/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/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label00.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:23:30,833 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:23:30,836 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:23:30,888 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:23:30,889 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:23:30,893 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:23:30,896 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:23:30,904 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:23:30,907 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:23:30,913 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:23:30,914 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:23:30,915 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:23:30,916 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:23:30,919 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:23:30,921 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:23:30,922 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:23:30,923 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:23:30,928 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:23:30,943 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:23:30,952 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:23:30,959 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:23:30,960 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:23:30,962 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:23:30,963 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:23:30,971 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:23:30,982 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:23:30,983 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:23:30,984 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:23:30,989 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:23:31,041 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:23:31,041 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:23:31,046 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:23:31,046 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:23:31,046 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:23:31,046 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:23:31,047 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:23:31,047 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:23:31,047 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:23:31,048 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:23:31,049 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:23:31,049 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:23:31,049 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:23:31,049 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:23:31,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:23:31,050 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:23:31,050 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:23:31,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:23:31,051 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:23:31,051 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:23:31,051 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:23:31,051 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:23:31,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:23:31,052 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:23:31,052 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:23:31,052 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:23:31,453 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:23:31,490 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:23:31,494 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:23:31,495 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:23:31,496 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:23:31,497 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label00.c [2020-12-22 10:23:31,570 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7fb387e2/8ceb64e7c9d849ea8aa544771e40ab47/FLAG85162eb87 [2020-12-22 10:23:32,645 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:23:32,646 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label00.c [2020-12-22 10:23:32,698 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7fb387e2/8ceb64e7c9d849ea8aa544771e40ab47/FLAG85162eb87 [2020-12-22 10:23:33,085 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7fb387e2/8ceb64e7c9d849ea8aa544771e40ab47 [2020-12-22 10:23:33,088 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:23:33,091 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:23:33,095 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:23:33,095 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:23:33,099 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:23:33,100 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:23:33" (1/1) ... [2020-12-22 10:23:33,102 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@361f63a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:23:33, skipping insertion in model container [2020-12-22 10:23:33,102 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:23:33" (1/1) ... [2020-12-22 10:23:33,111 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:23:33,304 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:23:33,727 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/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label00.c[26875,26888] [2020-12-22 10:23:33,756 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/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label00.c[28507,28520] [2020-12-22 10:23:34,677 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:23:34,694 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:23:34,831 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/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label00.c[26875,26888] [2020-12-22 10:23:34,836 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/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label00.c[28507,28520] [2020-12-22 10:23:35,442 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:23:35,511 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:23:35,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:23:35 WrapperNode [2020-12-22 10:23:35,512 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:23:35,513 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:23:35,513 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:23:35,513 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:23:35,522 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:23:35" (1/1) ... [2020-12-22 10:23:35,583 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:23:35" (1/1) ... [2020-12-22 10:23:36,055 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:23:36,057 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:23:36,057 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:23:36,057 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:23:36,068 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:23:35" (1/1) ... [2020-12-22 10:23:36,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:23:35" (1/1) ... [2020-12-22 10:23:36,160 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:23:35" (1/1) ... [2020-12-22 10:23:36,161 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:23:35" (1/1) ... [2020-12-22 10:23:36,435 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:23:35" (1/1) ... [2020-12-22 10:23:36,480 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:23:35" (1/1) ... [2020-12-22 10:23:36,523 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:23:35" (1/1) ... [2020-12-22 10:23:36,659 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:23:36,665 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:23:36,665 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:23:36,665 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:23:36,669 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:23:35" (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 10:23:36,852 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:23:36,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:23:36,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:23:36,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:23:43,913 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:23:43,915 INFO L299 CfgBuilder]: Removed 42 assume(true) statements. [2020-12-22 10:23:43,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:23:43 BoogieIcfgContainer [2020-12-22 10:23:43,923 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:23:43,924 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:23:43,924 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:23:43,929 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:23:43,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:23:33" (1/3) ... [2020-12-22 10:23:43,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71015343 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:23:43, skipping insertion in model container [2020-12-22 10:23:43,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:23:35" (2/3) ... [2020-12-22 10:23:43,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71015343 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:23:43, skipping insertion in model container [2020-12-22 10:23:43,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:23:43" (3/3) ... [2020-12-22 10:23:43,934 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label00.c [2020-12-22 10:23:43,940 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:23:43,946 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:23:43,965 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:23:44,003 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:23:44,003 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:23:44,003 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:23:44,003 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:23:44,003 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:23:44,004 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:23:44,004 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:23:44,004 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:23:44,041 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states. [2020-12-22 10:23:44,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 10:23:44,049 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:44,050 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:23:44,050 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:44,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:44,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1776705813, now seen corresponding path program 1 times [2020-12-22 10:23:44,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:44,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000427442] [2020-12-22 10:23:44,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:44,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:44,387 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 10:23:44,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000427442] [2020-12-22 10:23:44,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:44,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:23:44,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177653688] [2020-12-22 10:23:44,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:23:44,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:44,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:23:44,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:23:44,417 INFO L87 Difference]: Start difference. First operand 964 states. Second operand 3 states. [2020-12-22 10:23:53,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:53,006 INFO L93 Difference]: Finished difference Result 2614 states and 5016 transitions. [2020-12-22 10:23:53,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:23:53,009 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-12-22 10:23:53,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:53,045 INFO L225 Difference]: With dead ends: 2614 [2020-12-22 10:23:53,045 INFO L226 Difference]: Without dead ends: 1649 [2020-12-22 10:23:53,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 10:23:53,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2020-12-22 10:23:53,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 1649. [2020-12-22 10:23:53,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1649 states. [2020-12-22 10:23:53,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 2717 transitions. [2020-12-22 10:23:53,229 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 2717 transitions. Word has length 16 [2020-12-22 10:23:53,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:53,229 INFO L481 AbstractCegarLoop]: Abstraction has 1649 states and 2717 transitions. [2020-12-22 10:23:53,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:23:53,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 2717 transitions. [2020-12-22 10:23:53,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 10:23:53,235 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:53,236 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] [2020-12-22 10:23:53,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:23:53,237 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:53,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:53,239 INFO L82 PathProgramCache]: Analyzing trace with hash 2117945689, now seen corresponding path program 1 times [2020-12-22 10:23:53,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:53,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219537050] [2020-12-22 10:23:53,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:53,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:53,479 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 10:23:53,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219537050] [2020-12-22 10:23:53,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:53,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:23:53,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23930369] [2020-12-22 10:23:53,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:23:53,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:53,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:23:53,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:23:53,484 INFO L87 Difference]: Start difference. First operand 1649 states and 2717 transitions. Second operand 5 states. [2020-12-22 10:23:53,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:53,717 INFO L93 Difference]: Finished difference Result 1730 states and 2844 transitions. [2020-12-22 10:23:53,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:23:53,718 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-12-22 10:23:53,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:53,729 INFO L225 Difference]: With dead ends: 1730 [2020-12-22 10:23:53,730 INFO L226 Difference]: Without dead ends: 1649 [2020-12-22 10:23:53,731 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 10:23:53,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2020-12-22 10:23:53,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 1649. [2020-12-22 10:23:53,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1649 states. [2020-12-22 10:23:53,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 2656 transitions. [2020-12-22 10:23:53,785 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 2656 transitions. Word has length 46 [2020-12-22 10:23:53,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:53,785 INFO L481 AbstractCegarLoop]: Abstraction has 1649 states and 2656 transitions. [2020-12-22 10:23:53,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:23:53,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 2656 transitions. [2020-12-22 10:23:53,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-22 10:23:53,798 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:53,799 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:23:53,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:23:53,800 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:53,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:53,804 INFO L82 PathProgramCache]: Analyzing trace with hash -724902301, now seen corresponding path program 1 times [2020-12-22 10:23:53,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:53,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467143531] [2020-12-22 10:23:53,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:53,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:54,009 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:23:54,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467143531] [2020-12-22 10:23:54,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:54,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:23:54,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81271287] [2020-12-22 10:23:54,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:23:54,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:54,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:23:54,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:23:54,013 INFO L87 Difference]: Start difference. First operand 1649 states and 2656 transitions. Second operand 3 states. [2020-12-22 10:24:02,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:02,082 INFO L93 Difference]: Finished difference Result 4655 states and 7583 transitions. [2020-12-22 10:24:02,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:24:02,083 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 87 [2020-12-22 10:24:02,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:02,104 INFO L225 Difference]: With dead ends: 4655 [2020-12-22 10:24:02,105 INFO L226 Difference]: Without dead ends: 3151 [2020-12-22 10:24:02,109 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 10:24:02,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2020-12-22 10:24:02,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 3151. [2020-12-22 10:24:02,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3151 states. [2020-12-22 10:24:02,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3151 states to 3151 states and 4812 transitions. [2020-12-22 10:24:02,192 INFO L78 Accepts]: Start accepts. Automaton has 3151 states and 4812 transitions. Word has length 87 [2020-12-22 10:24:02,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:02,195 INFO L481 AbstractCegarLoop]: Abstraction has 3151 states and 4812 transitions. [2020-12-22 10:24:02,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:24:02,195 INFO L276 IsEmpty]: Start isEmpty. Operand 3151 states and 4812 transitions. [2020-12-22 10:24:02,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-22 10:24:02,197 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:02,197 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:24:02,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:24:02,197 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:02,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:02,198 INFO L82 PathProgramCache]: Analyzing trace with hash 524693361, now seen corresponding path program 1 times [2020-12-22 10:24:02,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:02,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356871136] [2020-12-22 10:24:02,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:02,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:02,468 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:24:02,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356871136] [2020-12-22 10:24:02,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:02,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 10:24:02,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712268914] [2020-12-22 10:24:02,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:24:02,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:02,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:24:02,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:24:02,471 INFO L87 Difference]: Start difference. First operand 3151 states and 4812 transitions. Second operand 5 states. [2020-12-22 10:24:12,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:12,508 INFO L93 Difference]: Finished difference Result 6925 states and 10476 transitions. [2020-12-22 10:24:12,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:24:12,509 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 90 [2020-12-22 10:24:12,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:12,529 INFO L225 Difference]: With dead ends: 6925 [2020-12-22 10:24:12,529 INFO L226 Difference]: Without dead ends: 3919 [2020-12-22 10:24:12,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:24:12,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3919 states. [2020-12-22 10:24:12,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3919 to 3902. [2020-12-22 10:24:12,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3902 states. [2020-12-22 10:24:12,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3902 states to 3902 states and 5569 transitions. [2020-12-22 10:24:12,618 INFO L78 Accepts]: Start accepts. Automaton has 3902 states and 5569 transitions. Word has length 90 [2020-12-22 10:24:12,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:12,618 INFO L481 AbstractCegarLoop]: Abstraction has 3902 states and 5569 transitions. [2020-12-22 10:24:12,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:24:12,619 INFO L276 IsEmpty]: Start isEmpty. Operand 3902 states and 5569 transitions. [2020-12-22 10:24:12,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:24:12,620 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:12,620 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:24:12,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:24:12,621 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:12,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:12,621 INFO L82 PathProgramCache]: Analyzing trace with hash 211182729, now seen corresponding path program 1 times [2020-12-22 10:24:12,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:12,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039975102] [2020-12-22 10:24:12,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:12,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:12,776 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 10:24:12,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039975102] [2020-12-22 10:24:12,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:12,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:24:12,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957615013] [2020-12-22 10:24:12,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:24:12,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:12,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:24:12,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:24:12,781 INFO L87 Difference]: Start difference. First operand 3902 states and 5569 transitions. Second operand 3 states. [2020-12-22 10:24:12,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:12,838 INFO L93 Difference]: Finished difference Result 4050 states and 5805 transitions. [2020-12-22 10:24:12,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:24:12,839 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:24:12,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:12,860 INFO L225 Difference]: With dead ends: 4050 [2020-12-22 10:24:12,860 INFO L226 Difference]: Without dead ends: 3973 [2020-12-22 10:24:12,862 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 10:24:12,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3973 states. [2020-12-22 10:24:12,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3973 to 3971. [2020-12-22 10:24:12,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3971 states. [2020-12-22 10:24:12,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3971 states to 3971 states and 5680 transitions. [2020-12-22 10:24:12,950 INFO L78 Accepts]: Start accepts. Automaton has 3971 states and 5680 transitions. Word has length 106 [2020-12-22 10:24:12,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:12,950 INFO L481 AbstractCegarLoop]: Abstraction has 3971 states and 5680 transitions. [2020-12-22 10:24:12,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:24:12,951 INFO L276 IsEmpty]: Start isEmpty. Operand 3971 states and 5680 transitions. [2020-12-22 10:24:12,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:24:12,958 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:12,958 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] [2020-12-22 10:24:12,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:24:12,958 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:12,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:12,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1458691583, now seen corresponding path program 1 times [2020-12-22 10:24:12,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:12,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005243485] [2020-12-22 10:24:12,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:12,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:13,082 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 10:24:13,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005243485] [2020-12-22 10:24:13,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:13,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:24:13,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99278367] [2020-12-22 10:24:13,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:24:13,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:13,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:24:13,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:24:13,085 INFO L87 Difference]: Start difference. First operand 3971 states and 5680 transitions. Second operand 3 states. [2020-12-22 10:24:13,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:13,140 INFO L93 Difference]: Finished difference Result 4251 states and 6128 transitions. [2020-12-22 10:24:13,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:24:13,142 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:24:13,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:13,161 INFO L225 Difference]: With dead ends: 4251 [2020-12-22 10:24:13,162 INFO L226 Difference]: Without dead ends: 4105 [2020-12-22 10:24:13,163 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 10:24:13,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4105 states. [2020-12-22 10:24:13,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4105 to 4103. [2020-12-22 10:24:13,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4103 states. [2020-12-22 10:24:13,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4103 states to 4103 states and 5891 transitions. [2020-12-22 10:24:13,250 INFO L78 Accepts]: Start accepts. Automaton has 4103 states and 5891 transitions. Word has length 106 [2020-12-22 10:24:13,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:13,251 INFO L481 AbstractCegarLoop]: Abstraction has 4103 states and 5891 transitions. [2020-12-22 10:24:13,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:24:13,251 INFO L276 IsEmpty]: Start isEmpty. Operand 4103 states and 5891 transitions. [2020-12-22 10:24:13,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:24:13,252 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:13,253 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] [2020-12-22 10:24:13,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:24:13,253 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:13,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:13,254 INFO L82 PathProgramCache]: Analyzing trace with hash 717259381, now seen corresponding path program 1 times [2020-12-22 10:24:13,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:13,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346703852] [2020-12-22 10:24:13,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:13,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:13,343 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 10:24:13,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346703852] [2020-12-22 10:24:13,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:13,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:24:13,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872589275] [2020-12-22 10:24:13,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:24:13,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:13,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:24:13,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:24:13,346 INFO L87 Difference]: Start difference. First operand 4103 states and 5891 transitions. Second operand 3 states. [2020-12-22 10:24:13,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:13,408 INFO L93 Difference]: Finished difference Result 4635 states and 6741 transitions. [2020-12-22 10:24:13,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:24:13,409 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:24:13,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:13,432 INFO L225 Difference]: With dead ends: 4635 [2020-12-22 10:24:13,433 INFO L226 Difference]: Without dead ends: 4357 [2020-12-22 10:24:13,437 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 10:24:13,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4357 states. [2020-12-22 10:24:13,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4357 to 4355. [2020-12-22 10:24:13,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4355 states. [2020-12-22 10:24:13,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4355 states to 4355 states and 6291 transitions. [2020-12-22 10:24:13,571 INFO L78 Accepts]: Start accepts. Automaton has 4355 states and 6291 transitions. Word has length 106 [2020-12-22 10:24:13,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:13,572 INFO L481 AbstractCegarLoop]: Abstraction has 4355 states and 6291 transitions. [2020-12-22 10:24:13,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:24:13,573 INFO L276 IsEmpty]: Start isEmpty. Operand 4355 states and 6291 transitions. [2020-12-22 10:24:13,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:24:13,575 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:13,575 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] [2020-12-22 10:24:13,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:24:13,576 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:13,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:13,577 INFO L82 PathProgramCache]: Analyzing trace with hash -28323349, now seen corresponding path program 1 times [2020-12-22 10:24:13,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:13,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589455345] [2020-12-22 10:24:13,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:13,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:13,718 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 10:24:13,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589455345] [2020-12-22 10:24:13,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:13,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:24:13,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392508092] [2020-12-22 10:24:13,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:24:13,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:13,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:24:13,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:24:13,723 INFO L87 Difference]: Start difference. First operand 4355 states and 6291 transitions. Second operand 3 states. [2020-12-22 10:24:13,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:13,822 INFO L93 Difference]: Finished difference Result 5367 states and 7901 transitions. [2020-12-22 10:24:13,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:24:13,824 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:24:13,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:13,874 INFO L225 Difference]: With dead ends: 5367 [2020-12-22 10:24:13,874 INFO L226 Difference]: Without dead ends: 4837 [2020-12-22 10:24:13,880 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 10:24:13,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4837 states. [2020-12-22 10:24:13,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4837 to 4835. [2020-12-22 10:24:13,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4835 states. [2020-12-22 10:24:14,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4835 states to 4835 states and 7047 transitions. [2020-12-22 10:24:14,009 INFO L78 Accepts]: Start accepts. Automaton has 4835 states and 7047 transitions. Word has length 106 [2020-12-22 10:24:14,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:14,010 INFO L481 AbstractCegarLoop]: Abstraction has 4835 states and 7047 transitions. [2020-12-22 10:24:14,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:24:14,010 INFO L276 IsEmpty]: Start isEmpty. Operand 4835 states and 7047 transitions. [2020-12-22 10:24:14,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:24:14,011 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:14,011 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] [2020-12-22 10:24:14,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:24:14,012 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:14,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:14,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1968354207, now seen corresponding path program 1 times [2020-12-22 10:24:14,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:14,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705444443] [2020-12-22 10:24:14,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:14,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:14,128 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 10:24:14,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705444443] [2020-12-22 10:24:14,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:14,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:24:14,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794888959] [2020-12-22 10:24:14,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:24:14,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:14,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:24:14,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:24:14,133 INFO L87 Difference]: Start difference. First operand 4835 states and 7047 transitions. Second operand 3 states. [2020-12-22 10:24:14,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:14,232 INFO L93 Difference]: Finished difference Result 6759 states and 10089 transitions. [2020-12-22 10:24:14,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:24:14,233 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:24:14,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:14,245 INFO L225 Difference]: With dead ends: 6759 [2020-12-22 10:24:14,246 INFO L226 Difference]: Without dead ends: 5749 [2020-12-22 10:24:14,249 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 10:24:14,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5749 states. [2020-12-22 10:24:14,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5749 to 5747. [2020-12-22 10:24:14,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5747 states. [2020-12-22 10:24:14,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5747 states to 5747 states and 8471 transitions. [2020-12-22 10:24:14,410 INFO L78 Accepts]: Start accepts. Automaton has 5747 states and 8471 transitions. Word has length 106 [2020-12-22 10:24:14,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:14,410 INFO L481 AbstractCegarLoop]: Abstraction has 5747 states and 8471 transitions. [2020-12-22 10:24:14,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:24:14,411 INFO L276 IsEmpty]: Start isEmpty. Operand 5747 states and 8471 transitions. [2020-12-22 10:24:14,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:24:14,412 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:14,412 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] [2020-12-22 10:24:14,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:24:14,412 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:14,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:14,413 INFO L82 PathProgramCache]: Analyzing trace with hash 732328407, now seen corresponding path program 1 times [2020-12-22 10:24:14,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:14,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761566652] [2020-12-22 10:24:14,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:14,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:14,508 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 10:24:14,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761566652] [2020-12-22 10:24:14,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:14,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:24:14,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862947368] [2020-12-22 10:24:14,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:24:14,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:14,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:24:14,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:24:14,511 INFO L87 Difference]: Start difference. First operand 5747 states and 8471 transitions. Second operand 3 states. [2020-12-22 10:24:14,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:14,739 INFO L93 Difference]: Finished difference Result 9399 states and 14201 transitions. [2020-12-22 10:24:14,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:24:14,740 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:24:14,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:14,755 INFO L225 Difference]: With dead ends: 9399 [2020-12-22 10:24:14,756 INFO L226 Difference]: Without dead ends: 7477 [2020-12-22 10:24:14,760 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 10:24:14,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7477 states. [2020-12-22 10:24:14,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7477 to 7475. [2020-12-22 10:24:14,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7475 states. [2020-12-22 10:24:14,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7475 states to 7475 states and 11143 transitions. [2020-12-22 10:24:14,967 INFO L78 Accepts]: Start accepts. Automaton has 7475 states and 11143 transitions. Word has length 106 [2020-12-22 10:24:14,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:14,968 INFO L481 AbstractCegarLoop]: Abstraction has 7475 states and 11143 transitions. [2020-12-22 10:24:14,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:24:14,968 INFO L276 IsEmpty]: Start isEmpty. Operand 7475 states and 11143 transitions. [2020-12-22 10:24:14,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:24:14,969 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:14,970 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] [2020-12-22 10:24:14,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:24:14,970 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:14,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:14,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1070121549, now seen corresponding path program 1 times [2020-12-22 10:24:14,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:14,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882689926] [2020-12-22 10:24:14,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:14,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:15,088 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 10:24:15,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882689926] [2020-12-22 10:24:15,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:15,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:24:15,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902106414] [2020-12-22 10:24:15,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:24:15,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:15,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:24:15,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:24:15,092 INFO L87 Difference]: Start difference. First operand 7475 states and 11143 transitions. Second operand 3 states. [2020-12-22 10:24:15,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:15,359 INFO L93 Difference]: Finished difference Result 14391 states and 21897 transitions. [2020-12-22 10:24:15,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:24:15,360 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:24:15,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:15,383 INFO L225 Difference]: With dead ends: 14391 [2020-12-22 10:24:15,384 INFO L226 Difference]: Without dead ends: 10741 [2020-12-22 10:24:15,392 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 10:24:15,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10741 states. [2020-12-22 10:24:15,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10741 to 10739. [2020-12-22 10:24:15,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10739 states. [2020-12-22 10:24:15,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10739 states to 10739 states and 16135 transitions. [2020-12-22 10:24:15,750 INFO L78 Accepts]: Start accepts. Automaton has 10739 states and 16135 transitions. Word has length 106 [2020-12-22 10:24:15,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:15,751 INFO L481 AbstractCegarLoop]: Abstraction has 10739 states and 16135 transitions. [2020-12-22 10:24:15,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:24:15,751 INFO L276 IsEmpty]: Start isEmpty. Operand 10739 states and 16135 transitions. [2020-12-22 10:24:15,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:24:15,752 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:15,752 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] [2020-12-22 10:24:15,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:24:15,753 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:15,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:15,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1478760321, now seen corresponding path program 1 times [2020-12-22 10:24:15,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:15,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580952216] [2020-12-22 10:24:15,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:15,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:15,973 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 10:24:15,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580952216] [2020-12-22 10:24:15,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:15,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:24:15,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000350560] [2020-12-22 10:24:15,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:24:15,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:15,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:24:15,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:24:15,977 INFO L87 Difference]: Start difference. First operand 10739 states and 16135 transitions. Second operand 10 states. [2020-12-22 10:24:20,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:20,142 INFO L93 Difference]: Finished difference Result 121363 states and 187159 transitions. [2020-12-22 10:24:20,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 10:24:20,143 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 106 [2020-12-22 10:24:20,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:20,442 INFO L225 Difference]: With dead ends: 121363 [2020-12-22 10:24:20,442 INFO L226 Difference]: Without dead ends: 114449 [2020-12-22 10:24:20,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-12-22 10:24:20,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114449 states. [2020-12-22 10:24:22,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114449 to 17651. [2020-12-22 10:24:22,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17651 states. [2020-12-22 10:24:22,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17651 states to 17651 states and 26567 transitions. [2020-12-22 10:24:22,425 INFO L78 Accepts]: Start accepts. Automaton has 17651 states and 26567 transitions. Word has length 106 [2020-12-22 10:24:22,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:22,425 INFO L481 AbstractCegarLoop]: Abstraction has 17651 states and 26567 transitions. [2020-12-22 10:24:22,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:24:22,425 INFO L276 IsEmpty]: Start isEmpty. Operand 17651 states and 26567 transitions. [2020-12-22 10:24:22,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:24:22,427 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:22,427 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] [2020-12-22 10:24:22,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:24:22,428 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:22,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:22,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1961193007, now seen corresponding path program 1 times [2020-12-22 10:24:22,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:22,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793099252] [2020-12-22 10:24:22,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:22,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:22,529 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 10:24:22,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793099252] [2020-12-22 10:24:22,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:22,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:24:22,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571999520] [2020-12-22 10:24:22,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:24:22,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:22,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:24:22,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:24:22,531 INFO L87 Difference]: Start difference. First operand 17651 states and 26567 transitions. Second operand 3 states. [2020-12-22 10:24:23,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:23,943 INFO L93 Difference]: Finished difference Result 43895 states and 66377 transitions. [2020-12-22 10:24:23,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:24:23,944 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:24:23,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:24,017 INFO L225 Difference]: With dead ends: 43895 [2020-12-22 10:24:24,017 INFO L226 Difference]: Without dead ends: 30069 [2020-12-22 10:24:24,042 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 10:24:24,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30069 states. [2020-12-22 10:24:25,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30069 to 29811. [2020-12-22 10:24:25,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29811 states. [2020-12-22 10:24:25,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29811 states to 29811 states and 44359 transitions. [2020-12-22 10:24:25,518 INFO L78 Accepts]: Start accepts. Automaton has 29811 states and 44359 transitions. Word has length 108 [2020-12-22 10:24:25,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:25,518 INFO L481 AbstractCegarLoop]: Abstraction has 29811 states and 44359 transitions. [2020-12-22 10:24:25,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:24:25,518 INFO L276 IsEmpty]: Start isEmpty. Operand 29811 states and 44359 transitions. [2020-12-22 10:24:25,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:24:25,520 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:25,520 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] [2020-12-22 10:24:25,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:24:25,521 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:25,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:25,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1894699495, now seen corresponding path program 1 times [2020-12-22 10:24:25,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:25,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342450213] [2020-12-22 10:24:25,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:25,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:26,342 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 10:24:26,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342450213] [2020-12-22 10:24:26,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:26,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:24:26,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21756852] [2020-12-22 10:24:26,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:24:26,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:26,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:24:26,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:24:26,344 INFO L87 Difference]: Start difference. First operand 29811 states and 44359 transitions. Second operand 10 states. [2020-12-22 10:24:26,729 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-12-22 10:24:26,878 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-12-22 10:24:27,066 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-12-22 10:24:28,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:28,767 INFO L93 Difference]: Finished difference Result 55799 states and 83273 transitions. [2020-12-22 10:24:28,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:24:28,768 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 108 [2020-12-22 10:24:28,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:28,826 INFO L225 Difference]: With dead ends: 55799 [2020-12-22 10:24:28,826 INFO L226 Difference]: Without dead ends: 29813 [2020-12-22 10:24:28,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:24:28,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29813 states. [2020-12-22 10:24:30,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29813 to 29811. [2020-12-22 10:24:30,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29811 states. [2020-12-22 10:24:30,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29811 states to 29811 states and 44103 transitions. [2020-12-22 10:24:30,471 INFO L78 Accepts]: Start accepts. Automaton has 29811 states and 44103 transitions. Word has length 108 [2020-12-22 10:24:30,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:30,471 INFO L481 AbstractCegarLoop]: Abstraction has 29811 states and 44103 transitions. [2020-12-22 10:24:30,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:24:30,472 INFO L276 IsEmpty]: Start isEmpty. Operand 29811 states and 44103 transitions. [2020-12-22 10:24:30,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 10:24:30,473 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:30,473 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] [2020-12-22 10:24:30,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:24:30,474 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:30,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:30,474 INFO L82 PathProgramCache]: Analyzing trace with hash 979135041, now seen corresponding path program 1 times [2020-12-22 10:24:30,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:30,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925122396] [2020-12-22 10:24:30,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:30,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:30,628 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 10:24:30,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925122396] [2020-12-22 10:24:30,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:30,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:24:30,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651679964] [2020-12-22 10:24:30,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:24:30,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:30,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:24:30,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:24:30,630 INFO L87 Difference]: Start difference. First operand 29811 states and 44103 transitions. Second operand 6 states. [2020-12-22 10:24:32,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:32,538 INFO L93 Difference]: Finished difference Result 55797 states and 82760 transitions. [2020-12-22 10:24:32,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:24:32,539 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 109 [2020-12-22 10:24:32,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:32,582 INFO L225 Difference]: With dead ends: 55797 [2020-12-22 10:24:32,582 INFO L226 Difference]: Without dead ends: 29811 [2020-12-22 10:24:32,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:24:32,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29811 states. [2020-12-22 10:24:34,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29811 to 29811. [2020-12-22 10:24:34,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29811 states. [2020-12-22 10:24:34,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29811 states to 29811 states and 43847 transitions. [2020-12-22 10:24:34,284 INFO L78 Accepts]: Start accepts. Automaton has 29811 states and 43847 transitions. Word has length 109 [2020-12-22 10:24:34,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:34,285 INFO L481 AbstractCegarLoop]: Abstraction has 29811 states and 43847 transitions. [2020-12-22 10:24:34,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:24:34,285 INFO L276 IsEmpty]: Start isEmpty. Operand 29811 states and 43847 transitions. [2020-12-22 10:24:34,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 10:24:34,286 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:34,286 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] [2020-12-22 10:24:34,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:24:34,287 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:34,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:34,287 INFO L82 PathProgramCache]: Analyzing trace with hash 278070463, now seen corresponding path program 1 times [2020-12-22 10:24:34,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:34,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290028494] [2020-12-22 10:24:34,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:34,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:34,608 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 10:24:34,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290028494] [2020-12-22 10:24:34,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:34,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:24:34,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082157238] [2020-12-22 10:24:34,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:24:34,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:34,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:24:34,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:24:34,611 INFO L87 Difference]: Start difference. First operand 29811 states and 43847 transitions. Second operand 8 states. [2020-12-22 10:24:37,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:37,651 INFO L93 Difference]: Finished difference Result 49181 states and 72060 transitions. [2020-12-22 10:24:37,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:24:37,652 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 109 [2020-12-22 10:24:37,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:37,701 INFO L225 Difference]: With dead ends: 49181 [2020-12-22 10:24:37,701 INFO L226 Difference]: Without dead ends: 49179 [2020-12-22 10:24:37,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:24:37,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49179 states. [2020-12-22 10:24:39,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49179 to 30579. [2020-12-22 10:24:39,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30579 states. [2020-12-22 10:24:39,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30579 states to 30579 states and 44487 transitions. [2020-12-22 10:24:39,699 INFO L78 Accepts]: Start accepts. Automaton has 30579 states and 44487 transitions. Word has length 109 [2020-12-22 10:24:39,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:39,699 INFO L481 AbstractCegarLoop]: Abstraction has 30579 states and 44487 transitions. [2020-12-22 10:24:39,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:24:39,699 INFO L276 IsEmpty]: Start isEmpty. Operand 30579 states and 44487 transitions. [2020-12-22 10:24:39,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 10:24:39,701 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:39,702 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] [2020-12-22 10:24:39,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:24:39,702 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:39,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:39,703 INFO L82 PathProgramCache]: Analyzing trace with hash 171324818, now seen corresponding path program 1 times [2020-12-22 10:24:39,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:39,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915121472] [2020-12-22 10:24:39,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:39,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:39,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:24:39,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915121472] [2020-12-22 10:24:39,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:39,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:24:39,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465074504] [2020-12-22 10:24:39,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:24:39,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:39,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:24:39,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:24:39,794 INFO L87 Difference]: Start difference. First operand 30579 states and 44487 transitions. Second operand 3 states. [2020-12-22 10:24:42,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:42,370 INFO L93 Difference]: Finished difference Result 57722 states and 84429 transitions. [2020-12-22 10:24:42,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:24:42,373 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 110 [2020-12-22 10:24:42,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:42,415 INFO L225 Difference]: With dead ends: 57722 [2020-12-22 10:24:42,415 INFO L226 Difference]: Without dead ends: 43127 [2020-12-22 10:24:42,428 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 10:24:42,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43127 states. [2020-12-22 10:24:45,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43127 to 43125. [2020-12-22 10:24:45,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43125 states. [2020-12-22 10:24:45,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43125 states to 43125 states and 62537 transitions. [2020-12-22 10:24:45,512 INFO L78 Accepts]: Start accepts. Automaton has 43125 states and 62537 transitions. Word has length 110 [2020-12-22 10:24:45,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:45,513 INFO L481 AbstractCegarLoop]: Abstraction has 43125 states and 62537 transitions. [2020-12-22 10:24:45,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:24:45,513 INFO L276 IsEmpty]: Start isEmpty. Operand 43125 states and 62537 transitions. [2020-12-22 10:24:45,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:24:45,536 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:45,537 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:24:45,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:24:45,537 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:45,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:45,538 INFO L82 PathProgramCache]: Analyzing trace with hash 45078639, now seen corresponding path program 1 times [2020-12-22 10:24:45,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:45,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499327728] [2020-12-22 10:24:45,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:45,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:45,806 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 10:24:45,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499327728] [2020-12-22 10:24:45,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:45,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:24:45,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145134131] [2020-12-22 10:24:45,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:24:45,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:45,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:24:45,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:24:45,809 INFO L87 Difference]: Start difference. First operand 43125 states and 62537 transitions. Second operand 10 states. [2020-12-22 10:25:07,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:25:07,038 INFO L93 Difference]: Finished difference Result 365063 states and 529874 transitions. [2020-12-22 10:25:07,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:25:07,040 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 148 [2020-12-22 10:25:07,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:25:07,681 INFO L225 Difference]: With dead ends: 365063 [2020-12-22 10:25:07,681 INFO L226 Difference]: Without dead ends: 325765 [2020-12-22 10:25:07,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:25:08,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325765 states. [2020-12-22 10:25:15,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325765 to 82421. [2020-12-22 10:25:15,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82421 states. [2020-12-22 10:25:15,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82421 states to 82421 states and 119241 transitions. [2020-12-22 10:25:15,819 INFO L78 Accepts]: Start accepts. Automaton has 82421 states and 119241 transitions. Word has length 148 [2020-12-22 10:25:15,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:25:15,819 INFO L481 AbstractCegarLoop]: Abstraction has 82421 states and 119241 transitions. [2020-12-22 10:25:15,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:25:15,820 INFO L276 IsEmpty]: Start isEmpty. Operand 82421 states and 119241 transitions. [2020-12-22 10:25:15,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:25:15,853 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:25:15,854 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:25:15,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:25:15,854 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:25:15,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:25:15,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1723704177, now seen corresponding path program 1 times [2020-12-22 10:25:15,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:25:15,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176819325] [2020-12-22 10:25:15,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:25:15,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:25:16,347 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:25:16,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176819325] [2020-12-22 10:25:16,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:25:16,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:25:16,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561758129] [2020-12-22 10:25:16,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:25:16,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:25:16,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:25:16,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:25:16,350 INFO L87 Difference]: Start difference. First operand 82421 states and 119241 transitions. Second operand 10 states. [2020-12-22 10:25:42,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:25:42,346 INFO L93 Difference]: Finished difference Result 404359 states and 586578 transitions. [2020-12-22 10:25:42,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:25:42,347 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 148 [2020-12-22 10:25:42,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:25:43,085 INFO L225 Difference]: With dead ends: 404359 [2020-12-22 10:25:43,086 INFO L226 Difference]: Without dead ends: 365061 [2020-12-22 10:25:43,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:25:43,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365061 states. [2020-12-22 10:25:56,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365061 to 141429. [2020-12-22 10:25:56,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141429 states. [2020-12-22 10:25:56,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141429 states to 141429 states and 203977 transitions. [2020-12-22 10:25:56,825 INFO L78 Accepts]: Start accepts. Automaton has 141429 states and 203977 transitions. Word has length 148 [2020-12-22 10:25:56,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:25:56,826 INFO L481 AbstractCegarLoop]: Abstraction has 141429 states and 203977 transitions. [2020-12-22 10:25:56,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:25:56,826 INFO L276 IsEmpty]: Start isEmpty. Operand 141429 states and 203977 transitions. [2020-12-22 10:25:56,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:25:56,849 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:25:56,850 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:25:56,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:25:56,850 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:25:56,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:25:56,851 INFO L82 PathProgramCache]: Analyzing trace with hash -592064337, now seen corresponding path program 1 times [2020-12-22 10:25:56,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:25:56,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35217674] [2020-12-22 10:25:56,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:25:56,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:25:57,115 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 10:25:57,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35217674] [2020-12-22 10:25:57,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:25:57,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:25:57,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980656325] [2020-12-22 10:25:57,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:25:57,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:25:57,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:25:57,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:25:57,117 INFO L87 Difference]: Start difference. First operand 141429 states and 203977 transitions. Second operand 10 states. [2020-12-22 10:26:28,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:28,539 INFO L93 Difference]: Finished difference Result 443655 states and 643282 transitions. [2020-12-22 10:26:28,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:26:28,540 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 148 [2020-12-22 10:26:28,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:29,345 INFO L225 Difference]: With dead ends: 443655 [2020-12-22 10:26:29,345 INFO L226 Difference]: Without dead ends: 404357 [2020-12-22 10:26:29,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:26:29,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404357 states. [2020-12-22 10:26:46,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404357 to 180725. [2020-12-22 10:26:46,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180725 states. [2020-12-22 10:26:47,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180725 states to 180725 states and 260681 transitions. [2020-12-22 10:26:47,238 INFO L78 Accepts]: Start accepts. Automaton has 180725 states and 260681 transitions. Word has length 148 [2020-12-22 10:26:47,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:47,239 INFO L481 AbstractCegarLoop]: Abstraction has 180725 states and 260681 transitions. [2020-12-22 10:26:47,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:26:47,239 INFO L276 IsEmpty]: Start isEmpty. Operand 180725 states and 260681 transitions. [2020-12-22 10:26:47,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:26:47,270 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:47,270 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:26:47,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:26:47,271 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:47,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:47,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1827523377, now seen corresponding path program 1 times [2020-12-22 10:26:47,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:47,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337360058] [2020-12-22 10:26:47,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:47,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:47,560 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:26:47,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337360058] [2020-12-22 10:26:47,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:47,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:26:47,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056783602] [2020-12-22 10:26:47,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:26:47,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:47,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:26:47,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:26:47,563 INFO L87 Difference]: Start difference. First operand 180725 states and 260681 transitions. Second operand 10 states.