/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 01:55:51,611 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 01:55:51,614 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 01:55:51,658 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-07 01:55:51,694 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 01:55:51,697 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 01:55:51,699 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 01:55:51,702 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 01:55:51,703 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 01:55:51,707 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 01:55:51,714 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 01:55:51,723 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 01:55:51,726 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 01:55:51,728 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 01:55:51,730 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 01:55:51,733 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 01:55:51,743 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 01:55:51,758 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 01:55:51,759 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 01:55:51,760 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 01:55:51,762 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 01:55:51,788 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 01:55:51,788 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 01:55:51,793 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 01:55:51,794 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 01:55:51,794 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 01:55:51,794 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 01:55:51,794 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 01:55:51,795 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 01:55:51,795 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 01:55:51,795 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 01:55:51,797 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 01:55:51,797 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 01:55:51,798 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 01:55:51,798 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 01:55:51,799 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 01:55:51,799 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 01:55:51,799 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 01:55:51,799 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 01:55:51,800 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 01:55:51,800 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 01:55:51,800 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 01:55:51,801 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 01:55:51,801 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 01:55:52,262 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 01:55:52,308 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 01:55:52,311 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 01:55:52,313 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 01:55:52,314 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 01:55:52,315 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2020-11-07 01:55:52,419 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/851bca869/9e89f7bec287422ca94700245ee7ed15/FLAGd8f9dfaba [2020-11-07 01:55:53,093 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 01:55:53,093 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2020-11-07 01:55:53,105 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/851bca869/9e89f7bec287422ca94700245ee7ed15/FLAGd8f9dfaba [2020-11-07 01:55:53,456 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/851bca869/9e89f7bec287422ca94700245ee7ed15 [2020-11-07 01:55:53,459 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 01:55:53,470 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 01:55:53,477 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 01:55:53,477 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 01:55:53,481 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 01:55:53,482 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:55:53" (1/1) ... [2020-11-07 01:55:53,487 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69423f55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:53, skipping insertion in model container [2020-11-07 01:55:53,487 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:55:53" (1/1) ... [2020-11-07 01:55:53,496 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 01:55:53,517 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 01:55:53,701 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 01:55:53,712 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 01:55:53,737 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 01:55:53,760 INFO L208 MainTranslator]: Completed translation [2020-11-07 01:55:53,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:53 WrapperNode [2020-11-07 01:55:53,760 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 01:55:53,762 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 01:55:53,762 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 01:55:53,762 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 01:55:53,778 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:53" (1/1) ... [2020-11-07 01:55:53,779 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:53" (1/1) ... [2020-11-07 01:55:53,789 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:53" (1/1) ... [2020-11-07 01:55:53,789 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:53" (1/1) ... [2020-11-07 01:55:53,800 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:53" (1/1) ... [2020-11-07 01:55:53,806 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:53" (1/1) ... [2020-11-07 01:55:53,808 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:53" (1/1) ... [2020-11-07 01:55:53,811 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 01:55:53,813 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 01:55:53,813 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 01:55:53,813 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 01:55:53,814 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:53" (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 [2020-11-07 01:55:53,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 01:55:53,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 01:55:53,912 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 01:55:53,912 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 01:55:53,912 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-11-07 01:55:53,913 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 01:55:53,913 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-07 01:55:53,913 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 01:55:53,913 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 01:55:53,914 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-07 01:55:53,914 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-07 01:55:53,914 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 01:55:53,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 01:55:53,915 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 01:55:53,915 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-11-07 01:55:53,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-07 01:55:53,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-07 01:55:53,915 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 01:55:53,916 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-07 01:55:53,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 01:55:53,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 01:55:53,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 01:55:53,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 01:55:53,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 01:55:53,917 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 01:55:54,631 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 01:55:54,632 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-11-07 01:55:54,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:55:54 BoogieIcfgContainer [2020-11-07 01:55:54,635 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 01:55:54,639 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 01:55:54,639 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 01:55:54,643 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 01:55:54,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:55:53" (1/3) ... [2020-11-07 01:55:54,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ade841c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:55:54, skipping insertion in model container [2020-11-07 01:55:54,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:53" (2/3) ... [2020-11-07 01:55:54,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ade841c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:55:54, skipping insertion in model container [2020-11-07 01:55:54,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:55:54" (3/3) ... [2020-11-07 01:55:54,648 INFO L111 eAbstractionObserver]: Analyzing ICFG array_of_struct_ptr_flag_init.i [2020-11-07 01:55:54,669 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 01:55:54,675 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 01:55:54,690 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 01:55:54,732 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 01:55:54,732 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 01:55:54,732 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 01:55:54,732 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 01:55:54,733 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 01:55:54,733 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 01:55:54,733 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 01:55:54,733 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 01:55:54,762 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2020-11-07 01:55:54,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-07 01:55:54,779 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:55:54,780 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:55:54,780 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:55:54,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:55:54,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1175551776, now seen corresponding path program 1 times [2020-11-07 01:55:54,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:55:54,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1986907735] [2020-11-07 01:55:54,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:55:54,903 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:55:55,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:55:55,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:55:55,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:55:55,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:55:55,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:55:55,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:55:55,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1986907735] [2020-11-07 01:55:55,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:55:55,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 01:55:55,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819284601] [2020-11-07 01:55:55,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 01:55:55,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:55:55,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 01:55:55,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-07 01:55:55,320 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 5 states. [2020-11-07 01:55:55,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:55:55,669 INFO L93 Difference]: Finished difference Result 121 states and 149 transitions. [2020-11-07 01:55:55,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 01:55:55,671 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-11-07 01:55:55,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:55:55,684 INFO L225 Difference]: With dead ends: 121 [2020-11-07 01:55:55,685 INFO L226 Difference]: Without dead ends: 74 [2020-11-07 01:55:55,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-07 01:55:55,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-07 01:55:55,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 56. [2020-11-07 01:55:55,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-11-07 01:55:55,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-11-07 01:55:55,753 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 35 [2020-11-07 01:55:55,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:55:55,754 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-11-07 01:55:55,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 01:55:55,754 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-11-07 01:55:55,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-07 01:55:55,756 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:55:55,756 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] [2020-11-07 01:55:55,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 01:55:55,757 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:55:55,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:55:55,758 INFO L82 PathProgramCache]: Analyzing trace with hash -69019303, now seen corresponding path program 1 times [2020-11-07 01:55:55,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:55:55,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1795027273] [2020-11-07 01:55:55,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:55:55,829 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:55:55,832 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:55:55,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:55:55,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:55:55,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:55:56,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:55:56,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:55:56,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:55:56,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1795027273] [2020-11-07 01:55:56,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:55:56,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-07 01:55:56,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159054705] [2020-11-07 01:55:56,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 01:55:56,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:55:56,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 01:55:56,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-07 01:55:56,045 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 7 states. [2020-11-07 01:55:56,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:55:56,441 INFO L93 Difference]: Finished difference Result 100 states and 111 transitions. [2020-11-07 01:55:56,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-07 01:55:56,441 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-11-07 01:55:56,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:55:56,444 INFO L225 Difference]: With dead ends: 100 [2020-11-07 01:55:56,444 INFO L226 Difference]: Without dead ends: 83 [2020-11-07 01:55:56,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-11-07 01:55:56,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-07 01:55:56,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 65. [2020-11-07 01:55:56,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-07 01:55:56,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2020-11-07 01:55:56,462 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 42 [2020-11-07 01:55:56,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:55:56,463 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2020-11-07 01:55:56,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 01:55:56,463 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2020-11-07 01:55:56,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-11-07 01:55:56,465 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:55:56,466 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-11-07 01:55:56,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 01:55:56,466 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:55:56,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:55:56,467 INFO L82 PathProgramCache]: Analyzing trace with hash -532040000, now seen corresponding path program 2 times [2020-11-07 01:55:56,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:55:56,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322495510] [2020-11-07 01:55:56,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:55:56,538 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:55:56,540 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:55:56,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:55:56,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:55:56,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:55:56,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:55:56,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:55:56,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:55:56,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1322495510] [2020-11-07 01:55:56,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:55:56,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-07 01:55:56,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391883162] [2020-11-07 01:55:56,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 01:55:56,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:55:56,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 01:55:56,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-07 01:55:56,746 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand 7 states. [2020-11-07 01:55:57,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:55:57,089 INFO L93 Difference]: Finished difference Result 109 states and 119 transitions. [2020-11-07 01:55:57,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-07 01:55:57,089 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 49 [2020-11-07 01:55:57,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:55:57,091 INFO L225 Difference]: With dead ends: 109 [2020-11-07 01:55:57,091 INFO L226 Difference]: Without dead ends: 70 [2020-11-07 01:55:57,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-11-07 01:55:57,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-11-07 01:55:57,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2020-11-07 01:55:57,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-07 01:55:57,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2020-11-07 01:55:57,108 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 49 [2020-11-07 01:55:57,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:55:57,109 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2020-11-07 01:55:57,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 01:55:57,110 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2020-11-07 01:55:57,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-11-07 01:55:57,112 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:55:57,113 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-11-07 01:55:57,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 01:55:57,113 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:55:57,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:55:57,116 INFO L82 PathProgramCache]: Analyzing trace with hash -661502084, now seen corresponding path program 1 times [2020-11-07 01:55:57,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:55:57,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [109584789] [2020-11-07 01:55:57,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:55:57,203 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:55:57,205 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:55:57,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:55:57,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:55:57,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:55:57,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:55:57,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:55:57,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:55:57,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [109584789] [2020-11-07 01:55:57,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:55:57,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-07 01:55:57,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914997282] [2020-11-07 01:55:57,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 01:55:57,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:55:57,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 01:55:57,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-11-07 01:55:57,508 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 9 states. [2020-11-07 01:55:57,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:55:57,949 INFO L93 Difference]: Finished difference Result 115 states and 125 transitions. [2020-11-07 01:55:57,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-07 01:55:57,950 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2020-11-07 01:55:57,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:55:57,952 INFO L225 Difference]: With dead ends: 115 [2020-11-07 01:55:57,952 INFO L226 Difference]: Without dead ends: 76 [2020-11-07 01:55:57,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-11-07 01:55:57,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-11-07 01:55:57,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2020-11-07 01:55:57,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-11-07 01:55:57,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2020-11-07 01:55:57,975 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 55 [2020-11-07 01:55:57,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:55:57,975 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2020-11-07 01:55:57,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 01:55:57,975 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2020-11-07 01:55:57,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-07 01:55:57,979 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:55:57,981 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-11-07 01:55:57,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 01:55:57,982 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:55:57,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:55:57,983 INFO L82 PathProgramCache]: Analyzing trace with hash -717071560, now seen corresponding path program 2 times [2020-11-07 01:55:57,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:55:57,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647031129] [2020-11-07 01:55:57,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:55:58,183 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:55:58,186 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:55:58,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:55:58,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:55:58,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:55:58,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:55:58,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:55:58,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:55:58,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647031129] [2020-11-07 01:55:58,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:55:58,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-11-07 01:55:58,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318916713] [2020-11-07 01:55:58,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-07 01:55:58,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:55:58,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-07 01:55:58,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-11-07 01:55:58,578 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand 11 states. [2020-11-07 01:55:59,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:55:59,130 INFO L93 Difference]: Finished difference Result 121 states and 131 transitions. [2020-11-07 01:55:59,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-07 01:55:59,130 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2020-11-07 01:55:59,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:55:59,132 INFO L225 Difference]: With dead ends: 121 [2020-11-07 01:55:59,132 INFO L226 Difference]: Without dead ends: 82 [2020-11-07 01:55:59,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-11-07 01:55:59,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-11-07 01:55:59,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2020-11-07 01:55:59,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-07 01:55:59,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2020-11-07 01:55:59,171 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 61 [2020-11-07 01:55:59,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:55:59,172 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2020-11-07 01:55:59,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-07 01:55:59,172 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2020-11-07 01:55:59,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-11-07 01:55:59,176 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:55:59,176 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2020-11-07 01:55:59,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 01:55:59,177 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:55:59,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:55:59,177 INFO L82 PathProgramCache]: Analyzing trace with hash 2104209908, now seen corresponding path program 3 times [2020-11-07 01:55:59,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:55:59,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37826202] [2020-11-07 01:55:59,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:55:59,369 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:55:59,371 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:55:59,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:55:59,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:55:59,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:55:59,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:55:59,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:55:59,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:55:59,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37826202] [2020-11-07 01:55:59,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:55:59,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-11-07 01:55:59,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754103929] [2020-11-07 01:55:59,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-07 01:55:59,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:55:59,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-07 01:55:59,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-11-07 01:55:59,893 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 13 states. [2020-11-07 01:56:00,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:56:00,496 INFO L93 Difference]: Finished difference Result 127 states and 137 transitions. [2020-11-07 01:56:00,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-07 01:56:00,496 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 67 [2020-11-07 01:56:00,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:56:00,501 INFO L225 Difference]: With dead ends: 127 [2020-11-07 01:56:00,501 INFO L226 Difference]: Without dead ends: 88 [2020-11-07 01:56:00,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2020-11-07 01:56:00,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-11-07 01:56:00,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2020-11-07 01:56:00,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-11-07 01:56:00,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2020-11-07 01:56:00,537 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 67 [2020-11-07 01:56:00,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:56:00,538 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2020-11-07 01:56:00,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-07 01:56:00,538 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2020-11-07 01:56:00,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-11-07 01:56:00,543 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:56:00,543 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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] [2020-11-07 01:56:00,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 01:56:00,544 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:56:00,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:56:00,545 INFO L82 PathProgramCache]: Analyzing trace with hash -741340240, now seen corresponding path program 4 times [2020-11-07 01:56:00,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:56:00,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087122645] [2020-11-07 01:56:00,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:56:00,720 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:56:00,722 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:56:00,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:00,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:56:00,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:00,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:56:00,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:01,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:56:01,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087122645] [2020-11-07 01:56:01,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:56:01,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-11-07 01:56:01,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205025557] [2020-11-07 01:56:01,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-07 01:56:01,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:56:01,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-07 01:56:01,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-11-07 01:56:01,392 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand 15 states. [2020-11-07 01:56:02,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:56:02,074 INFO L93 Difference]: Finished difference Result 133 states and 143 transitions. [2020-11-07 01:56:02,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-07 01:56:02,075 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-11-07 01:56:02,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:56:02,077 INFO L225 Difference]: With dead ends: 133 [2020-11-07 01:56:02,077 INFO L226 Difference]: Without dead ends: 94 [2020-11-07 01:56:02,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2020-11-07 01:56:02,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-11-07 01:56:02,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2020-11-07 01:56:02,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-11-07 01:56:02,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2020-11-07 01:56:02,094 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 73 [2020-11-07 01:56:02,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:56:02,095 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2020-11-07 01:56:02,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-07 01:56:02,095 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2020-11-07 01:56:02,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-11-07 01:56:02,097 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:56:02,097 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 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] [2020-11-07 01:56:02,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 01:56:02,098 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:56:02,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:56:02,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1293866900, now seen corresponding path program 5 times [2020-11-07 01:56:02,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:56:02,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1697321315] [2020-11-07 01:56:02,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:56:02,259 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:56:02,262 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:56:02,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:02,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:56:02,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:02,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:56:02,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:02,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:56:02,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1697321315] [2020-11-07 01:56:02,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:56:02,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-11-07 01:56:02,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369081542] [2020-11-07 01:56:02,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-07 01:56:02,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:56:02,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-07 01:56:02,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-11-07 01:56:02,939 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand 17 states. [2020-11-07 01:56:03,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:56:03,755 INFO L93 Difference]: Finished difference Result 139 states and 149 transitions. [2020-11-07 01:56:03,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-07 01:56:03,756 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 79 [2020-11-07 01:56:03,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:56:03,758 INFO L225 Difference]: With dead ends: 139 [2020-11-07 01:56:03,758 INFO L226 Difference]: Without dead ends: 100 [2020-11-07 01:56:03,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2020-11-07 01:56:03,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-11-07 01:56:03,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2020-11-07 01:56:03,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-11-07 01:56:03,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2020-11-07 01:56:03,791 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 79 [2020-11-07 01:56:03,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:56:03,792 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2020-11-07 01:56:03,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-07 01:56:03,793 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2020-11-07 01:56:03,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-11-07 01:56:03,796 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:56:03,796 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 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] [2020-11-07 01:56:03,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 01:56:03,797 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:56:03,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:56:03,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1220593704, now seen corresponding path program 6 times [2020-11-07 01:56:03,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:56:03,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991908327] [2020-11-07 01:56:03,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:56:03,975 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:56:03,976 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:56:03,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:04,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:56:04,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:04,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:56:04,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:04,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:56:04,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991908327] [2020-11-07 01:56:04,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:56:04,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-11-07 01:56:04,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068548395] [2020-11-07 01:56:04,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-07 01:56:04,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:56:04,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-07 01:56:04,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-11-07 01:56:04,862 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand 19 states. [2020-11-07 01:56:05,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:56:05,765 INFO L93 Difference]: Finished difference Result 145 states and 155 transitions. [2020-11-07 01:56:05,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-07 01:56:05,765 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 85 [2020-11-07 01:56:05,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:56:05,767 INFO L225 Difference]: With dead ends: 145 [2020-11-07 01:56:05,767 INFO L226 Difference]: Without dead ends: 106 [2020-11-07 01:56:05,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2020-11-07 01:56:05,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-11-07 01:56:05,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2020-11-07 01:56:05,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-11-07 01:56:05,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 107 transitions. [2020-11-07 01:56:05,786 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 107 transitions. Word has length 85 [2020-11-07 01:56:05,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:56:05,788 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 107 transitions. [2020-11-07 01:56:05,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-07 01:56:05,788 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 107 transitions. [2020-11-07 01:56:05,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-07 01:56:05,791 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:56:05,791 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 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] [2020-11-07 01:56:05,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-07 01:56:05,791 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:56:05,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:56:05,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1824478492, now seen corresponding path program 7 times [2020-11-07 01:56:05,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:56:05,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574067999] [2020-11-07 01:56:05,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:56:05,956 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:56:05,957 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:56:05,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:06,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:56:06,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:06,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:56:06,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:06,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:56:06,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574067999] [2020-11-07 01:56:06,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:56:06,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2020-11-07 01:56:06,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682227992] [2020-11-07 01:56:06,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-07 01:56:06,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:56:06,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-07 01:56:06,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2020-11-07 01:56:06,848 INFO L87 Difference]: Start difference. First operand 102 states and 107 transitions. Second operand 21 states. [2020-11-07 01:56:07,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:56:07,878 INFO L93 Difference]: Finished difference Result 151 states and 161 transitions. [2020-11-07 01:56:07,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-07 01:56:07,879 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 91 [2020-11-07 01:56:07,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:56:07,881 INFO L225 Difference]: With dead ends: 151 [2020-11-07 01:56:07,881 INFO L226 Difference]: Without dead ends: 112 [2020-11-07 01:56:07,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=413, Invalid=1069, Unknown=0, NotChecked=0, Total=1482 [2020-11-07 01:56:07,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-11-07 01:56:07,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2020-11-07 01:56:07,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-11-07 01:56:07,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 113 transitions. [2020-11-07 01:56:07,919 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 113 transitions. Word has length 91 [2020-11-07 01:56:07,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:56:07,920 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 113 transitions. [2020-11-07 01:56:07,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-07 01:56:07,922 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 113 transitions. [2020-11-07 01:56:07,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-11-07 01:56:07,924 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:56:07,924 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 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] [2020-11-07 01:56:07,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-07 01:56:07,924 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:56:07,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:56:07,926 INFO L82 PathProgramCache]: Analyzing trace with hash -605908832, now seen corresponding path program 8 times [2020-11-07 01:56:07,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:56:07,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1533137164] [2020-11-07 01:56:07,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:56:08,098 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:56:08,103 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:56:08,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:08,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:56:08,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:08,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:56:08,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:09,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:56:09,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1533137164] [2020-11-07 01:56:09,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:56:09,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-11-07 01:56:09,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084838018] [2020-11-07 01:56:09,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-07 01:56:09,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:56:09,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-07 01:56:09,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2020-11-07 01:56:09,166 INFO L87 Difference]: Start difference. First operand 108 states and 113 transitions. Second operand 23 states. [2020-11-07 01:56:10,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:56:10,340 INFO L93 Difference]: Finished difference Result 157 states and 167 transitions. [2020-11-07 01:56:10,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-07 01:56:10,341 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 97 [2020-11-07 01:56:10,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:56:10,342 INFO L225 Difference]: With dead ends: 157 [2020-11-07 01:56:10,342 INFO L226 Difference]: Without dead ends: 118 [2020-11-07 01:56:10,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=507, Invalid=1299, Unknown=0, NotChecked=0, Total=1806 [2020-11-07 01:56:10,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-11-07 01:56:10,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2020-11-07 01:56:10,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-11-07 01:56:10,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 119 transitions. [2020-11-07 01:56:10,361 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 119 transitions. Word has length 97 [2020-11-07 01:56:10,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:56:10,361 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 119 transitions. [2020-11-07 01:56:10,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-07 01:56:10,362 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 119 transitions. [2020-11-07 01:56:10,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-11-07 01:56:10,363 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:56:10,363 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 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] [2020-11-07 01:56:10,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-07 01:56:10,364 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:56:10,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:56:10,364 INFO L82 PathProgramCache]: Analyzing trace with hash 869808476, now seen corresponding path program 9 times [2020-11-07 01:56:10,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:56:10,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870145109] [2020-11-07 01:56:10,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:56:10,532 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:56:10,533 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:56:10,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:10,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:56:10,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:10,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:56:10,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:11,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:56:11,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [870145109] [2020-11-07 01:56:11,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:56:11,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2020-11-07 01:56:11,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342825667] [2020-11-07 01:56:11,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-07 01:56:11,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:56:11,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-07 01:56:11,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2020-11-07 01:56:11,713 INFO L87 Difference]: Start difference. First operand 114 states and 119 transitions. Second operand 25 states. [2020-11-07 01:56:12,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:56:12,955 INFO L93 Difference]: Finished difference Result 163 states and 173 transitions. [2020-11-07 01:56:12,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-07 01:56:12,955 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 103 [2020-11-07 01:56:12,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:56:12,956 INFO L225 Difference]: With dead ends: 163 [2020-11-07 01:56:12,956 INFO L226 Difference]: Without dead ends: 124 [2020-11-07 01:56:12,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=611, Invalid=1551, Unknown=0, NotChecked=0, Total=2162 [2020-11-07 01:56:12,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-11-07 01:56:12,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2020-11-07 01:56:12,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-11-07 01:56:12,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 125 transitions. [2020-11-07 01:56:12,972 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 125 transitions. Word has length 103 [2020-11-07 01:56:12,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:56:12,972 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 125 transitions. [2020-11-07 01:56:12,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-07 01:56:12,972 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 125 transitions. [2020-11-07 01:56:12,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-11-07 01:56:12,973 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:56:12,974 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 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] [2020-11-07 01:56:12,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-07 01:56:12,974 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:56:12,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:56:12,975 INFO L82 PathProgramCache]: Analyzing trace with hash -268212968, now seen corresponding path program 10 times [2020-11-07 01:56:12,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:56:12,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675197702] [2020-11-07 01:56:12,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:56:13,137 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:56:13,139 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:56:13,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:13,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:56:13,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:13,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:56:13,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:14,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:56:14,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675197702] [2020-11-07 01:56:14,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:56:14,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2020-11-07 01:56:14,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873825494] [2020-11-07 01:56:14,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-07 01:56:14,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:56:14,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-07 01:56:14,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=530, Unknown=0, NotChecked=0, Total=702 [2020-11-07 01:56:14,427 INFO L87 Difference]: Start difference. First operand 120 states and 125 transitions. Second operand 27 states. [2020-11-07 01:56:15,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:56:15,965 INFO L93 Difference]: Finished difference Result 169 states and 179 transitions. [2020-11-07 01:56:15,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-07 01:56:15,966 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 109 [2020-11-07 01:56:15,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:56:15,968 INFO L225 Difference]: With dead ends: 169 [2020-11-07 01:56:15,968 INFO L226 Difference]: Without dead ends: 130 [2020-11-07 01:56:15,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=725, Invalid=1825, Unknown=0, NotChecked=0, Total=2550 [2020-11-07 01:56:15,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-11-07 01:56:15,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2020-11-07 01:56:15,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-11-07 01:56:15,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 131 transitions. [2020-11-07 01:56:15,993 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 131 transitions. Word has length 109 [2020-11-07 01:56:15,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:56:15,994 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 131 transitions. [2020-11-07 01:56:15,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-07 01:56:15,994 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 131 transitions. [2020-11-07 01:56:15,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-11-07 01:56:15,995 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:56:15,995 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 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] [2020-11-07 01:56:15,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-07 01:56:15,996 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:56:15,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:56:15,996 INFO L82 PathProgramCache]: Analyzing trace with hash 620090324, now seen corresponding path program 11 times [2020-11-07 01:56:15,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:56:15,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981829445] [2020-11-07 01:56:15,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:56:16,172 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:56:16,175 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:56:16,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:16,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:56:16,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:16,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:56:16,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:17,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:56:17,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981829445] [2020-11-07 01:56:17,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:56:17,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2020-11-07 01:56:17,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625198137] [2020-11-07 01:56:17,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-07 01:56:17,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:56:17,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-07 01:56:17,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2020-11-07 01:56:17,638 INFO L87 Difference]: Start difference. First operand 126 states and 131 transitions. Second operand 29 states. [2020-11-07 01:56:19,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:56:19,224 INFO L93 Difference]: Finished difference Result 175 states and 185 transitions. [2020-11-07 01:56:19,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-07 01:56:19,225 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 115 [2020-11-07 01:56:19,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:56:19,227 INFO L225 Difference]: With dead ends: 175 [2020-11-07 01:56:19,227 INFO L226 Difference]: Without dead ends: 136 [2020-11-07 01:56:19,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=849, Invalid=2121, Unknown=0, NotChecked=0, Total=2970 [2020-11-07 01:56:19,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-11-07 01:56:19,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2020-11-07 01:56:19,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-11-07 01:56:19,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 137 transitions. [2020-11-07 01:56:19,243 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 137 transitions. Word has length 115 [2020-11-07 01:56:19,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:56:19,244 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 137 transitions. [2020-11-07 01:56:19,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-07 01:56:19,244 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 137 transitions. [2020-11-07 01:56:19,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-07 01:56:19,245 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:56:19,245 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 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] [2020-11-07 01:56:19,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-07 01:56:19,245 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:56:19,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:56:19,246 INFO L82 PathProgramCache]: Analyzing trace with hash 586237328, now seen corresponding path program 12 times [2020-11-07 01:56:19,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:56:19,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1567944632] [2020-11-07 01:56:19,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:56:19,411 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:56:19,413 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:56:19,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:19,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:56:19,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:19,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:56:19,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:21,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:56:21,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1567944632] [2020-11-07 01:56:21,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:56:21,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2020-11-07 01:56:21,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691689736] [2020-11-07 01:56:21,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-07 01:56:21,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:56:21,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-07 01:56:21,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=702, Unknown=0, NotChecked=0, Total=930 [2020-11-07 01:56:21,040 INFO L87 Difference]: Start difference. First operand 132 states and 137 transitions. Second operand 31 states. [2020-11-07 01:56:22,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:56:22,861 INFO L93 Difference]: Finished difference Result 181 states and 191 transitions. [2020-11-07 01:56:22,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-07 01:56:22,862 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 121 [2020-11-07 01:56:22,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:56:22,863 INFO L225 Difference]: With dead ends: 181 [2020-11-07 01:56:22,864 INFO L226 Difference]: Without dead ends: 142 [2020-11-07 01:56:22,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=983, Invalid=2439, Unknown=0, NotChecked=0, Total=3422 [2020-11-07 01:56:22,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-11-07 01:56:22,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 138. [2020-11-07 01:56:22,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-11-07 01:56:22,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 143 transitions. [2020-11-07 01:56:22,894 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 143 transitions. Word has length 121 [2020-11-07 01:56:22,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:56:22,894 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 143 transitions. [2020-11-07 01:56:22,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-07 01:56:22,894 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 143 transitions. [2020-11-07 01:56:22,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-11-07 01:56:22,895 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:56:22,895 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 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] [2020-11-07 01:56:22,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-07 01:56:22,896 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:56:22,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:56:22,896 INFO L82 PathProgramCache]: Analyzing trace with hash -236488116, now seen corresponding path program 13 times [2020-11-07 01:56:22,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:56:22,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749016856] [2020-11-07 01:56:22,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:56:23,065 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:56:23,067 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:56:23,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:23,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:56:23,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:23,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:56:23,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:24,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:56:24,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749016856] [2020-11-07 01:56:24,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:56:24,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2020-11-07 01:56:24,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690546234] [2020-11-07 01:56:24,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-11-07 01:56:24,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:56:24,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-11-07 01:56:24,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=797, Unknown=0, NotChecked=0, Total=1056 [2020-11-07 01:56:24,913 INFO L87 Difference]: Start difference. First operand 138 states and 143 transitions. Second operand 33 states. [2020-11-07 01:56:26,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:56:26,775 INFO L93 Difference]: Finished difference Result 187 states and 197 transitions. [2020-11-07 01:56:26,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-07 01:56:26,776 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 127 [2020-11-07 01:56:26,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:56:26,778 INFO L225 Difference]: With dead ends: 187 [2020-11-07 01:56:26,778 INFO L226 Difference]: Without dead ends: 148 [2020-11-07 01:56:26,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1127, Invalid=2779, Unknown=0, NotChecked=0, Total=3906 [2020-11-07 01:56:26,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-11-07 01:56:26,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2020-11-07 01:56:26,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-11-07 01:56:26,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 149 transitions. [2020-11-07 01:56:26,796 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 149 transitions. Word has length 127 [2020-11-07 01:56:26,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:56:26,797 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 149 transitions. [2020-11-07 01:56:26,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-11-07 01:56:26,797 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 149 transitions. [2020-11-07 01:56:26,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-11-07 01:56:26,798 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:56:26,798 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 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] [2020-11-07 01:56:26,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-07 01:56:26,798 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:56:26,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:56:26,799 INFO L82 PathProgramCache]: Analyzing trace with hash -847629816, now seen corresponding path program 14 times [2020-11-07 01:56:26,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:56:26,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028840584] [2020-11-07 01:56:26,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:56:26,963 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:56:26,965 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:56:26,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:27,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:56:27,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:27,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:56:27,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:28,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:56:28,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028840584] [2020-11-07 01:56:28,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:56:28,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2020-11-07 01:56:28,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651842352] [2020-11-07 01:56:28,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-07 01:56:28,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:56:28,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-07 01:56:28,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2020-11-07 01:56:28,893 INFO L87 Difference]: Start difference. First operand 144 states and 149 transitions. Second operand 35 states. [2020-11-07 01:56:31,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:56:31,347 INFO L93 Difference]: Finished difference Result 193 states and 203 transitions. [2020-11-07 01:56:31,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-11-07 01:56:31,347 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 133 [2020-11-07 01:56:31,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:56:31,349 INFO L225 Difference]: With dead ends: 193 [2020-11-07 01:56:31,349 INFO L226 Difference]: Without dead ends: 154 [2020-11-07 01:56:31,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1281, Invalid=3141, Unknown=0, NotChecked=0, Total=4422 [2020-11-07 01:56:31,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-11-07 01:56:31,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2020-11-07 01:56:31,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-11-07 01:56:31,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 155 transitions. [2020-11-07 01:56:31,369 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 155 transitions. Word has length 133 [2020-11-07 01:56:31,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:56:31,370 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 155 transitions. [2020-11-07 01:56:31,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-07 01:56:31,370 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 155 transitions. [2020-11-07 01:56:31,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-11-07 01:56:31,372 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:56:31,372 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 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] [2020-11-07 01:56:31,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-11-07 01:56:31,372 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:56:31,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:56:31,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1594151740, now seen corresponding path program 15 times [2020-11-07 01:56:31,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:56:31,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349620057] [2020-11-07 01:56:31,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:56:31,557 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:56:31,558 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:56:31,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:31,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:56:31,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:31,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:56:31,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:33,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:56:33,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349620057] [2020-11-07 01:56:33,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:56:33,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2020-11-07 01:56:33,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616435280] [2020-11-07 01:56:33,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-07 01:56:33,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:56:33,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-07 01:56:33,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2020-11-07 01:56:33,686 INFO L87 Difference]: Start difference. First operand 150 states and 155 transitions. Second operand 37 states. [2020-11-07 01:56:36,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:56:36,297 INFO L93 Difference]: Finished difference Result 199 states and 209 transitions. [2020-11-07 01:56:36,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-11-07 01:56:36,298 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 139 [2020-11-07 01:56:36,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:56:36,300 INFO L225 Difference]: With dead ends: 199 [2020-11-07 01:56:36,300 INFO L226 Difference]: Without dead ends: 160 [2020-11-07 01:56:36,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1445, Invalid=3525, Unknown=0, NotChecked=0, Total=4970 [2020-11-07 01:56:36,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-11-07 01:56:36,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2020-11-07 01:56:36,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-11-07 01:56:36,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 161 transitions. [2020-11-07 01:56:36,325 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 161 transitions. Word has length 139 [2020-11-07 01:56:36,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:56:36,325 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 161 transitions. [2020-11-07 01:56:36,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-11-07 01:56:36,326 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 161 transitions. [2020-11-07 01:56:36,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-11-07 01:56:36,327 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:56:36,327 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 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] [2020-11-07 01:56:36,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-11-07 01:56:36,328 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:56:36,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:56:36,328 INFO L82 PathProgramCache]: Analyzing trace with hash -2090063232, now seen corresponding path program 16 times [2020-11-07 01:56:36,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:56:36,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8159639] [2020-11-07 01:56:36,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:56:36,495 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:56:36,496 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:56:36,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:36,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:56:36,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:36,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:56:36,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:38,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:56:38,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8159639] [2020-11-07 01:56:38,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:56:38,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2020-11-07 01:56:38,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619073060] [2020-11-07 01:56:38,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-11-07 01:56:38,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:56:38,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-11-07 01:56:38,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=1118, Unknown=0, NotChecked=0, Total=1482 [2020-11-07 01:56:38,819 INFO L87 Difference]: Start difference. First operand 156 states and 161 transitions. Second operand 39 states. [2020-11-07 01:56:41,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:56:41,397 INFO L93 Difference]: Finished difference Result 205 states and 215 transitions. [2020-11-07 01:56:41,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-11-07 01:56:41,398 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 145 [2020-11-07 01:56:41,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:56:41,399 INFO L225 Difference]: With dead ends: 205 [2020-11-07 01:56:41,400 INFO L226 Difference]: Without dead ends: 166 [2020-11-07 01:56:41,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1619, Invalid=3931, Unknown=0, NotChecked=0, Total=5550 [2020-11-07 01:56:41,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-11-07 01:56:41,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 162. [2020-11-07 01:56:41,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-11-07 01:56:41,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 167 transitions. [2020-11-07 01:56:41,421 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 167 transitions. Word has length 145 [2020-11-07 01:56:41,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:56:41,422 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 167 transitions. [2020-11-07 01:56:41,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-11-07 01:56:41,422 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 167 transitions. [2020-11-07 01:56:41,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-11-07 01:56:41,423 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:56:41,423 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 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] [2020-11-07 01:56:41,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-11-07 01:56:41,424 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:56:41,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:56:41,424 INFO L82 PathProgramCache]: Analyzing trace with hash 863955772, now seen corresponding path program 17 times [2020-11-07 01:56:41,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:56:41,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988157881] [2020-11-07 01:56:41,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:56:41,596 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:56:41,597 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:56:41,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:41,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:56:41,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:41,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:56:41,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:44,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:56:44,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988157881] [2020-11-07 01:56:44,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:56:44,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2020-11-07 01:56:44,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695623209] [2020-11-07 01:56:44,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-11-07 01:56:44,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:56:44,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-11-07 01:56:44,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=1237, Unknown=0, NotChecked=0, Total=1640 [2020-11-07 01:56:44,123 INFO L87 Difference]: Start difference. First operand 162 states and 167 transitions. Second operand 41 states. [2020-11-07 01:56:46,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:56:46,810 INFO L93 Difference]: Finished difference Result 211 states and 221 transitions. [2020-11-07 01:56:46,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-11-07 01:56:46,810 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 151 [2020-11-07 01:56:46,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:56:46,812 INFO L225 Difference]: With dead ends: 211 [2020-11-07 01:56:46,812 INFO L226 Difference]: Without dead ends: 172 [2020-11-07 01:56:46,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1803, Invalid=4359, Unknown=0, NotChecked=0, Total=6162 [2020-11-07 01:56:46,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-11-07 01:56:46,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 168. [2020-11-07 01:56:46,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-11-07 01:56:46,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 173 transitions. [2020-11-07 01:56:46,840 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 173 transitions. Word has length 151 [2020-11-07 01:56:46,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:56:46,840 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 173 transitions. [2020-11-07 01:56:46,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-11-07 01:56:46,840 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 173 transitions. [2020-11-07 01:56:46,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-11-07 01:56:46,842 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:56:46,842 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 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] [2020-11-07 01:56:46,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-11-07 01:56:46,843 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:56:46,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:56:46,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1818939656, now seen corresponding path program 18 times [2020-11-07 01:56:46,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:56:46,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911620521] [2020-11-07 01:56:46,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:56:47,009 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:56:47,011 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:56:47,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:47,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:56:47,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:47,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:56:47,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:49,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:56:49,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911620521] [2020-11-07 01:56:49,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:56:49,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2020-11-07 01:56:49,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414907481] [2020-11-07 01:56:49,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-11-07 01:56:49,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:56:49,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-11-07 01:56:49,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=1362, Unknown=0, NotChecked=0, Total=1806 [2020-11-07 01:56:49,779 INFO L87 Difference]: Start difference. First operand 168 states and 173 transitions. Second operand 43 states. [2020-11-07 01:56:52,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:56:52,810 INFO L93 Difference]: Finished difference Result 217 states and 227 transitions. [2020-11-07 01:56:52,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-11-07 01:56:52,811 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 157 [2020-11-07 01:56:52,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:56:52,813 INFO L225 Difference]: With dead ends: 217 [2020-11-07 01:56:52,813 INFO L226 Difference]: Without dead ends: 178 [2020-11-07 01:56:52,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1997, Invalid=4809, Unknown=0, NotChecked=0, Total=6806 [2020-11-07 01:56:52,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-11-07 01:56:52,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 174. [2020-11-07 01:56:52,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-11-07 01:56:52,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 179 transitions. [2020-11-07 01:56:52,843 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 179 transitions. Word has length 157 [2020-11-07 01:56:52,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:56:52,844 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 179 transitions. [2020-11-07 01:56:52,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-11-07 01:56:52,844 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 179 transitions. [2020-11-07 01:56:52,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-11-07 01:56:52,845 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:56:52,845 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 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] [2020-11-07 01:56:52,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-11-07 01:56:52,846 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:56:52,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:56:52,846 INFO L82 PathProgramCache]: Analyzing trace with hash 633386420, now seen corresponding path program 19 times [2020-11-07 01:56:52,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:56:52,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1567455388] [2020-11-07 01:56:52,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:56:53,020 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:56:53,021 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:56:53,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:53,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:56:53,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:53,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:56:53,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:56,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:56:56,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1567455388] [2020-11-07 01:56:56,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:56:56,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2020-11-07 01:56:56,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346674135] [2020-11-07 01:56:56,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-11-07 01:56:56,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:56:56,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-11-07 01:56:56,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=1493, Unknown=0, NotChecked=0, Total=1980 [2020-11-07 01:56:56,033 INFO L87 Difference]: Start difference. First operand 174 states and 179 transitions. Second operand 45 states. [2020-11-07 01:56:59,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:56:59,383 INFO L93 Difference]: Finished difference Result 223 states and 233 transitions. [2020-11-07 01:56:59,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-11-07 01:56:59,388 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 163 [2020-11-07 01:56:59,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:56:59,389 INFO L225 Difference]: With dead ends: 223 [2020-11-07 01:56:59,389 INFO L226 Difference]: Without dead ends: 184 [2020-11-07 01:56:59,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2201, Invalid=5281, Unknown=0, NotChecked=0, Total=7482 [2020-11-07 01:56:59,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-11-07 01:56:59,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 180. [2020-11-07 01:56:59,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-11-07 01:56:59,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 185 transitions. [2020-11-07 01:56:59,413 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 185 transitions. Word has length 163 [2020-11-07 01:56:59,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:56:59,413 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 185 transitions. [2020-11-07 01:56:59,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-11-07 01:56:59,414 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 185 transitions. [2020-11-07 01:56:59,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-11-07 01:56:59,415 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:56:59,415 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 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] [2020-11-07 01:56:59,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-11-07 01:56:59,415 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:56:59,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:56:59,416 INFO L82 PathProgramCache]: Analyzing trace with hash -2017247376, now seen corresponding path program 20 times [2020-11-07 01:56:59,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:56:59,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1974611152] [2020-11-07 01:56:59,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:56:59,595 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:56:59,597 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:56:59,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:59,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:56:59,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:59,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:56:59,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:02,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:57:02,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1974611152] [2020-11-07 01:57:02,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:02,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2020-11-07 01:57:02,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004259728] [2020-11-07 01:57:02,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-11-07 01:57:02,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:02,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-11-07 01:57:02,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=1630, Unknown=0, NotChecked=0, Total=2162 [2020-11-07 01:57:02,935 INFO L87 Difference]: Start difference. First operand 180 states and 185 transitions. Second operand 47 states. [2020-11-07 01:57:06,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:06,579 INFO L93 Difference]: Finished difference Result 229 states and 239 transitions. [2020-11-07 01:57:06,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-11-07 01:57:06,580 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 169 [2020-11-07 01:57:06,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:06,581 INFO L225 Difference]: With dead ends: 229 [2020-11-07 01:57:06,581 INFO L226 Difference]: Without dead ends: 190 [2020-11-07 01:57:06,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1443 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=2415, Invalid=5775, Unknown=0, NotChecked=0, Total=8190 [2020-11-07 01:57:06,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-11-07 01:57:06,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 186. [2020-11-07 01:57:06,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-11-07 01:57:06,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 191 transitions. [2020-11-07 01:57:06,612 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 191 transitions. Word has length 169 [2020-11-07 01:57:06,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:06,613 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 191 transitions. [2020-11-07 01:57:06,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-11-07 01:57:06,613 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 191 transitions. [2020-11-07 01:57:06,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-11-07 01:57:06,614 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:06,614 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 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] [2020-11-07 01:57:06,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-11-07 01:57:06,615 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:06,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:06,615 INFO L82 PathProgramCache]: Analyzing trace with hash -284259284, now seen corresponding path program 21 times [2020-11-07 01:57:06,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:06,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581032908] [2020-11-07 01:57:06,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:06,782 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:57:06,784 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:06,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:06,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:06,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:06,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:57:06,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:10,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:57:10,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [581032908] [2020-11-07 01:57:10,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:10,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2020-11-07 01:57:10,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623506345] [2020-11-07 01:57:10,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-11-07 01:57:10,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:10,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-11-07 01:57:10,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=1773, Unknown=0, NotChecked=0, Total=2352 [2020-11-07 01:57:10,308 INFO L87 Difference]: Start difference. First operand 186 states and 191 transitions. Second operand 49 states. [2020-11-07 01:57:14,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:14,074 INFO L93 Difference]: Finished difference Result 235 states and 245 transitions. [2020-11-07 01:57:14,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-11-07 01:57:14,080 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 175 [2020-11-07 01:57:14,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:14,082 INFO L225 Difference]: With dead ends: 235 [2020-11-07 01:57:14,082 INFO L226 Difference]: Without dead ends: 196 [2020-11-07 01:57:14,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=2639, Invalid=6291, Unknown=0, NotChecked=0, Total=8930 [2020-11-07 01:57:14,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-11-07 01:57:14,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 192. [2020-11-07 01:57:14,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-11-07 01:57:14,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 197 transitions. [2020-11-07 01:57:14,115 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 197 transitions. Word has length 175 [2020-11-07 01:57:14,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:14,115 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 197 transitions. [2020-11-07 01:57:14,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-11-07 01:57:14,115 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 197 transitions. [2020-11-07 01:57:14,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-11-07 01:57:14,117 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:14,117 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 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] [2020-11-07 01:57:14,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-11-07 01:57:14,117 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:14,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:14,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1530635288, now seen corresponding path program 22 times [2020-11-07 01:57:14,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:14,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1394503431] [2020-11-07 01:57:14,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:14,294 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:57:14,295 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:14,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:14,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:14,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:14,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:57:14,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:18,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:57:18,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1394503431] [2020-11-07 01:57:18,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:18,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2020-11-07 01:57:18,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030524524] [2020-11-07 01:57:18,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-11-07 01:57:18,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:18,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-11-07 01:57:18,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=628, Invalid=1922, Unknown=0, NotChecked=0, Total=2550 [2020-11-07 01:57:18,108 INFO L87 Difference]: Start difference. First operand 192 states and 197 transitions. Second operand 51 states. [2020-11-07 01:57:22,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:22,345 INFO L93 Difference]: Finished difference Result 241 states and 251 transitions. [2020-11-07 01:57:22,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-11-07 01:57:22,346 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 181 [2020-11-07 01:57:22,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:22,348 INFO L225 Difference]: With dead ends: 241 [2020-11-07 01:57:22,348 INFO L226 Difference]: Without dead ends: 202 [2020-11-07 01:57:22,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1719 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=2873, Invalid=6829, Unknown=0, NotChecked=0, Total=9702 [2020-11-07 01:57:22,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-11-07 01:57:22,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 198. [2020-11-07 01:57:22,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-11-07 01:57:22,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 203 transitions. [2020-11-07 01:57:22,386 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 203 transitions. Word has length 181 [2020-11-07 01:57:22,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:22,387 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 203 transitions. [2020-11-07 01:57:22,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-11-07 01:57:22,387 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 203 transitions. [2020-11-07 01:57:22,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-11-07 01:57:22,389 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:22,389 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 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] [2020-11-07 01:57:22,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-11-07 01:57:22,389 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:22,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:22,390 INFO L82 PathProgramCache]: Analyzing trace with hash -2118750556, now seen corresponding path program 23 times [2020-11-07 01:57:22,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:22,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232924354] [2020-11-07 01:57:22,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:22,583 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:57:22,585 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:22,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:22,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:22,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:22,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:57:22,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:26,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:57:26,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232924354] [2020-11-07 01:57:26,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:26,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2020-11-07 01:57:26,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059435521] [2020-11-07 01:57:26,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-11-07 01:57:26,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:26,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-11-07 01:57:26,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=679, Invalid=2077, Unknown=0, NotChecked=0, Total=2756 [2020-11-07 01:57:26,792 INFO L87 Difference]: Start difference. First operand 198 states and 203 transitions. Second operand 53 states. [2020-11-07 01:57:31,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:31,444 INFO L93 Difference]: Finished difference Result 247 states and 257 transitions. [2020-11-07 01:57:31,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-11-07 01:57:31,445 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 187 [2020-11-07 01:57:31,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:31,448 INFO L225 Difference]: With dead ends: 247 [2020-11-07 01:57:31,448 INFO L226 Difference]: Without dead ends: 208 [2020-11-07 01:57:31,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1866 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=3117, Invalid=7389, Unknown=0, NotChecked=0, Total=10506 [2020-11-07 01:57:31,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-11-07 01:57:31,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 204. [2020-11-07 01:57:31,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-11-07 01:57:31,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 209 transitions. [2020-11-07 01:57:31,489 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 209 transitions. Word has length 187 [2020-11-07 01:57:31,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:31,490 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 209 transitions. [2020-11-07 01:57:31,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-11-07 01:57:31,490 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 209 transitions. [2020-11-07 01:57:31,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-11-07 01:57:31,491 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:31,492 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 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] [2020-11-07 01:57:31,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-11-07 01:57:31,492 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:31,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:31,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1785103456, now seen corresponding path program 24 times [2020-11-07 01:57:31,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:31,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1417214535] [2020-11-07 01:57:31,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:31,677 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:57:31,679 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:31,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:31,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:31,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:31,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:57:31,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:36,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:57:36,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1417214535] [2020-11-07 01:57:36,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:36,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2020-11-07 01:57:36,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28090834] [2020-11-07 01:57:36,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-11-07 01:57:36,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:36,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-11-07 01:57:36,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=732, Invalid=2238, Unknown=0, NotChecked=0, Total=2970 [2020-11-07 01:57:36,270 INFO L87 Difference]: Start difference. First operand 204 states and 209 transitions. Second operand 55 states. [2020-11-07 01:57:41,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:41,507 INFO L93 Difference]: Finished difference Result 253 states and 263 transitions. [2020-11-07 01:57:41,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-11-07 01:57:41,508 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 193 [2020-11-07 01:57:41,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:41,510 INFO L225 Difference]: With dead ends: 253 [2020-11-07 01:57:41,510 INFO L226 Difference]: Without dead ends: 214 [2020-11-07 01:57:41,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2019 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=3371, Invalid=7971, Unknown=0, NotChecked=0, Total=11342 [2020-11-07 01:57:41,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-11-07 01:57:41,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 210. [2020-11-07 01:57:41,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-11-07 01:57:41,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 215 transitions. [2020-11-07 01:57:41,559 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 215 transitions. Word has length 193 [2020-11-07 01:57:41,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:41,559 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 215 transitions. [2020-11-07 01:57:41,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-11-07 01:57:41,560 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 215 transitions. [2020-11-07 01:57:41,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-11-07 01:57:41,561 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:41,561 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 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] [2020-11-07 01:57:41,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-11-07 01:57:41,561 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:41,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:41,562 INFO L82 PathProgramCache]: Analyzing trace with hash -888775396, now seen corresponding path program 25 times [2020-11-07 01:57:41,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:41,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762064738] [2020-11-07 01:57:41,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:41,753 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:57:41,755 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:41,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:41,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:41,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:41,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:57:41,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:46,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:57:46,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762064738] [2020-11-07 01:57:46,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:46,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2020-11-07 01:57:46,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724182325] [2020-11-07 01:57:46,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-11-07 01:57:46,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:46,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-11-07 01:57:46,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=787, Invalid=2405, Unknown=0, NotChecked=0, Total=3192 [2020-11-07 01:57:46,663 INFO L87 Difference]: Start difference. First operand 210 states and 215 transitions. Second operand 57 states. [2020-11-07 01:57:51,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:51,879 INFO L93 Difference]: Finished difference Result 259 states and 269 transitions. [2020-11-07 01:57:51,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-11-07 01:57:51,880 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 199 [2020-11-07 01:57:51,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:51,882 INFO L225 Difference]: With dead ends: 259 [2020-11-07 01:57:51,882 INFO L226 Difference]: Without dead ends: 220 [2020-11-07 01:57:51,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2178 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=3635, Invalid=8575, Unknown=0, NotChecked=0, Total=12210 [2020-11-07 01:57:51,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-11-07 01:57:51,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 216. [2020-11-07 01:57:51,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-11-07 01:57:51,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 221 transitions. [2020-11-07 01:57:51,924 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 221 transitions. Word has length 199 [2020-11-07 01:57:51,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:51,925 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 221 transitions. [2020-11-07 01:57:51,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-11-07 01:57:51,925 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 221 transitions. [2020-11-07 01:57:51,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-11-07 01:57:51,927 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:51,927 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 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] [2020-11-07 01:57:51,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-11-07 01:57:51,927 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:51,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:51,928 INFO L82 PathProgramCache]: Analyzing trace with hash 326613208, now seen corresponding path program 26 times [2020-11-07 01:57:51,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:51,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820475050] [2020-11-07 01:57:51,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:52,132 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:57:52,133 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:52,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:52,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:52,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:52,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:57:52,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:57,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:57:57,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820475050] [2020-11-07 01:57:57,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:57,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2020-11-07 01:57:57,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186236923] [2020-11-07 01:57:57,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-11-07 01:57:57,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:57,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-11-07 01:57:57,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=844, Invalid=2578, Unknown=0, NotChecked=0, Total=3422 [2020-11-07 01:57:57,533 INFO L87 Difference]: Start difference. First operand 216 states and 221 transitions. Second operand 59 states. [2020-11-07 01:58:03,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:03,390 INFO L93 Difference]: Finished difference Result 265 states and 275 transitions. [2020-11-07 01:58:03,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-11-07 01:58:03,391 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 205 [2020-11-07 01:58:03,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:03,393 INFO L225 Difference]: With dead ends: 265 [2020-11-07 01:58:03,393 INFO L226 Difference]: Without dead ends: 226 [2020-11-07 01:58:03,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2343 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=3909, Invalid=9201, Unknown=0, NotChecked=0, Total=13110 [2020-11-07 01:58:03,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-11-07 01:58:03,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 222. [2020-11-07 01:58:03,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-11-07 01:58:03,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 227 transitions. [2020-11-07 01:58:03,438 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 227 transitions. Word has length 205 [2020-11-07 01:58:03,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:03,438 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 227 transitions. [2020-11-07 01:58:03,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-11-07 01:58:03,438 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 227 transitions. [2020-11-07 01:58:03,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-11-07 01:58:03,439 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:03,440 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 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] [2020-11-07 01:58:03,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-11-07 01:58:03,440 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:03,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:03,440 INFO L82 PathProgramCache]: Analyzing trace with hash 860641172, now seen corresponding path program 27 times [2020-11-07 01:58:03,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:03,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417543426] [2020-11-07 01:58:03,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:03,650 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:03,652 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:03,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:03,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:03,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:03,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:58:03,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:09,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:09,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417543426] [2020-11-07 01:58:09,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:09,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2020-11-07 01:58:09,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402548573] [2020-11-07 01:58:09,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-11-07 01:58:09,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:09,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-11-07 01:58:09,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=2757, Unknown=0, NotChecked=0, Total=3660 [2020-11-07 01:58:09,517 INFO L87 Difference]: Start difference. First operand 222 states and 227 transitions. Second operand 61 states. [2020-11-07 01:58:15,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:15,935 INFO L93 Difference]: Finished difference Result 271 states and 281 transitions. [2020-11-07 01:58:15,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2020-11-07 01:58:15,936 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 211 [2020-11-07 01:58:15,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:15,938 INFO L225 Difference]: With dead ends: 271 [2020-11-07 01:58:15,939 INFO L226 Difference]: Without dead ends: 232 [2020-11-07 01:58:15,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2514 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=4193, Invalid=9849, Unknown=0, NotChecked=0, Total=14042 [2020-11-07 01:58:15,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-11-07 01:58:15,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 228. [2020-11-07 01:58:15,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-11-07 01:58:15,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 233 transitions. [2020-11-07 01:58:15,972 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 233 transitions. Word has length 211 [2020-11-07 01:58:15,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:15,973 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 233 transitions. [2020-11-07 01:58:15,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-11-07 01:58:15,973 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 233 transitions. [2020-11-07 01:58:15,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-11-07 01:58:15,975 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:15,975 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 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] [2020-11-07 01:58:15,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-11-07 01:58:15,975 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:15,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:15,976 INFO L82 PathProgramCache]: Analyzing trace with hash 365295952, now seen corresponding path program 28 times [2020-11-07 01:58:15,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:15,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [429732071] [2020-11-07 01:58:15,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:16,169 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:16,170 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:16,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:16,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:16,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:16,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:58:16,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:22,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:22,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [429732071] [2020-11-07 01:58:22,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:22,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2020-11-07 01:58:22,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248551605] [2020-11-07 01:58:22,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-11-07 01:58:22,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:22,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-11-07 01:58:22,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=964, Invalid=2942, Unknown=0, NotChecked=0, Total=3906 [2020-11-07 01:58:22,485 INFO L87 Difference]: Start difference. First operand 228 states and 233 transitions. Second operand 63 states. [2020-11-07 01:58:29,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:29,313 INFO L93 Difference]: Finished difference Result 277 states and 287 transitions. [2020-11-07 01:58:29,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-11-07 01:58:29,314 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 217 [2020-11-07 01:58:29,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:29,316 INFO L225 Difference]: With dead ends: 277 [2020-11-07 01:58:29,316 INFO L226 Difference]: Without dead ends: 238 [2020-11-07 01:58:29,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2691 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=4487, Invalid=10519, Unknown=0, NotChecked=0, Total=15006 [2020-11-07 01:58:29,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-11-07 01:58:29,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 234. [2020-11-07 01:58:29,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-11-07 01:58:29,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 239 transitions. [2020-11-07 01:58:29,380 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 239 transitions. Word has length 217 [2020-11-07 01:58:29,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:29,380 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 239 transitions. [2020-11-07 01:58:29,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-11-07 01:58:29,381 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 239 transitions. [2020-11-07 01:58:29,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-11-07 01:58:29,382 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:29,383 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 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] [2020-11-07 01:58:29,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-11-07 01:58:29,383 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:29,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:29,384 INFO L82 PathProgramCache]: Analyzing trace with hash 500588044, now seen corresponding path program 29 times [2020-11-07 01:58:29,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:29,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [413105274] [2020-11-07 01:58:29,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:29,617 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:29,618 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:29,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:29,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:29,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:29,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:58:29,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:36,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:36,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [413105274] [2020-11-07 01:58:36,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:36,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2020-11-07 01:58:36,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68234486] [2020-11-07 01:58:36,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-11-07 01:58:36,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:36,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-11-07 01:58:36,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1027, Invalid=3133, Unknown=0, NotChecked=0, Total=4160 [2020-11-07 01:58:36,511 INFO L87 Difference]: Start difference. First operand 234 states and 239 transitions. Second operand 65 states. [2020-11-07 01:58:43,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:43,776 INFO L93 Difference]: Finished difference Result 283 states and 293 transitions. [2020-11-07 01:58:43,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-11-07 01:58:43,778 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 223 [2020-11-07 01:58:43,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:43,780 INFO L225 Difference]: With dead ends: 283 [2020-11-07 01:58:43,780 INFO L226 Difference]: Without dead ends: 244 [2020-11-07 01:58:43,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2874 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=4791, Invalid=11211, Unknown=0, NotChecked=0, Total=16002 [2020-11-07 01:58:43,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-11-07 01:58:43,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 240. [2020-11-07 01:58:43,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-11-07 01:58:43,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 245 transitions. [2020-11-07 01:58:43,832 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 245 transitions. Word has length 223 [2020-11-07 01:58:43,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:43,833 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 245 transitions. [2020-11-07 01:58:43,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-11-07 01:58:43,833 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 245 transitions. [2020-11-07 01:58:43,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-11-07 01:58:43,835 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:43,835 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 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] [2020-11-07 01:58:43,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-11-07 01:58:43,835 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:43,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:43,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1575008824, now seen corresponding path program 30 times [2020-11-07 01:58:43,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:43,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [441060006] [2020-11-07 01:58:43,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:44,046 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:44,047 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:44,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:44,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:44,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:44,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:58:44,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:51,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:51,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [441060006] [2020-11-07 01:58:51,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:51,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2020-11-07 01:58:51,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102633193] [2020-11-07 01:58:51,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-11-07 01:58:51,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:51,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-11-07 01:58:51,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1092, Invalid=3330, Unknown=0, NotChecked=0, Total=4422 [2020-11-07 01:58:51,542 INFO L87 Difference]: Start difference. First operand 240 states and 245 transitions. Second operand 67 states. [2020-11-07 01:58:59,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:59,942 INFO L93 Difference]: Finished difference Result 289 states and 299 transitions. [2020-11-07 01:58:59,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2020-11-07 01:58:59,943 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 229 [2020-11-07 01:58:59,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:59,945 INFO L225 Difference]: With dead ends: 289 [2020-11-07 01:58:59,946 INFO L226 Difference]: Without dead ends: 250 [2020-11-07 01:58:59,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3063 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=5105, Invalid=11925, Unknown=0, NotChecked=0, Total=17030 [2020-11-07 01:58:59,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-11-07 01:59:00,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 246. [2020-11-07 01:59:00,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-11-07 01:59:00,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 251 transitions. [2020-11-07 01:59:00,003 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 251 transitions. Word has length 229 [2020-11-07 01:59:00,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:00,003 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 251 transitions. [2020-11-07 01:59:00,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-11-07 01:59:00,003 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 251 transitions. [2020-11-07 01:59:00,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-11-07 01:59:00,005 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:00,005 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 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] [2020-11-07 01:59:00,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-11-07 01:59:00,006 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:00,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:00,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1760718980, now seen corresponding path program 31 times [2020-11-07 01:59:00,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:00,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2142494418] [2020-11-07 01:59:00,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:00,216 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:00,218 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:00,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:00,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:00,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:00,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:59:00,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:08,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:08,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2142494418] [2020-11-07 01:59:08,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:08,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2020-11-07 01:59:08,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618452983] [2020-11-07 01:59:08,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-11-07 01:59:08,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:08,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-11-07 01:59:08,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1159, Invalid=3533, Unknown=0, NotChecked=0, Total=4692 [2020-11-07 01:59:08,447 INFO L87 Difference]: Start difference. First operand 246 states and 251 transitions. Second operand 69 states. [2020-11-07 01:59:17,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:17,311 INFO L93 Difference]: Finished difference Result 295 states and 305 transitions. [2020-11-07 01:59:17,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2020-11-07 01:59:17,314 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 235 [2020-11-07 01:59:17,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:17,316 INFO L225 Difference]: With dead ends: 295 [2020-11-07 01:59:17,316 INFO L226 Difference]: Without dead ends: 256 [2020-11-07 01:59:17,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3258 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=5429, Invalid=12661, Unknown=0, NotChecked=0, Total=18090 [2020-11-07 01:59:17,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-11-07 01:59:17,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 252. [2020-11-07 01:59:17,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-11-07 01:59:17,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 257 transitions. [2020-11-07 01:59:17,358 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 257 transitions. Word has length 235 [2020-11-07 01:59:17,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:17,358 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 257 transitions. [2020-11-07 01:59:17,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-11-07 01:59:17,358 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 257 transitions. [2020-11-07 01:59:17,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-11-07 01:59:17,359 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:17,359 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 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] [2020-11-07 01:59:17,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-11-07 01:59:17,360 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:17,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:17,360 INFO L82 PathProgramCache]: Analyzing trace with hash 609328704, now seen corresponding path program 32 times [2020-11-07 01:59:17,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:17,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [714119382] [2020-11-07 01:59:17,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:17,606 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:17,608 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:17,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:17,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:17,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:17,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:59:17,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:26,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:26,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [714119382] [2020-11-07 01:59:26,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:26,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2020-11-07 01:59:26,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305543022] [2020-11-07 01:59:26,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-11-07 01:59:26,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:26,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-11-07 01:59:26,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1228, Invalid=3742, Unknown=0, NotChecked=0, Total=4970 [2020-11-07 01:59:26,382 INFO L87 Difference]: Start difference. First operand 252 states and 257 transitions. Second operand 71 states. [2020-11-07 01:59:36,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:36,765 INFO L93 Difference]: Finished difference Result 301 states and 311 transitions. [2020-11-07 01:59:36,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2020-11-07 01:59:36,766 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 241 [2020-11-07 01:59:36,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:36,769 INFO L225 Difference]: With dead ends: 301 [2020-11-07 01:59:36,769 INFO L226 Difference]: Without dead ends: 262 [2020-11-07 01:59:36,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3459 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=5763, Invalid=13419, Unknown=0, NotChecked=0, Total=19182 [2020-11-07 01:59:36,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-11-07 01:59:36,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 258. [2020-11-07 01:59:36,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-11-07 01:59:36,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 263 transitions. [2020-11-07 01:59:36,829 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 263 transitions. Word has length 241 [2020-11-07 01:59:36,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:36,830 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 263 transitions. [2020-11-07 01:59:36,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-11-07 01:59:36,830 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 263 transitions. [2020-11-07 01:59:36,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-11-07 01:59:36,832 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:36,832 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 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] [2020-11-07 01:59:36,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-11-07 01:59:36,832 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:36,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:36,833 INFO L82 PathProgramCache]: Analyzing trace with hash -303132932, now seen corresponding path program 33 times [2020-11-07 01:59:36,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:36,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767472989] [2020-11-07 01:59:36,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:37,066 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:37,067 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:37,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:37,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:37,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:37,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:59:37,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:46,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:46,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767472989] [2020-11-07 01:59:46,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:46,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2020-11-07 01:59:46,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782650944] [2020-11-07 01:59:46,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-11-07 01:59:46,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:46,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-11-07 01:59:46,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1299, Invalid=3957, Unknown=0, NotChecked=0, Total=5256 [2020-11-07 01:59:46,342 INFO L87 Difference]: Start difference. First operand 258 states and 263 transitions. Second operand 73 states. [2020-11-07 01:59:57,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:57,684 INFO L93 Difference]: Finished difference Result 307 states and 317 transitions. [2020-11-07 01:59:57,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2020-11-07 01:59:57,685 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 247 [2020-11-07 01:59:57,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:57,687 INFO L225 Difference]: With dead ends: 307 [2020-11-07 01:59:57,688 INFO L226 Difference]: Without dead ends: 268 [2020-11-07 01:59:57,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3666 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=6107, Invalid=14199, Unknown=0, NotChecked=0, Total=20306 [2020-11-07 01:59:57,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-11-07 01:59:57,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 264. [2020-11-07 01:59:57,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-11-07 01:59:57,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 269 transitions. [2020-11-07 01:59:57,755 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 269 transitions. Word has length 247 [2020-11-07 01:59:57,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:57,755 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 269 transitions. [2020-11-07 01:59:57,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-11-07 01:59:57,755 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 269 transitions. [2020-11-07 01:59:57,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-11-07 01:59:57,757 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:57,758 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 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] [2020-11-07 01:59:57,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-11-07 01:59:57,758 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:57,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:57,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1020591432, now seen corresponding path program 34 times [2020-11-07 01:59:57,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:57,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512670392] [2020-11-07 01:59:57,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:58,007 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:58,009 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:58,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:58,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:58,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:58,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:59:58,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:08,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:00:08,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512670392] [2020-11-07 02:00:08,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:00:08,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2020-11-07 02:00:08,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620266695] [2020-11-07 02:00:08,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-11-07 02:00:08,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:00:08,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-11-07 02:00:08,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1372, Invalid=4178, Unknown=0, NotChecked=0, Total=5550 [2020-11-07 02:00:08,035 INFO L87 Difference]: Start difference. First operand 264 states and 269 transitions. Second operand 75 states. [2020-11-07 02:00:19,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:00:19,333 INFO L93 Difference]: Finished difference Result 313 states and 323 transitions. [2020-11-07 02:00:19,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2020-11-07 02:00:19,335 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 253 [2020-11-07 02:00:19,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:00:19,336 INFO L225 Difference]: With dead ends: 313 [2020-11-07 02:00:19,337 INFO L226 Difference]: Without dead ends: 274 [2020-11-07 02:00:19,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3879 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=6461, Invalid=15001, Unknown=0, NotChecked=0, Total=21462 [2020-11-07 02:00:19,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-11-07 02:00:19,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 270. [2020-11-07 02:00:19,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-11-07 02:00:19,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 275 transitions. [2020-11-07 02:00:19,406 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 275 transitions. Word has length 253 [2020-11-07 02:00:19,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:00:19,406 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 275 transitions. [2020-11-07 02:00:19,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-11-07 02:00:19,406 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 275 transitions. [2020-11-07 02:00:19,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-11-07 02:00:19,407 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:00:19,408 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 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] [2020-11-07 02:00:19,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-11-07 02:00:19,408 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:00:19,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:00:19,408 INFO L82 PathProgramCache]: Analyzing trace with hash 18397556, now seen corresponding path program 35 times [2020-11-07 02:00:19,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:00:19,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1732109157] [2020-11-07 02:00:19,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:00:19,625 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:00:19,627 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:00:19,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:19,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:00:19,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:19,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 02:00:19,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:30,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:00:30,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1732109157] [2020-11-07 02:00:30,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:00:30,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2020-11-07 02:00:30,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562294536] [2020-11-07 02:00:30,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-11-07 02:00:30,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:00:30,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-11-07 02:00:30,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1447, Invalid=4405, Unknown=0, NotChecked=0, Total=5852 [2020-11-07 02:00:30,920 INFO L87 Difference]: Start difference. First operand 270 states and 275 transitions. Second operand 77 states. [2020-11-07 02:00:43,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:00:43,862 INFO L93 Difference]: Finished difference Result 319 states and 329 transitions. [2020-11-07 02:00:43,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2020-11-07 02:00:43,864 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 259 [2020-11-07 02:00:43,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:00:43,866 INFO L225 Difference]: With dead ends: 319 [2020-11-07 02:00:43,866 INFO L226 Difference]: Without dead ends: 280 [2020-11-07 02:00:43,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4098 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=6825, Invalid=15825, Unknown=0, NotChecked=0, Total=22650 [2020-11-07 02:00:43,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-11-07 02:00:43,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 276. [2020-11-07 02:00:43,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-11-07 02:00:43,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 281 transitions. [2020-11-07 02:00:43,935 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 281 transitions. Word has length 259 [2020-11-07 02:00:43,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:00:43,935 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 281 transitions. [2020-11-07 02:00:43,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-11-07 02:00:43,935 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 281 transitions. [2020-11-07 02:00:43,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-11-07 02:00:43,937 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:00:43,937 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 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] [2020-11-07 02:00:43,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-11-07 02:00:43,938 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:00:43,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:00:43,938 INFO L82 PathProgramCache]: Analyzing trace with hash -528911568, now seen corresponding path program 36 times [2020-11-07 02:00:43,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:00:43,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949452704] [2020-11-07 02:00:43,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:00:44,219 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:00:44,221 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:00:44,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:44,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:00:44,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:44,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 02:00:44,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:56,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:00:56,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949452704] [2020-11-07 02:00:56,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:00:56,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2020-11-07 02:00:56,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691891631] [2020-11-07 02:00:56,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-11-07 02:00:56,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:00:56,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-11-07 02:00:56,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1524, Invalid=4638, Unknown=0, NotChecked=0, Total=6162 [2020-11-07 02:00:56,252 INFO L87 Difference]: Start difference. First operand 276 states and 281 transitions. Second operand 79 states. [2020-11-07 02:01:10,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:01:10,393 INFO L93 Difference]: Finished difference Result 325 states and 335 transitions. [2020-11-07 02:01:10,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2020-11-07 02:01:10,396 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 265 [2020-11-07 02:01:10,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:01:10,398 INFO L225 Difference]: With dead ends: 325 [2020-11-07 02:01:10,398 INFO L226 Difference]: Without dead ends: 286 [2020-11-07 02:01:10,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4323 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=7199, Invalid=16671, Unknown=0, NotChecked=0, Total=23870 [2020-11-07 02:01:10,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-11-07 02:01:10,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 282. [2020-11-07 02:01:10,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-11-07 02:01:10,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 287 transitions. [2020-11-07 02:01:10,468 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 287 transitions. Word has length 265 [2020-11-07 02:01:10,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:01:10,468 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 287 transitions. [2020-11-07 02:01:10,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-11-07 02:01:10,469 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 287 transitions. [2020-11-07 02:01:10,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-11-07 02:01:10,471 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:01:10,471 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 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] [2020-11-07 02:01:10,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-11-07 02:01:10,471 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:01:10,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:01:10,472 INFO L82 PathProgramCache]: Analyzing trace with hash -239144980, now seen corresponding path program 37 times [2020-11-07 02:01:10,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:01:10,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [733600125] [2020-11-07 02:01:10,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:01:10,738 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:01:10,740 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:01:10,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:10,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:01:10,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:10,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 02:01:10,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:24,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:01:24,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [733600125] [2020-11-07 02:01:24,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:01:24,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2020-11-07 02:01:24,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784252274] [2020-11-07 02:01:24,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-11-07 02:01:24,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:01:24,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-11-07 02:01:24,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1603, Invalid=4877, Unknown=0, NotChecked=0, Total=6480 [2020-11-07 02:01:24,207 INFO L87 Difference]: Start difference. First operand 282 states and 287 transitions. Second operand 81 states. [2020-11-07 02:01:39,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:01:39,869 INFO L93 Difference]: Finished difference Result 331 states and 341 transitions. [2020-11-07 02:01:39,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2020-11-07 02:01:39,872 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 271 [2020-11-07 02:01:39,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:01:39,874 INFO L225 Difference]: With dead ends: 331 [2020-11-07 02:01:39,874 INFO L226 Difference]: Without dead ends: 292 [2020-11-07 02:01:39,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4554 ImplicationChecksByTransitivity, 25.6s TimeCoverageRelationStatistics Valid=7583, Invalid=17539, Unknown=0, NotChecked=0, Total=25122 [2020-11-07 02:01:39,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-11-07 02:01:39,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 288. [2020-11-07 02:01:39,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-11-07 02:01:39,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 293 transitions. [2020-11-07 02:01:39,945 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 293 transitions. Word has length 271 [2020-11-07 02:01:39,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:01:39,945 INFO L481 AbstractCegarLoop]: Abstraction has 288 states and 293 transitions. [2020-11-07 02:01:39,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-11-07 02:01:39,945 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 293 transitions. [2020-11-07 02:01:39,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2020-11-07 02:01:39,947 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:01:39,948 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 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] [2020-11-07 02:01:39,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-11-07 02:01:39,948 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:01:39,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:01:39,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1727336536, now seen corresponding path program 38 times [2020-11-07 02:01:39,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:01:39,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1776328093] [2020-11-07 02:01:39,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:01:40,234 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:01:40,235 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:01:40,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:40,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:01:40,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:40,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 02:01:40,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:54,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:01:54,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1776328093] [2020-11-07 02:01:54,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:01:54,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2020-11-07 02:01:55,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840399159] [2020-11-07 02:01:55,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-11-07 02:01:55,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:01:55,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-11-07 02:01:55,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1684, Invalid=5122, Unknown=0, NotChecked=0, Total=6806 [2020-11-07 02:01:55,001 INFO L87 Difference]: Start difference. First operand 288 states and 293 transitions. Second operand 83 states. [2020-11-07 02:02:11,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:02:11,035 INFO L93 Difference]: Finished difference Result 337 states and 347 transitions. [2020-11-07 02:02:11,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2020-11-07 02:02:11,037 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 277 [2020-11-07 02:02:11,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:02:11,041 INFO L225 Difference]: With dead ends: 337 [2020-11-07 02:02:11,041 INFO L226 Difference]: Without dead ends: 298 [2020-11-07 02:02:11,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4791 ImplicationChecksByTransitivity, 28.2s TimeCoverageRelationStatistics Valid=7977, Invalid=18429, Unknown=0, NotChecked=0, Total=26406 [2020-11-07 02:02:11,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-11-07 02:02:11,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 294. [2020-11-07 02:02:11,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-11-07 02:02:11,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 299 transitions. [2020-11-07 02:02:11,141 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 299 transitions. Word has length 277 [2020-11-07 02:02:11,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:02:11,142 INFO L481 AbstractCegarLoop]: Abstraction has 294 states and 299 transitions. [2020-11-07 02:02:11,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-11-07 02:02:11,142 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 299 transitions. [2020-11-07 02:02:11,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2020-11-07 02:02:11,155 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:02:11,155 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 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] [2020-11-07 02:02:11,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-11-07 02:02:11,155 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:02:11,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:02:11,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1976618396, now seen corresponding path program 39 times [2020-11-07 02:02:11,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:02:11,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624211164] [2020-11-07 02:02:11,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:02:11,425 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:02:11,426 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:02:11,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:02:11,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:02:11,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:02:11,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 02:02:11,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:02:27,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:02:27,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624211164] [2020-11-07 02:02:27,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:02:27,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2020-11-07 02:02:27,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409872345] [2020-11-07 02:02:27,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-11-07 02:02:27,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:02:27,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-11-07 02:02:27,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1767, Invalid=5373, Unknown=0, NotChecked=0, Total=7140 [2020-11-07 02:02:27,689 INFO L87 Difference]: Start difference. First operand 294 states and 299 transitions. Second operand 85 states. [2020-11-07 02:02:45,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:02:45,225 INFO L93 Difference]: Finished difference Result 343 states and 353 transitions. [2020-11-07 02:02:45,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2020-11-07 02:02:45,228 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 283 [2020-11-07 02:02:45,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:02:45,230 INFO L225 Difference]: With dead ends: 343 [2020-11-07 02:02:45,230 INFO L226 Difference]: Without dead ends: 304 [2020-11-07 02:02:45,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5034 ImplicationChecksByTransitivity, 31.2s TimeCoverageRelationStatistics Valid=8381, Invalid=19341, Unknown=0, NotChecked=0, Total=27722 [2020-11-07 02:02:45,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-11-07 02:02:45,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 300. [2020-11-07 02:02:45,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2020-11-07 02:02:45,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 305 transitions. [2020-11-07 02:02:45,351 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 305 transitions. Word has length 283 [2020-11-07 02:02:45,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:02:45,352 INFO L481 AbstractCegarLoop]: Abstraction has 300 states and 305 transitions. [2020-11-07 02:02:45,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-11-07 02:02:45,352 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 305 transitions. [2020-11-07 02:02:45,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2020-11-07 02:02:45,354 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:02:45,355 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 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] [2020-11-07 02:02:45,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-11-07 02:02:45,355 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:02:45,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:02:45,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1152219168, now seen corresponding path program 40 times [2020-11-07 02:02:45,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:02:45,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [748661544] [2020-11-07 02:02:45,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:02:45,648 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:02:45,649 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:02:45,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:02:45,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:02:45,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:02:45,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 02:02:45,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:03:03,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:03:03,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [748661544] [2020-11-07 02:03:03,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:03:03,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2020-11-07 02:03:03,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737623811] [2020-11-07 02:03:03,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 87 states [2020-11-07 02:03:03,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:03:03,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2020-11-07 02:03:03,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1852, Invalid=5630, Unknown=0, NotChecked=0, Total=7482 [2020-11-07 02:03:03,929 INFO L87 Difference]: Start difference. First operand 300 states and 305 transitions. Second operand 87 states. [2020-11-07 02:03:22,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:03:22,962 INFO L93 Difference]: Finished difference Result 349 states and 359 transitions. [2020-11-07 02:03:22,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2020-11-07 02:03:22,965 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 289 [2020-11-07 02:03:22,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:03:22,967 INFO L225 Difference]: With dead ends: 349 [2020-11-07 02:03:22,967 INFO L226 Difference]: Without dead ends: 310 [2020-11-07 02:03:22,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5283 ImplicationChecksByTransitivity, 34.6s TimeCoverageRelationStatistics Valid=8795, Invalid=20275, Unknown=0, NotChecked=0, Total=29070 [2020-11-07 02:03:22,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-11-07 02:03:23,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 306. [2020-11-07 02:03:23,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-11-07 02:03:23,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 311 transitions. [2020-11-07 02:03:23,063 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 311 transitions. Word has length 289 [2020-11-07 02:03:23,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:03:23,064 INFO L481 AbstractCegarLoop]: Abstraction has 306 states and 311 transitions. [2020-11-07 02:03:23,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 87 states. [2020-11-07 02:03:23,064 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 311 transitions. [2020-11-07 02:03:23,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2020-11-07 02:03:23,066 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:03:23,067 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 41, 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] [2020-11-07 02:03:23,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-11-07 02:03:23,067 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:03:23,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:03:23,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1883799332, now seen corresponding path program 41 times [2020-11-07 02:03:23,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:03:23,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455416317] [2020-11-07 02:03:23,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:03:23,366 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:03:23,367 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:03:23,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:03:23,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:03:23,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:03:23,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 02:03:23,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:03:43,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:03:43,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455416317] [2020-11-07 02:03:43,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:03:43,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2020-11-07 02:03:43,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047857338] [2020-11-07 02:03:43,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 89 states [2020-11-07 02:03:43,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:03:43,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2020-11-07 02:03:43,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1939, Invalid=5893, Unknown=0, NotChecked=0, Total=7832 [2020-11-07 02:03:43,990 INFO L87 Difference]: Start difference. First operand 306 states and 311 transitions. Second operand 89 states. [2020-11-07 02:04:00,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:04:00,502 INFO L93 Difference]: Finished difference Result 355 states and 365 transitions. [2020-11-07 02:04:00,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2020-11-07 02:04:00,505 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 295 [2020-11-07 02:04:00,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:04:00,507 INFO L225 Difference]: With dead ends: 355 [2020-11-07 02:04:00,507 INFO L226 Difference]: Without dead ends: 316 [2020-11-07 02:04:00,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5538 ImplicationChecksByTransitivity, 35.1s TimeCoverageRelationStatistics Valid=9219, Invalid=21231, Unknown=0, NotChecked=0, Total=30450 [2020-11-07 02:04:00,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-11-07 02:04:00,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 312. [2020-11-07 02:04:00,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-11-07 02:04:00,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 317 transitions. [2020-11-07 02:04:00,569 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 317 transitions. Word has length 295 [2020-11-07 02:04:00,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:04:00,569 INFO L481 AbstractCegarLoop]: Abstraction has 312 states and 317 transitions. [2020-11-07 02:04:00,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 89 states. [2020-11-07 02:04:00,569 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 317 transitions. [2020-11-07 02:04:00,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-11-07 02:04:00,571 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:04:00,571 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 42, 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] [2020-11-07 02:04:00,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-11-07 02:04:00,572 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:04:00,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:04:00,572 INFO L82 PathProgramCache]: Analyzing trace with hash -164688744, now seen corresponding path program 42 times [2020-11-07 02:04:00,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:04:00,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1862304744] [2020-11-07 02:04:00,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:04:00,846 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:04:00,847 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:04:00,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:04:00,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:04:00,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:04:01,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 02:04:01,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:04:17,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:04:17,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1862304744] [2020-11-07 02:04:17,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:04:17,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2020-11-07 02:04:17,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222755473] [2020-11-07 02:04:17,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 91 states [2020-11-07 02:04:17,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:04:17,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2020-11-07 02:04:17,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2028, Invalid=6162, Unknown=0, NotChecked=0, Total=8190 [2020-11-07 02:04:17,544 INFO L87 Difference]: Start difference. First operand 312 states and 317 transitions. Second operand 91 states. [2020-11-07 02:04:37,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:04:37,382 INFO L93 Difference]: Finished difference Result 361 states and 371 transitions. [2020-11-07 02:04:37,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2020-11-07 02:04:37,384 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 301 [2020-11-07 02:04:37,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:04:37,386 INFO L225 Difference]: With dead ends: 361 [2020-11-07 02:04:37,387 INFO L226 Difference]: Without dead ends: 322 [2020-11-07 02:04:37,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5799 ImplicationChecksByTransitivity, 32.5s TimeCoverageRelationStatistics Valid=9653, Invalid=22209, Unknown=0, NotChecked=0, Total=31862 [2020-11-07 02:04:37,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-11-07 02:04:37,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 318. [2020-11-07 02:04:37,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-11-07 02:04:37,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 323 transitions. [2020-11-07 02:04:37,476 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 323 transitions. Word has length 301 [2020-11-07 02:04:37,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:04:37,477 INFO L481 AbstractCegarLoop]: Abstraction has 318 states and 323 transitions. [2020-11-07 02:04:37,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 91 states. [2020-11-07 02:04:37,480 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 323 transitions. [2020-11-07 02:04:37,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-11-07 02:04:37,482 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:04:37,482 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 43, 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] [2020-11-07 02:04:37,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-11-07 02:04:37,483 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:04:37,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:04:37,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1118165844, now seen corresponding path program 43 times [2020-11-07 02:04:37,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:04:37,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455009102] [2020-11-07 02:04:37,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:04:37,746 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:04:37,747 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:04:37,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:04:37,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:04:37,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:04:37,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 02:04:37,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:04:55,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:04:55,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455009102] [2020-11-07 02:04:55,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:04:55,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2020-11-07 02:04:55,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929329275] [2020-11-07 02:04:55,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 93 states [2020-11-07 02:04:55,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:04:55,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2020-11-07 02:04:55,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2119, Invalid=6437, Unknown=0, NotChecked=0, Total=8556 [2020-11-07 02:04:55,688 INFO L87 Difference]: Start difference. First operand 318 states and 323 transitions. Second operand 93 states. [2020-11-07 02:05:16,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:05:16,870 INFO L93 Difference]: Finished difference Result 367 states and 377 transitions. [2020-11-07 02:05:16,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2020-11-07 02:05:16,873 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 307 [2020-11-07 02:05:16,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:05:16,875 INFO L225 Difference]: With dead ends: 367 [2020-11-07 02:05:16,875 INFO L226 Difference]: Without dead ends: 328 [2020-11-07 02:05:16,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6066 ImplicationChecksByTransitivity, 35.1s TimeCoverageRelationStatistics Valid=10097, Invalid=23209, Unknown=0, NotChecked=0, Total=33306 [2020-11-07 02:05:16,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-11-07 02:05:16,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 324. [2020-11-07 02:05:16,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-11-07 02:05:16,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 329 transitions. [2020-11-07 02:05:16,971 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 329 transitions. Word has length 307 [2020-11-07 02:05:16,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:05:16,972 INFO L481 AbstractCegarLoop]: Abstraction has 324 states and 329 transitions. [2020-11-07 02:05:16,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 93 states. [2020-11-07 02:05:16,972 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 329 transitions. [2020-11-07 02:05:16,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2020-11-07 02:05:16,974 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:05:16,975 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 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] [2020-11-07 02:05:16,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-11-07 02:05:16,975 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:05:16,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:05:16,975 INFO L82 PathProgramCache]: Analyzing trace with hash -77746928, now seen corresponding path program 44 times [2020-11-07 02:05:16,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:05:16,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722688035] [2020-11-07 02:05:16,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:05:17,327 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:05:17,328 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:05:17,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:05:17,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:05:17,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:05:17,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 02:05:17,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:05:22,018 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:05:44,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:05:44,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1722688035] [2020-11-07 02:05:44,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:05:44,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2020-11-07 02:05:44,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810104124] [2020-11-07 02:05:44,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 95 states [2020-11-07 02:05:44,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:05:44,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2020-11-07 02:05:44,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2212, Invalid=6718, Unknown=0, NotChecked=0, Total=8930 [2020-11-07 02:05:44,124 INFO L87 Difference]: Start difference. First operand 324 states and 329 transitions. Second operand 95 states. [2020-11-07 02:06:09,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:06:09,053 INFO L93 Difference]: Finished difference Result 373 states and 383 transitions. [2020-11-07 02:06:09,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2020-11-07 02:06:09,057 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 313 [2020-11-07 02:06:09,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:06:09,059 INFO L225 Difference]: With dead ends: 373 [2020-11-07 02:06:09,059 INFO L226 Difference]: Without dead ends: 334 [2020-11-07 02:06:09,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6339 ImplicationChecksByTransitivity, 46.8s TimeCoverageRelationStatistics Valid=10551, Invalid=24231, Unknown=0, NotChecked=0, Total=34782 [2020-11-07 02:06:09,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-11-07 02:06:09,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 330. [2020-11-07 02:06:09,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-11-07 02:06:09,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 335 transitions. [2020-11-07 02:06:09,140 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 335 transitions. Word has length 313 [2020-11-07 02:06:09,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:06:09,140 INFO L481 AbstractCegarLoop]: Abstraction has 330 states and 335 transitions. [2020-11-07 02:06:09,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 95 states. [2020-11-07 02:06:09,141 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 335 transitions. [2020-11-07 02:06:09,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-11-07 02:06:09,142 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:06:09,143 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 45, 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] [2020-11-07 02:06:09,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-11-07 02:06:09,143 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:06:09,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:06:09,144 INFO L82 PathProgramCache]: Analyzing trace with hash -565689908, now seen corresponding path program 45 times [2020-11-07 02:06:09,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:06:09,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994239495] [2020-11-07 02:06:09,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:06:09,253 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-11-07 02:06:09,500 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:06:09,502 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:06:09,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:06:09,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:06:09,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:06:09,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 02:06:09,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:06:34,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:06:34,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [994239495] [2020-11-07 02:06:34,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:06:34,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2020-11-07 02:06:34,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230277641] [2020-11-07 02:06:34,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 97 states [2020-11-07 02:06:34,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:06:34,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2020-11-07 02:06:34,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2307, Invalid=7005, Unknown=0, NotChecked=0, Total=9312 [2020-11-07 02:06:34,233 INFO L87 Difference]: Start difference. First operand 330 states and 335 transitions. Second operand 97 states. [2020-11-07 02:06:58,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:06:58,717 INFO L93 Difference]: Finished difference Result 379 states and 389 transitions. [2020-11-07 02:06:58,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2020-11-07 02:06:58,721 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 319 [2020-11-07 02:06:58,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:06:58,723 INFO L225 Difference]: With dead ends: 379 [2020-11-07 02:06:58,723 INFO L226 Difference]: Without dead ends: 340 [2020-11-07 02:06:58,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6618 ImplicationChecksByTransitivity, 46.7s TimeCoverageRelationStatistics Valid=11015, Invalid=25275, Unknown=0, NotChecked=0, Total=36290 [2020-11-07 02:06:58,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-11-07 02:06:58,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 336. [2020-11-07 02:06:58,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-11-07 02:06:58,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 341 transitions. [2020-11-07 02:06:58,797 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 341 transitions. Word has length 319 [2020-11-07 02:06:58,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:06:58,797 INFO L481 AbstractCegarLoop]: Abstraction has 336 states and 341 transitions. [2020-11-07 02:06:58,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 97 states. [2020-11-07 02:06:58,797 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 341 transitions. [2020-11-07 02:06:58,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-11-07 02:06:58,798 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:06:58,799 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 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] [2020-11-07 02:06:58,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-11-07 02:06:58,799 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:06:58,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:06:58,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1560762760, now seen corresponding path program 46 times [2020-11-07 02:06:58,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:06:58,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [557138090] [2020-11-07 02:06:58,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:06:59,132 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:06:59,133 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:06:59,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:06:59,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:06:59,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:06:59,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 02:06:59,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:07:26,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:07:26,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [557138090] [2020-11-07 02:07:26,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:07:26,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2020-11-07 02:07:26,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217582300] [2020-11-07 02:07:26,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 99 states [2020-11-07 02:07:26,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:07:26,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2020-11-07 02:07:26,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2404, Invalid=7298, Unknown=0, NotChecked=0, Total=9702 [2020-11-07 02:07:26,123 INFO L87 Difference]: Start difference. First operand 336 states and 341 transitions. Second operand 99 states. [2020-11-07 02:07:27,307 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-11-07 02:07:54,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:07:54,599 INFO L93 Difference]: Finished difference Result 385 states and 395 transitions. [2020-11-07 02:07:54,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2020-11-07 02:07:54,602 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 325 [2020-11-07 02:07:54,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:07:54,604 INFO L225 Difference]: With dead ends: 385 [2020-11-07 02:07:54,604 INFO L226 Difference]: Without dead ends: 346 [2020-11-07 02:07:54,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6903 ImplicationChecksByTransitivity, 51.9s TimeCoverageRelationStatistics Valid=11489, Invalid=26341, Unknown=0, NotChecked=0, Total=37830 [2020-11-07 02:07:54,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-11-07 02:07:54,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 342. [2020-11-07 02:07:54,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342 states. [2020-11-07 02:07:54,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 347 transitions. [2020-11-07 02:07:54,707 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 347 transitions. Word has length 325 [2020-11-07 02:07:54,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:07:54,707 INFO L481 AbstractCegarLoop]: Abstraction has 342 states and 347 transitions. [2020-11-07 02:07:54,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 99 states. [2020-11-07 02:07:54,708 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 347 transitions. [2020-11-07 02:07:54,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-11-07 02:07:54,710 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:07:54,710 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 47, 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] [2020-11-07 02:07:54,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-11-07 02:07:54,710 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:07:54,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:07:54,711 INFO L82 PathProgramCache]: Analyzing trace with hash 418165828, now seen corresponding path program 47 times [2020-11-07 02:07:54,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:07:54,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105714142] [2020-11-07 02:07:54,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:07:54,822 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-11-07 02:07:55,096 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:07:55,097 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:07:55,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:07:55,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:07:55,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:07:55,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 02:07:55,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:21,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:08:21,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105714142] [2020-11-07 02:08:21,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:08:21,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2020-11-07 02:08:21,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129943320] [2020-11-07 02:08:21,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 101 states [2020-11-07 02:08:21,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:08:21,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2020-11-07 02:08:21,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2503, Invalid=7597, Unknown=0, NotChecked=0, Total=10100 [2020-11-07 02:08:21,997 INFO L87 Difference]: Start difference. First operand 342 states and 347 transitions. Second operand 101 states. [2020-11-07 02:08:51,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:08:51,062 INFO L93 Difference]: Finished difference Result 391 states and 401 transitions. [2020-11-07 02:08:51,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2020-11-07 02:08:51,067 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 331 [2020-11-07 02:08:51,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:08:51,069 INFO L225 Difference]: With dead ends: 391 [2020-11-07 02:08:51,069 INFO L226 Difference]: Without dead ends: 352 [2020-11-07 02:08:51,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7194 ImplicationChecksByTransitivity, 52.3s TimeCoverageRelationStatistics Valid=11973, Invalid=27429, Unknown=0, NotChecked=0, Total=39402 [2020-11-07 02:08:51,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-11-07 02:08:51,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 348. [2020-11-07 02:08:51,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2020-11-07 02:08:51,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 353 transitions. [2020-11-07 02:08:51,167 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 353 transitions. Word has length 331 [2020-11-07 02:08:51,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:08:51,167 INFO L481 AbstractCegarLoop]: Abstraction has 348 states and 353 transitions. [2020-11-07 02:08:51,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 101 states. [2020-11-07 02:08:51,168 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 353 transitions. [2020-11-07 02:08:51,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-11-07 02:08:51,169 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:08:51,170 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 48, 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] [2020-11-07 02:08:51,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-11-07 02:08:51,170 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:08:51,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:08:51,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1593446912, now seen corresponding path program 48 times [2020-11-07 02:08:51,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:08:51,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1609106540] [2020-11-07 02:08:51,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:08:51,293 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-11-07 02:08:51,572 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:08:51,574 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:08:51,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:51,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:08:51,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:51,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 02:08:51,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:52,138 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:52,306 WARN L194 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:52,469 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:52,642 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:52,809 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:57,266 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:57,539 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:09:06,622 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12