/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_12.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 06:48:59,080 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 06:48:59,085 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 06:48:59,156 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-07 06:48:59,196 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 06:48:59,200 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 06:48:59,204 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 06:48:59,206 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 06:48:59,208 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 06:48:59,213 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 06:48:59,248 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 06:48:59,253 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 06:48:59,259 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 06:48:59,275 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 06:48:59,278 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 06:48:59,279 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 06:48:59,282 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 06:48:59,304 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 06:48:59,305 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 06:48:59,306 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 06:48:59,307 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 06:48:59,334 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 06:48:59,335 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 06:48:59,337 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 06:48:59,337 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 06:48:59,338 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 06:48:59,338 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 06:48:59,338 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 06:48:59,338 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 06:48:59,339 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 06:48:59,339 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 06:48:59,339 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 06:48:59,339 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 06:48:59,340 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 06:48:59,340 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 06:48:59,340 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 06:48:59,340 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 06:48:59,341 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 06:48:59,341 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 06:48:59,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 06:48:59,341 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 06:48:59,342 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 06:48:59,342 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 06:48:59,342 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 06:48:59,744 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 06:48:59,783 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 06:48:59,787 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 06:48:59,789 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 06:48:59,790 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 06:48:59,792 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_12.c [2020-11-07 06:48:59,900 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e29f24f4a/648489e847bf4558b3ac630d78ff8115/FLAGd55f84867 [2020-11-07 06:49:00,527 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 06:49:00,528 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_12.c [2020-11-07 06:49:00,536 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e29f24f4a/648489e847bf4558b3ac630d78ff8115/FLAGd55f84867 [2020-11-07 06:49:00,873 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e29f24f4a/648489e847bf4558b3ac630d78ff8115 [2020-11-07 06:49:00,876 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 06:49:00,883 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 06:49:00,884 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 06:49:00,885 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 06:49:00,889 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 06:49:00,890 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:49:00" (1/1) ... [2020-11-07 06:49:00,893 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2da04b05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:49:00, skipping insertion in model container [2020-11-07 06:49:00,894 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:49:00" (1/1) ... [2020-11-07 06:49:00,903 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 06:49:00,919 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 06:49:01,083 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:49:01,096 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 06:49:01,114 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:49:01,130 INFO L208 MainTranslator]: Completed translation [2020-11-07 06:49:01,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:49:01 WrapperNode [2020-11-07 06:49:01,131 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 06:49:01,132 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 06:49:01,133 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 06:49:01,133 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 06:49:01,146 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:49:01" (1/1) ... [2020-11-07 06:49:01,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:49:01" (1/1) ... [2020-11-07 06:49:01,153 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:49:01" (1/1) ... [2020-11-07 06:49:01,154 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:49:01" (1/1) ... [2020-11-07 06:49:01,160 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:49:01" (1/1) ... [2020-11-07 06:49:01,165 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:49:01" (1/1) ... [2020-11-07 06:49:01,166 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:49:01" (1/1) ... [2020-11-07 06:49:01,168 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 06:49:01,170 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 06:49:01,170 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 06:49:01,170 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 06:49:01,171 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:49:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 06:49:01,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 06:49:01,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 06:49:01,295 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 06:49:01,295 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 06:49:01,295 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 06:49:01,295 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 06:49:01,295 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 06:49:01,296 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 06:49:01,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 06:49:01,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 06:49:01,296 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 06:49:01,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 06:49:01,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 06:49:01,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 06:49:01,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 06:49:01,297 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 06:49:01,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 06:49:01,651 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 06:49:01,651 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-07 06:49:01,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:49:01 BoogieIcfgContainer [2020-11-07 06:49:01,653 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 06:49:01,656 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 06:49:01,656 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 06:49:01,660 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 06:49:01,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:49:00" (1/3) ... [2020-11-07 06:49:01,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@437dd6ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:49:01, skipping insertion in model container [2020-11-07 06:49:01,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:49:01" (2/3) ... [2020-11-07 06:49:01,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@437dd6ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:49:01, skipping insertion in model container [2020-11-07 06:49:01,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:49:01" (3/3) ... [2020-11-07 06:49:01,665 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_12.c [2020-11-07 06:49:01,684 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 06:49:01,688 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 06:49:01,704 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 06:49:01,734 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 06:49:01,734 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 06:49:01,735 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 06:49:01,735 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 06:49:01,735 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 06:49:01,735 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 06:49:01,735 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 06:49:01,736 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 06:49:01,757 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-11-07 06:49:01,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-07 06:49:01,768 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:49:01,769 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] [2020-11-07 06:49:01,770 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:49:01,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:49:01,778 INFO L82 PathProgramCache]: Analyzing trace with hash -901635656, now seen corresponding path program 1 times [2020-11-07 06:49:01,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:49:01,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1826533100] [2020-11-07 06:49:01,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:49:01,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:49:02,231 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-11-07 06:49:02,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:49:02,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:49:02,283 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 06:49:02,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1826533100] [2020-11-07 06:49:02,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:49:02,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-07 06:49:02,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455027234] [2020-11-07 06:49:02,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-07 06:49:02,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:49:02,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-07 06:49:02,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 06:49:02,326 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-11-07 06:49:02,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:49:02,430 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2020-11-07 06:49:02,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-07 06:49:02,433 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-11-07 06:49:02,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:49:02,442 INFO L225 Difference]: With dead ends: 50 [2020-11-07 06:49:02,442 INFO L226 Difference]: Without dead ends: 27 [2020-11-07 06:49:02,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 06:49:02,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-07 06:49:02,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-07 06:49:02,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-07 06:49:02,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-11-07 06:49:02,502 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 21 [2020-11-07 06:49:02,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:49:02,503 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-11-07 06:49:02,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-07 06:49:02,503 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-11-07 06:49:02,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-07 06:49:02,505 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:49:02,505 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] [2020-11-07 06:49:02,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 06:49:02,506 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:49:02,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:49:02,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1302443770, now seen corresponding path program 1 times [2020-11-07 06:49:02,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:49:02,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [266580452] [2020-11-07 06:49:02,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:49:02,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:49:02,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:49:02,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:49:02,736 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 06:49:02,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [266580452] [2020-11-07 06:49:02,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:49:02,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 06:49:02,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117315810] [2020-11-07 06:49:02,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 06:49:02,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:49:02,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 06:49:02,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 06:49:02,742 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 6 states. [2020-11-07 06:49:03,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:49:03,045 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-11-07 06:49:03,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 06:49:03,045 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-11-07 06:49:03,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:49:03,047 INFO L225 Difference]: With dead ends: 39 [2020-11-07 06:49:03,047 INFO L226 Difference]: Without dead ends: 33 [2020-11-07 06:49:03,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-11-07 06:49:03,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-07 06:49:03,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-11-07 06:49:03,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-07 06:49:03,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-11-07 06:49:03,068 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 21 [2020-11-07 06:49:03,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:49:03,069 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-11-07 06:49:03,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 06:49:03,069 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-11-07 06:49:03,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-07 06:49:03,070 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:49:03,070 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] [2020-11-07 06:49:03,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 06:49:03,071 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:49:03,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:49:03,072 INFO L82 PathProgramCache]: Analyzing trace with hash 642832942, now seen corresponding path program 1 times [2020-11-07 06:49:03,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:49:03,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [582282085] [2020-11-07 06:49:03,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:49:03,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:49:03,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:49:03,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:49:03,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:49:03,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [582282085] [2020-11-07 06:49:03,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:49:03,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 06:49:03,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704919515] [2020-11-07 06:49:03,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 06:49:03,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:49:03,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 06:49:03,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 06:49:03,191 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 4 states. [2020-11-07 06:49:03,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:49:03,297 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-11-07 06:49:03,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 06:49:03,298 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-11-07 06:49:03,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:49:03,299 INFO L225 Difference]: With dead ends: 48 [2020-11-07 06:49:03,299 INFO L226 Difference]: Without dead ends: 36 [2020-11-07 06:49:03,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 06:49:03,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-07 06:49:03,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-11-07 06:49:03,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-07 06:49:03,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-11-07 06:49:03,315 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 27 [2020-11-07 06:49:03,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:49:03,316 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-11-07 06:49:03,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 06:49:03,316 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-11-07 06:49:03,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-07 06:49:03,317 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:49:03,318 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-11-07 06:49:03,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 06:49:03,318 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:49:03,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:49:03,319 INFO L82 PathProgramCache]: Analyzing trace with hash -466055855, now seen corresponding path program 1 times [2020-11-07 06:49:03,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:49:03,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2046138318] [2020-11-07 06:49:03,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:49:03,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:49:03,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:49:03,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:49:03,528 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:49:03,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2046138318] [2020-11-07 06:49:03,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:49:03,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-11-07 06:49:03,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779507124] [2020-11-07 06:49:03,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 06:49:03,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:49:03,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 06:49:03,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-07 06:49:03,533 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 6 states. [2020-11-07 06:49:03,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:49:03,788 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2020-11-07 06:49:03,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 06:49:03,788 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2020-11-07 06:49:03,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:49:03,790 INFO L225 Difference]: With dead ends: 53 [2020-11-07 06:49:03,790 INFO L226 Difference]: Without dead ends: 41 [2020-11-07 06:49:03,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-11-07 06:49:03,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-11-07 06:49:03,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2020-11-07 06:49:03,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-07 06:49:03,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-11-07 06:49:03,803 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 32 [2020-11-07 06:49:03,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:49:03,804 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-11-07 06:49:03,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 06:49:03,804 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-11-07 06:49:03,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-07 06:49:03,806 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:49:03,806 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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 06:49:03,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 06:49:03,806 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:49:03,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:49:03,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1843550222, now seen corresponding path program 2 times [2020-11-07 06:49:03,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:49:03,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [737520912] [2020-11-07 06:49:03,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:49:03,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:49:03,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:49:03,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:49:04,007 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:49:04,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [737520912] [2020-11-07 06:49:04,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:49:04,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-07 06:49:04,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923310282] [2020-11-07 06:49:04,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 06:49:04,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:49:04,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 06:49:04,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-11-07 06:49:04,014 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 8 states. [2020-11-07 06:49:04,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:49:04,391 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2020-11-07 06:49:04,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-07 06:49:04,392 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-11-07 06:49:04,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:49:04,393 INFO L225 Difference]: With dead ends: 58 [2020-11-07 06:49:04,393 INFO L226 Difference]: Without dead ends: 46 [2020-11-07 06:49:04,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2020-11-07 06:49:04,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-07 06:49:04,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-11-07 06:49:04,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-07 06:49:04,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-11-07 06:49:04,408 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 37 [2020-11-07 06:49:04,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:49:04,409 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-11-07 06:49:04,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 06:49:04,409 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-11-07 06:49:04,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-07 06:49:04,410 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:49:04,411 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 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 06:49:04,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 06:49:04,411 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:49:04,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:49:04,412 INFO L82 PathProgramCache]: Analyzing trace with hash 2068495217, now seen corresponding path program 3 times [2020-11-07 06:49:04,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:49:04,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1047715729] [2020-11-07 06:49:04,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:49:04,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:49:04,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:49:04,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:49:04,617 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:49:04,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1047715729] [2020-11-07 06:49:04,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:49:04,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-11-07 06:49:04,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440237416] [2020-11-07 06:49:04,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-07 06:49:04,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:49:04,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-07 06:49:04,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-11-07 06:49:04,620 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 10 states. [2020-11-07 06:49:05,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:49:05,174 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2020-11-07 06:49:05,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-07 06:49:05,175 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2020-11-07 06:49:05,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:49:05,176 INFO L225 Difference]: With dead ends: 63 [2020-11-07 06:49:05,176 INFO L226 Difference]: Without dead ends: 51 [2020-11-07 06:49:05,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-11-07 06:49:05,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-07 06:49:05,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-11-07 06:49:05,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-07 06:49:05,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-11-07 06:49:05,191 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 42 [2020-11-07 06:49:05,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:49:05,191 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-11-07 06:49:05,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-07 06:49:05,192 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-11-07 06:49:05,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-07 06:49:05,193 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:49:05,193 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 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 06:49:05,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 06:49:05,194 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:49:05,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:49:05,195 INFO L82 PathProgramCache]: Analyzing trace with hash 664272366, now seen corresponding path program 4 times [2020-11-07 06:49:05,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:49:05,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040993330] [2020-11-07 06:49:05,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:49:05,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:49:05,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:49:05,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:49:05,458 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:49:05,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040993330] [2020-11-07 06:49:05,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:49:05,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-11-07 06:49:05,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689175694] [2020-11-07 06:49:05,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 06:49:05,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:49:05,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 06:49:05,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-11-07 06:49:05,461 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 12 states. [2020-11-07 06:49:06,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:49:06,361 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2020-11-07 06:49:06,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-07 06:49:06,363 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-11-07 06:49:06,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:49:06,365 INFO L225 Difference]: With dead ends: 68 [2020-11-07 06:49:06,365 INFO L226 Difference]: Without dead ends: 56 [2020-11-07 06:49:06,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2020-11-07 06:49:06,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-11-07 06:49:06,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2020-11-07 06:49:06,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-07 06:49:06,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-11-07 06:49:06,382 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 47 [2020-11-07 06:49:06,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:49:06,383 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-11-07 06:49:06,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 06:49:06,383 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-11-07 06:49:06,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-11-07 06:49:06,384 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:49:06,384 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 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 06:49:06,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 06:49:06,385 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:49:06,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:49:06,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1735278191, now seen corresponding path program 5 times [2020-11-07 06:49:06,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:49:06,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571510607] [2020-11-07 06:49:06,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:49:06,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:49:06,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:49:06,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:49:06,706 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 21 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:49:06,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571510607] [2020-11-07 06:49:06,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:49:06,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-11-07 06:49:06,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192332949] [2020-11-07 06:49:06,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-07 06:49:06,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:49:06,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-07 06:49:06,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-11-07 06:49:06,709 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 14 states. [2020-11-07 06:49:07,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:49:07,898 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2020-11-07 06:49:07,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-07 06:49:07,899 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-11-07 06:49:07,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:49:07,901 INFO L225 Difference]: With dead ends: 73 [2020-11-07 06:49:07,901 INFO L226 Difference]: Without dead ends: 61 [2020-11-07 06:49:07,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2020-11-07 06:49:07,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-11-07 06:49:07,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2020-11-07 06:49:07,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-07 06:49:07,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-11-07 06:49:07,936 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 52 [2020-11-07 06:49:07,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:49:07,936 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-11-07 06:49:07,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-07 06:49:07,937 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-11-07 06:49:07,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-11-07 06:49:07,938 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:49:07,938 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 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 06:49:07,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 06:49:07,939 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:49:07,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:49:07,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1302344754, now seen corresponding path program 6 times [2020-11-07 06:49:07,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:49:07,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917510536] [2020-11-07 06:49:07,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:49:07,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:49:08,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:49:08,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:49:08,347 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 25 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:49:08,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917510536] [2020-11-07 06:49:08,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:49:08,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-11-07 06:49:08,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183819119] [2020-11-07 06:49:08,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-07 06:49:08,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:49:08,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-07 06:49:08,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-11-07 06:49:08,351 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 16 states. [2020-11-07 06:49:09,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:49:09,896 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2020-11-07 06:49:09,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-07 06:49:09,896 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 57 [2020-11-07 06:49:09,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:49:09,899 INFO L225 Difference]: With dead ends: 78 [2020-11-07 06:49:09,899 INFO L226 Difference]: Without dead ends: 66 [2020-11-07 06:49:09,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=170, Invalid=1020, Unknown=0, NotChecked=0, Total=1190 [2020-11-07 06:49:09,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-07 06:49:09,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-11-07 06:49:09,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-07 06:49:09,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-11-07 06:49:09,921 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 57 [2020-11-07 06:49:09,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:49:09,922 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-11-07 06:49:09,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-07 06:49:09,922 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-11-07 06:49:09,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-11-07 06:49:09,923 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:49:09,923 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 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 06:49:09,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-07 06:49:09,924 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:49:09,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:49:09,925 INFO L82 PathProgramCache]: Analyzing trace with hash 31432625, now seen corresponding path program 7 times [2020-11-07 06:49:09,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:49:09,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052315008] [2020-11-07 06:49:09,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:49:09,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:49:10,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:49:10,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:49:10,400 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 29 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:49:10,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052315008] [2020-11-07 06:49:10,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:49:10,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-11-07 06:49:10,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975908666] [2020-11-07 06:49:10,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-07 06:49:10,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:49:10,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-07 06:49:10,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-11-07 06:49:10,404 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 18 states. [2020-11-07 06:49:12,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:49:12,179 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2020-11-07 06:49:12,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-07 06:49:12,180 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 62 [2020-11-07 06:49:12,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:49:12,181 INFO L225 Difference]: With dead ends: 83 [2020-11-07 06:49:12,181 INFO L226 Difference]: Without dead ends: 71 [2020-11-07 06:49:12,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=197, Invalid=1363, Unknown=0, NotChecked=0, Total=1560 [2020-11-07 06:49:12,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-11-07 06:49:12,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2020-11-07 06:49:12,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-11-07 06:49:12,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-11-07 06:49:12,207 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 62 [2020-11-07 06:49:12,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:49:12,208 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-11-07 06:49:12,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-07 06:49:12,208 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-11-07 06:49:12,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-11-07 06:49:12,209 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:49:12,210 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 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 06:49:12,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-07 06:49:12,210 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:49:12,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:49:12,211 INFO L82 PathProgramCache]: Analyzing trace with hash 463978926, now seen corresponding path program 8 times [2020-11-07 06:49:12,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:49:12,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090871081] [2020-11-07 06:49:12,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:49:12,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:49:12,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:49:12,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:49:12,805 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 33 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:49:12,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090871081] [2020-11-07 06:49:12,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:49:12,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-11-07 06:49:12,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128336685] [2020-11-07 06:49:12,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-07 06:49:12,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:49:12,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-07 06:49:12,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-11-07 06:49:12,812 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 20 states. [2020-11-07 06:49:14,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:49:14,951 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2020-11-07 06:49:14,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-07 06:49:14,952 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 67 [2020-11-07 06:49:14,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:49:14,959 INFO L225 Difference]: With dead ends: 88 [2020-11-07 06:49:14,959 INFO L226 Difference]: Without dead ends: 76 [2020-11-07 06:49:14,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=224, Invalid=1756, Unknown=0, NotChecked=0, Total=1980 [2020-11-07 06:49:14,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-11-07 06:49:14,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2020-11-07 06:49:14,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-11-07 06:49:15,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-11-07 06:49:15,000 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 67 [2020-11-07 06:49:15,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:49:15,000 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-11-07 06:49:15,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-07 06:49:15,001 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-11-07 06:49:15,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-11-07 06:49:15,003 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:49:15,008 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 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 06:49:15,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-07 06:49:15,008 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:49:15,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:49:15,009 INFO L82 PathProgramCache]: Analyzing trace with hash -561621551, now seen corresponding path program 9 times [2020-11-07 06:49:15,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:49:15,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1807502117] [2020-11-07 06:49:15,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:49:15,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:49:15,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:49:15,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:49:15,645 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 37 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:49:15,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1807502117] [2020-11-07 06:49:15,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:49:15,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-11-07 06:49:15,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448274330] [2020-11-07 06:49:15,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-07 06:49:15,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:49:15,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-07 06:49:15,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2020-11-07 06:49:15,648 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 22 states. [2020-11-07 06:49:18,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:49:18,093 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2020-11-07 06:49:18,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-07 06:49:18,094 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 72 [2020-11-07 06:49:18,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:49:18,096 INFO L225 Difference]: With dead ends: 93 [2020-11-07 06:49:18,096 INFO L226 Difference]: Without dead ends: 81 [2020-11-07 06:49:18,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=251, Invalid=2199, Unknown=0, NotChecked=0, Total=2450 [2020-11-07 06:49:18,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-11-07 06:49:18,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2020-11-07 06:49:18,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-11-07 06:49:18,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2020-11-07 06:49:18,118 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 72 [2020-11-07 06:49:18,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:49:18,118 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2020-11-07 06:49:18,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-07 06:49:18,119 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2020-11-07 06:49:18,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-11-07 06:49:18,120 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:49:18,120 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 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 06:49:18,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-07 06:49:18,124 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:49:18,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:49:18,125 INFO L82 PathProgramCache]: Analyzing trace with hash -10625138, now seen corresponding path program 10 times [2020-11-07 06:49:18,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:49:18,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1003012351] [2020-11-07 06:49:18,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:49:18,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:49:18,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:49:18,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:49:18,918 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 41 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:49:18,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1003012351] [2020-11-07 06:49:18,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:49:18,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-11-07 06:49:18,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549444518] [2020-11-07 06:49:18,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-07 06:49:18,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:49:18,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-07 06:49:18,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2020-11-07 06:49:18,923 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 24 states. [2020-11-07 06:49:21,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:49:21,701 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2020-11-07 06:49:21,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-07 06:49:21,702 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 77 [2020-11-07 06:49:21,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:49:21,703 INFO L225 Difference]: With dead ends: 98 [2020-11-07 06:49:21,704 INFO L226 Difference]: Without dead ends: 86 [2020-11-07 06:49:21,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=278, Invalid=2692, Unknown=0, NotChecked=0, Total=2970 [2020-11-07 06:49:21,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-11-07 06:49:21,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2020-11-07 06:49:21,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-11-07 06:49:21,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-11-07 06:49:21,729 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 77 [2020-11-07 06:49:21,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:49:21,730 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-11-07 06:49:21,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-07 06:49:21,730 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-11-07 06:49:21,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-11-07 06:49:21,731 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:49:21,731 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 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 06:49:21,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-07 06:49:21,731 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:49:21,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:49:21,732 INFO L82 PathProgramCache]: Analyzing trace with hash -682105871, now seen corresponding path program 11 times [2020-11-07 06:49:21,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:49:21,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087589130] [2020-11-07 06:49:21,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:49:21,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:49:22,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:49:22,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:49:22,554 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:49:22,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087589130] [2020-11-07 06:49:22,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:49:22,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-11-07 06:49:22,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134120488] [2020-11-07 06:49:22,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-07 06:49:22,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:49:22,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-07 06:49:22,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2020-11-07 06:49:22,558 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 26 states. [2020-11-07 06:49:25,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:49:25,865 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2020-11-07 06:49:25,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-07 06:49:25,866 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 82 [2020-11-07 06:49:25,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:49:25,867 INFO L225 Difference]: With dead ends: 103 [2020-11-07 06:49:25,867 INFO L226 Difference]: Without dead ends: 91 [2020-11-07 06:49:25,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=305, Invalid=3235, Unknown=0, NotChecked=0, Total=3540 [2020-11-07 06:49:25,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-11-07 06:49:25,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2020-11-07 06:49:25,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-11-07 06:49:25,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2020-11-07 06:49:25,891 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 82 [2020-11-07 06:49:25,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:49:25,891 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2020-11-07 06:49:25,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-07 06:49:25,891 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2020-11-07 06:49:25,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-11-07 06:49:25,892 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:49:25,892 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 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 06:49:25,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-07 06:49:25,893 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:49:25,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:49:25,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1743791470, now seen corresponding path program 12 times [2020-11-07 06:49:25,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:49:25,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561391166] [2020-11-07 06:49:25,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:49:25,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:49:26,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:49:26,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:49:26,769 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 49 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:49:26,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561391166] [2020-11-07 06:49:26,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:49:26,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-11-07 06:49:26,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136642750] [2020-11-07 06:49:26,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-07 06:49:26,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:49:26,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-07 06:49:26,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-11-07 06:49:26,772 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand 28 states. [2020-11-07 06:49:30,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:49:30,572 INFO L93 Difference]: Finished difference Result 108 states and 112 transitions. [2020-11-07 06:49:30,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-07 06:49:30,573 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 87 [2020-11-07 06:49:30,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:49:30,574 INFO L225 Difference]: With dead ends: 108 [2020-11-07 06:49:30,575 INFO L226 Difference]: Without dead ends: 96 [2020-11-07 06:49:30,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=332, Invalid=3828, Unknown=0, NotChecked=0, Total=4160 [2020-11-07 06:49:30,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-11-07 06:49:30,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2020-11-07 06:49:30,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-11-07 06:49:30,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2020-11-07 06:49:30,597 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 87 [2020-11-07 06:49:30,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:49:30,598 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2020-11-07 06:49:30,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-07 06:49:30,598 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2020-11-07 06:49:30,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-11-07 06:49:30,598 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:49:30,599 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 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 06:49:30,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-07 06:49:30,599 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:49:30,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:49:30,600 INFO L82 PathProgramCache]: Analyzing trace with hash 916867601, now seen corresponding path program 13 times [2020-11-07 06:49:30,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:49:30,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1231122509] [2020-11-07 06:49:30,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:49:30,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:49:31,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:49:31,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:49:31,608 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 53 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:49:31,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1231122509] [2020-11-07 06:49:31,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:49:31,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-11-07 06:49:31,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525190451] [2020-11-07 06:49:31,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-07 06:49:31,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:49:31,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-07 06:49:31,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=800, Unknown=0, NotChecked=0, Total=870 [2020-11-07 06:49:31,611 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 30 states. [2020-11-07 06:49:35,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:49:35,910 INFO L93 Difference]: Finished difference Result 113 states and 117 transitions. [2020-11-07 06:49:35,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-07 06:49:35,910 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 92 [2020-11-07 06:49:35,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:49:35,911 INFO L225 Difference]: With dead ends: 113 [2020-11-07 06:49:35,912 INFO L226 Difference]: Without dead ends: 101 [2020-11-07 06:49:35,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=359, Invalid=4471, Unknown=0, NotChecked=0, Total=4830 [2020-11-07 06:49:35,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-11-07 06:49:35,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2020-11-07 06:49:35,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-11-07 06:49:35,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2020-11-07 06:49:35,934 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 92 [2020-11-07 06:49:35,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:49:35,935 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2020-11-07 06:49:35,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-11-07 06:49:35,935 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2020-11-07 06:49:35,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-11-07 06:49:35,936 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:49:35,937 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 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 06:49:35,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-07 06:49:35,937 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:49:35,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:49:35,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1370713266, now seen corresponding path program 14 times [2020-11-07 06:49:35,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:49:35,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602614634] [2020-11-07 06:49:35,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:49:35,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:49:37,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:49:37,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:49:37,056 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 57 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:49:37,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602614634] [2020-11-07 06:49:37,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:49:37,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-11-07 06:49:37,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487468155] [2020-11-07 06:49:37,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-11-07 06:49:37,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:49:37,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-11-07 06:49:37,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=917, Unknown=0, NotChecked=0, Total=992 [2020-11-07 06:49:37,059 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand 32 states. [2020-11-07 06:49:41,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:49:41,895 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2020-11-07 06:49:41,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-07 06:49:41,896 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 97 [2020-11-07 06:49:41,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:49:41,897 INFO L225 Difference]: With dead ends: 118 [2020-11-07 06:49:41,897 INFO L226 Difference]: Without dead ends: 106 [2020-11-07 06:49:41,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=386, Invalid=5164, Unknown=0, NotChecked=0, Total=5550 [2020-11-07 06:49:41,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-11-07 06:49:41,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2020-11-07 06:49:41,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-11-07 06:49:41,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2020-11-07 06:49:41,923 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 97 [2020-11-07 06:49:41,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:49:41,924 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2020-11-07 06:49:41,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-11-07 06:49:41,924 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2020-11-07 06:49:41,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-11-07 06:49:41,925 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:49:41,925 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 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 06:49:41,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-11-07 06:49:41,926 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:49:41,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:49:41,926 INFO L82 PathProgramCache]: Analyzing trace with hash 138643505, now seen corresponding path program 15 times [2020-11-07 06:49:41,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:49:41,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2095083867] [2020-11-07 06:49:41,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:49:41,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:49:43,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:49:43,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:49:43,142 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 61 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:49:43,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2095083867] [2020-11-07 06:49:43,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:49:43,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-11-07 06:49:43,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984718886] [2020-11-07 06:49:43,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-11-07 06:49:43,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:49:43,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-11-07 06:49:43,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1042, Unknown=0, NotChecked=0, Total=1122 [2020-11-07 06:49:43,153 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 34 states. [2020-11-07 06:49:48,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:49:48,538 INFO L93 Difference]: Finished difference Result 123 states and 127 transitions. [2020-11-07 06:49:48,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-11-07 06:49:48,539 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 102 [2020-11-07 06:49:48,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:49:48,541 INFO L225 Difference]: With dead ends: 123 [2020-11-07 06:49:48,541 INFO L226 Difference]: Without dead ends: 111 [2020-11-07 06:49:48,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=413, Invalid=5907, Unknown=0, NotChecked=0, Total=6320 [2020-11-07 06:49:48,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-11-07 06:49:48,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2020-11-07 06:49:48,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-11-07 06:49:48,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2020-11-07 06:49:48,564 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 102 [2020-11-07 06:49:48,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:49:48,565 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2020-11-07 06:49:48,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-11-07 06:49:48,565 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2020-11-07 06:49:48,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-11-07 06:49:48,566 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:49:48,566 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 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 06:49:48,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-11-07 06:49:48,567 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:49:48,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:49:48,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1507928366, now seen corresponding path program 16 times [2020-11-07 06:49:48,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:49:48,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691186775] [2020-11-07 06:49:48,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:49:48,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:49:49,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:49:49,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:49:49,905 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 65 proven. 632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:49:49,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691186775] [2020-11-07 06:49:49,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:49:49,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-11-07 06:49:49,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146337245] [2020-11-07 06:49:49,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-11-07 06:49:49,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:49:49,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-11-07 06:49:49,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2020-11-07 06:49:49,909 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand 36 states. [2020-11-07 06:49:56,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:49:56,008 INFO L93 Difference]: Finished difference Result 128 states and 132 transitions. [2020-11-07 06:49:56,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-07 06:49:56,009 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 107 [2020-11-07 06:49:56,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:49:56,011 INFO L225 Difference]: With dead ends: 128 [2020-11-07 06:49:56,012 INFO L226 Difference]: Without dead ends: 116 [2020-11-07 06:49:56,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=440, Invalid=6700, Unknown=0, NotChecked=0, Total=7140 [2020-11-07 06:49:56,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-11-07 06:49:56,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 114. [2020-11-07 06:49:56,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-11-07 06:49:56,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2020-11-07 06:49:56,035 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 107 [2020-11-07 06:49:56,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:49:56,036 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2020-11-07 06:49:56,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-11-07 06:49:56,036 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2020-11-07 06:49:56,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-11-07 06:49:56,037 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:49:56,038 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 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 06:49:56,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-11-07 06:49:56,038 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:49:56,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:49:56,038 INFO L82 PathProgramCache]: Analyzing trace with hash 964795985, now seen corresponding path program 17 times [2020-11-07 06:49:56,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:49:56,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213839626] [2020-11-07 06:49:56,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:49:56,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:49:57,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:49:57,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:49:57,593 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 69 proven. 714 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:49:57,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213839626] [2020-11-07 06:49:57,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:49:57,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-11-07 06:49:57,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061956468] [2020-11-07 06:49:57,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-11-07 06:49:57,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:49:57,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-11-07 06:49:57,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1316, Unknown=0, NotChecked=0, Total=1406 [2020-11-07 06:49:57,596 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 38 states. [2020-11-07 06:50:04,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:50:04,267 INFO L93 Difference]: Finished difference Result 133 states and 137 transitions. [2020-11-07 06:50:04,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-11-07 06:50:04,268 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 112 [2020-11-07 06:50:04,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:50:04,270 INFO L225 Difference]: With dead ends: 133 [2020-11-07 06:50:04,270 INFO L226 Difference]: Without dead ends: 121 [2020-11-07 06:50:04,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1327 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=467, Invalid=7543, Unknown=0, NotChecked=0, Total=8010 [2020-11-07 06:50:04,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-11-07 06:50:04,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2020-11-07 06:50:04,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-11-07 06:50:04,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2020-11-07 06:50:04,294 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 112 [2020-11-07 06:50:04,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:50:04,295 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2020-11-07 06:50:04,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-11-07 06:50:04,295 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2020-11-07 06:50:04,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-11-07 06:50:04,296 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:50:04,296 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 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 06:50:04,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-11-07 06:50:04,297 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:50:04,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:50:04,297 INFO L82 PathProgramCache]: Analyzing trace with hash 10217230, now seen corresponding path program 18 times [2020-11-07 06:50:04,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:50:04,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1433964296] [2020-11-07 06:50:04,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:50:04,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:50:05,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:50:05,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:50:06,030 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 73 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:50:06,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1433964296] [2020-11-07 06:50:06,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:50:06,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-11-07 06:50:06,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802078110] [2020-11-07 06:50:06,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-11-07 06:50:06,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:50:06,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-11-07 06:50:06,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1465, Unknown=0, NotChecked=0, Total=1560 [2020-11-07 06:50:06,038 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 40 states. [2020-11-07 06:50:13,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:50:13,265 INFO L93 Difference]: Finished difference Result 138 states and 142 transitions. [2020-11-07 06:50:13,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-11-07 06:50:13,265 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 117 [2020-11-07 06:50:13,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:50:13,267 INFO L225 Difference]: With dead ends: 138 [2020-11-07 06:50:13,267 INFO L226 Difference]: Without dead ends: 126 [2020-11-07 06:50:13,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1486 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=494, Invalid=8436, Unknown=0, NotChecked=0, Total=8930 [2020-11-07 06:50:13,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-11-07 06:50:13,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2020-11-07 06:50:13,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-11-07 06:50:13,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2020-11-07 06:50:13,301 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 117 [2020-11-07 06:50:13,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:50:13,302 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2020-11-07 06:50:13,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-11-07 06:50:13,302 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2020-11-07 06:50:13,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-11-07 06:50:13,303 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:50:13,304 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 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 06:50:13,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-11-07 06:50:13,304 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:50:13,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:50:13,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1187869583, now seen corresponding path program 19 times [2020-11-07 06:50:13,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:50:13,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1776103917] [2020-11-07 06:50:13,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:50:13,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:50:15,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:50:15,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:50:15,186 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 77 proven. 893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:50:15,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1776103917] [2020-11-07 06:50:15,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:50:15,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-11-07 06:50:15,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337631116] [2020-11-07 06:50:15,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-11-07 06:50:15,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:50:15,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-11-07 06:50:15,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1622, Unknown=0, NotChecked=0, Total=1722 [2020-11-07 06:50:15,189 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand 42 states. [2020-11-07 06:50:23,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:50:23,299 INFO L93 Difference]: Finished difference Result 143 states and 147 transitions. [2020-11-07 06:50:23,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-11-07 06:50:23,304 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 122 [2020-11-07 06:50:23,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:50:23,305 INFO L225 Difference]: With dead ends: 143 [2020-11-07 06:50:23,306 INFO L226 Difference]: Without dead ends: 131 [2020-11-07 06:50:23,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1654 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=521, Invalid=9379, Unknown=0, NotChecked=0, Total=9900 [2020-11-07 06:50:23,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-11-07 06:50:23,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2020-11-07 06:50:23,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-11-07 06:50:23,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2020-11-07 06:50:23,336 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 122 [2020-11-07 06:50:23,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:50:23,336 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2020-11-07 06:50:23,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-11-07 06:50:23,337 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2020-11-07 06:50:23,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-11-07 06:50:23,338 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:50:23,338 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 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 06:50:23,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-11-07 06:50:23,339 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:50:23,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:50:23,339 INFO L82 PathProgramCache]: Analyzing trace with hash 652922094, now seen corresponding path program 20 times [2020-11-07 06:50:23,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:50:23,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1902324931] [2020-11-07 06:50:23,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:50:23,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:50:25,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:50:25,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:50:25,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 81 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:50:25,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1902324931] [2020-11-07 06:50:25,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:50:25,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-11-07 06:50:25,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294420835] [2020-11-07 06:50:25,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-11-07 06:50:25,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:50:25,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-11-07 06:50:25,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1787, Unknown=0, NotChecked=0, Total=1892 [2020-11-07 06:50:25,437 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand 44 states. [2020-11-07 06:50:34,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:50:34,480 INFO L93 Difference]: Finished difference Result 148 states and 152 transitions. [2020-11-07 06:50:34,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-11-07 06:50:34,481 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 127 [2020-11-07 06:50:34,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:50:34,483 INFO L225 Difference]: With dead ends: 148 [2020-11-07 06:50:34,483 INFO L226 Difference]: Without dead ends: 136 [2020-11-07 06:50:34,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=548, Invalid=10372, Unknown=0, NotChecked=0, Total=10920 [2020-11-07 06:50:34,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-11-07 06:50:34,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-11-07 06:50:34,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-11-07 06:50:34,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2020-11-07 06:50:34,515 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 127 [2020-11-07 06:50:34,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:50:34,515 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2020-11-07 06:50:34,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-11-07 06:50:34,516 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2020-11-07 06:50:34,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-11-07 06:50:34,517 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:50:34,517 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 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 06:50:34,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-11-07 06:50:34,518 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:50:34,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:50:34,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1750576495, now seen corresponding path program 21 times [2020-11-07 06:50:34,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:50:34,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125312059] [2020-11-07 06:50:34,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:50:34,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:50:36,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:50:36,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:50:36,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 85 proven. 1092 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:50:36,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125312059] [2020-11-07 06:50:36,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:50:36,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-11-07 06:50:36,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941719274] [2020-11-07 06:50:36,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-11-07 06:50:36,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:50:36,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-11-07 06:50:36,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1960, Unknown=0, NotChecked=0, Total=2070 [2020-11-07 06:50:36,832 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand 46 states. [2020-11-07 06:50:46,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:50:46,808 INFO L93 Difference]: Finished difference Result 153 states and 157 transitions. [2020-11-07 06:50:46,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-11-07 06:50:46,808 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 132 [2020-11-07 06:50:46,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:50:46,811 INFO L225 Difference]: With dead ends: 153 [2020-11-07 06:50:46,811 INFO L226 Difference]: Without dead ends: 141 [2020-11-07 06:50:46,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2017 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=575, Invalid=11415, Unknown=0, NotChecked=0, Total=11990 [2020-11-07 06:50:46,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-11-07 06:50:46,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 139. [2020-11-07 06:50:46,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-11-07 06:50:46,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 141 transitions. [2020-11-07 06:50:46,850 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 141 transitions. Word has length 132 [2020-11-07 06:50:46,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:50:46,850 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 141 transitions. [2020-11-07 06:50:46,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-11-07 06:50:46,850 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 141 transitions. [2020-11-07 06:50:46,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-11-07 06:50:46,852 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:50:46,852 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 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 06:50:46,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-11-07 06:50:46,852 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:50:46,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:50:46,853 INFO L82 PathProgramCache]: Analyzing trace with hash 532404942, now seen corresponding path program 22 times [2020-11-07 06:50:46,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:50:46,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [169559985] [2020-11-07 06:50:46,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:50:46,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:50:49,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:50:49,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:50:49,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 89 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:50:49,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [169559985] [2020-11-07 06:50:49,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:50:49,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-11-07 06:50:49,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852867887] [2020-11-07 06:50:49,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-11-07 06:50:49,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:50:49,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-11-07 06:50:49,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=2141, Unknown=0, NotChecked=0, Total=2256 [2020-11-07 06:50:49,300 INFO L87 Difference]: Start difference. First operand 139 states and 141 transitions. Second operand 48 states. [2020-11-07 06:51:00,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:51:00,108 INFO L93 Difference]: Finished difference Result 158 states and 162 transitions. [2020-11-07 06:51:00,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-11-07 06:51:00,109 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 137 [2020-11-07 06:51:00,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:51:00,111 INFO L225 Difference]: With dead ends: 158 [2020-11-07 06:51:00,111 INFO L226 Difference]: Without dead ends: 146 [2020-11-07 06:51:00,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2212 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=602, Invalid=12508, Unknown=0, NotChecked=0, Total=13110 [2020-11-07 06:51:00,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-11-07 06:51:00,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2020-11-07 06:51:00,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-11-07 06:51:00,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 146 transitions. [2020-11-07 06:51:00,156 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 146 transitions. Word has length 137 [2020-11-07 06:51:00,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:51:00,157 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 146 transitions. [2020-11-07 06:51:00,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-11-07 06:51:00,157 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 146 transitions. [2020-11-07 06:51:00,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-11-07 06:51:00,158 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:51:00,158 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 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 06:51:00,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-11-07 06:51:00,159 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:51:00,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:51:00,159 INFO L82 PathProgramCache]: Analyzing trace with hash 649392305, now seen corresponding path program 23 times [2020-11-07 06:51:00,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:51:00,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990227375] [2020-11-07 06:51:00,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:51:00,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:51:02,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:51:02,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:51:02,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 93 proven. 1311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:51:02,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990227375] [2020-11-07 06:51:02,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:51:02,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-11-07 06:51:02,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883078816] [2020-11-07 06:51:02,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-11-07 06:51:02,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:51:02,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-11-07 06:51:02,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=2330, Unknown=0, NotChecked=0, Total=2450 [2020-11-07 06:51:02,909 INFO L87 Difference]: Start difference. First operand 144 states and 146 transitions. Second operand 50 states. [2020-11-07 06:51:14,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:51:14,830 INFO L93 Difference]: Finished difference Result 163 states and 167 transitions. [2020-11-07 06:51:14,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-11-07 06:51:14,831 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 142 [2020-11-07 06:51:14,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:51:14,833 INFO L225 Difference]: With dead ends: 163 [2020-11-07 06:51:14,833 INFO L226 Difference]: Without dead ends: 151 [2020-11-07 06:51:14,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2416 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=629, Invalid=13651, Unknown=0, NotChecked=0, Total=14280 [2020-11-07 06:51:14,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-11-07 06:51:14,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 149. [2020-11-07 06:51:14,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-11-07 06:51:14,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2020-11-07 06:51:14,868 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 142 [2020-11-07 06:51:14,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:51:14,868 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2020-11-07 06:51:14,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-11-07 06:51:14,869 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2020-11-07 06:51:14,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-11-07 06:51:14,870 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:51:14,870 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 24, 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 06:51:14,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-11-07 06:51:14,870 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:51:14,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:51:14,871 INFO L82 PathProgramCache]: Analyzing trace with hash -327348050, now seen corresponding path program 24 times [2020-11-07 06:51:14,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:51:14,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054650539] [2020-11-07 06:51:14,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:51:14,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:51:17,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:51:17,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:51:17,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 97 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:51:17,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054650539] [2020-11-07 06:51:17,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:51:17,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-11-07 06:51:17,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18413592] [2020-11-07 06:51:17,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-11-07 06:51:17,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:51:17,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-11-07 06:51:17,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2527, Unknown=0, NotChecked=0, Total=2652 [2020-11-07 06:51:17,874 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand 52 states. [2020-11-07 06:51:30,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:51:30,955 INFO L93 Difference]: Finished difference Result 168 states and 172 transitions. [2020-11-07 06:51:30,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-11-07 06:51:30,956 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 147 [2020-11-07 06:51:30,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:51:30,961 INFO L225 Difference]: With dead ends: 168 [2020-11-07 06:51:30,961 INFO L226 Difference]: Without dead ends: 156 [2020-11-07 06:51:30,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2629 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=656, Invalid=14844, Unknown=0, NotChecked=0, Total=15500 [2020-11-07 06:51:30,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-11-07 06:51:30,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 154. [2020-11-07 06:51:30,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-11-07 06:51:31,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 156 transitions. [2020-11-07 06:51:31,000 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 156 transitions. Word has length 147 [2020-11-07 06:51:31,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:51:31,001 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 156 transitions. [2020-11-07 06:51:31,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-11-07 06:51:31,001 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 156 transitions. [2020-11-07 06:51:31,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-11-07 06:51:31,002 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:51:31,002 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 25, 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 06:51:31,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-11-07 06:51:31,003 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:51:31,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:51:31,004 INFO L82 PathProgramCache]: Analyzing trace with hash 430597841, now seen corresponding path program 25 times [2020-11-07 06:51:31,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:51:31,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92564061] [2020-11-07 06:51:31,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:51:31,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:51:34,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:51:34,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:51:34,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 101 proven. 1550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:51:34,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92564061] [2020-11-07 06:51:34,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:51:34,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-11-07 06:51:34,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25055741] [2020-11-07 06:51:34,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-11-07 06:51:34,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:51:34,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-11-07 06:51:34,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2732, Unknown=0, NotChecked=0, Total=2862 [2020-11-07 06:51:34,298 INFO L87 Difference]: Start difference. First operand 154 states and 156 transitions. Second operand 54 states. [2020-11-07 06:51:48,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:51:48,412 INFO L93 Difference]: Finished difference Result 173 states and 177 transitions. [2020-11-07 06:51:48,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-11-07 06:51:48,413 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 152 [2020-11-07 06:51:48,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:51:48,416 INFO L225 Difference]: With dead ends: 173 [2020-11-07 06:51:48,416 INFO L226 Difference]: Without dead ends: 161 [2020-11-07 06:51:48,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2851 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=683, Invalid=16087, Unknown=0, NotChecked=0, Total=16770 [2020-11-07 06:51:48,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-11-07 06:51:48,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2020-11-07 06:51:48,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-11-07 06:51:48,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 161 transitions. [2020-11-07 06:51:48,452 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 161 transitions. Word has length 152 [2020-11-07 06:51:48,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:51:48,452 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 161 transitions. [2020-11-07 06:51:48,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-11-07 06:51:48,452 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 161 transitions. [2020-11-07 06:51:48,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-11-07 06:51:48,453 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:51:48,453 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 26, 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 06:51:48,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-11-07 06:51:48,453 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:51:48,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:51:48,454 INFO L82 PathProgramCache]: Analyzing trace with hash 488402574, now seen corresponding path program 26 times [2020-11-07 06:51:48,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:51:48,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100536306] [2020-11-07 06:51:48,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:51:48,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:51:52,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:51:52,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:51:52,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 105 proven. 1677 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:51:52,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1100536306] [2020-11-07 06:51:52,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:51:52,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-11-07 06:51:52,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481925798] [2020-11-07 06:51:52,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-11-07 06:51:52,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:51:52,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-11-07 06:51:52,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2945, Unknown=0, NotChecked=0, Total=3080 [2020-11-07 06:51:52,146 INFO L87 Difference]: Start difference. First operand 159 states and 161 transitions. Second operand 56 states. [2020-11-07 06:52:06,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:52:06,776 INFO L93 Difference]: Finished difference Result 178 states and 182 transitions. [2020-11-07 06:52:06,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-11-07 06:52:06,777 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 157 [2020-11-07 06:52:06,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:52:06,779 INFO L225 Difference]: With dead ends: 178 [2020-11-07 06:52:06,779 INFO L226 Difference]: Without dead ends: 166 [2020-11-07 06:52:06,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3082 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=710, Invalid=17380, Unknown=0, NotChecked=0, Total=18090 [2020-11-07 06:52:06,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-11-07 06:52:06,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 164. [2020-11-07 06:52:06,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-11-07 06:52:06,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 166 transitions. [2020-11-07 06:52:06,824 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 166 transitions. Word has length 157 [2020-11-07 06:52:06,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:52:06,825 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 166 transitions. [2020-11-07 06:52:06,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-11-07 06:52:06,825 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 166 transitions. [2020-11-07 06:52:06,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-11-07 06:52:06,826 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:52:06,826 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 27, 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 06:52:06,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-11-07 06:52:06,827 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:52:06,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:52:06,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1520782095, now seen corresponding path program 27 times [2020-11-07 06:52:06,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:52:06,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671894859] [2020-11-07 06:52:06,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:52:06,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:52:10,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:52:10,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:52:10,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 109 proven. 1809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:52:10,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671894859] [2020-11-07 06:52:10,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:52:10,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-11-07 06:52:10,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160502429] [2020-11-07 06:52:10,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-11-07 06:52:10,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:52:10,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-11-07 06:52:10,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=3166, Unknown=0, NotChecked=0, Total=3306 [2020-11-07 06:52:10,668 INFO L87 Difference]: Start difference. First operand 164 states and 166 transitions. Second operand 58 states. [2020-11-07 06:52:27,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:52:27,110 INFO L93 Difference]: Finished difference Result 183 states and 187 transitions. [2020-11-07 06:52:27,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-11-07 06:52:27,111 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 162 [2020-11-07 06:52:27,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:52:27,113 INFO L225 Difference]: With dead ends: 183 [2020-11-07 06:52:27,113 INFO L226 Difference]: Without dead ends: 171 [2020-11-07 06:52:27,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3322 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=737, Invalid=18723, Unknown=0, NotChecked=0, Total=19460 [2020-11-07 06:52:27,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-11-07 06:52:27,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2020-11-07 06:52:27,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-11-07 06:52:27,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 171 transitions. [2020-11-07 06:52:27,159 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 171 transitions. Word has length 162 [2020-11-07 06:52:27,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:52:27,159 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 171 transitions. [2020-11-07 06:52:27,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-11-07 06:52:27,160 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 171 transitions. [2020-11-07 06:52:27,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-11-07 06:52:27,161 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:52:27,161 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 28, 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 06:52:27,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-11-07 06:52:27,161 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:52:27,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:52:27,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1341655954, now seen corresponding path program 28 times [2020-11-07 06:52:27,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:52:27,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129550325] [2020-11-07 06:52:27,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:52:27,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:52:31,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:52:31,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:52:31,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 113 proven. 1946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:52:31,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129550325] [2020-11-07 06:52:31,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:52:31,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-11-07 06:52:31,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413779559] [2020-11-07 06:52:31,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-11-07 06:52:31,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:52:31,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-11-07 06:52:31,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=3395, Unknown=0, NotChecked=0, Total=3540 [2020-11-07 06:52:31,304 INFO L87 Difference]: Start difference. First operand 169 states and 171 transitions. Second operand 60 states. [2020-11-07 06:52:48,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:52:48,099 INFO L93 Difference]: Finished difference Result 188 states and 192 transitions. [2020-11-07 06:52:48,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-11-07 06:52:48,100 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 167 [2020-11-07 06:52:48,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:52:48,102 INFO L225 Difference]: With dead ends: 188 [2020-11-07 06:52:48,103 INFO L226 Difference]: Without dead ends: 176 [2020-11-07 06:52:48,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3571 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=764, Invalid=20116, Unknown=0, NotChecked=0, Total=20880 [2020-11-07 06:52:48,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-11-07 06:52:48,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 174. [2020-11-07 06:52:48,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-11-07 06:52:48,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 176 transitions. [2020-11-07 06:52:48,140 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 176 transitions. Word has length 167 [2020-11-07 06:52:48,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:52:48,141 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 176 transitions. [2020-11-07 06:52:48,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-11-07 06:52:48,141 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 176 transitions. [2020-11-07 06:52:48,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-11-07 06:52:48,142 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:52:48,142 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 29, 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 06:52:48,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-11-07 06:52:48,143 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:52:48,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:52:48,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1609049327, now seen corresponding path program 29 times [2020-11-07 06:52:48,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:52:48,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [680850399] [2020-11-07 06:52:48,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:52:48,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:52:52,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:52:52,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:52:52,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 117 proven. 2088 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:52:52,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [680850399] [2020-11-07 06:52:52,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:52:52,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-11-07 06:52:52,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635823528] [2020-11-07 06:52:52,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-11-07 06:52:52,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:52:52,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-11-07 06:52:52,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=3632, Unknown=0, NotChecked=0, Total=3782 [2020-11-07 06:52:52,365 INFO L87 Difference]: Start difference. First operand 174 states and 176 transitions. Second operand 62 states. [2020-11-07 06:53:09,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:53:09,912 INFO L93 Difference]: Finished difference Result 193 states and 197 transitions. [2020-11-07 06:53:09,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-11-07 06:53:09,913 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 172 [2020-11-07 06:53:09,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:53:09,916 INFO L225 Difference]: With dead ends: 193 [2020-11-07 06:53:09,916 INFO L226 Difference]: Without dead ends: 181 [2020-11-07 06:53:09,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3829 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=791, Invalid=21559, Unknown=0, NotChecked=0, Total=22350 [2020-11-07 06:53:09,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-11-07 06:53:09,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 179. [2020-11-07 06:53:09,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-11-07 06:53:09,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 181 transitions. [2020-11-07 06:53:09,965 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 181 transitions. Word has length 172 [2020-11-07 06:53:09,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:53:09,966 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 181 transitions. [2020-11-07 06:53:09,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-11-07 06:53:09,966 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 181 transitions. [2020-11-07 06:53:09,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-11-07 06:53:09,967 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:53:09,967 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 30, 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 06:53:09,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-11-07 06:53:09,968 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:53:09,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:53:09,968 INFO L82 PathProgramCache]: Analyzing trace with hash -231890354, now seen corresponding path program 30 times [2020-11-07 06:53:09,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:53:09,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [189293055] [2020-11-07 06:53:09,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:53:10,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:53:14,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:53:14,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:53:14,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 121 proven. 2235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:53:14,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [189293055] [2020-11-07 06:53:14,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:53:14,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-11-07 06:53:14,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833679428] [2020-11-07 06:53:14,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-11-07 06:53:14,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:53:14,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-11-07 06:53:14,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=3877, Unknown=0, NotChecked=0, Total=4032 [2020-11-07 06:53:14,549 INFO L87 Difference]: Start difference. First operand 179 states and 181 transitions. Second operand 64 states. [2020-11-07 06:53:33,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:53:33,499 INFO L93 Difference]: Finished difference Result 198 states and 202 transitions. [2020-11-07 06:53:33,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-11-07 06:53:33,500 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 177 [2020-11-07 06:53:33,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:53:33,503 INFO L225 Difference]: With dead ends: 198 [2020-11-07 06:53:33,503 INFO L226 Difference]: Without dead ends: 186 [2020-11-07 06:53:33,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4096 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=818, Invalid=23052, Unknown=0, NotChecked=0, Total=23870 [2020-11-07 06:53:33,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-11-07 06:53:33,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2020-11-07 06:53:33,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-11-07 06:53:33,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 186 transitions. [2020-11-07 06:53:33,554 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 186 transitions. Word has length 177 [2020-11-07 06:53:33,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:53:33,554 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 186 transitions. [2020-11-07 06:53:33,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-11-07 06:53:33,555 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 186 transitions. [2020-11-07 06:53:33,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-11-07 06:53:33,556 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:53:33,556 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 31, 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 06:53:33,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-11-07 06:53:33,557 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:53:33,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:53:33,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1582048975, now seen corresponding path program 31 times [2020-11-07 06:53:33,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:53:33,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627313776] [2020-11-07 06:53:33,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:53:33,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:53:38,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:53:38,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:53:38,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 125 proven. 2387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:53:38,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627313776] [2020-11-07 06:53:38,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:53:38,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-11-07 06:53:38,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128384543] [2020-11-07 06:53:38,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-11-07 06:53:38,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:53:38,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-11-07 06:53:38,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=4130, Unknown=0, NotChecked=0, Total=4290 [2020-11-07 06:53:38,385 INFO L87 Difference]: Start difference. First operand 184 states and 186 transitions. Second operand 66 states. [2020-11-07 06:53:58,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:53:58,146 INFO L93 Difference]: Finished difference Result 203 states and 207 transitions. [2020-11-07 06:53:58,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2020-11-07 06:53:58,148 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 182 [2020-11-07 06:53:58,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:53:58,150 INFO L225 Difference]: With dead ends: 203 [2020-11-07 06:53:58,150 INFO L226 Difference]: Without dead ends: 191 [2020-11-07 06:53:58,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4372 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=845, Invalid=24595, Unknown=0, NotChecked=0, Total=25440 [2020-11-07 06:53:58,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-11-07 06:53:58,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 189. [2020-11-07 06:53:58,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-11-07 06:53:58,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 191 transitions. [2020-11-07 06:53:58,193 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 191 transitions. Word has length 182 [2020-11-07 06:53:58,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:53:58,194 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 191 transitions. [2020-11-07 06:53:58,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-11-07 06:53:58,194 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 191 transitions. [2020-11-07 06:53:58,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-11-07 06:53:58,195 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:53:58,195 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 32, 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 06:53:58,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-11-07 06:53:58,196 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:53:58,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:53:58,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1593538606, now seen corresponding path program 32 times [2020-11-07 06:53:58,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:53:58,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292851016] [2020-11-07 06:53:58,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:53:58,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:54:03,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:54:03,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:54:03,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 129 proven. 2544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:54:03,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292851016] [2020-11-07 06:54:03,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:54:03,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-11-07 06:54:03,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532240477] [2020-11-07 06:54:03,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-11-07 06:54:03,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:54:03,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-11-07 06:54:03,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=4391, Unknown=0, NotChecked=0, Total=4556 [2020-11-07 06:54:03,159 INFO L87 Difference]: Start difference. First operand 189 states and 191 transitions. Second operand 68 states. [2020-11-07 06:54:24,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:54:24,484 INFO L93 Difference]: Finished difference Result 208 states and 212 transitions. [2020-11-07 06:54:24,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2020-11-07 06:54:24,485 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 187 [2020-11-07 06:54:24,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:54:24,486 INFO L225 Difference]: With dead ends: 208 [2020-11-07 06:54:24,486 INFO L226 Difference]: Without dead ends: 196 [2020-11-07 06:54:24,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4657 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=872, Invalid=26188, Unknown=0, NotChecked=0, Total=27060 [2020-11-07 06:54:24,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-11-07 06:54:24,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 194. [2020-11-07 06:54:24,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-11-07 06:54:24,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 196 transitions. [2020-11-07 06:54:24,547 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 196 transitions. Word has length 187 [2020-11-07 06:54:24,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:54:24,548 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 196 transitions. [2020-11-07 06:54:24,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-11-07 06:54:24,548 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 196 transitions. [2020-11-07 06:54:24,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-11-07 06:54:24,549 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:54:24,549 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 33, 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 06:54:24,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-11-07 06:54:24,549 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:54:24,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:54:24,550 INFO L82 PathProgramCache]: Analyzing trace with hash 595636049, now seen corresponding path program 33 times [2020-11-07 06:54:24,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:54:24,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433302752] [2020-11-07 06:54:24,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:54:24,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:54:30,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:54:30,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:54:30,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 133 proven. 2706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:54:30,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [433302752] [2020-11-07 06:54:30,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:54:30,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-11-07 06:54:30,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076936407] [2020-11-07 06:54:30,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-11-07 06:54:30,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:54:30,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-11-07 06:54:30,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=4660, Unknown=0, NotChecked=0, Total=4830 [2020-11-07 06:54:30,222 INFO L87 Difference]: Start difference. First operand 194 states and 196 transitions. Second operand 70 states. [2020-11-07 06:54:53,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:54:53,322 INFO L93 Difference]: Finished difference Result 213 states and 217 transitions. [2020-11-07 06:54:53,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-11-07 06:54:53,324 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 192 [2020-11-07 06:54:53,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:54:53,325 INFO L225 Difference]: With dead ends: 213 [2020-11-07 06:54:53,325 INFO L226 Difference]: Without dead ends: 201 [2020-11-07 06:54:53,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4951 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=899, Invalid=27831, Unknown=0, NotChecked=0, Total=28730 [2020-11-07 06:54:53,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-11-07 06:54:53,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 199. [2020-11-07 06:54:53,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-11-07 06:54:53,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 201 transitions. [2020-11-07 06:54:53,385 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 201 transitions. Word has length 192 [2020-11-07 06:54:53,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:54:53,385 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 201 transitions. [2020-11-07 06:54:53,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-11-07 06:54:53,385 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 201 transitions. [2020-11-07 06:54:53,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-11-07 06:54:53,386 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:54:53,387 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 34, 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 06:54:53,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-11-07 06:54:53,387 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:54:53,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:54:53,387 INFO L82 PathProgramCache]: Analyzing trace with hash -2141227506, now seen corresponding path program 34 times [2020-11-07 06:54:53,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:54:53,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149871352] [2020-11-07 06:54:53,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:54:53,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:54:59,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:54:59,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:54:59,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 137 proven. 2873 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:54:59,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1149871352] [2020-11-07 06:54:59,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:54:59,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2020-11-07 06:54:59,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125163674] [2020-11-07 06:54:59,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-11-07 06:54:59,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:54:59,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-11-07 06:54:59,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=4937, Unknown=0, NotChecked=0, Total=5112 [2020-11-07 06:54:59,294 INFO L87 Difference]: Start difference. First operand 199 states and 201 transitions. Second operand 72 states. [2020-11-07 06:55:23,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:55:23,730 INFO L93 Difference]: Finished difference Result 218 states and 222 transitions. [2020-11-07 06:55:23,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2020-11-07 06:55:23,731 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 197 [2020-11-07 06:55:23,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:55:23,733 INFO L225 Difference]: With dead ends: 218 [2020-11-07 06:55:23,733 INFO L226 Difference]: Without dead ends: 206 [2020-11-07 06:55:23,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5254 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=926, Invalid=29524, Unknown=0, NotChecked=0, Total=30450 [2020-11-07 06:55:23,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-11-07 06:55:23,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 204. [2020-11-07 06:55:23,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-11-07 06:55:23,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 206 transitions. [2020-11-07 06:55:23,783 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 206 transitions. Word has length 197 [2020-11-07 06:55:23,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:55:23,784 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 206 transitions. [2020-11-07 06:55:23,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-11-07 06:55:23,784 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 206 transitions. [2020-11-07 06:55:23,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-11-07 06:55:23,785 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:55:23,785 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 35, 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 06:55:23,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-11-07 06:55:23,785 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:55:23,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:55:23,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1605345935, now seen corresponding path program 35 times [2020-11-07 06:55:23,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:55:23,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519119711] [2020-11-07 06:55:23,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:55:23,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:55:30,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:55:30,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:55:30,169 INFO L134 CoverageAnalysis]: Checked inductivity of 3186 backedges. 141 proven. 3045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:55:30,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519119711] [2020-11-07 06:55:30,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:55:30,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2020-11-07 06:55:30,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643223167] [2020-11-07 06:55:30,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-11-07 06:55:30,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:55:30,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-11-07 06:55:30,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=5222, Unknown=0, NotChecked=0, Total=5402 [2020-11-07 06:55:30,171 INFO L87 Difference]: Start difference. First operand 204 states and 206 transitions. Second operand 74 states. [2020-11-07 06:55:55,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:55:55,946 INFO L93 Difference]: Finished difference Result 223 states and 227 transitions. [2020-11-07 06:55:55,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2020-11-07 06:55:55,947 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 202 [2020-11-07 06:55:55,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:55:55,949 INFO L225 Difference]: With dead ends: 223 [2020-11-07 06:55:55,949 INFO L226 Difference]: Without dead ends: 211 [2020-11-07 06:55:55,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5566 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=953, Invalid=31267, Unknown=0, NotChecked=0, Total=32220 [2020-11-07 06:55:55,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-11-07 06:55:56,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 209. [2020-11-07 06:55:56,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-11-07 06:55:56,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 211 transitions. [2020-11-07 06:55:56,009 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 211 transitions. Word has length 202 [2020-11-07 06:55:56,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:55:56,009 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 211 transitions. [2020-11-07 06:55:56,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-11-07 06:55:56,009 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 211 transitions. [2020-11-07 06:55:56,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-11-07 06:55:56,011 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:55:56,011 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 36, 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 06:55:56,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-11-07 06:55:56,011 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:55:56,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:55:56,011 INFO L82 PathProgramCache]: Analyzing trace with hash -825779218, now seen corresponding path program 36 times [2020-11-07 06:55:56,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:55:56,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1335468488] [2020-11-07 06:55:56,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:55:56,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:56:02,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:56:02,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:56:02,999 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 145 proven. 3222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:56:02,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1335468488] [2020-11-07 06:56:02,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:56:02,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2020-11-07 06:56:02,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923405921] [2020-11-07 06:56:03,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-11-07 06:56:03,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:56:03,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-11-07 06:56:03,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=5515, Unknown=0, NotChecked=0, Total=5700 [2020-11-07 06:56:03,001 INFO L87 Difference]: Start difference. First operand 209 states and 211 transitions. Second operand 76 states. [2020-11-07 06:56:29,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:56:29,891 INFO L93 Difference]: Finished difference Result 228 states and 232 transitions. [2020-11-07 06:56:29,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2020-11-07 06:56:29,892 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 207 [2020-11-07 06:56:29,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:56:29,894 INFO L225 Difference]: With dead ends: 228 [2020-11-07 06:56:29,895 INFO L226 Difference]: Without dead ends: 216 [2020-11-07 06:56:29,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5887 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=980, Invalid=33060, Unknown=0, NotChecked=0, Total=34040 [2020-11-07 06:56:29,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-11-07 06:56:29,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 214. [2020-11-07 06:56:29,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-11-07 06:56:29,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 216 transitions. [2020-11-07 06:56:29,945 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 216 transitions. Word has length 207 [2020-11-07 06:56:29,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:56:29,946 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 216 transitions. [2020-11-07 06:56:29,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-11-07 06:56:29,946 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 216 transitions. [2020-11-07 06:56:29,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-11-07 06:56:29,947 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:56:29,947 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 37, 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 06:56:29,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-11-07 06:56:29,947 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:56:29,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:56:29,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1267407983, now seen corresponding path program 37 times [2020-11-07 06:56:29,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:56:29,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [20680409] [2020-11-07 06:56:29,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:56:29,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:56:37,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:56:37,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:56:37,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3553 backedges. 149 proven. 3404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:56:37,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [20680409] [2020-11-07 06:56:37,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:56:37,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2020-11-07 06:56:37,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028114302] [2020-11-07 06:56:37,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-11-07 06:56:37,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:56:37,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-11-07 06:56:37,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=5816, Unknown=0, NotChecked=0, Total=6006 [2020-11-07 06:56:37,272 INFO L87 Difference]: Start difference. First operand 214 states and 216 transitions. Second operand 78 states. [2020-11-07 06:57:05,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:57:05,701 INFO L93 Difference]: Finished difference Result 233 states and 237 transitions. [2020-11-07 06:57:05,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-11-07 06:57:05,702 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 212 [2020-11-07 06:57:05,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:57:05,704 INFO L225 Difference]: With dead ends: 233 [2020-11-07 06:57:05,704 INFO L226 Difference]: Without dead ends: 221 [2020-11-07 06:57:05,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6217 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=1007, Invalid=34903, Unknown=0, NotChecked=0, Total=35910 [2020-11-07 06:57:05,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-11-07 06:57:05,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 219. [2020-11-07 06:57:05,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-11-07 06:57:05,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 221 transitions. [2020-11-07 06:57:05,782 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 221 transitions. Word has length 212 [2020-11-07 06:57:05,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:57:05,783 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 221 transitions. [2020-11-07 06:57:05,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-11-07 06:57:05,783 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 221 transitions. [2020-11-07 06:57:05,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-11-07 06:57:05,784 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:57:05,784 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 38, 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 06:57:05,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-11-07 06:57:05,785 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:57:05,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:57:05,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1860048434, now seen corresponding path program 38 times [2020-11-07 06:57:05,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:57:05,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [763650583] [2020-11-07 06:57:05,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:57:05,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:57:13,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:57:13,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:57:13,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3744 backedges. 153 proven. 3591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:57:13,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [763650583] [2020-11-07 06:57:13,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:57:13,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2020-11-07 06:57:13,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996722889] [2020-11-07 06:57:13,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-11-07 06:57:13,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:57:13,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-11-07 06:57:13,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=6125, Unknown=0, NotChecked=0, Total=6320 [2020-11-07 06:57:13,796 INFO L87 Difference]: Start difference. First operand 219 states and 221 transitions. Second operand 80 states. [2020-11-07 06:57:44,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:57:44,370 INFO L93 Difference]: Finished difference Result 238 states and 242 transitions. [2020-11-07 06:57:44,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2020-11-07 06:57:44,372 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 217 [2020-11-07 06:57:44,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:57:44,373 INFO L225 Difference]: With dead ends: 238 [2020-11-07 06:57:44,374 INFO L226 Difference]: Without dead ends: 226 [2020-11-07 06:57:44,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6556 ImplicationChecksByTransitivity, 24.5s TimeCoverageRelationStatistics Valid=1034, Invalid=36796, Unknown=0, NotChecked=0, Total=37830 [2020-11-07 06:57:44,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-11-07 06:57:44,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 224. [2020-11-07 06:57:44,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-11-07 06:57:44,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 226 transitions. [2020-11-07 06:57:44,423 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 226 transitions. Word has length 217 [2020-11-07 06:57:44,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:57:44,424 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 226 transitions. [2020-11-07 06:57:44,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-11-07 06:57:44,424 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 226 transitions. [2020-11-07 06:57:44,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-11-07 06:57:44,424 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:57:44,425 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 39, 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 06:57:44,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-11-07 06:57:44,425 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:57:44,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:57:44,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1036009905, now seen corresponding path program 39 times [2020-11-07 06:57:44,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:57:44,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551478404] [2020-11-07 06:57:44,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:57:44,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:57:52,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:57:52,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:57:53,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3940 backedges. 157 proven. 3783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:57:53,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551478404] [2020-11-07 06:57:53,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:57:53,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2020-11-07 06:57:53,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333147498] [2020-11-07 06:57:53,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-11-07 06:57:53,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:57:53,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-11-07 06:57:53,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=6442, Unknown=0, NotChecked=0, Total=6642 [2020-11-07 06:57:53,058 INFO L87 Difference]: Start difference. First operand 224 states and 226 transitions. Second operand 82 states. [2020-11-07 06:58:26,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:58:26,017 INFO L93 Difference]: Finished difference Result 243 states and 247 transitions. [2020-11-07 06:58:26,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2020-11-07 06:58:26,018 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 222 [2020-11-07 06:58:26,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:58:26,019 INFO L225 Difference]: With dead ends: 243 [2020-11-07 06:58:26,019 INFO L226 Difference]: Without dead ends: 231 [2020-11-07 06:58:26,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6904 ImplicationChecksByTransitivity, 26.4s TimeCoverageRelationStatistics Valid=1061, Invalid=38739, Unknown=0, NotChecked=0, Total=39800 [2020-11-07 06:58:26,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-11-07 06:58:26,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 229. [2020-11-07 06:58:26,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-11-07 06:58:26,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 231 transitions. [2020-11-07 06:58:26,071 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 231 transitions. Word has length 222 [2020-11-07 06:58:26,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:58:26,071 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 231 transitions. [2020-11-07 06:58:26,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-11-07 06:58:26,071 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 231 transitions. [2020-11-07 06:58:26,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-11-07 06:58:26,072 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:58:26,072 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 40, 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 06:58:26,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-11-07 06:58:26,072 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:58:26,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:58:26,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1126408274, now seen corresponding path program 40 times [2020-11-07 06:58:26,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:58:26,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821603698] [2020-11-07 06:58:26,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:58:26,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:58:35,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:58:35,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:58:35,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 161 proven. 3980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:58:35,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821603698] [2020-11-07 06:58:35,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:58:35,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2020-11-07 06:58:35,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066521767] [2020-11-07 06:58:35,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-11-07 06:58:35,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:58:35,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-11-07 06:58:35,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=6767, Unknown=0, NotChecked=0, Total=6972 [2020-11-07 06:58:35,386 INFO L87 Difference]: Start difference. First operand 229 states and 231 transitions. Second operand 84 states. [2020-11-07 06:59:10,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:59:10,930 INFO L93 Difference]: Finished difference Result 248 states and 252 transitions. [2020-11-07 06:59:10,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2020-11-07 06:59:10,931 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 227 [2020-11-07 06:59:10,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:59:10,933 INFO L225 Difference]: With dead ends: 248 [2020-11-07 06:59:10,933 INFO L226 Difference]: Without dead ends: 236 [2020-11-07 06:59:10,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7261 ImplicationChecksByTransitivity, 28.4s TimeCoverageRelationStatistics Valid=1088, Invalid=40732, Unknown=0, NotChecked=0, Total=41820 [2020-11-07 06:59:10,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-11-07 06:59:11,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 234. [2020-11-07 06:59:11,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-11-07 06:59:11,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 236 transitions. [2020-11-07 06:59:11,005 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 236 transitions. Word has length 227 [2020-11-07 06:59:11,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:59:11,006 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 236 transitions. [2020-11-07 06:59:11,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-11-07 06:59:11,006 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 236 transitions. [2020-11-07 06:59:11,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-11-07 06:59:11,007 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:59:11,007 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 41, 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 06:59:11,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-11-07 06:59:11,008 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:59:11,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:59:11,008 INFO L82 PathProgramCache]: Analyzing trace with hash 2072278993, now seen corresponding path program 41 times [2020-11-07 06:59:11,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:59:11,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473806683] [2020-11-07 06:59:11,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:59:11,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:59:21,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:59:21,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:59:21,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 165 proven. 4182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:59:21,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473806683] [2020-11-07 06:59:21,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:59:21,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2020-11-07 06:59:21,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503251075] [2020-11-07 06:59:21,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-11-07 06:59:21,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:59:21,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-11-07 06:59:21,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=7100, Unknown=0, NotChecked=0, Total=7310 [2020-11-07 06:59:21,157 INFO L87 Difference]: Start difference. First operand 234 states and 236 transitions. Second operand 86 states. [2020-11-07 06:59:59,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:59:59,721 INFO L93 Difference]: Finished difference Result 253 states and 257 transitions. [2020-11-07 06:59:59,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2020-11-07 06:59:59,722 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 232 [2020-11-07 06:59:59,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:59:59,725 INFO L225 Difference]: With dead ends: 253 [2020-11-07 06:59:59,725 INFO L226 Difference]: Without dead ends: 241 [2020-11-07 06:59:59,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7627 ImplicationChecksByTransitivity, 30.6s TimeCoverageRelationStatistics Valid=1115, Invalid=42775, Unknown=0, NotChecked=0, Total=43890 [2020-11-07 06:59:59,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-11-07 06:59:59,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 239. [2020-11-07 06:59:59,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-11-07 06:59:59,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 241 transitions. [2020-11-07 06:59:59,796 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 241 transitions. Word has length 232 [2020-11-07 06:59:59,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:59:59,796 INFO L481 AbstractCegarLoop]: Abstraction has 239 states and 241 transitions. [2020-11-07 06:59:59,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-11-07 06:59:59,796 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 241 transitions. [2020-11-07 06:59:59,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-11-07 06:59:59,798 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:59:59,798 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 42, 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 06:59:59,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-11-07 06:59:59,798 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:59:59,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:59:59,799 INFO L82 PathProgramCache]: Analyzing trace with hash -706413170, now seen corresponding path program 42 times [2020-11-07 06:59:59,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:59:59,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392005176] [2020-11-07 06:59:59,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:59:59,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 07:00:10,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 07:00:10,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 07:00:10,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4558 backedges. 169 proven. 4389 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 07:00:10,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392005176] [2020-11-07 07:00:10,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 07:00:10,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2020-11-07 07:00:10,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453429712] [2020-11-07 07:00:10,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-11-07 07:00:10,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 07:00:10,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-11-07 07:00:10,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=7441, Unknown=0, NotChecked=0, Total=7656 [2020-11-07 07:00:10,422 INFO L87 Difference]: Start difference. First operand 239 states and 241 transitions. Second operand 88 states. [2020-11-07 07:00:52,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 07:00:52,048 INFO L93 Difference]: Finished difference Result 258 states and 262 transitions. [2020-11-07 07:00:52,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2020-11-07 07:00:52,050 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 237 [2020-11-07 07:00:52,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 07:00:52,051 INFO L225 Difference]: With dead ends: 258 [2020-11-07 07:00:52,052 INFO L226 Difference]: Without dead ends: 246 [2020-11-07 07:00:52,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8002 ImplicationChecksByTransitivity, 32.5s TimeCoverageRelationStatistics Valid=1142, Invalid=44868, Unknown=0, NotChecked=0, Total=46010 [2020-11-07 07:00:52,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-11-07 07:00:52,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 244. [2020-11-07 07:00:52,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-11-07 07:00:52,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 246 transitions. [2020-11-07 07:00:52,103 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 246 transitions. Word has length 237 [2020-11-07 07:00:52,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 07:00:52,103 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 246 transitions. [2020-11-07 07:00:52,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-11-07 07:00:52,103 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 246 transitions. [2020-11-07 07:00:52,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-11-07 07:00:52,104 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 07:00:52,104 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 43, 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 07:00:52,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-11-07 07:00:52,105 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 07:00:52,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 07:00:52,105 INFO L82 PathProgramCache]: Analyzing trace with hash 781420017, now seen corresponding path program 43 times [2020-11-07 07:00:52,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 07:00:52,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578672309] [2020-11-07 07:00:52,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 07:00:52,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 07:01:03,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 07:01:03,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 07:01:03,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4774 backedges. 173 proven. 4601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 07:01:03,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578672309] [2020-11-07 07:01:03,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 07:01:03,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2020-11-07 07:01:03,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740025418] [2020-11-07 07:01:03,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-11-07 07:01:03,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 07:01:03,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-11-07 07:01:03,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=7790, Unknown=0, NotChecked=0, Total=8010 [2020-11-07 07:01:03,804 INFO L87 Difference]: Start difference. First operand 244 states and 246 transitions. Second operand 90 states. [2020-11-07 07:01:49,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 07:01:49,966 INFO L93 Difference]: Finished difference Result 263 states and 267 transitions. [2020-11-07 07:01:49,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2020-11-07 07:01:49,968 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 242 [2020-11-07 07:01:49,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 07:01:49,971 INFO L225 Difference]: With dead ends: 263 [2020-11-07 07:01:49,971 INFO L226 Difference]: Without dead ends: 251 [2020-11-07 07:01:49,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8386 ImplicationChecksByTransitivity, 35.3s TimeCoverageRelationStatistics Valid=1169, Invalid=47011, Unknown=0, NotChecked=0, Total=48180 [2020-11-07 07:01:49,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-11-07 07:01:50,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 249. [2020-11-07 07:01:50,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-11-07 07:01:50,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 251 transitions. [2020-11-07 07:01:50,052 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 251 transitions. Word has length 242 [2020-11-07 07:01:50,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 07:01:50,052 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 251 transitions. [2020-11-07 07:01:50,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 90 states. [2020-11-07 07:01:50,053 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 251 transitions. [2020-11-07 07:01:50,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-11-07 07:01:50,054 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 07:01:50,054 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 44, 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 07:01:50,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-11-07 07:01:50,054 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 07:01:50,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 07:01:50,055 INFO L82 PathProgramCache]: Analyzing trace with hash -827735186, now seen corresponding path program 44 times [2020-11-07 07:01:50,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 07:01:50,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857848253] [2020-11-07 07:01:50,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 07:01:50,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat