/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_floodmax.4.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:23:15,482 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:23:15,485 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:23:15,520 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:23:15,521 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:23:15,522 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:23:15,524 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:23:15,526 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:23:15,528 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:23:15,529 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:23:15,530 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:23:15,532 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:23:15,532 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:23:15,533 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:23:15,535 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:23:15,536 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:23:15,537 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:23:15,538 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:23:15,548 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:23:15,551 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:23:15,553 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:23:15,555 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:23:15,556 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:23:15,557 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:23:15,560 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:23:15,572 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:23:15,573 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:23:15,574 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:23:15,575 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:23:15,632 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:23:15,633 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:23:15,634 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:23:15,634 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:23:15,635 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:23:15,637 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:23:15,637 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:23:15,638 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:23:15,638 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:23:15,638 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:23:15,638 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:23:15,639 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:23:15,639 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:23:15,639 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:23:15,640 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:23:15,640 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:23:15,643 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:23:15,643 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:23:15,643 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:23:15,644 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:23:15,644 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:23:15,644 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:23:15,644 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:23:15,645 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:23:15,646 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:23:15,646 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:23:16,026 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:23:16,053 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:23:16,056 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:23:16,058 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:23:16,058 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:23:16,059 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.ufo.UNBOUNDED.pals.c [2020-12-22 07:23:16,139 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbec252a8/c1d47443d3a5417892b542c906d83f12/FLAG6f8be9deb [2020-12-22 07:23:16,843 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:23:16,844 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.ufo.UNBOUNDED.pals.c [2020-12-22 07:23:16,870 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbec252a8/c1d47443d3a5417892b542c906d83f12/FLAG6f8be9deb [2020-12-22 07:23:17,091 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbec252a8/c1d47443d3a5417892b542c906d83f12 [2020-12-22 07:23:17,095 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:23:17,098 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:23:17,101 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:23:17,101 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:23:17,105 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:23:17,106 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:23:17" (1/1) ... [2020-12-22 07:23:17,108 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a82303d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:23:17, skipping insertion in model container [2020-12-22 07:23:17,108 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:23:17" (1/1) ... [2020-12-22 07:23:17,120 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:23:17,191 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:23:17,581 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_floodmax.4.ufo.UNBOUNDED.pals.c[28366,28379] [2020-12-22 07:23:17,585 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:23:17,597 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:23:17,688 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_floodmax.4.ufo.UNBOUNDED.pals.c[28366,28379] [2020-12-22 07:23:17,689 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:23:17,713 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:23:17,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:23:17 WrapperNode [2020-12-22 07:23:17,714 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:23:17,715 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:23:17,716 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:23:17,716 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:23:17,726 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:23:17" (1/1) ... [2020-12-22 07:23:17,744 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:23:17" (1/1) ... [2020-12-22 07:23:17,857 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:23:17,858 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:23:17,858 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:23:17,859 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:23:17,876 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:23:17" (1/1) ... [2020-12-22 07:23:17,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:23:17" (1/1) ... [2020-12-22 07:23:17,888 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:23:17" (1/1) ... [2020-12-22 07:23:17,889 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:23:17" (1/1) ... [2020-12-22 07:23:17,935 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:23:17" (1/1) ... [2020-12-22 07:23:17,962 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:23:17" (1/1) ... [2020-12-22 07:23:17,971 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:23:17" (1/1) ... [2020-12-22 07:23:17,982 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:23:17,983 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:23:17,983 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:23:17,984 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:23:17,986 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:23:17" (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 07:23:18,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:23:18,096 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:23:18,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:23:18,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:23:19,350 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:23:19,351 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2020-12-22 07:23:19,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:23:19 BoogieIcfgContainer [2020-12-22 07:23:19,353 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:23:19,355 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:23:19,355 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:23:19,359 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:23:19,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:23:17" (1/3) ... [2020-12-22 07:23:19,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2172780a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:23:19, skipping insertion in model container [2020-12-22 07:23:19,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:23:17" (2/3) ... [2020-12-22 07:23:19,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2172780a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:23:19, skipping insertion in model container [2020-12-22 07:23:19,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:23:19" (3/3) ... [2020-12-22 07:23:19,363 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.ufo.UNBOUNDED.pals.c [2020-12-22 07:23:19,369 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:23:19,375 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:23:19,401 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:23:19,433 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:23:19,433 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:23:19,433 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:23:19,434 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:23:19,434 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:23:19,434 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:23:19,434 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:23:19,434 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:23:19,458 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2020-12-22 07:23:19,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:23:19,473 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:23:19,474 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 07:23:19,475 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:23:19,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:23:19,481 INFO L82 PathProgramCache]: Analyzing trace with hash 883240596, now seen corresponding path program 1 times [2020-12-22 07:23:19,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:23:19,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065853104] [2020-12-22 07:23:19,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:23:19,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:23:19,859 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 07:23:19,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065853104] [2020-12-22 07:23:19,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:23:19,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:23:19,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91382822] [2020-12-22 07:23:19,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:23:19,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:23:19,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:23:19,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:23:19,884 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 2 states. [2020-12-22 07:23:19,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:23:19,933 INFO L93 Difference]: Finished difference Result 427 states and 757 transitions. [2020-12-22 07:23:19,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:23:19,937 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 77 [2020-12-22 07:23:19,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:23:19,955 INFO L225 Difference]: With dead ends: 427 [2020-12-22 07:23:19,955 INFO L226 Difference]: Without dead ends: 307 [2020-12-22 07:23:19,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:23:19,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-12-22 07:23:20,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2020-12-22 07:23:20,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-12-22 07:23:20,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 550 transitions. [2020-12-22 07:23:20,046 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 550 transitions. Word has length 77 [2020-12-22 07:23:20,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:23:20,047 INFO L481 AbstractCegarLoop]: Abstraction has 307 states and 550 transitions. [2020-12-22 07:23:20,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:23:20,052 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 550 transitions. [2020-12-22 07:23:20,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:23:20,061 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:23:20,061 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 07:23:20,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:23:20,062 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:23:20,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:23:20,065 INFO L82 PathProgramCache]: Analyzing trace with hash 749227090, now seen corresponding path program 1 times [2020-12-22 07:23:20,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:23:20,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605463079] [2020-12-22 07:23:20,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:23:20,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:23:20,345 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 07:23:20,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605463079] [2020-12-22 07:23:20,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:23:20,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:23:20,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460254404] [2020-12-22 07:23:20,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:23:20,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:23:20,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:23:20,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:23:20,351 INFO L87 Difference]: Start difference. First operand 307 states and 550 transitions. Second operand 5 states. [2020-12-22 07:23:20,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:23:20,483 INFO L93 Difference]: Finished difference Result 426 states and 750 transitions. [2020-12-22 07:23:20,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:23:20,483 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 77 [2020-12-22 07:23:20,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:23:20,487 INFO L225 Difference]: With dead ends: 426 [2020-12-22 07:23:20,487 INFO L226 Difference]: Without dead ends: 307 [2020-12-22 07:23:20,489 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 07:23:20,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-12-22 07:23:20,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2020-12-22 07:23:20,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-12-22 07:23:20,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 508 transitions. [2020-12-22 07:23:20,517 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 508 transitions. Word has length 77 [2020-12-22 07:23:20,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:23:20,517 INFO L481 AbstractCegarLoop]: Abstraction has 307 states and 508 transitions. [2020-12-22 07:23:20,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:23:20,518 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 508 transitions. [2020-12-22 07:23:20,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-22 07:23:20,529 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:23:20,530 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] [2020-12-22 07:23:20,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:23:20,530 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:23:20,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:23:20,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1045938854, now seen corresponding path program 1 times [2020-12-22 07:23:20,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:23:20,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818954753] [2020-12-22 07:23:20,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:23:20,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:23:20,790 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 07:23:20,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818954753] [2020-12-22 07:23:20,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:23:20,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:23:20,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538306009] [2020-12-22 07:23:20,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:23:20,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:23:20,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:23:20,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:23:20,797 INFO L87 Difference]: Start difference. First operand 307 states and 508 transitions. Second operand 3 states. [2020-12-22 07:23:20,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:23:20,884 INFO L93 Difference]: Finished difference Result 526 states and 879 transitions. [2020-12-22 07:23:20,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:23:20,885 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 118 [2020-12-22 07:23:20,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:23:20,889 INFO L225 Difference]: With dead ends: 526 [2020-12-22 07:23:20,889 INFO L226 Difference]: Without dead ends: 411 [2020-12-22 07:23:20,890 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 07:23:20,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-12-22 07:23:20,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 408. [2020-12-22 07:23:20,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2020-12-22 07:23:20,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 675 transitions. [2020-12-22 07:23:20,929 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 675 transitions. Word has length 118 [2020-12-22 07:23:20,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:23:20,930 INFO L481 AbstractCegarLoop]: Abstraction has 408 states and 675 transitions. [2020-12-22 07:23:20,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:23:20,930 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 675 transitions. [2020-12-22 07:23:20,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-22 07:23:20,935 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:23:20,935 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] [2020-12-22 07:23:20,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:23:20,937 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:23:20,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:23:20,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1919052267, now seen corresponding path program 1 times [2020-12-22 07:23:20,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:23:20,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037253393] [2020-12-22 07:23:20,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:23:21,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:23:21,108 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 07:23:21,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037253393] [2020-12-22 07:23:21,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:23:21,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:23:21,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538924945] [2020-12-22 07:23:21,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:23:21,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:23:21,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:23:21,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:23:21,120 INFO L87 Difference]: Start difference. First operand 408 states and 675 transitions. Second operand 3 states. [2020-12-22 07:23:21,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:23:21,171 INFO L93 Difference]: Finished difference Result 822 states and 1367 transitions. [2020-12-22 07:23:21,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:23:21,172 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2020-12-22 07:23:21,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:23:21,178 INFO L225 Difference]: With dead ends: 822 [2020-12-22 07:23:21,178 INFO L226 Difference]: Without dead ends: 606 [2020-12-22 07:23:21,184 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 07:23:21,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2020-12-22 07:23:21,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 602. [2020-12-22 07:23:21,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 602 states. [2020-12-22 07:23:21,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 997 transitions. [2020-12-22 07:23:21,229 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 997 transitions. Word has length 121 [2020-12-22 07:23:21,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:23:21,231 INFO L481 AbstractCegarLoop]: Abstraction has 602 states and 997 transitions. [2020-12-22 07:23:21,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:23:21,231 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 997 transitions. [2020-12-22 07:23:21,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 07:23:21,234 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:23:21,234 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] [2020-12-22 07:23:21,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:23:21,234 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:23:21,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:23:21,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1777448074, now seen corresponding path program 1 times [2020-12-22 07:23:21,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:23:21,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989084172] [2020-12-22 07:23:21,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:23:21,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:23:21,414 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 07:23:21,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989084172] [2020-12-22 07:23:21,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:23:21,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:23:21,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331451107] [2020-12-22 07:23:21,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:23:21,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:23:21,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:23:21,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:23:21,417 INFO L87 Difference]: Start difference. First operand 602 states and 997 transitions. Second operand 3 states. [2020-12-22 07:23:21,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:23:21,469 INFO L93 Difference]: Finished difference Result 1386 states and 2299 transitions. [2020-12-22 07:23:21,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:23:21,469 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 124 [2020-12-22 07:23:21,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:23:21,475 INFO L225 Difference]: With dead ends: 1386 [2020-12-22 07:23:21,475 INFO L226 Difference]: Without dead ends: 976 [2020-12-22 07:23:21,477 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 07:23:21,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2020-12-22 07:23:21,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 970. [2020-12-22 07:23:21,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 970 states. [2020-12-22 07:23:21,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 1601 transitions. [2020-12-22 07:23:21,511 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 1601 transitions. Word has length 124 [2020-12-22 07:23:21,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:23:21,512 INFO L481 AbstractCegarLoop]: Abstraction has 970 states and 1601 transitions. [2020-12-22 07:23:21,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:23:21,512 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 1601 transitions. [2020-12-22 07:23:21,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:23:21,514 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:23:21,515 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 07:23:21,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:23:21,515 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:23:21,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:23:21,516 INFO L82 PathProgramCache]: Analyzing trace with hash 78545669, now seen corresponding path program 1 times [2020-12-22 07:23:21,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:23:21,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286176512] [2020-12-22 07:23:21,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:23:21,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:23:21,659 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 07:23:21,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286176512] [2020-12-22 07:23:21,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:23:21,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:23:21,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817715338] [2020-12-22 07:23:21,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:23:21,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:23:21,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:23:21,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:23:21,662 INFO L87 Difference]: Start difference. First operand 970 states and 1601 transitions. Second operand 3 states. [2020-12-22 07:23:21,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:23:21,736 INFO L93 Difference]: Finished difference Result 2454 states and 4043 transitions. [2020-12-22 07:23:21,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:23:21,737 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 127 [2020-12-22 07:23:21,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:23:21,751 INFO L225 Difference]: With dead ends: 2454 [2020-12-22 07:23:21,752 INFO L226 Difference]: Without dead ends: 1676 [2020-12-22 07:23:21,754 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 07:23:21,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1676 states. [2020-12-22 07:23:21,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1676 to 1666. [2020-12-22 07:23:21,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1666 states. [2020-12-22 07:23:21,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 2729 transitions. [2020-12-22 07:23:21,834 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 2729 transitions. Word has length 127 [2020-12-22 07:23:21,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:23:21,834 INFO L481 AbstractCegarLoop]: Abstraction has 1666 states and 2729 transitions. [2020-12-22 07:23:21,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:23:21,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 2729 transitions. [2020-12-22 07:23:21,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 07:23:21,837 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:23:21,838 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 07:23:21,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:23:21,838 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:23:21,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:23:21,840 INFO L82 PathProgramCache]: Analyzing trace with hash -579836998, now seen corresponding path program 1 times [2020-12-22 07:23:21,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:23:21,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525902893] [2020-12-22 07:23:21,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:23:21,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:23:22,071 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 07:23:22,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525902893] [2020-12-22 07:23:22,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:23:22,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:23:22,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775224002] [2020-12-22 07:23:22,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:23:22,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:23:22,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:23:22,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:23:22,078 INFO L87 Difference]: Start difference. First operand 1666 states and 2729 transitions. Second operand 6 states. [2020-12-22 07:23:22,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:23:22,570 INFO L93 Difference]: Finished difference Result 8554 states and 14173 transitions. [2020-12-22 07:23:22,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 07:23:22,570 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 130 [2020-12-22 07:23:22,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:23:22,612 INFO L225 Difference]: With dead ends: 8554 [2020-12-22 07:23:22,612 INFO L226 Difference]: Without dead ends: 7080 [2020-12-22 07:23:22,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 07:23:22,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7080 states. [2020-12-22 07:23:22,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7080 to 3039. [2020-12-22 07:23:22,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3039 states. [2020-12-22 07:23:22,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3039 states to 3039 states and 4979 transitions. [2020-12-22 07:23:22,828 INFO L78 Accepts]: Start accepts. Automaton has 3039 states and 4979 transitions. Word has length 130 [2020-12-22 07:23:22,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:23:22,828 INFO L481 AbstractCegarLoop]: Abstraction has 3039 states and 4979 transitions. [2020-12-22 07:23:22,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:23:22,829 INFO L276 IsEmpty]: Start isEmpty. Operand 3039 states and 4979 transitions. [2020-12-22 07:23:22,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 07:23:22,833 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:23:22,834 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 07:23:22,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:23:22,834 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:23:22,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:23:22,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1405282905, now seen corresponding path program 1 times [2020-12-22 07:23:22,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:23:22,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849677674] [2020-12-22 07:23:22,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:23:22,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:23:23,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:23:23,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849677674] [2020-12-22 07:23:23,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:23:23,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:23:23,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821514096] [2020-12-22 07:23:23,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:23:23,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:23:23,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:23:23,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:23:23,106 INFO L87 Difference]: Start difference. First operand 3039 states and 4979 transitions. Second operand 4 states. [2020-12-22 07:23:23,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:23:23,341 INFO L93 Difference]: Finished difference Result 8943 states and 14761 transitions. [2020-12-22 07:23:23,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:23:23,341 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2020-12-22 07:23:23,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:23:23,374 INFO L225 Difference]: With dead ends: 8943 [2020-12-22 07:23:23,374 INFO L226 Difference]: Without dead ends: 6096 [2020-12-22 07:23:23,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:23:23,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6096 states. [2020-12-22 07:23:23,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6096 to 4509. [2020-12-22 07:23:23,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4509 states. [2020-12-22 07:23:23,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4509 states to 4509 states and 7408 transitions. [2020-12-22 07:23:23,621 INFO L78 Accepts]: Start accepts. Automaton has 4509 states and 7408 transitions. Word has length 131 [2020-12-22 07:23:23,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:23:23,621 INFO L481 AbstractCegarLoop]: Abstraction has 4509 states and 7408 transitions. [2020-12-22 07:23:23,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:23:23,621 INFO L276 IsEmpty]: Start isEmpty. Operand 4509 states and 7408 transitions. [2020-12-22 07:23:23,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 07:23:23,625 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:23:23,626 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 07:23:23,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:23:23,626 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:23:23,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:23:23,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1311505199, now seen corresponding path program 1 times [2020-12-22 07:23:23,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:23:23,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53758131] [2020-12-22 07:23:23,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:23:23,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:23:23,724 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 07:23:23,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53758131] [2020-12-22 07:23:23,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:23:23,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:23:23,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254231728] [2020-12-22 07:23:23,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:23:23,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:23:23,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:23:23,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:23:23,727 INFO L87 Difference]: Start difference. First operand 4509 states and 7408 transitions. Second operand 4 states. [2020-12-22 07:23:24,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:23:24,016 INFO L93 Difference]: Finished difference Result 13196 states and 21768 transitions. [2020-12-22 07:23:24,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:23:24,016 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 132 [2020-12-22 07:23:24,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:23:24,063 INFO L225 Difference]: With dead ends: 13196 [2020-12-22 07:23:24,063 INFO L226 Difference]: Without dead ends: 8879 [2020-12-22 07:23:24,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:23:24,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8879 states. [2020-12-22 07:23:24,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8879 to 6670. [2020-12-22 07:23:24,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6670 states. [2020-12-22 07:23:24,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6670 states to 6670 states and 10951 transitions. [2020-12-22 07:23:24,378 INFO L78 Accepts]: Start accepts. Automaton has 6670 states and 10951 transitions. Word has length 132 [2020-12-22 07:23:24,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:23:24,379 INFO L481 AbstractCegarLoop]: Abstraction has 6670 states and 10951 transitions. [2020-12-22 07:23:24,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:23:24,379 INFO L276 IsEmpty]: Start isEmpty. Operand 6670 states and 10951 transitions. [2020-12-22 07:23:24,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-12-22 07:23:24,384 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:23:24,384 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 07:23:24,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:23:24,385 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:23:24,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:23:24,385 INFO L82 PathProgramCache]: Analyzing trace with hash -547474472, now seen corresponding path program 1 times [2020-12-22 07:23:24,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:23:24,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625256023] [2020-12-22 07:23:24,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:23:24,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:23:24,457 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 07:23:24,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625256023] [2020-12-22 07:23:24,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:23:24,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:23:24,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255366382] [2020-12-22 07:23:24,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:23:24,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:23:24,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:23:24,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:23:24,460 INFO L87 Difference]: Start difference. First operand 6670 states and 10951 transitions. Second operand 3 states. [2020-12-22 07:23:24,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:23:24,728 INFO L93 Difference]: Finished difference Result 14829 states and 24485 transitions. [2020-12-22 07:23:24,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:23:24,728 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 133 [2020-12-22 07:23:24,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:23:24,751 INFO L225 Difference]: With dead ends: 14829 [2020-12-22 07:23:24,751 INFO L226 Difference]: Without dead ends: 10255 [2020-12-22 07:23:24,760 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 07:23:24,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10255 states. [2020-12-22 07:23:25,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10255 to 10253. [2020-12-22 07:23:25,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10253 states. [2020-12-22 07:23:25,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10253 states to 10253 states and 16819 transitions. [2020-12-22 07:23:25,221 INFO L78 Accepts]: Start accepts. Automaton has 10253 states and 16819 transitions. Word has length 133 [2020-12-22 07:23:25,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:23:25,221 INFO L481 AbstractCegarLoop]: Abstraction has 10253 states and 16819 transitions. [2020-12-22 07:23:25,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:23:25,221 INFO L276 IsEmpty]: Start isEmpty. Operand 10253 states and 16819 transitions. [2020-12-22 07:23:25,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-12-22 07:23:25,225 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:23:25,225 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 07:23:25,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:23:25,225 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:23:25,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:23:25,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1576389218, now seen corresponding path program 1 times [2020-12-22 07:23:25,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:23:25,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102032086] [2020-12-22 07:23:25,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:23:25,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:23:25,325 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 07:23:25,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102032086] [2020-12-22 07:23:25,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:23:25,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:23:25,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121070698] [2020-12-22 07:23:25,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:23:25,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:23:25,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:23:25,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:23:25,328 INFO L87 Difference]: Start difference. First operand 10253 states and 16819 transitions. Second operand 3 states. [2020-12-22 07:23:25,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:23:25,712 INFO L93 Difference]: Finished difference Result 22652 states and 37216 transitions. [2020-12-22 07:23:25,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:23:25,713 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 133 [2020-12-22 07:23:25,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:23:25,842 INFO L225 Difference]: With dead ends: 22652 [2020-12-22 07:23:25,842 INFO L226 Difference]: Without dead ends: 15630 [2020-12-22 07:23:25,854 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 07:23:25,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15630 states. [2020-12-22 07:23:26,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15630 to 15628. [2020-12-22 07:23:26,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15628 states. [2020-12-22 07:23:26,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15628 states to 15628 states and 25522 transitions. [2020-12-22 07:23:26,424 INFO L78 Accepts]: Start accepts. Automaton has 15628 states and 25522 transitions. Word has length 133 [2020-12-22 07:23:26,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:23:26,425 INFO L481 AbstractCegarLoop]: Abstraction has 15628 states and 25522 transitions. [2020-12-22 07:23:26,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:23:26,425 INFO L276 IsEmpty]: Start isEmpty. Operand 15628 states and 25522 transitions. [2020-12-22 07:23:26,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-12-22 07:23:26,426 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:23:26,427 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 07:23:26,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:23:26,427 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:23:26,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:23:26,428 INFO L82 PathProgramCache]: Analyzing trace with hash 721034008, now seen corresponding path program 1 times [2020-12-22 07:23:26,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:23:26,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823186571] [2020-12-22 07:23:26,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:23:26,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:23:26,506 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 07:23:26,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823186571] [2020-12-22 07:23:26,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:23:26,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:23:26,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099686178] [2020-12-22 07:23:26,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:23:26,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:23:26,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:23:26,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:23:26,509 INFO L87 Difference]: Start difference. First operand 15628 states and 25522 transitions. Second operand 3 states. [2020-12-22 07:23:27,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:23:27,109 INFO L93 Difference]: Finished difference Result 30486 states and 49905 transitions. [2020-12-22 07:23:27,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:23:27,109 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 133 [2020-12-22 07:23:27,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:23:27,154 INFO L225 Difference]: With dead ends: 30486 [2020-12-22 07:23:27,154 INFO L226 Difference]: Without dead ends: 21963 [2020-12-22 07:23:27,170 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 07:23:27,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21963 states. [2020-12-22 07:23:28,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21963 to 21961. [2020-12-22 07:23:28,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21961 states. [2020-12-22 07:23:28,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21961 states to 21961 states and 35721 transitions. [2020-12-22 07:23:28,194 INFO L78 Accepts]: Start accepts. Automaton has 21961 states and 35721 transitions. Word has length 133 [2020-12-22 07:23:28,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:23:28,195 INFO L481 AbstractCegarLoop]: Abstraction has 21961 states and 35721 transitions. [2020-12-22 07:23:28,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:23:28,195 INFO L276 IsEmpty]: Start isEmpty. Operand 21961 states and 35721 transitions. [2020-12-22 07:23:28,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-12-22 07:23:28,197 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:23:28,197 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 07:23:28,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:23:28,197 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:23:28,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:23:28,198 INFO L82 PathProgramCache]: Analyzing trace with hash 536413840, now seen corresponding path program 1 times [2020-12-22 07:23:28,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:23:28,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77590053] [2020-12-22 07:23:28,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:23:28,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:23:28,289 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 07:23:28,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77590053] [2020-12-22 07:23:28,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:23:28,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:23:28,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588409541] [2020-12-22 07:23:28,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:23:28,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:23:28,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:23:28,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:23:28,291 INFO L87 Difference]: Start difference. First operand 21961 states and 35721 transitions. Second operand 4 states. [2020-12-22 07:23:29,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:23:29,671 INFO L93 Difference]: Finished difference Result 70938 states and 115706 transitions. [2020-12-22 07:23:29,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:23:29,672 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 133 [2020-12-22 07:23:29,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:23:29,901 INFO L225 Difference]: With dead ends: 70938 [2020-12-22 07:23:29,902 INFO L226 Difference]: Without dead ends: 49197 [2020-12-22 07:23:29,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:23:30,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49197 states. [2020-12-22 07:23:31,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49197 to 35486. [2020-12-22 07:23:31,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35486 states. [2020-12-22 07:23:31,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35486 states to 35486 states and 57573 transitions. [2020-12-22 07:23:31,437 INFO L78 Accepts]: Start accepts. Automaton has 35486 states and 57573 transitions. Word has length 133 [2020-12-22 07:23:31,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:23:31,438 INFO L481 AbstractCegarLoop]: Abstraction has 35486 states and 57573 transitions. [2020-12-22 07:23:31,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:23:31,438 INFO L276 IsEmpty]: Start isEmpty. Operand 35486 states and 57573 transitions. [2020-12-22 07:23:31,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-12-22 07:23:31,440 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:23:31,440 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 07:23:31,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:23:31,440 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:23:31,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:23:31,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1673295070, now seen corresponding path program 1 times [2020-12-22 07:23:31,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:23:31,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336172887] [2020-12-22 07:23:31,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:23:31,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:23:31,544 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 07:23:31,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336172887] [2020-12-22 07:23:31,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:23:31,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:23:31,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646010228] [2020-12-22 07:23:31,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:23:31,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:23:31,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:23:31,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:23:31,546 INFO L87 Difference]: Start difference. First operand 35486 states and 57573 transitions. Second operand 3 states. [2020-12-22 07:23:33,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:23:33,043 INFO L93 Difference]: Finished difference Result 69604 states and 113196 transitions. [2020-12-22 07:23:33,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:23:33,043 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 133 [2020-12-22 07:23:33,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:23:33,188 INFO L225 Difference]: With dead ends: 69604 [2020-12-22 07:23:33,188 INFO L226 Difference]: Without dead ends: 49801 [2020-12-22 07:23:33,220 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 07:23:33,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49801 states. [2020-12-22 07:23:34,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49801 to 49799. [2020-12-22 07:23:34,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49799 states. [2020-12-22 07:23:34,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49799 states to 49799 states and 80392 transitions. [2020-12-22 07:23:34,910 INFO L78 Accepts]: Start accepts. Automaton has 49799 states and 80392 transitions. Word has length 133 [2020-12-22 07:23:34,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:23:34,910 INFO L481 AbstractCegarLoop]: Abstraction has 49799 states and 80392 transitions. [2020-12-22 07:23:34,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:23:34,911 INFO L276 IsEmpty]: Start isEmpty. Operand 49799 states and 80392 transitions. [2020-12-22 07:23:34,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 07:23:34,912 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:23:34,912 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 07:23:34,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:23:34,913 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:23:34,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:23:34,914 INFO L82 PathProgramCache]: Analyzing trace with hash -2138633752, now seen corresponding path program 1 times [2020-12-22 07:23:34,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:23:34,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453177285] [2020-12-22 07:23:34,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:23:34,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:23:35,002 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 07:23:35,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453177285] [2020-12-22 07:23:35,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:23:35,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:23:35,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338652356] [2020-12-22 07:23:35,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:23:35,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:23:35,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:23:35,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:23:35,004 INFO L87 Difference]: Start difference. First operand 49799 states and 80392 transitions. Second operand 4 states. [2020-12-22 07:23:37,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:23:37,887 INFO L93 Difference]: Finished difference Result 160333 states and 259541 transitions. [2020-12-22 07:23:37,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:23:37,887 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 134 [2020-12-22 07:23:37,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:23:38,176 INFO L225 Difference]: With dead ends: 160333 [2020-12-22 07:23:38,176 INFO L226 Difference]: Without dead ends: 110767 [2020-12-22 07:23:38,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:23:38,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110767 states. [2020-12-22 07:23:40,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110767 to 80058. [2020-12-22 07:23:40,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80058 states. [2020-12-22 07:23:41,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80058 states to 80058 states and 128840 transitions. [2020-12-22 07:23:41,013 INFO L78 Accepts]: Start accepts. Automaton has 80058 states and 128840 transitions. Word has length 134 [2020-12-22 07:23:41,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:23:41,013 INFO L481 AbstractCegarLoop]: Abstraction has 80058 states and 128840 transitions. [2020-12-22 07:23:41,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:23:41,014 INFO L276 IsEmpty]: Start isEmpty. Operand 80058 states and 128840 transitions. [2020-12-22 07:23:41,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 07:23:41,015 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:23:41,015 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:23:41,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:23:41,016 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:23:41,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:23:41,017 INFO L82 PathProgramCache]: Analyzing trace with hash -153851200, now seen corresponding path program 1 times [2020-12-22 07:23:41,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:23:41,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791781002] [2020-12-22 07:23:41,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:23:41,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:23:41,218 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 07:23:41,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791781002] [2020-12-22 07:23:41,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:23:41,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:23:41,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652927070] [2020-12-22 07:23:41,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:23:41,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:23:41,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:23:41,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:23:41,221 INFO L87 Difference]: Start difference. First operand 80058 states and 128840 transitions. Second operand 6 states. [2020-12-22 07:23:43,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:23:43,580 INFO L93 Difference]: Finished difference Result 159885 states and 257310 transitions. [2020-12-22 07:23:43,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:23:43,581 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 136 [2020-12-22 07:23:43,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:23:43,725 INFO L225 Difference]: With dead ends: 159885 [2020-12-22 07:23:43,726 INFO L226 Difference]: Without dead ends: 80060 [2020-12-22 07:23:43,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:23:43,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80060 states. [2020-12-22 07:23:45,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80060 to 80058. [2020-12-22 07:23:45,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80058 states. [2020-12-22 07:23:46,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80058 states to 80058 states and 128215 transitions. [2020-12-22 07:23:46,232 INFO L78 Accepts]: Start accepts. Automaton has 80058 states and 128215 transitions. Word has length 136 [2020-12-22 07:23:46,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:23:46,232 INFO L481 AbstractCegarLoop]: Abstraction has 80058 states and 128215 transitions. [2020-12-22 07:23:46,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:23:46,232 INFO L276 IsEmpty]: Start isEmpty. Operand 80058 states and 128215 transitions. [2020-12-22 07:23:46,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-12-22 07:23:46,234 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:23:46,234 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:23:46,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:23:46,234 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:23:46,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:23:46,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1698314093, now seen corresponding path program 1 times [2020-12-22 07:23:46,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:23:46,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322953743] [2020-12-22 07:23:46,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:23:46,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:23:46,444 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 07:23:46,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322953743] [2020-12-22 07:23:46,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:23:46,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:23:46,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644936924] [2020-12-22 07:23:46,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:23:46,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:23:46,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:23:46,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:23:46,447 INFO L87 Difference]: Start difference. First operand 80058 states and 128215 transitions. Second operand 4 states. [2020-12-22 07:23:50,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:23:50,192 INFO L93 Difference]: Finished difference Result 238287 states and 381573 transitions. [2020-12-22 07:23:50,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:23:50,192 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 139 [2020-12-22 07:23:50,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:23:50,473 INFO L225 Difference]: With dead ends: 238287 [2020-12-22 07:23:50,473 INFO L226 Difference]: Without dead ends: 158240 [2020-12-22 07:23:50,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:23:50,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158240 states. [2020-12-22 07:23:55,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158240 to 158238. [2020-12-22 07:23:55,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158238 states. [2020-12-22 07:23:55,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158238 states to 158238 states and 252200 transitions. [2020-12-22 07:23:55,525 INFO L78 Accepts]: Start accepts. Automaton has 158238 states and 252200 transitions. Word has length 139 [2020-12-22 07:23:55,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:23:55,526 INFO L481 AbstractCegarLoop]: Abstraction has 158238 states and 252200 transitions. [2020-12-22 07:23:55,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:23:55,526 INFO L276 IsEmpty]: Start isEmpty. Operand 158238 states and 252200 transitions. [2020-12-22 07:23:55,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-12-22 07:23:55,528 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:23:55,528 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:23:55,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:23:55,528 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:23:55,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:23:55,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1498816216, now seen corresponding path program 1 times [2020-12-22 07:23:55,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:23:55,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087164804] [2020-12-22 07:23:55,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:23:55,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:23:55,715 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 07:23:55,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087164804] [2020-12-22 07:23:55,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:23:55,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:23:55,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084596119] [2020-12-22 07:23:55,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:23:55,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:23:55,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:23:55,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:23:55,718 INFO L87 Difference]: Start difference. First operand 158238 states and 252200 transitions. Second operand 4 states. [2020-12-22 07:24:03,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:03,355 INFO L93 Difference]: Finished difference Result 470952 states and 750479 transitions. [2020-12-22 07:24:03,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:24:03,355 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 141 [2020-12-22 07:24:03,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:03,907 INFO L225 Difference]: With dead ends: 470952 [2020-12-22 07:24:03,907 INFO L226 Difference]: Without dead ends: 312726 [2020-12-22 07:24:04,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:24:04,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312726 states. [2020-12-22 07:24:13,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312726 to 312724. [2020-12-22 07:24:13,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312724 states. [2020-12-22 07:24:13,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312724 states to 312724 states and 495946 transitions. [2020-12-22 07:24:13,764 INFO L78 Accepts]: Start accepts. Automaton has 312724 states and 495946 transitions. Word has length 141 [2020-12-22 07:24:13,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:13,765 INFO L481 AbstractCegarLoop]: Abstraction has 312724 states and 495946 transitions. [2020-12-22 07:24:13,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:24:13,765 INFO L276 IsEmpty]: Start isEmpty. Operand 312724 states and 495946 transitions. [2020-12-22 07:24:13,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-12-22 07:24:13,782 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:13,782 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:13,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:24:13,782 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:13,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:13,783 INFO L82 PathProgramCache]: Analyzing trace with hash -200929965, now seen corresponding path program 1 times [2020-12-22 07:24:13,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:13,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053184072] [2020-12-22 07:24:13,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:13,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:14,469 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 07:24:14,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053184072] [2020-12-22 07:24:14,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:14,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:24:14,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43894716] [2020-12-22 07:24:14,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:24:14,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:14,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:24:14,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:24:14,473 INFO L87 Difference]: Start difference. First operand 312724 states and 495946 transitions. Second operand 4 states. [2020-12-22 07:24:30,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:30,037 INFO L93 Difference]: Finished difference Result 930649 states and 1475599 transitions. [2020-12-22 07:24:30,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:24:30,037 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 143 [2020-12-22 07:24:30,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:31,637 INFO L225 Difference]: With dead ends: 930649 [2020-12-22 07:24:31,637 INFO L226 Difference]: Without dead ends: 617952 [2020-12-22 07:24:31,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:24:32,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617952 states. [2020-12-22 07:24:54,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617952 to 617950. [2020-12-22 07:24:54,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 617950 states. [2020-12-22 07:24:56,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617950 states to 617950 states and 974995 transitions. [2020-12-22 07:24:56,724 INFO L78 Accepts]: Start accepts. Automaton has 617950 states and 974995 transitions. Word has length 143 [2020-12-22 07:24:56,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:56,725 INFO L481 AbstractCegarLoop]: Abstraction has 617950 states and 974995 transitions. [2020-12-22 07:24:56,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:24:56,725 INFO L276 IsEmpty]: Start isEmpty. Operand 617950 states and 974995 transitions. [2020-12-22 07:24:56,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-12-22 07:24:56,743 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:56,747 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:56,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:24:56,748 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:56,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:56,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1235528920, now seen corresponding path program 1 times [2020-12-22 07:24:56,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:56,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062634473] [2020-12-22 07:24:56,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:56,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:57,022 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 07:24:57,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062634473] [2020-12-22 07:24:57,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:57,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:24:57,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357073537] [2020-12-22 07:24:57,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:24:57,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:57,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:24:57,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:24:57,025 INFO L87 Difference]: Start difference. First operand 617950 states and 974995 transitions. Second operand 4 states. [2020-12-22 07:25:37,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:37,252 INFO L93 Difference]: Finished difference Result 1838642 states and 2900233 transitions. [2020-12-22 07:25:37,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:25:37,253 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 145 [2020-12-22 07:25:37,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:40,724 INFO L225 Difference]: With dead ends: 1838642 [2020-12-22 07:25:40,725 INFO L226 Difference]: Without dead ends: 1220828 [2020-12-22 07:25:41,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:25:42,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220828 states.