 to 58387. [2020-12-22 07:30:32,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58387 states. [2020-12-22 07:30:32,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58387 states to 58387 states and 86002 transitions. [2020-12-22 07:30:32,309 INFO L78 Accepts]: Start accepts. Automaton has 58387 states and 86002 transitions. Word has length 86 [2020-12-22 07:30:32,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:30:32,309 INFO L481 AbstractCegarLoop]: Abstraction has 58387 states and 86002 transitions. [2020-12-22 07:30:32,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:30:32,310 INFO L276 IsEmpty]: Start isEmpty. Operand 58387 states and 86002 transitions. [2020-12-22 07:30:32,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-22 07:30:32,346 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:30:32,346 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:30:32,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:30:32,347 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:30:32,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:30:32,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1072838691, now seen corresponding path program 1 times [2020-12-22 07:30:32,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:30:32,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626415771] [2020-12-22 07:30:32,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:30:32,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:30:32,724 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:30:32,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626415771] [2020-12-22 07:30:32,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790114070] [2020-12-22 07:30:32,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:30:32,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:30:32,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 07:30:32,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:30:33,195 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:30:33,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:30:33,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2020-12-22 07:30:33,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498161996] [2020-12-22 07:30:33,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:30:33,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:30:33,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:30:33,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:30:33,198 INFO L87 Difference]: Start difference. First operand 58387 states and 86002 transitions. Second operand 7 states. [2020-12-22 07:30:37,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:30:37,892 INFO L93 Difference]: Finished difference Result 144430 states and 213468 transitions. [2020-12-22 07:30:37,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:30:37,893 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 117 [2020-12-22 07:30:37,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:30:38,165 INFO L225 Difference]: With dead ends: 144430 [2020-12-22 07:30:38,165 INFO L226 Difference]: Without dead ends: 104108 [2020-12-22 07:30:38,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:30:38,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104108 states. [2020-12-22 07:30:43,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104108 to 96659. [2020-12-22 07:30:43,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96659 states. [2020-12-22 07:30:43,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96659 states to 96659 states and 141874 transitions. [2020-12-22 07:30:43,407 INFO L78 Accepts]: Start accepts. Automaton has 96659 states and 141874 transitions. Word has length 117 [2020-12-22 07:30:43,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:30:43,408 INFO L481 AbstractCegarLoop]: Abstraction has 96659 states and 141874 transitions. [2020-12-22 07:30:43,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:30:43,408 INFO L276 IsEmpty]: Start isEmpty. Operand 96659 states and 141874 transitions. [2020-12-22 07:30:43,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-22 07:30:43,453 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:30:43,454 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:30:43,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 07:30:43,668 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:30:43,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:30:43,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1628565047, now seen corresponding path program 1 times [2020-12-22 07:30:43,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:30:43,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149256847] [2020-12-22 07:30:43,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:30:43,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:30:43,743 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:30:43,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149256847] [2020-12-22 07:30:43,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:30:43,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:30:43,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777327679] [2020-12-22 07:30:43,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:30:43,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:30:43,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:30:43,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:30:43,745 INFO L87 Difference]: Start difference. First operand 96659 states and 141874 transitions. Second operand 3 states. [2020-12-22 07:30:50,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:30:50,971 INFO L93 Difference]: Finished difference Result 257623 states and 377716 transitions. [2020-12-22 07:30:50,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:30:50,971 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 118 [2020-12-22 07:30:50,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:30:51,428 INFO L225 Difference]: With dead ends: 257623 [2020-12-22 07:30:51,429 INFO L226 Difference]: Without dead ends: 174101 [2020-12-22 07:30:51,560 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 07:30:51,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174101 states. [2020-12-22 07:31:00,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174101 to 174099. [2020-12-22 07:31:00,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174099 states. [2020-12-22 07:31:00,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174099 states to 174099 states and 253074 transitions. [2020-12-22 07:31:00,576 INFO L78 Accepts]: Start accepts. Automaton has 174099 states and 253074 transitions. Word has length 118 [2020-12-22 07:31:00,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:31:00,577 INFO L481 AbstractCegarLoop]: Abstraction has 174099 states and 253074 transitions. [2020-12-22 07:31:00,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:31:00,577 INFO L276 IsEmpty]: Start isEmpty. Operand 174099 states and 253074 transitions. [2020-12-22 07:31:00,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-22 07:31:00,615 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:31:00,615 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:31:00,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:31:00,615 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:31:00,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:31:00,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1618503993, now seen corresponding path program 1 times [2020-12-22 07:31:00,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:31:00,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594709955] [2020-12-22 07:31:00,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:31:00,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:00,819 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 07:31:00,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594709955] [2020-12-22 07:31:00,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:31:00,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:31:00,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982262606] [2020-12-22 07:31:00,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:31:00,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:31:00,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:31:00,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:31:00,823 INFO L87 Difference]: Start difference. First operand 174099 states and 253074 transitions. Second operand 8 states. [2020-12-22 07:31:17,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:31:17,365 INFO L93 Difference]: Finished difference Result 480433 states and 704057 transitions. [2020-12-22 07:31:17,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:31:17,366 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 118 [2020-12-22 07:31:17,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:31:18,340 INFO L225 Difference]: With dead ends: 480433 [2020-12-22 07:31:18,340 INFO L226 Difference]: Without dead ends: 398511 [2020-12-22 07:31:18,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-12-22 07:31:18,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398511 states. [2020-12-22 07:31:31,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398511 to 248547. [2020-12-22 07:31:31,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248547 states. [2020-12-22 07:31:32,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248547 states to 248547 states and 361170 transitions. [2020-12-22 07:31:32,406 INFO L78 Accepts]: Start accepts. Automaton has 248547 states and 361170 transitions. Word has length 118 [2020-12-22 07:31:32,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:31:32,407 INFO L481 AbstractCegarLoop]: Abstraction has 248547 states and 361170 transitions. [2020-12-22 07:31:32,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:31:32,407 INFO L276 IsEmpty]: Start isEmpty. Operand 248547 states and 361170 transitions. [2020-12-22 07:31:32,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-22 07:31:32,452 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:31:32,452 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:31:32,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:31:32,453 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:31:32,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:31:32,453 INFO L82 PathProgramCache]: Analyzing trace with hash -876083369, now seen corresponding path program 1 times [2020-12-22 07:31:32,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:31:32,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264931510] [2020-12-22 07:31:32,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:31:32,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:32,533 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:31:32,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264931510] [2020-12-22 07:31:32,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:31:32,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:31:32,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491571311] [2020-12-22 07:31:32,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:31:32,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:31:32,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:31:32,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:31:32,538 INFO L87 Difference]: Start difference. First operand 248547 states and 361170 transitions. Second operand 3 states. [2020-12-22 07:31:50,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:31:50,838 INFO L93 Difference]: Finished difference Result 606480 states and 880914 transitions. [2020-12-22 07:31:50,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:31:50,842 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 118 [2020-12-22 07:31:50,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:31:51,818 INFO L225 Difference]: With dead ends: 606480 [2020-12-22 07:31:51,818 INFO L226 Difference]: Without dead ends: 410638 [2020-12-22 07:31:52,039 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 07:31:52,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410638 states.