/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_3.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 11:32:45,157 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 11:32:45,158 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 11:32:45,187 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 11:32:45,236 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 11:32:45,236 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 11:32:45,237 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 11:32:45,239 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-06 11:32:45,249 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 11:32:45,250 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 11:32:45,252 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 11:32:45,252 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 11:32:45,252 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 11:32:45,252 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 11:32:45,256 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 11:32:45,256 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 11:32:45,257 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 11:32:45,257 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 11:32:45,257 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 11:32:45,257 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 11:32:45,257 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 11:32:45,258 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 11:32:45,258 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 11:32:45,258 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 11:32:45,258 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 11:32:45,258 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 11:32:45,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 11:32:45,258 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 11:32:45,258 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-06 11:32:45,258 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 11:32:45,259 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-06 11:32:45,259 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 11:32:45,493 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 11:32:45,515 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 11:32:45,516 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 11:32:45,517 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 11:32:45,517 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 11:32:45,518 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_3.i [2021-05-06 11:32:45,561 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df1f0771c/0cd093a8824d4a5ba0a321e79688555f/FLAGc54025088 [2021-05-06 11:32:45,941 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 11:32:45,941 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_3.i [2021-05-06 11:32:45,945 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df1f0771c/0cd093a8824d4a5ba0a321e79688555f/FLAGc54025088 [2021-05-06 11:32:46,349 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df1f0771c/0cd093a8824d4a5ba0a321e79688555f [2021-05-06 11:32:46,351 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 11:32:46,352 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 11:32:46,355 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 11:32:46,355 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 11:32:46,358 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 11:32:46,358 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 11:32:46" (1/1) ... [2021-05-06 11:32:46,359 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6de9a4b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:32:46, skipping insertion in model container [2021-05-06 11:32:46,359 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 11:32:46" (1/1) ... [2021-05-06 11:32:46,365 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 11:32:46,375 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 11:32:46,457 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_3.i[920,933] [2021-05-06 11:32:46,465 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 11:32:46,470 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 11:32:46,484 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_3.i[920,933] [2021-05-06 11:32:46,488 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 11:32:46,506 INFO L208 MainTranslator]: Completed translation [2021-05-06 11:32:46,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:32:46 WrapperNode [2021-05-06 11:32:46,506 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 11:32:46,507 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 11:32:46,507 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 11:32:46,508 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 11:32:46,515 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:32:46" (1/1) ... [2021-05-06 11:32:46,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:32:46" (1/1) ... [2021-05-06 11:32:46,519 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:32:46" (1/1) ... [2021-05-06 11:32:46,519 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:32:46" (1/1) ... [2021-05-06 11:32:46,527 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:32:46" (1/1) ... [2021-05-06 11:32:46,530 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:32:46" (1/1) ... [2021-05-06 11:32:46,530 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:32:46" (1/1) ... [2021-05-06 11:32:46,532 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 11:32:46,533 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 11:32:46,533 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 11:32:46,533 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 11:32:46,533 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:32:46" (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 [2021-05-06 11:32:46,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 11:32:46,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 11:32:46,580 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 11:32:46,580 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 11:32:46,580 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 11:32:46,580 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 11:32:46,580 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 11:32:46,581 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 11:32:46,581 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-06 11:32:46,581 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-06 11:32:46,581 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 11:32:46,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 11:32:46,581 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 11:32:46,585 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 11:32:46,585 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 11:32:46,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 11:32:46,585 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 11:32:46,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 11:32:46,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 11:32:46,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 11:32:46,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 11:32:46,768 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 11:32:46,768 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 11:32:46,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 11:32:46 BoogieIcfgContainer [2021-05-06 11:32:46,769 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 11:32:46,770 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 11:32:46,770 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 11:32:46,772 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 11:32:46,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 11:32:46" (1/3) ... [2021-05-06 11:32:46,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@702afe07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 11:32:46, skipping insertion in model container [2021-05-06 11:32:46,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:32:46" (2/3) ... [2021-05-06 11:32:46,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@702afe07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 11:32:46, skipping insertion in model container [2021-05-06 11:32:46,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 11:32:46" (3/3) ... [2021-05-06 11:32:46,774 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_3.i [2021-05-06 11:32:46,777 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-06 11:32:46,780 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 11:32:46,790 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 11:32:46,816 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 11:32:46,817 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 11:32:46,817 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-06 11:32:46,817 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 11:32:46,817 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 11:32:46,817 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 11:32:46,817 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 11:32:46,817 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 11:32:46,825 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:32:46,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-06 11:32:46,830 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:32:46,831 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:32:46,831 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:32:46,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:32:46,834 INFO L82 PathProgramCache]: Analyzing trace with hash -851892248, now seen corresponding path program 1 times [2021-05-06 11:32:46,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:32:46,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1315775766] [2021-05-06 11:32:46,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:32:46,903 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:32:46,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:47,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:32:47,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:47,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:32:47,064 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:32:47,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1315775766] [2021-05-06 11:32:47,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1315775766] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:32:47,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:32:47,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 11:32:47,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606524421] [2021-05-06 11:32:47,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 11:32:47,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:32:47,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 11:32:47,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 11:32:47,081 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:47,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:32:47,247 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2021-05-06 11:32:47,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 11:32:47,248 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-06 11:32:47,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:32:47,254 INFO L225 Difference]: With dead ends: 47 [2021-05-06 11:32:47,255 INFO L226 Difference]: Without dead ends: 25 [2021-05-06 11:32:47,257 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 110.5ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-05-06 11:32:47,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-06 11:32:47,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-05-06 11:32:47,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:32:47,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-05-06 11:32:47,287 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2021-05-06 11:32:47,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:32:47,287 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-05-06 11:32:47,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:47,288 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-05-06 11:32:47,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-06 11:32:47,288 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:32:47,289 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:32:47,289 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 11:32:47,289 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:32:47,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:32:47,290 INFO L82 PathProgramCache]: Analyzing trace with hash -850045206, now seen corresponding path program 1 times [2021-05-06 11:32:47,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:32:47,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1428097790] [2021-05-06 11:32:47,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:32:47,297 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:32:47,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:47,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:32:47,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:47,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:32:47,388 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:32:47,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1428097790] [2021-05-06 11:32:47,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1428097790] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:32:47,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:32:47,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 11:32:47,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860760465] [2021-05-06 11:32:47,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 11:32:47,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:32:47,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 11:32:47,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 11:32:47,390 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:47,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:32:47,428 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2021-05-06 11:32:47,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 11:32:47,429 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-06 11:32:47,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:32:47,431 INFO L225 Difference]: With dead ends: 48 [2021-05-06 11:32:47,431 INFO L226 Difference]: Without dead ends: 31 [2021-05-06 11:32:47,432 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 11:32:47,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-06 11:32:47,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2021-05-06 11:32:47,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:32:47,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-05-06 11:32:47,438 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 14 [2021-05-06 11:32:47,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:32:47,439 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-05-06 11:32:47,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:47,439 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-05-06 11:32:47,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-06 11:32:47,439 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:32:47,439 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:32:47,439 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 11:32:47,439 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:32:47,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:32:47,440 INFO L82 PathProgramCache]: Analyzing trace with hash -446317518, now seen corresponding path program 1 times [2021-05-06 11:32:47,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:32:47,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780406292] [2021-05-06 11:32:47,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:32:47,453 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:32:47,454 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:32:47,455 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:32:47,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:47,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:32:47,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:47,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:32:47,557 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:32:47,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780406292] [2021-05-06 11:32:47,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1780406292] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:32:47,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:32:47,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 11:32:47,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418802798] [2021-05-06 11:32:47,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 11:32:47,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:32:47,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 11:32:47,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 11:32:47,559 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:47,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:32:47,626 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2021-05-06 11:32:47,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 11:32:47,627 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-06 11:32:47,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:32:47,628 INFO L225 Difference]: With dead ends: 55 [2021-05-06 11:32:47,628 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 11:32:47,629 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 33.0ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 11:32:47,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 11:32:47,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2021-05-06 11:32:47,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:32:47,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-05-06 11:32:47,641 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 15 [2021-05-06 11:32:47,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:32:47,641 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-05-06 11:32:47,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:47,641 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-05-06 11:32:47,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-06 11:32:47,641 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:32:47,642 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:32:47,642 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 11:32:47,642 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:32:47,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:32:47,642 INFO L82 PathProgramCache]: Analyzing trace with hash -815661078, now seen corresponding path program 2 times [2021-05-06 11:32:47,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:32:47,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35707033] [2021-05-06 11:32:47,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:32:47,647 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:32:47,647 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:32:47,648 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:32:47,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:47,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:32:47,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:47,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:32:47,744 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:32:47,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35707033] [2021-05-06 11:32:47,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [35707033] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:32:47,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:32:47,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 11:32:47,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092159994] [2021-05-06 11:32:47,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 11:32:47,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:32:47,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 11:32:47,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 11:32:47,745 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:47,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:32:47,844 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2021-05-06 11:32:47,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 11:32:47,845 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-05-06 11:32:47,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:32:47,846 INFO L225 Difference]: With dead ends: 62 [2021-05-06 11:32:47,846 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 11:32:47,846 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 30.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 11:32:47,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 11:32:47,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 27. [2021-05-06 11:32:47,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:32:47,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-05-06 11:32:47,851 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 16 [2021-05-06 11:32:47,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:32:47,851 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-05-06 11:32:47,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:47,851 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-05-06 11:32:47,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 11:32:47,852 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:32:47,852 INFO L523 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:32:47,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-06 11:32:47,852 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:32:47,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:32:47,852 INFO L82 PathProgramCache]: Analyzing trace with hash 619590450, now seen corresponding path program 3 times [2021-05-06 11:32:47,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:32:47,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016876262] [2021-05-06 11:32:47,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:32:47,856 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:32:47,856 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:32:47,857 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:32:47,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:47,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:32:47,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:47,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:32:47,940 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:32:47,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016876262] [2021-05-06 11:32:47,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2016876262] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:32:47,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:32:47,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-06 11:32:47,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191739439] [2021-05-06 11:32:47,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 11:32:47,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:32:47,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 11:32:47,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-06 11:32:47,942 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:48,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:32:48,048 INFO L93 Difference]: Finished difference Result 69 states and 85 transitions. [2021-05-06 11:32:48,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 11:32:48,049 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-06 11:32:48,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:32:48,051 INFO L225 Difference]: With dead ends: 69 [2021-05-06 11:32:48,051 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 11:32:48,051 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 39.6ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-06 11:32:48,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 11:32:48,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 28. [2021-05-06 11:32:48,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:32:48,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-05-06 11:32:48,059 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 17 [2021-05-06 11:32:48,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:32:48,060 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-05-06 11:32:48,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:48,060 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-05-06 11:32:48,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 11:32:48,060 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:32:48,061 INFO L523 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:32:48,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-06 11:32:48,062 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:32:48,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:32:48,063 INFO L82 PathProgramCache]: Analyzing trace with hash -2132252438, now seen corresponding path program 4 times [2021-05-06 11:32:48,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:32:48,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964099373] [2021-05-06 11:32:48,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:32:48,068 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:32:48,068 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:32:48,069 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:32:48,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:48,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:32:48,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:48,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:32:48,159 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:32:48,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964099373] [2021-05-06 11:32:48,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [964099373] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:32:48,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:32:48,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 11:32:48,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003927735] [2021-05-06 11:32:48,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 11:32:48,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:32:48,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 11:32:48,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 11:32:48,161 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:48,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:32:48,280 INFO L93 Difference]: Finished difference Result 76 states and 95 transitions. [2021-05-06 11:32:48,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 11:32:48,281 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-05-06 11:32:48,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:32:48,283 INFO L225 Difference]: With dead ends: 76 [2021-05-06 11:32:48,283 INFO L226 Difference]: Without dead ends: 59 [2021-05-06 11:32:48,283 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 11:32:48,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-06 11:32:48,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 29. [2021-05-06 11:32:48,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:32:48,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-05-06 11:32:48,292 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 18 [2021-05-06 11:32:48,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:32:48,292 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-05-06 11:32:48,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:48,293 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-05-06 11:32:48,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-06 11:32:48,293 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:32:48,293 INFO L523 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:32:48,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-06 11:32:48,293 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:32:48,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:32:48,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1540036046, now seen corresponding path program 5 times [2021-05-06 11:32:48,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:32:48,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876173141] [2021-05-06 11:32:48,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:32:48,296 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:32:48,296 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:32:48,302 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:32:48,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:48,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:32:48,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:48,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:32:48,432 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:32:48,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876173141] [2021-05-06 11:32:48,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [876173141] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:32:48,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:32:48,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 11:32:48,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789823346] [2021-05-06 11:32:48,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 11:32:48,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:32:48,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 11:32:48,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-06 11:32:48,435 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:48,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:32:48,596 INFO L93 Difference]: Finished difference Result 83 states and 105 transitions. [2021-05-06 11:32:48,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 11:32:48,597 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-05-06 11:32:48,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:32:48,598 INFO L225 Difference]: With dead ends: 83 [2021-05-06 11:32:48,598 INFO L226 Difference]: Without dead ends: 66 [2021-05-06 11:32:48,598 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 62.9ms TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-06 11:32:48,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-05-06 11:32:48,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 30. [2021-05-06 11:32:48,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:32:48,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-05-06 11:32:48,602 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 19 [2021-05-06 11:32:48,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:32:48,603 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-05-06 11:32:48,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:48,603 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-05-06 11:32:48,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 11:32:48,603 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:32:48,603 INFO L523 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:32:48,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-06 11:32:48,603 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:32:48,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:32:48,604 INFO L82 PathProgramCache]: Analyzing trace with hash -361197078, now seen corresponding path program 6 times [2021-05-06 11:32:48,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:32:48,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652973152] [2021-05-06 11:32:48,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:32:48,606 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:32:48,606 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:32:48,607 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:32:48,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:48,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:32:48,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:48,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:32:48,708 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:32:48,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652973152] [2021-05-06 11:32:48,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [652973152] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:32:48,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:32:48,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-06 11:32:48,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035932186] [2021-05-06 11:32:48,709 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 11:32:48,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:32:48,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 11:32:48,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-06 11:32:48,709 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:48,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:32:48,892 INFO L93 Difference]: Finished difference Result 90 states and 115 transitions. [2021-05-06 11:32:48,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 11:32:48,892 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-05-06 11:32:48,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:32:48,893 INFO L225 Difference]: With dead ends: 90 [2021-05-06 11:32:48,893 INFO L226 Difference]: Without dead ends: 73 [2021-05-06 11:32:48,894 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 68.1ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-06 11:32:48,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-06 11:32:48,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 31. [2021-05-06 11:32:48,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:32:48,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-05-06 11:32:48,905 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 20 [2021-05-06 11:32:48,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:32:48,908 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-05-06 11:32:48,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:48,908 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-05-06 11:32:48,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-06 11:32:48,908 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:32:48,908 INFO L523 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:32:48,909 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-06 11:32:48,909 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:32:48,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:32:48,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1823072562, now seen corresponding path program 7 times [2021-05-06 11:32:48,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:32:48,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1325849585] [2021-05-06 11:32:48,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:32:48,913 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:32:48,913 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:32:48,915 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:32:48,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:49,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:32:49,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:49,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:32:49,063 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:32:49,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1325849585] [2021-05-06 11:32:49,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1325849585] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:32:49,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:32:49,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-06 11:32:49,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520882982] [2021-05-06 11:32:49,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 11:32:49,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:32:49,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 11:32:49,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 11:32:49,064 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:49,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:32:49,277 INFO L93 Difference]: Finished difference Result 97 states and 125 transitions. [2021-05-06 11:32:49,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 11:32:49,278 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-05-06 11:32:49,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:32:49,278 INFO L225 Difference]: With dead ends: 97 [2021-05-06 11:32:49,278 INFO L226 Difference]: Without dead ends: 80 [2021-05-06 11:32:49,279 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 71.9ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 11:32:49,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-06 11:32:49,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 32. [2021-05-06 11:32:49,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:32:49,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-05-06 11:32:49,283 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 21 [2021-05-06 11:32:49,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:32:49,283 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-05-06 11:32:49,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:49,283 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-05-06 11:32:49,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 11:32:49,283 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:32:49,284 INFO L523 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:32:49,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-06 11:32:49,284 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:32:49,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:32:49,284 INFO L82 PathProgramCache]: Analyzing trace with hash 815954666, now seen corresponding path program 8 times [2021-05-06 11:32:49,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:32:49,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1542604987] [2021-05-06 11:32:49,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:32:49,286 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:32:49,286 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:32:49,287 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:32:49,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:49,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:32:49,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:49,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:32:49,404 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:32:49,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1542604987] [2021-05-06 11:32:49,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1542604987] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:32:49,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:32:49,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-06 11:32:49,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25531272] [2021-05-06 11:32:49,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 11:32:49,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:32:49,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 11:32:49,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-06 11:32:49,408 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:49,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:32:49,684 INFO L93 Difference]: Finished difference Result 104 states and 135 transitions. [2021-05-06 11:32:49,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 11:32:49,684 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-05-06 11:32:49,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:32:49,685 INFO L225 Difference]: With dead ends: 104 [2021-05-06 11:32:49,685 INFO L226 Difference]: Without dead ends: 87 [2021-05-06 11:32:49,685 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 80.9ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-06 11:32:49,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-06 11:32:49,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 33. [2021-05-06 11:32:49,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:32:49,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-05-06 11:32:49,689 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 22 [2021-05-06 11:32:49,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:32:49,690 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-05-06 11:32:49,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:49,690 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-05-06 11:32:49,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 11:32:49,690 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:32:49,690 INFO L523 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:32:49,690 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-06 11:32:49,690 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:32:49,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:32:49,691 INFO L82 PathProgramCache]: Analyzing trace with hash -339929038, now seen corresponding path program 9 times [2021-05-06 11:32:49,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:32:49,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1677102299] [2021-05-06 11:32:49,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:32:49,693 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:32:49,693 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:32:49,694 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:32:49,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:49,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:32:49,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:49,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:32:49,810 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:32:49,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1677102299] [2021-05-06 11:32:49,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1677102299] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:32:49,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:32:49,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-06 11:32:49,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606864913] [2021-05-06 11:32:49,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 11:32:49,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:32:49,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 11:32:49,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-06 11:32:49,812 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:50,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:32:50,157 INFO L93 Difference]: Finished difference Result 111 states and 145 transitions. [2021-05-06 11:32:50,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 11:32:50,158 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-05-06 11:32:50,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:32:50,159 INFO L225 Difference]: With dead ends: 111 [2021-05-06 11:32:50,159 INFO L226 Difference]: Without dead ends: 94 [2021-05-06 11:32:50,159 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 87.4ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-06 11:32:50,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-06 11:32:50,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 34. [2021-05-06 11:32:50,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 27 states have internal predecessors, (29), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:32:50,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2021-05-06 11:32:50,164 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 23 [2021-05-06 11:32:50,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:32:50,164 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2021-05-06 11:32:50,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:50,164 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2021-05-06 11:32:50,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 11:32:50,164 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:32:50,164 INFO L523 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:32:50,165 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-06 11:32:50,165 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:32:50,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:32:50,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1812585494, now seen corresponding path program 10 times [2021-05-06 11:32:50,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:32:50,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809161507] [2021-05-06 11:32:50,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:32:50,168 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:32:50,168 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:32:50,169 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:32:50,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:50,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:32:50,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:50,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:32:50,330 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:32:50,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809161507] [2021-05-06 11:32:50,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1809161507] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:32:50,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:32:50,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-06 11:32:50,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729947787] [2021-05-06 11:32:50,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 11:32:50,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:32:50,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 11:32:50,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-06 11:32:50,331 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:50,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:32:50,713 INFO L93 Difference]: Finished difference Result 118 states and 155 transitions. [2021-05-06 11:32:50,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 11:32:50,714 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-05-06 11:32:50,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:32:50,714 INFO L225 Difference]: With dead ends: 118 [2021-05-06 11:32:50,715 INFO L226 Difference]: Without dead ends: 101 [2021-05-06 11:32:50,715 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 112.5ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-06 11:32:50,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-06 11:32:50,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 35. [2021-05-06 11:32:50,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 28 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:32:50,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-05-06 11:32:50,719 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 24 [2021-05-06 11:32:50,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:32:50,719 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-05-06 11:32:50,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:50,720 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-05-06 11:32:50,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-06 11:32:50,720 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:32:50,720 INFO L523 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:32:50,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-06 11:32:50,720 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:32:50,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:32:50,720 INFO L82 PathProgramCache]: Analyzing trace with hash -220295374, now seen corresponding path program 11 times [2021-05-06 11:32:50,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:32:50,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126979735] [2021-05-06 11:32:50,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:32:50,723 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:32:50,723 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:32:50,724 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:32:50,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:50,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:32:50,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:50,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:32:50,878 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:32:50,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126979735] [2021-05-06 11:32:50,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [126979735] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:32:50,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:32:50,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-06 11:32:50,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991956594] [2021-05-06 11:32:50,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 11:32:50,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:32:50,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 11:32:50,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-06 11:32:50,879 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:51,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:32:51,319 INFO L93 Difference]: Finished difference Result 125 states and 165 transitions. [2021-05-06 11:32:51,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 11:32:51,320 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-05-06 11:32:51,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:32:51,321 INFO L225 Difference]: With dead ends: 125 [2021-05-06 11:32:51,321 INFO L226 Difference]: Without dead ends: 108 [2021-05-06 11:32:51,323 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 122.2ms TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-06 11:32:51,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-06 11:32:51,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 36. [2021-05-06 11:32:51,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:32:51,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-05-06 11:32:51,328 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 25 [2021-05-06 11:32:51,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:32:51,328 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-05-06 11:32:51,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:51,328 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-05-06 11:32:51,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-06 11:32:51,329 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:32:51,329 INFO L523 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:32:51,329 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-06 11:32:51,329 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:32:51,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:32:51,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1896058090, now seen corresponding path program 12 times [2021-05-06 11:32:51,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:32:51,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452383620] [2021-05-06 11:32:51,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:32:51,331 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:32:51,332 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:32:51,332 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:32:51,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:51,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:32:51,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:51,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:32:51,485 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:32:51,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1452383620] [2021-05-06 11:32:51,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1452383620] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:32:51,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:32:51,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-06 11:32:51,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926662067] [2021-05-06 11:32:51,485 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 11:32:51,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:32:51,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 11:32:51,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-06 11:32:51,486 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:51,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:32:51,998 INFO L93 Difference]: Finished difference Result 132 states and 175 transitions. [2021-05-06 11:32:51,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 11:32:51,998 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-05-06 11:32:51,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:32:51,999 INFO L225 Difference]: With dead ends: 132 [2021-05-06 11:32:51,999 INFO L226 Difference]: Without dead ends: 115 [2021-05-06 11:32:52,000 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 119.7ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-06 11:32:52,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-05-06 11:32:52,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 37. [2021-05-06 11:32:52,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 states have internal predecessors, (32), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:32:52,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-05-06 11:32:52,004 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 26 [2021-05-06 11:32:52,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:32:52,009 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-05-06 11:32:52,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:52,010 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-05-06 11:32:52,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 11:32:52,012 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:32:52,012 INFO L523 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:32:52,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-06 11:32:52,012 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:32:52,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:32:52,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1216461262, now seen corresponding path program 13 times [2021-05-06 11:32:52,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:32:52,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1706326587] [2021-05-06 11:32:52,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:32:52,015 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:32:52,016 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:32:52,018 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:32:52,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:52,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:32:52,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:52,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:32:52,213 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:32:52,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1706326587] [2021-05-06 11:32:52,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1706326587] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:32:52,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:32:52,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-06 11:32:52,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273242242] [2021-05-06 11:32:52,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 11:32:52,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:32:52,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 11:32:52,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-06 11:32:52,214 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:52,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:32:52,759 INFO L93 Difference]: Finished difference Result 139 states and 185 transitions. [2021-05-06 11:32:52,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 11:32:52,760 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-05-06 11:32:52,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:32:52,761 INFO L225 Difference]: With dead ends: 139 [2021-05-06 11:32:52,761 INFO L226 Difference]: Without dead ends: 122 [2021-05-06 11:32:52,761 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 147.6ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-06 11:32:52,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-05-06 11:32:52,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 38. [2021-05-06 11:32:52,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:32:52,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-05-06 11:32:52,766 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 27 [2021-05-06 11:32:52,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:32:52,766 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-05-06 11:32:52,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:52,766 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-05-06 11:32:52,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 11:32:52,767 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:32:52,767 INFO L523 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:32:52,767 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-06 11:32:52,767 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:32:52,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:32:52,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1079686634, now seen corresponding path program 14 times [2021-05-06 11:32:52,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:32:52,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119659599] [2021-05-06 11:32:52,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:32:52,770 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:32:52,770 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:32:52,771 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:32:52,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:52,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:32:52,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:52,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:32:52,981 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:32:52,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119659599] [2021-05-06 11:32:52,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1119659599] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:32:52,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:32:52,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-06 11:32:52,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398769389] [2021-05-06 11:32:52,981 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 11:32:52,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:32:52,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 11:32:52,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-06 11:32:52,982 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:53,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:32:53,661 INFO L93 Difference]: Finished difference Result 146 states and 195 transitions. [2021-05-06 11:32:53,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 11:32:53,661 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-05-06 11:32:53,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:32:53,662 INFO L225 Difference]: With dead ends: 146 [2021-05-06 11:32:53,662 INFO L226 Difference]: Without dead ends: 129 [2021-05-06 11:32:53,663 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 140.7ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-06 11:32:53,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-06 11:32:53,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 39. [2021-05-06 11:32:53,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 31 states have (on average 1.096774193548387) internal successors, (34), 32 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:32:53,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2021-05-06 11:32:53,668 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 28 [2021-05-06 11:32:53,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:32:53,668 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2021-05-06 11:32:53,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:53,668 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2021-05-06 11:32:53,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 11:32:53,669 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:32:53,669 INFO L523 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:32:53,669 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-06 11:32:53,669 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:32:53,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:32:53,669 INFO L82 PathProgramCache]: Analyzing trace with hash -754172622, now seen corresponding path program 15 times [2021-05-06 11:32:53,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:32:53,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1195615251] [2021-05-06 11:32:53,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:32:53,676 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:32:53,676 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:32:53,677 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:32:53,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:53,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:32:53,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:53,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:32:53,916 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:32:53,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1195615251] [2021-05-06 11:32:53,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1195615251] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:32:53,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:32:53,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-05-06 11:32:53,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909856143] [2021-05-06 11:32:53,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 11:32:53,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:32:53,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 11:32:53,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-06 11:32:53,917 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:54,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:32:54,659 INFO L93 Difference]: Finished difference Result 153 states and 205 transitions. [2021-05-06 11:32:54,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-06 11:32:54,659 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-05-06 11:32:54,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:32:54,660 INFO L225 Difference]: With dead ends: 153 [2021-05-06 11:32:54,660 INFO L226 Difference]: Without dead ends: 136 [2021-05-06 11:32:54,661 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 184.4ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-06 11:32:54,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-06 11:32:54,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 40. [2021-05-06 11:32:54,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 32 states have (on average 1.09375) internal successors, (35), 33 states have internal predecessors, (35), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:32:54,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-05-06 11:32:54,670 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 29 [2021-05-06 11:32:54,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:32:54,670 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-05-06 11:32:54,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:54,670 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-05-06 11:32:54,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 11:32:54,671 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:32:54,671 INFO L523 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:32:54,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-06 11:32:54,671 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:32:54,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:32:54,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1769234710, now seen corresponding path program 16 times [2021-05-06 11:32:54,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:32:54,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [29388066] [2021-05-06 11:32:54,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:32:54,674 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:32:54,674 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:32:54,675 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:32:54,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:54,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:32:54,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:54,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:32:54,934 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:32:54,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [29388066] [2021-05-06 11:32:54,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [29388066] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:32:54,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:32:54,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-06 11:32:54,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097532949] [2021-05-06 11:32:54,935 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 11:32:54,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:32:54,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 11:32:54,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-05-06 11:32:54,936 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:56,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:32:56,052 INFO L93 Difference]: Finished difference Result 160 states and 215 transitions. [2021-05-06 11:32:56,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 11:32:56,053 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-05-06 11:32:56,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:32:56,056 INFO L225 Difference]: With dead ends: 160 [2021-05-06 11:32:56,056 INFO L226 Difference]: Without dead ends: 143 [2021-05-06 11:32:56,056 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 185.6ms TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-05-06 11:32:56,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-05-06 11:32:56,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 41. [2021-05-06 11:32:56,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 34 states have internal predecessors, (36), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:32:56,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2021-05-06 11:32:56,079 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 30 [2021-05-06 11:32:56,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:32:56,079 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2021-05-06 11:32:56,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:56,079 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2021-05-06 11:32:56,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-06 11:32:56,079 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:32:56,079 INFO L523 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:32:56,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-06 11:32:56,079 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:32:56,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:32:56,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1123578930, now seen corresponding path program 17 times [2021-05-06 11:32:56,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:32:56,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2057902622] [2021-05-06 11:32:56,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:32:56,084 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:32:56,084 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:32:56,085 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:32:56,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:56,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:32:56,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:56,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:32:56,353 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:32:56,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2057902622] [2021-05-06 11:32:56,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2057902622] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:32:56,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:32:56,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-06 11:32:56,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13945411] [2021-05-06 11:32:56,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-06 11:32:56,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:32:56,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-06 11:32:56,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-05-06 11:32:56,356 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:57,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:32:57,137 INFO L93 Difference]: Finished difference Result 167 states and 225 transitions. [2021-05-06 11:32:57,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-06 11:32:57,138 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-05-06 11:32:57,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:32:57,139 INFO L225 Difference]: With dead ends: 167 [2021-05-06 11:32:57,139 INFO L226 Difference]: Without dead ends: 150 [2021-05-06 11:32:57,139 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 205.2ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-05-06 11:32:57,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-05-06 11:32:57,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 42. [2021-05-06 11:32:57,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 34 states have (on average 1.088235294117647) internal successors, (37), 35 states have internal predecessors, (37), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:32:57,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2021-05-06 11:32:57,144 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 31 [2021-05-06 11:32:57,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:32:57,144 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2021-05-06 11:32:57,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:57,144 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2021-05-06 11:32:57,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 11:32:57,152 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:32:57,152 INFO L523 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:32:57,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-06 11:32:57,152 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:32:57,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:32:57,153 INFO L82 PathProgramCache]: Analyzing trace with hash 606488554, now seen corresponding path program 18 times [2021-05-06 11:32:57,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:32:57,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907924467] [2021-05-06 11:32:57,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:32:57,158 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:32:57,158 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:32:57,159 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:32:57,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:57,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:32:57,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:57,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:32:57,474 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:32:57,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907924467] [2021-05-06 11:32:57,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [907924467] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:32:57,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:32:57,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-06 11:32:57,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6759563] [2021-05-06 11:32:57,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-06 11:32:57,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:32:57,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-06 11:32:57,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-05-06 11:32:57,475 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:58,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:32:58,380 INFO L93 Difference]: Finished difference Result 174 states and 235 transitions. [2021-05-06 11:32:58,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-06 11:32:58,381 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-05-06 11:32:58,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:32:58,381 INFO L225 Difference]: With dead ends: 174 [2021-05-06 11:32:58,382 INFO L226 Difference]: Without dead ends: 157 [2021-05-06 11:32:58,382 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 250.7ms TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-05-06 11:32:58,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-05-06 11:32:58,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 43. [2021-05-06 11:32:58,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 36 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:32:58,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2021-05-06 11:32:58,387 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 32 [2021-05-06 11:32:58,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:32:58,387 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2021-05-06 11:32:58,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:58,387 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2021-05-06 11:32:58,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 11:32:58,387 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:32:58,387 INFO L523 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:32:58,388 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-06 11:32:58,388 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:32:58,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:32:58,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1756556082, now seen corresponding path program 19 times [2021-05-06 11:32:58,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:32:58,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1618223697] [2021-05-06 11:32:58,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:32:58,394 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:32:58,395 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:32:58,395 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:32:58,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:58,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:32:58,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:58,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:32:58,888 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:32:58,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1618223697] [2021-05-06 11:32:58,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1618223697] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:32:58,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:32:58,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-05-06 11:32:58,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634061024] [2021-05-06 11:32:58,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-06 11:32:58,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:32:58,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-06 11:32:58,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-05-06 11:32:58,889 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:59,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:32:59,891 INFO L93 Difference]: Finished difference Result 181 states and 245 transitions. [2021-05-06 11:32:59,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-06 11:32:59,891 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-05-06 11:32:59,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:32:59,896 INFO L225 Difference]: With dead ends: 181 [2021-05-06 11:32:59,896 INFO L226 Difference]: Without dead ends: 164 [2021-05-06 11:32:59,896 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 350.5ms TimeCoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-05-06 11:32:59,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-06 11:32:59,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 44. [2021-05-06 11:32:59,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 37 states have internal predecessors, (39), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:32:59,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-05-06 11:32:59,916 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 33 [2021-05-06 11:32:59,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:32:59,916 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-05-06 11:32:59,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:59,917 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-05-06 11:32:59,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 11:32:59,917 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:32:59,917 INFO L523 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:32:59,917 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-06 11:32:59,917 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:32:59,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:32:59,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1246056214, now seen corresponding path program 20 times [2021-05-06 11:32:59,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:32:59,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [82617020] [2021-05-06 11:32:59,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:32:59,931 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:32:59,931 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:32:59,932 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:32:59,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:00,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:33:00,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:00,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:33:00,298 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:33:00,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [82617020] [2021-05-06 11:33:00,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [82617020] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:33:00,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:33:00,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-06 11:33:00,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306867678] [2021-05-06 11:33:00,305 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-06 11:33:00,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:33:00,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-06 11:33:00,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-05-06 11:33:00,306 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:01,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:33:01,383 INFO L93 Difference]: Finished difference Result 188 states and 255 transitions. [2021-05-06 11:33:01,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-06 11:33:01,385 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-05-06 11:33:01,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:33:01,386 INFO L225 Difference]: With dead ends: 188 [2021-05-06 11:33:01,386 INFO L226 Difference]: Without dead ends: 171 [2021-05-06 11:33:01,386 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 260.7ms TimeCoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-05-06 11:33:01,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-05-06 11:33:01,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 45. [2021-05-06 11:33:01,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 38 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:33:01,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-05-06 11:33:01,391 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 34 [2021-05-06 11:33:01,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:33:01,391 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-05-06 11:33:01,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:01,391 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-05-06 11:33:01,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-06 11:33:01,392 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:33:01,392 INFO L523 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:33:01,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-06 11:33:01,392 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:33:01,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:33:01,392 INFO L82 PathProgramCache]: Analyzing trace with hash 162243122, now seen corresponding path program 21 times [2021-05-06 11:33:01,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:33:01,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1411541956] [2021-05-06 11:33:01,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:33:01,395 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:33:01,395 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:33:01,396 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:33:01,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:01,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:33:01,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:01,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:33:01,729 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:33:01,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1411541956] [2021-05-06 11:33:01,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1411541956] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:33:01,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:33:01,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-05-06 11:33:01,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012822031] [2021-05-06 11:33:01,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-06 11:33:01,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:33:01,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-06 11:33:01,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-05-06 11:33:01,731 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:02,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:33:02,900 INFO L93 Difference]: Finished difference Result 195 states and 265 transitions. [2021-05-06 11:33:02,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-06 11:33:02,901 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-05-06 11:33:02,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:33:02,902 INFO L225 Difference]: With dead ends: 195 [2021-05-06 11:33:02,902 INFO L226 Difference]: Without dead ends: 178 [2021-05-06 11:33:02,902 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 265.2ms TimeCoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-05-06 11:33:02,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-05-06 11:33:02,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 46. [2021-05-06 11:33:02,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 39 states have internal predecessors, (41), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:33:02,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2021-05-06 11:33:02,907 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 35 [2021-05-06 11:33:02,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:33:02,907 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2021-05-06 11:33:02,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:02,907 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2021-05-06 11:33:02,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 11:33:02,908 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:33:02,908 INFO L523 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:33:02,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-06 11:33:02,908 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:33:02,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:33:02,908 INFO L82 PathProgramCache]: Analyzing trace with hash 869849578, now seen corresponding path program 22 times [2021-05-06 11:33:02,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:33:02,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026115562] [2021-05-06 11:33:02,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:33:02,910 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:33:02,910 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:33:02,911 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:33:02,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:03,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:33:03,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:03,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:33:03,242 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:33:03,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026115562] [2021-05-06 11:33:03,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2026115562] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:33:03,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:33:03,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-06 11:33:03,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913027538] [2021-05-06 11:33:03,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-06 11:33:03,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:33:03,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-06 11:33:03,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-05-06 11:33:03,243 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:04,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:33:04,570 INFO L93 Difference]: Finished difference Result 202 states and 275 transitions. [2021-05-06 11:33:04,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-06 11:33:04,571 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-05-06 11:33:04,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:33:04,572 INFO L225 Difference]: With dead ends: 202 [2021-05-06 11:33:04,572 INFO L226 Difference]: Without dead ends: 185 [2021-05-06 11:33:04,573 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 283.9ms TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-05-06 11:33:04,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-05-06 11:33:04,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 47. [2021-05-06 11:33:04,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 40 states have internal predecessors, (42), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:33:04,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2021-05-06 11:33:04,578 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 36 [2021-05-06 11:33:04,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:33:04,578 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2021-05-06 11:33:04,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:04,578 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2021-05-06 11:33:04,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 11:33:04,579 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:33:04,579 INFO L523 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:33:04,579 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-06 11:33:04,579 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:33:04,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:33:04,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1330813234, now seen corresponding path program 23 times [2021-05-06 11:33:04,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:33:04,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142438743] [2021-05-06 11:33:04,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:33:04,582 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:33:04,582 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:33:04,583 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:33:04,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:04,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:33:04,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:04,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:33:04,926 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:33:04,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142438743] [2021-05-06 11:33:04,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1142438743] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:33:04,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:33:04,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-05-06 11:33:04,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824521770] [2021-05-06 11:33:04,926 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-06 11:33:04,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:33:04,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-06 11:33:04,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2021-05-06 11:33:04,927 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:06,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:33:06,294 INFO L93 Difference]: Finished difference Result 209 states and 285 transitions. [2021-05-06 11:33:06,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-06 11:33:06,294 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-05-06 11:33:06,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:33:06,295 INFO L225 Difference]: With dead ends: 209 [2021-05-06 11:33:06,295 INFO L226 Difference]: Without dead ends: 192 [2021-05-06 11:33:06,296 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 299.6ms TimeCoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2021-05-06 11:33:06,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-05-06 11:33:06,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 48. [2021-05-06 11:33:06,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 40 states have (on average 1.075) internal successors, (43), 41 states have internal predecessors, (43), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:33:06,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2021-05-06 11:33:06,302 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 37 [2021-05-06 11:33:06,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:33:06,302 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2021-05-06 11:33:06,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:06,302 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2021-05-06 11:33:06,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 11:33:06,302 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:33:06,302 INFO L523 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:33:06,302 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-06 11:33:06,302 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:33:06,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:33:06,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1559182614, now seen corresponding path program 24 times [2021-05-06 11:33:06,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:33:06,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572406707] [2021-05-06 11:33:06,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:33:06,305 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:33:06,306 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:33:06,306 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:33:06,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:06,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:33:06,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:06,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:33:06,706 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:33:06,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572406707] [2021-05-06 11:33:06,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1572406707] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:33:06,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:33:06,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-05-06 11:33:06,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092751202] [2021-05-06 11:33:06,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-06 11:33:06,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:33:06,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-06 11:33:06,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-05-06 11:33:06,707 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:08,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:33:08,214 INFO L93 Difference]: Finished difference Result 216 states and 295 transitions. [2021-05-06 11:33:08,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-06 11:33:08,214 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-05-06 11:33:08,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:33:08,216 INFO L225 Difference]: With dead ends: 216 [2021-05-06 11:33:08,216 INFO L226 Difference]: Without dead ends: 199 [2021-05-06 11:33:08,216 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 340.8ms TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-05-06 11:33:08,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-05-06 11:33:08,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 49. [2021-05-06 11:33:08,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 42 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:33:08,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2021-05-06 11:33:08,222 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 38 [2021-05-06 11:33:08,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:33:08,222 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2021-05-06 11:33:08,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:08,223 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2021-05-06 11:33:08,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 11:33:08,223 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:33:08,223 INFO L523 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:33:08,223 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-06 11:33:08,223 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:33:08,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:33:08,223 INFO L82 PathProgramCache]: Analyzing trace with hash -954740686, now seen corresponding path program 25 times [2021-05-06 11:33:08,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:33:08,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776887370] [2021-05-06 11:33:08,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:33:08,227 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:33:08,227 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:33:08,228 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:33:08,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:08,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:33:08,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:08,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:33:08,622 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:33:08,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776887370] [2021-05-06 11:33:08,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [776887370] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:33:08,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:33:08,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-05-06 11:33:08,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22677639] [2021-05-06 11:33:08,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-06 11:33:08,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:33:08,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-06 11:33:08,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2021-05-06 11:33:08,623 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:10,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:33:10,208 INFO L93 Difference]: Finished difference Result 223 states and 305 transitions. [2021-05-06 11:33:10,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-06 11:33:10,209 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2021-05-06 11:33:10,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:33:10,209 INFO L225 Difference]: With dead ends: 223 [2021-05-06 11:33:10,210 INFO L226 Difference]: Without dead ends: 206 [2021-05-06 11:33:10,210 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 344.4ms TimeCoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2021-05-06 11:33:10,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-05-06 11:33:10,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 50. [2021-05-06 11:33:10,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 43 states have internal predecessors, (45), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:33:10,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2021-05-06 11:33:10,217 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 39 [2021-05-06 11:33:10,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:33:10,217 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2021-05-06 11:33:10,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:10,217 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2021-05-06 11:33:10,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-06 11:33:10,217 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:33:10,217 INFO L523 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:33:10,217 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-06 11:33:10,218 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:33:10,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:33:10,218 INFO L82 PathProgramCache]: Analyzing trace with hash 603089898, now seen corresponding path program 26 times [2021-05-06 11:33:10,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:33:10,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [733990569] [2021-05-06 11:33:10,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:33:10,220 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:33:10,220 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:33:10,221 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:33:10,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:10,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:33:10,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:10,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:33:10,673 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:33:10,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [733990569] [2021-05-06 11:33:10,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [733990569] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:33:10,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:33:10,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-05-06 11:33:10,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232073638] [2021-05-06 11:33:10,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-06 11:33:10,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:33:10,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-06 11:33:10,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2021-05-06 11:33:10,674 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 30 states, 30 states have (on average 1.2) internal successors, (36), 29 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:12,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:33:12,325 INFO L93 Difference]: Finished difference Result 230 states and 315 transitions. [2021-05-06 11:33:12,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-06 11:33:12,325 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.2) internal successors, (36), 29 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-05-06 11:33:12,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:33:12,326 INFO L225 Difference]: With dead ends: 230 [2021-05-06 11:33:12,326 INFO L226 Difference]: Without dead ends: 213 [2021-05-06 11:33:12,327 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 390.1ms TimeCoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2021-05-06 11:33:12,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-05-06 11:33:12,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 51. [2021-05-06 11:33:12,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.069767441860465) internal successors, (46), 44 states have internal predecessors, (46), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:33:12,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2021-05-06 11:33:12,333 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 40 [2021-05-06 11:33:12,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:33:12,334 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2021-05-06 11:33:12,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.2) internal successors, (36), 29 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:12,334 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2021-05-06 11:33:12,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-06 11:33:12,334 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:33:12,334 INFO L523 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:33:12,334 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-05-06 11:33:12,334 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:33:12,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:33:12,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1651197746, now seen corresponding path program 27 times [2021-05-06 11:33:12,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:33:12,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145807562] [2021-05-06 11:33:12,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:33:12,337 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:33:12,337 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:33:12,338 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:33:12,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:12,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:33:12,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:12,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:33:12,789 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:33:12,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145807562] [2021-05-06 11:33:12,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [145807562] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:33:12,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:33:12,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-05-06 11:33:12,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760443639] [2021-05-06 11:33:12,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-06 11:33:12,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:33:12,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-06 11:33:12,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2021-05-06 11:33:12,790 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:14,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:33:14,552 INFO L93 Difference]: Finished difference Result 237 states and 325 transitions. [2021-05-06 11:33:14,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-06 11:33:14,553 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2021-05-06 11:33:14,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:33:14,554 INFO L225 Difference]: With dead ends: 237 [2021-05-06 11:33:14,554 INFO L226 Difference]: Without dead ends: 220 [2021-05-06 11:33:14,554 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 388.1ms TimeCoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2021-05-06 11:33:14,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-05-06 11:33:14,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 52. [2021-05-06 11:33:14,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 45 states have internal predecessors, (47), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:33:14,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2021-05-06 11:33:14,562 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 41 [2021-05-06 11:33:14,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:33:14,562 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2021-05-06 11:33:14,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:14,562 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2021-05-06 11:33:14,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 11:33:14,562 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:33:14,563 INFO L523 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:33:14,563 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-05-06 11:33:14,563 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:33:14,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:33:14,563 INFO L82 PathProgramCache]: Analyzing trace with hash -217197334, now seen corresponding path program 28 times [2021-05-06 11:33:14,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:33:14,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436967841] [2021-05-06 11:33:14,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:33:14,565 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:33:14,565 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:33:14,566 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:33:14,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:15,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:33:15,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:15,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:33:15,051 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:33:15,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436967841] [2021-05-06 11:33:15,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [436967841] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:33:15,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:33:15,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2021-05-06 11:33:15,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409857900] [2021-05-06 11:33:15,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-06 11:33:15,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:33:15,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-06 11:33:15,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2021-05-06 11:33:15,053 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:16,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:33:16,954 INFO L93 Difference]: Finished difference Result 244 states and 335 transitions. [2021-05-06 11:33:16,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-06 11:33:16,969 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-05-06 11:33:16,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:33:16,970 INFO L225 Difference]: With dead ends: 244 [2021-05-06 11:33:16,970 INFO L226 Difference]: Without dead ends: 227 [2021-05-06 11:33:16,970 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 429.7ms TimeCoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2021-05-06 11:33:16,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-05-06 11:33:16,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 53. [2021-05-06 11:33:16,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 46 states have internal predecessors, (48), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:33:16,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2021-05-06 11:33:16,979 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 42 [2021-05-06 11:33:16,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:33:16,980 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2021-05-06 11:33:16,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:16,980 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2021-05-06 11:33:16,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 11:33:16,980 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:33:16,980 INFO L523 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:33:16,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-05-06 11:33:16,980 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:33:16,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:33:16,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1992097330, now seen corresponding path program 29 times [2021-05-06 11:33:16,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:33:16,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143955650] [2021-05-06 11:33:16,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:33:16,983 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:33:16,983 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:33:16,985 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:33:17,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:17,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:33:17,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:17,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:33:17,644 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:33:17,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143955650] [2021-05-06 11:33:17,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [143955650] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:33:17,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:33:17,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2021-05-06 11:33:17,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665594405] [2021-05-06 11:33:17,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-06 11:33:17,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:33:17,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-06 11:33:17,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2021-05-06 11:33:17,645 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:19,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:33:19,811 INFO L93 Difference]: Finished difference Result 251 states and 345 transitions. [2021-05-06 11:33:19,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-06 11:33:19,811 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2021-05-06 11:33:19,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:33:19,812 INFO L225 Difference]: With dead ends: 251 [2021-05-06 11:33:19,812 INFO L226 Difference]: Without dead ends: 234 [2021-05-06 11:33:19,813 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 593.2ms TimeCoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2021-05-06 11:33:19,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-05-06 11:33:19,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 54. [2021-05-06 11:33:19,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.065217391304348) internal successors, (49), 47 states have internal predecessors, (49), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:33:19,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2021-05-06 11:33:19,822 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 43 [2021-05-06 11:33:19,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:33:19,822 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2021-05-06 11:33:19,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:19,822 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2021-05-06 11:33:19,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 11:33:19,822 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:33:19,823 INFO L523 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:33:19,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-05-06 11:33:19,823 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:33:19,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:33:19,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1760755178, now seen corresponding path program 30 times [2021-05-06 11:33:19,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:33:19,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861445804] [2021-05-06 11:33:19,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:33:19,825 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:33:19,825 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:33:19,826 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:33:19,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:20,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:33:20,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:20,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:33:20,351 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:33:20,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861445804] [2021-05-06 11:33:20,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [861445804] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:33:20,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:33:20,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2021-05-06 11:33:20,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082740153] [2021-05-06 11:33:20,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-06 11:33:20,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:33:20,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-06 11:33:20,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2021-05-06 11:33:20,352 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:22,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:33:22,531 INFO L93 Difference]: Finished difference Result 258 states and 355 transitions. [2021-05-06 11:33:22,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-06 11:33:22,532 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-05-06 11:33:22,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:33:22,533 INFO L225 Difference]: With dead ends: 258 [2021-05-06 11:33:22,533 INFO L226 Difference]: Without dead ends: 241 [2021-05-06 11:33:22,534 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 462.0ms TimeCoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2021-05-06 11:33:22,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-05-06 11:33:22,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 55. [2021-05-06 11:33:22,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 48 states have internal predecessors, (50), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:33:22,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2021-05-06 11:33:22,543 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 44 [2021-05-06 11:33:22,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:33:22,544 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2021-05-06 11:33:22,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:22,544 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2021-05-06 11:33:22,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 11:33:22,544 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:33:22,544 INFO L523 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:33:22,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-05-06 11:33:22,544 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:33:22,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:33:22,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1115884238, now seen corresponding path program 31 times [2021-05-06 11:33:22,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:33:22,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235315862] [2021-05-06 11:33:22,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:33:22,547 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:33:22,548 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:33:22,548 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:33:22,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:23,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:33:23,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:23,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:33:23,101 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:33:23,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1235315862] [2021-05-06 11:33:23,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1235315862] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:33:23,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:33:23,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2021-05-06 11:33:23,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350989011] [2021-05-06 11:33:23,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-06 11:33:23,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:33:23,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-06 11:33:23,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2021-05-06 11:33:23,102 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:25,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:33:25,408 INFO L93 Difference]: Finished difference Result 265 states and 365 transitions. [2021-05-06 11:33:25,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-06 11:33:25,408 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-05-06 11:33:25,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:33:25,409 INFO L225 Difference]: With dead ends: 265 [2021-05-06 11:33:25,409 INFO L226 Difference]: Without dead ends: 248 [2021-05-06 11:33:25,410 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 496.4ms TimeCoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2021-05-06 11:33:25,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-05-06 11:33:25,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 56. [2021-05-06 11:33:25,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 48 states have (on average 1.0625) internal successors, (51), 49 states have internal predecessors, (51), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:33:25,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2021-05-06 11:33:25,423 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 45 [2021-05-06 11:33:25,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:33:25,423 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2021-05-06 11:33:25,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:25,423 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2021-05-06 11:33:25,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-06 11:33:25,423 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:33:25,424 INFO L523 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:33:25,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-05-06 11:33:25,424 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:33:25,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:33:25,424 INFO L82 PathProgramCache]: Analyzing trace with hash -97392918, now seen corresponding path program 32 times [2021-05-06 11:33:25,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:33:25,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952387771] [2021-05-06 11:33:25,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:33:25,427 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:33:25,427 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:33:25,428 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:33:25,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:26,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:33:26,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:26,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:33:26,045 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:33:26,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952387771] [2021-05-06 11:33:26,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [952387771] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:33:26,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:33:26,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2021-05-06 11:33:26,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861617424] [2021-05-06 11:33:26,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-06 11:33:26,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:33:26,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-06 11:33:26,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2021-05-06 11:33:26,046 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 36 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 35 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:28,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:33:28,504 INFO L93 Difference]: Finished difference Result 272 states and 375 transitions. [2021-05-06 11:33:28,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-06 11:33:28,506 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 35 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-05-06 11:33:28,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:33:28,508 INFO L225 Difference]: With dead ends: 272 [2021-05-06 11:33:28,508 INFO L226 Difference]: Without dead ends: 255 [2021-05-06 11:33:28,508 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 541.5ms TimeCoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2021-05-06 11:33:28,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-05-06 11:33:28,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 57. [2021-05-06 11:33:28,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 50 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:33:28,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2021-05-06 11:33:28,518 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 46 [2021-05-06 11:33:28,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:33:28,518 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2021-05-06 11:33:28,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 35 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:28,519 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2021-05-06 11:33:28,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 11:33:28,519 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:33:28,519 INFO L523 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:33:28,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-05-06 11:33:28,519 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:33:28,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:33:28,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1411066930, now seen corresponding path program 33 times [2021-05-06 11:33:28,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:33:28,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381745790] [2021-05-06 11:33:28,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:33:28,522 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:33:28,522 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:33:28,522 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:33:28,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:29,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:33:29,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:29,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:33:29,141 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:33:29,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381745790] [2021-05-06 11:33:29,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [381745790] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:33:29,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:33:29,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2021-05-06 11:33:29,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488459071] [2021-05-06 11:33:29,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-06 11:33:29,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:33:29,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-06 11:33:29,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2021-05-06 11:33:29,143 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 36 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:31,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:33:31,804 INFO L93 Difference]: Finished difference Result 279 states and 385 transitions. [2021-05-06 11:33:31,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-06 11:33:31,805 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 36 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2021-05-06 11:33:31,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:33:31,806 INFO L225 Difference]: With dead ends: 279 [2021-05-06 11:33:31,806 INFO L226 Difference]: Without dead ends: 262 [2021-05-06 11:33:31,806 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 558.9ms TimeCoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2021-05-06 11:33:31,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-05-06 11:33:31,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 58. [2021-05-06 11:33:31,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 50 states have (on average 1.06) internal successors, (53), 51 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:33:31,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2021-05-06 11:33:31,817 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 47 [2021-05-06 11:33:31,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:33:31,817 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2021-05-06 11:33:31,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 36 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:31,817 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2021-05-06 11:33:31,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-06 11:33:31,817 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:33:31,817 INFO L523 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:33:31,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-05-06 11:33:31,817 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:33:31,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:33:31,818 INFO L82 PathProgramCache]: Analyzing trace with hash 928681962, now seen corresponding path program 34 times [2021-05-06 11:33:31,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:33:31,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1009907627] [2021-05-06 11:33:31,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:33:31,820 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:33:31,820 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:33:31,821 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:33:31,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:32,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:33:32,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:32,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:33:32,455 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:33:32,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1009907627] [2021-05-06 11:33:32,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1009907627] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:33:32,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:33:32,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2021-05-06 11:33:32,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861640834] [2021-05-06 11:33:32,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-06 11:33:32,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:33:32,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-06 11:33:32,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2021-05-06 11:33:32,456 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand has 38 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 37 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:35,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:33:35,274 INFO L93 Difference]: Finished difference Result 286 states and 395 transitions. [2021-05-06 11:33:35,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-06 11:33:35,274 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 37 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-05-06 11:33:35,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:33:35,275 INFO L225 Difference]: With dead ends: 286 [2021-05-06 11:33:35,275 INFO L226 Difference]: Without dead ends: 269 [2021-05-06 11:33:35,276 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 576.2ms TimeCoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2021-05-06 11:33:35,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-05-06 11:33:35,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 59. [2021-05-06 11:33:35,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 52 states have internal predecessors, (54), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:33:35,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2021-05-06 11:33:35,287 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 48 [2021-05-06 11:33:35,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:33:35,287 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2021-05-06 11:33:35,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 37 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:35,287 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2021-05-06 11:33:35,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-06 11:33:35,287 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:33:35,288 INFO L523 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:33:35,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-05-06 11:33:35,288 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:33:35,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:33:35,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1140350158, now seen corresponding path program 35 times [2021-05-06 11:33:35,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:33:35,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1299739925] [2021-05-06 11:33:35,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:33:35,290 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:33:35,290 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:33:35,291 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:33:35,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:35,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:33:35,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:36,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:33:36,005 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:33:36,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1299739925] [2021-05-06 11:33:36,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1299739925] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:33:36,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:33:36,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2021-05-06 11:33:36,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901659956] [2021-05-06 11:33:36,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-06 11:33:36,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:33:36,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-06 11:33:36,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-05-06 11:33:36,007 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:38,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:33:38,985 INFO L93 Difference]: Finished difference Result 293 states and 405 transitions. [2021-05-06 11:33:38,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-06 11:33:38,986 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2021-05-06 11:33:38,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:33:38,993 INFO L225 Difference]: With dead ends: 293 [2021-05-06 11:33:38,993 INFO L226 Difference]: Without dead ends: 276 [2021-05-06 11:33:38,993 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 630.9ms TimeCoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-05-06 11:33:38,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-05-06 11:33:39,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 60. [2021-05-06 11:33:39,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 53 states have internal predecessors, (55), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:33:39,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2021-05-06 11:33:39,030 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 49 [2021-05-06 11:33:39,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:33:39,031 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2021-05-06 11:33:39,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:39,031 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2021-05-06 11:33:39,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 11:33:39,031 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:33:39,031 INFO L523 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:33:39,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-05-06 11:33:39,031 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:33:39,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:33:39,031 INFO L82 PathProgramCache]: Analyzing trace with hash -855836438, now seen corresponding path program 36 times [2021-05-06 11:33:39,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:33:39,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [194549059] [2021-05-06 11:33:39,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:33:39,036 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:33:39,036 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:33:39,036 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:33:39,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:39,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:33:39,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:40,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:33:40,001 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:33:40,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [194549059] [2021-05-06 11:33:40,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [194549059] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:33:40,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:33:40,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2021-05-06 11:33:40,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560070594] [2021-05-06 11:33:40,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-06 11:33:40,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:33:40,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-06 11:33:40,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1447, Unknown=0, NotChecked=0, Total=1560 [2021-05-06 11:33:40,003 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 40 states, 40 states have (on average 1.15) internal successors, (46), 39 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:43,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:33:43,169 INFO L93 Difference]: Finished difference Result 300 states and 415 transitions. [2021-05-06 11:33:43,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-06 11:33:43,170 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.15) internal successors, (46), 39 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-05-06 11:33:43,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:33:43,171 INFO L225 Difference]: With dead ends: 300 [2021-05-06 11:33:43,171 INFO L226 Difference]: Without dead ends: 283 [2021-05-06 11:33:43,172 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 845.1ms TimeCoverageRelationStatistics Valid=113, Invalid=1447, Unknown=0, NotChecked=0, Total=1560 [2021-05-06 11:33:43,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-05-06 11:33:43,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 61. [2021-05-06 11:33:43,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 54 states have internal predecessors, (56), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:33:43,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2021-05-06 11:33:43,183 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 50 [2021-05-06 11:33:43,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:33:43,184 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2021-05-06 11:33:43,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.15) internal successors, (46), 39 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:43,184 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2021-05-06 11:33:43,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-06 11:33:43,184 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:33:43,184 INFO L523 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:33:43,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-05-06 11:33:43,184 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:33:43,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:33:43,184 INFO L82 PathProgramCache]: Analyzing trace with hash -625845710, now seen corresponding path program 37 times [2021-05-06 11:33:43,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:33:43,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343605282] [2021-05-06 11:33:43,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:33:43,187 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:33:43,187 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:33:43,187 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:33:43,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:43,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:33:43,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:43,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:33:43,941 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:33:43,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343605282] [2021-05-06 11:33:43,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [343605282] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:33:43,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:33:43,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2021-05-06 11:33:43,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184809408] [2021-05-06 11:33:43,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-06 11:33:43,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:33:43,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-06 11:33:43,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2021-05-06 11:33:43,942 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:47,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:33:47,196 INFO L93 Difference]: Finished difference Result 307 states and 425 transitions. [2021-05-06 11:33:47,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-06 11:33:47,197 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-05-06 11:33:47,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:33:47,198 INFO L225 Difference]: With dead ends: 307 [2021-05-06 11:33:47,198 INFO L226 Difference]: Without dead ends: 290 [2021-05-06 11:33:47,199 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 685.3ms TimeCoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2021-05-06 11:33:47,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-05-06 11:33:47,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 62. [2021-05-06 11:33:47,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 55 states have internal predecessors, (57), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:33:47,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2021-05-06 11:33:47,212 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 51 [2021-05-06 11:33:47,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:33:47,212 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2021-05-06 11:33:47,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:47,212 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2021-05-06 11:33:47,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-06 11:33:47,212 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:33:47,212 INFO L523 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:33:47,213 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-05-06 11:33:47,213 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:33:47,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:33:47,213 INFO L82 PathProgramCache]: Analyzing trace with hash -2086067734, now seen corresponding path program 38 times [2021-05-06 11:33:47,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:33:47,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [28725801] [2021-05-06 11:33:47,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:33:47,215 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:33:47,215 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:33:47,216 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:33:47,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:47,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:33:47,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:47,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:33:47,982 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:33:47,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [28725801] [2021-05-06 11:33:47,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [28725801] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:33:47,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:33:47,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2021-05-06 11:33:47,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687898320] [2021-05-06 11:33:47,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-06 11:33:47,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:33:47,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-06 11:33:47,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1603, Unknown=0, NotChecked=0, Total=1722 [2021-05-06 11:33:47,984 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand has 42 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 41 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:51,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:33:51,464 INFO L93 Difference]: Finished difference Result 314 states and 435 transitions. [2021-05-06 11:33:51,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-06 11:33:51,464 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 41 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-05-06 11:33:51,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:33:51,466 INFO L225 Difference]: With dead ends: 314 [2021-05-06 11:33:51,466 INFO L226 Difference]: Without dead ends: 297 [2021-05-06 11:33:51,467 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 691.4ms TimeCoverageRelationStatistics Valid=119, Invalid=1603, Unknown=0, NotChecked=0, Total=1722 [2021-05-06 11:33:51,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-05-06 11:33:51,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 63. [2021-05-06 11:33:51,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 56 states have internal predecessors, (58), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:33:51,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2021-05-06 11:33:51,481 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 52 [2021-05-06 11:33:51,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:33:51,481 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2021-05-06 11:33:51,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 41 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:51,481 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2021-05-06 11:33:51,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-06 11:33:51,481 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:33:51,481 INFO L523 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:33:51,481 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-05-06 11:33:51,481 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:33:51,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:33:51,482 INFO L82 PathProgramCache]: Analyzing trace with hash -108310222, now seen corresponding path program 39 times [2021-05-06 11:33:51,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:33:51,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546278886] [2021-05-06 11:33:51,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:33:51,484 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:33:51,484 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:33:51,485 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:33:51,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:52,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:33:52,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:52,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:33:52,303 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:33:52,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546278886] [2021-05-06 11:33:52,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1546278886] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:33:52,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:33:52,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2021-05-06 11:33:52,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446970646] [2021-05-06 11:33:52,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-06 11:33:52,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:33:52,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-06 11:33:52,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2021-05-06 11:33:52,304 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand has 43 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 42 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:55,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:33:55,952 INFO L93 Difference]: Finished difference Result 321 states and 445 transitions. [2021-05-06 11:33:55,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-06 11:33:55,952 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 42 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2021-05-06 11:33:55,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:33:55,954 INFO L225 Difference]: With dead ends: 321 [2021-05-06 11:33:55,954 INFO L226 Difference]: Without dead ends: 304 [2021-05-06 11:33:55,954 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 751.8ms TimeCoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2021-05-06 11:33:55,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-05-06 11:33:55,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 64. [2021-05-06 11:33:55,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 57 states have internal predecessors, (59), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:33:55,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2021-05-06 11:33:55,969 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 53 [2021-05-06 11:33:55,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:33:55,969 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2021-05-06 11:33:55,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 42 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:55,969 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2021-05-06 11:33:55,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-06 11:33:55,970 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:33:55,970 INFO L523 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:33:55,970 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-05-06 11:33:55,970 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:33:55,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:33:55,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1072630506, now seen corresponding path program 40 times [2021-05-06 11:33:55,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:33:55,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238250785] [2021-05-06 11:33:55,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:33:55,972 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:33:55,972 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:33:55,973 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:33:55,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:56,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:33:56,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:56,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:33:56,820 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:33:56,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238250785] [2021-05-06 11:33:56,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [238250785] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:33:56,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:33:56,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2021-05-06 11:33:56,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579965720] [2021-05-06 11:33:56,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-06 11:33:56,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:33:56,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-06 11:33:56,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1767, Unknown=0, NotChecked=0, Total=1892 [2021-05-06 11:33:56,821 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 44 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 43 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:00,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:34:00,576 INFO L93 Difference]: Finished difference Result 328 states and 455 transitions. [2021-05-06 11:34:00,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-06 11:34:00,577 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 43 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2021-05-06 11:34:00,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:34:00,578 INFO L225 Difference]: With dead ends: 328 [2021-05-06 11:34:00,578 INFO L226 Difference]: Without dead ends: 311 [2021-05-06 11:34:00,578 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 781.1ms TimeCoverageRelationStatistics Valid=125, Invalid=1767, Unknown=0, NotChecked=0, Total=1892 [2021-05-06 11:34:00,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-05-06 11:34:00,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 65. [2021-05-06 11:34:00,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 58 states have internal predecessors, (60), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:34:00,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2021-05-06 11:34:00,594 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 54 [2021-05-06 11:34:00,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:34:00,595 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2021-05-06 11:34:00,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 43 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:00,595 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2021-05-06 11:34:00,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 11:34:00,595 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:34:00,595 INFO L523 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:34:00,595 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-05-06 11:34:00,595 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:34:00,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:34:00,595 INFO L82 PathProgramCache]: Analyzing trace with hash -972912590, now seen corresponding path program 41 times [2021-05-06 11:34:00,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:34:00,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [96847846] [2021-05-06 11:34:00,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:34:00,598 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:34:00,598 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:34:00,599 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:34:00,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:34:01,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:34:01,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:34:01,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:34:01,513 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:34:01,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [96847846] [2021-05-06 11:34:01,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [96847846] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:34:01,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:34:01,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2021-05-06 11:34:01,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605783576] [2021-05-06 11:34:01,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-05-06 11:34:01,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:34:01,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-05-06 11:34:01,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1852, Unknown=0, NotChecked=0, Total=1980 [2021-05-06 11:34:01,515 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 45 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 44 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:05,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:34:05,581 INFO L93 Difference]: Finished difference Result 335 states and 465 transitions. [2021-05-06 11:34:05,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-06 11:34:05,582 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 44 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-05-06 11:34:05,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:34:05,583 INFO L225 Difference]: With dead ends: 335 [2021-05-06 11:34:05,583 INFO L226 Difference]: Without dead ends: 318 [2021-05-06 11:34:05,584 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 830.0ms TimeCoverageRelationStatistics Valid=128, Invalid=1852, Unknown=0, NotChecked=0, Total=1980 [2021-05-06 11:34:05,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-05-06 11:34:05,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 66. [2021-05-06 11:34:05,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 59 states have internal predecessors, (61), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:34:05,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2021-05-06 11:34:05,601 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 55 [2021-05-06 11:34:05,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:34:05,601 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2021-05-06 11:34:05,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 44 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:05,601 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2021-05-06 11:34:05,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-06 11:34:05,601 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:34:05,601 INFO L523 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:34:05,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-05-06 11:34:05,601 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:34:05,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:34:05,602 INFO L82 PathProgramCache]: Analyzing trace with hash 39760874, now seen corresponding path program 42 times [2021-05-06 11:34:05,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:34:05,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872676512] [2021-05-06 11:34:05,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:34:05,604 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:34:05,604 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:34:05,605 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:34:05,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:34:06,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:34:06,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:34:06,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:34:06,523 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:34:06,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872676512] [2021-05-06 11:34:06,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1872676512] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:34:06,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:34:06,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2021-05-06 11:34:06,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690681647] [2021-05-06 11:34:06,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-06 11:34:06,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:34:06,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-06 11:34:06,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1939, Unknown=0, NotChecked=0, Total=2070 [2021-05-06 11:34:06,525 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand has 46 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 45 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:10,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:34:10,706 INFO L93 Difference]: Finished difference Result 342 states and 475 transitions. [2021-05-06 11:34:10,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-06 11:34:10,707 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 45 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2021-05-06 11:34:10,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:34:10,708 INFO L225 Difference]: With dead ends: 342 [2021-05-06 11:34:10,708 INFO L226 Difference]: Without dead ends: 325 [2021-05-06 11:34:10,709 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 839.4ms TimeCoverageRelationStatistics Valid=131, Invalid=1939, Unknown=0, NotChecked=0, Total=2070 [2021-05-06 11:34:10,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-05-06 11:34:10,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 67. [2021-05-06 11:34:10,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 60 states have internal predecessors, (62), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:34:10,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2021-05-06 11:34:10,726 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 56 [2021-05-06 11:34:10,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:34:10,726 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2021-05-06 11:34:10,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 45 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:10,727 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2021-05-06 11:34:10,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-06 11:34:10,727 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:34:10,727 INFO L523 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:34:10,727 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-05-06 11:34:10,727 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:34:10,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:34:10,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1367867186, now seen corresponding path program 43 times [2021-05-06 11:34:10,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:34:10,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144881686] [2021-05-06 11:34:10,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:34:10,729 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:34:10,729 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:34:10,730 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:34:10,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:34:11,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:34:11,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:34:11,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:34:11,669 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:34:11,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144881686] [2021-05-06 11:34:11,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [144881686] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:34:11,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:34:11,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-05-06 11:34:11,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574871723] [2021-05-06 11:34:11,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-06 11:34:11,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:34:11,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-06 11:34:11,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2028, Unknown=0, NotChecked=0, Total=2162 [2021-05-06 11:34:11,670 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand has 47 states, 47 states have (on average 1.127659574468085) internal successors, (53), 46 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:16,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:34:16,168 INFO L93 Difference]: Finished difference Result 349 states and 485 transitions. [2021-05-06 11:34:16,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-06 11:34:16,168 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.127659574468085) internal successors, (53), 46 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2021-05-06 11:34:16,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:34:16,170 INFO L225 Difference]: With dead ends: 349 [2021-05-06 11:34:16,170 INFO L226 Difference]: Without dead ends: 332 [2021-05-06 11:34:16,170 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 861.2ms TimeCoverageRelationStatistics Valid=134, Invalid=2028, Unknown=0, NotChecked=0, Total=2162 [2021-05-06 11:34:16,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-05-06 11:34:16,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 68. [2021-05-06 11:34:16,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 60 states have (on average 1.05) internal successors, (63), 61 states have internal predecessors, (63), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:34:16,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2021-05-06 11:34:16,191 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 57 [2021-05-06 11:34:16,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:34:16,191 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2021-05-06 11:34:16,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.127659574468085) internal successors, (53), 46 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:16,191 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2021-05-06 11:34:16,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 11:34:16,191 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:34:16,191 INFO L523 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:34:16,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-05-06 11:34:16,192 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:34:16,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:34:16,192 INFO L82 PathProgramCache]: Analyzing trace with hash -410510102, now seen corresponding path program 44 times [2021-05-06 11:34:16,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:34:16,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [573532162] [2021-05-06 11:34:16,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:34:16,194 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:34:16,194 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:34:16,195 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:34:16,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:34:17,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:34:17,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:34:17,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:34:17,215 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:34:17,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [573532162] [2021-05-06 11:34:17,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [573532162] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:34:17,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:34:17,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2021-05-06 11:34:17,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038344792] [2021-05-06 11:34:17,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-06 11:34:17,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:34:17,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-06 11:34:17,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2119, Unknown=0, NotChecked=0, Total=2256 [2021-05-06 11:34:17,216 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand has 48 states, 48 states have (on average 1.125) internal successors, (54), 47 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:21,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:34:21,923 INFO L93 Difference]: Finished difference Result 356 states and 495 transitions. [2021-05-06 11:34:21,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-06 11:34:21,924 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.125) internal successors, (54), 47 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2021-05-06 11:34:21,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:34:21,925 INFO L225 Difference]: With dead ends: 356 [2021-05-06 11:34:21,925 INFO L226 Difference]: Without dead ends: 339 [2021-05-06 11:34:21,925 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 934.7ms TimeCoverageRelationStatistics Valid=137, Invalid=2119, Unknown=0, NotChecked=0, Total=2256 [2021-05-06 11:34:21,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-05-06 11:34:21,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 69. [2021-05-06 11:34:21,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 62 states have internal predecessors, (64), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:34:21,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2021-05-06 11:34:21,948 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 58 [2021-05-06 11:34:21,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:34:21,948 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2021-05-06 11:34:21,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 1.125) internal successors, (54), 47 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:21,948 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2021-05-06 11:34:21,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-06 11:34:21,949 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:34:21,949 INFO L523 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:34:21,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-05-06 11:34:21,949 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:34:21,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:34:21,949 INFO L82 PathProgramCache]: Analyzing trace with hash 294368818, now seen corresponding path program 45 times [2021-05-06 11:34:21,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:34:21,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007305690] [2021-05-06 11:34:21,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:34:21,951 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:34:21,951 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:34:21,952 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:34:21,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:34:23,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:34:23,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:34:23,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:34:23,017 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:34:23,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007305690] [2021-05-06 11:34:23,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2007305690] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:34:23,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:34:23,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2021-05-06 11:34:23,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936499986] [2021-05-06 11:34:23,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-06 11:34:23,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:34:23,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-06 11:34:23,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2212, Unknown=0, NotChecked=0, Total=2352 [2021-05-06 11:34:23,019 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:28,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:34:28,174 INFO L93 Difference]: Finished difference Result 363 states and 505 transitions. [2021-05-06 11:34:28,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-06 11:34:28,174 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2021-05-06 11:34:28,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:34:28,176 INFO L225 Difference]: With dead ends: 363 [2021-05-06 11:34:28,176 INFO L226 Difference]: Without dead ends: 346 [2021-05-06 11:34:28,176 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 984.6ms TimeCoverageRelationStatistics Valid=140, Invalid=2212, Unknown=0, NotChecked=0, Total=2352 [2021-05-06 11:34:28,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-05-06 11:34:28,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 70. [2021-05-06 11:34:28,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 63 states have internal predecessors, (65), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:34:28,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2021-05-06 11:34:28,223 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 59 [2021-05-06 11:34:28,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:34:28,223 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2021-05-06 11:34:28,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:28,223 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2021-05-06 11:34:28,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-06 11:34:28,223 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:34:28,223 INFO L523 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:34:28,223 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-05-06 11:34:28,223 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:34:28,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:34:28,224 INFO L82 PathProgramCache]: Analyzing trace with hash 670778858, now seen corresponding path program 46 times [2021-05-06 11:34:28,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:34:28,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589056635] [2021-05-06 11:34:28,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:34:28,247 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:34:28,247 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:34:28,248 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:34:28,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:34:29,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:34:29,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:34:29,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:34:29,543 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:34:29,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589056635] [2021-05-06 11:34:29,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [589056635] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:34:29,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:34:29,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2021-05-06 11:34:29,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208333468] [2021-05-06 11:34:29,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-06 11:34:29,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:34:29,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-06 11:34:29,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2307, Unknown=0, NotChecked=0, Total=2450 [2021-05-06 11:34:29,544 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand has 50 states, 50 states have (on average 1.12) internal successors, (56), 49 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:34,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:34:34,885 INFO L93 Difference]: Finished difference Result 370 states and 515 transitions. [2021-05-06 11:34:34,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-06 11:34:34,886 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.12) internal successors, (56), 49 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2021-05-06 11:34:34,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:34:34,887 INFO L225 Difference]: With dead ends: 370 [2021-05-06 11:34:34,887 INFO L226 Difference]: Without dead ends: 353 [2021-05-06 11:34:34,887 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1127.5ms TimeCoverageRelationStatistics Valid=143, Invalid=2307, Unknown=0, NotChecked=0, Total=2450 [2021-05-06 11:34:34,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-05-06 11:34:34,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 71. [2021-05-06 11:34:34,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 64 states have internal predecessors, (66), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:34:34,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2021-05-06 11:34:34,913 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 60 [2021-05-06 11:34:34,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:34:34,913 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2021-05-06 11:34:34,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 1.12) internal successors, (56), 49 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:34,914 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2021-05-06 11:34:34,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 11:34:34,914 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:34:34,914 INFO L523 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:34:34,914 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-05-06 11:34:34,914 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:34:34,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:34:34,914 INFO L82 PathProgramCache]: Analyzing trace with hash -545411790, now seen corresponding path program 47 times [2021-05-06 11:34:34,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:34:34,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1947640900] [2021-05-06 11:34:34,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:34:34,923 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:34:34,924 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:34:34,924 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:34:34,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:34:36,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:34:36,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:34:36,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:34:36,011 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:34:36,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1947640900] [2021-05-06 11:34:36,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1947640900] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:34:36,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:34:36,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2021-05-06 11:34:36,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970793386] [2021-05-06 11:34:36,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-06 11:34:36,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:34:36,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-06 11:34:36,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2404, Unknown=0, NotChecked=0, Total=2550 [2021-05-06 11:34:36,012 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 51 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 50 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:41,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:34:41,593 INFO L93 Difference]: Finished difference Result 377 states and 525 transitions. [2021-05-06 11:34:41,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-06 11:34:41,594 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 50 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2021-05-06 11:34:41,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:34:41,595 INFO L225 Difference]: With dead ends: 377 [2021-05-06 11:34:41,595 INFO L226 Difference]: Without dead ends: 360 [2021-05-06 11:34:41,609 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1010.5ms TimeCoverageRelationStatistics Valid=146, Invalid=2404, Unknown=0, NotChecked=0, Total=2550 [2021-05-06 11:34:41,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-05-06 11:34:41,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 72. [2021-05-06 11:34:41,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 64 states have (on average 1.046875) internal successors, (67), 65 states have internal predecessors, (67), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:34:41,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2021-05-06 11:34:41,643 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 61 [2021-05-06 11:34:41,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:34:41,643 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2021-05-06 11:34:41,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 50 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:41,643 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2021-05-06 11:34:41,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-06 11:34:41,643 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:34:41,643 INFO L523 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:34:41,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-05-06 11:34:41,643 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:34:41,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:34:41,644 INFO L82 PathProgramCache]: Analyzing trace with hash 407383786, now seen corresponding path program 48 times [2021-05-06 11:34:41,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:34:41,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1432285254] [2021-05-06 11:34:41,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:34:41,646 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:34:41,646 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:34:41,646 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:34:41,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:34:42,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:34:42,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:34:42,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:34:42,794 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:34:42,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1432285254] [2021-05-06 11:34:42,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1432285254] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:34:42,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:34:42,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2021-05-06 11:34:42,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063562304] [2021-05-06 11:34:42,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-06 11:34:42,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:34:42,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-06 11:34:42,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2503, Unknown=0, NotChecked=0, Total=2652 [2021-05-06 11:34:42,795 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 51 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:48,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:34:48,660 INFO L93 Difference]: Finished difference Result 384 states and 535 transitions. [2021-05-06 11:34:48,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-06 11:34:48,661 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 51 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2021-05-06 11:34:48,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:34:48,662 INFO L225 Difference]: With dead ends: 384 [2021-05-06 11:34:48,662 INFO L226 Difference]: Without dead ends: 367 [2021-05-06 11:34:48,663 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1064.3ms TimeCoverageRelationStatistics Valid=149, Invalid=2503, Unknown=0, NotChecked=0, Total=2652 [2021-05-06 11:34:48,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-05-06 11:34:48,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 73. [2021-05-06 11:34:48,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 66 states have internal predecessors, (68), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:34:48,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2021-05-06 11:34:48,690 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 62 [2021-05-06 11:34:48,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:34:48,690 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2021-05-06 11:34:48,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 51 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:48,690 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2021-05-06 11:34:48,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-06 11:34:48,691 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:34:48,691 INFO L523 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:34:48,691 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-05-06 11:34:48,691 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:34:48,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:34:48,691 INFO L82 PathProgramCache]: Analyzing trace with hash -120724430, now seen corresponding path program 49 times [2021-05-06 11:34:48,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:34:48,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307213684] [2021-05-06 11:34:48,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:34:48,694 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:34:48,694 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:34:48,694 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:34:48,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:34:49,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:34:49,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:34:49,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:34:49,860 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:34:49,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307213684] [2021-05-06 11:34:49,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1307213684] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:34:49,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:34:49,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2021-05-06 11:34:49,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147747337] [2021-05-06 11:34:49,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-06 11:34:49,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:34:49,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-06 11:34:49,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=2604, Unknown=0, NotChecked=0, Total=2756 [2021-05-06 11:34:49,862 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:55,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:34:55,874 INFO L93 Difference]: Finished difference Result 391 states and 545 transitions. [2021-05-06 11:34:55,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-06 11:34:55,875 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2021-05-06 11:34:55,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:34:55,884 INFO L225 Difference]: With dead ends: 391 [2021-05-06 11:34:55,885 INFO L226 Difference]: Without dead ends: 374 [2021-05-06 11:34:55,885 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1086.3ms TimeCoverageRelationStatistics Valid=152, Invalid=2604, Unknown=0, NotChecked=0, Total=2756 [2021-05-06 11:34:55,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-05-06 11:34:55,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 74. [2021-05-06 11:34:55,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 67 states have internal predecessors, (69), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:34:55,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2021-05-06 11:34:55,927 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 63 [2021-05-06 11:34:55,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:34:55,927 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2021-05-06 11:34:55,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:55,928 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2021-05-06 11:34:55,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-06 11:34:55,929 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:34:55,929 INFO L523 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:34:55,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-05-06 11:34:55,929 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:34:55,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:34:55,929 INFO L82 PathProgramCache]: Analyzing trace with hash 687790058, now seen corresponding path program 50 times [2021-05-06 11:34:55,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:34:55,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335165007] [2021-05-06 11:34:55,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:34:55,932 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:34:55,932 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:34:55,933 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:34:56,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:34:57,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:34:57,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:34:57,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:34:57,222 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:34:57,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335165007] [2021-05-06 11:34:57,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [335165007] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:34:57,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:34:57,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2021-05-06 11:34:57,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71071019] [2021-05-06 11:34:57,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-06 11:34:57,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:34:57,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-06 11:34:57,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2707, Unknown=0, NotChecked=0, Total=2862 [2021-05-06 11:34:57,223 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand has 54 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 53 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:35:03,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:35:03,799 INFO L93 Difference]: Finished difference Result 398 states and 555 transitions. [2021-05-06 11:35:03,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-06 11:35:03,800 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 53 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2021-05-06 11:35:03,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:35:03,801 INFO L225 Difference]: With dead ends: 398 [2021-05-06 11:35:03,801 INFO L226 Difference]: Without dead ends: 381 [2021-05-06 11:35:03,802 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1142.1ms TimeCoverageRelationStatistics Valid=155, Invalid=2707, Unknown=0, NotChecked=0, Total=2862 [2021-05-06 11:35:03,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-05-06 11:35:03,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 75. [2021-05-06 11:35:03,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 67 states have (on average 1.044776119402985) internal successors, (70), 68 states have internal predecessors, (70), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:35:03,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2021-05-06 11:35:03,833 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 64 [2021-05-06 11:35:03,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:35:03,833 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2021-05-06 11:35:03,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 53 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:35:03,834 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2021-05-06 11:35:03,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-06 11:35:03,834 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:35:03,834 INFO L523 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:35:03,834 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-05-06 11:35:03,834 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:35:03,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:35:03,834 INFO L82 PathProgramCache]: Analyzing trace with hash -18064590, now seen corresponding path program 51 times [2021-05-06 11:35:03,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:35:03,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1747096983] [2021-05-06 11:35:03,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:35:03,837 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:35:03,837 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:35:03,837 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:35:03,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:35:05,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:35:05,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:35:05,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:35:05,268 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:35:05,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1747096983] [2021-05-06 11:35:05,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1747096983] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:35:05,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:35:05,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2021-05-06 11:35:05,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658768280] [2021-05-06 11:35:05,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-05-06 11:35:05,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:35:05,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-05-06 11:35:05,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2812, Unknown=0, NotChecked=0, Total=2970 [2021-05-06 11:35:05,269 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand has 55 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 54 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:35:12,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:35:12,889 INFO L93 Difference]: Finished difference Result 405 states and 565 transitions. [2021-05-06 11:35:12,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-06 11:35:12,890 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 54 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2021-05-06 11:35:12,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:35:12,891 INFO L225 Difference]: With dead ends: 405 [2021-05-06 11:35:12,891 INFO L226 Difference]: Without dead ends: 388 [2021-05-06 11:35:12,891 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1327.3ms TimeCoverageRelationStatistics Valid=158, Invalid=2812, Unknown=0, NotChecked=0, Total=2970 [2021-05-06 11:35:12,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-05-06 11:35:12,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 76. [2021-05-06 11:35:12,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 69 states have internal predecessors, (71), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:35:12,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2021-05-06 11:35:12,930 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 65 [2021-05-06 11:35:12,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:35:12,930 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2021-05-06 11:35:12,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 54 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:35:12,930 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2021-05-06 11:35:12,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-06 11:35:12,930 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:35:12,930 INFO L523 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:35:12,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-05-06 11:35:12,931 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:35:12,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:35:12,931 INFO L82 PathProgramCache]: Analyzing trace with hash -424722198, now seen corresponding path program 52 times [2021-05-06 11:35:12,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:35:12,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614176323] [2021-05-06 11:35:12,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:35:12,933 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:35:12,933 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:35:12,934 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:35:12,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:35:14,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:35:14,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:35:14,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:35:14,725 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:35:14,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614176323] [2021-05-06 11:35:14,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [614176323] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:35:14,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:35:14,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2021-05-06 11:35:14,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756108803] [2021-05-06 11:35:14,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-06 11:35:14,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:35:14,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-06 11:35:14,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2919, Unknown=0, NotChecked=0, Total=3080 [2021-05-06 11:35:14,726 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand has 56 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 55 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:35:22,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:35:22,315 INFO L93 Difference]: Finished difference Result 412 states and 575 transitions. [2021-05-06 11:35:22,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-06 11:35:22,316 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 55 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2021-05-06 11:35:22,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:35:22,317 INFO L225 Difference]: With dead ends: 412 [2021-05-06 11:35:22,317 INFO L226 Difference]: Without dead ends: 395 [2021-05-06 11:35:22,318 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1688.3ms TimeCoverageRelationStatistics Valid=161, Invalid=2919, Unknown=0, NotChecked=0, Total=3080 [2021-05-06 11:35:22,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-05-06 11:35:22,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 77. [2021-05-06 11:35:22,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 70 states have internal predecessors, (72), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:35:22,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2021-05-06 11:35:22,351 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 66 [2021-05-06 11:35:22,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:35:22,351 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2021-05-06 11:35:22,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 55 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:35:22,351 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2021-05-06 11:35:22,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-06 11:35:22,351 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:35:22,351 INFO L523 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:35:22,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-05-06 11:35:22,351 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:35:22,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:35:22,352 INFO L82 PathProgramCache]: Analyzing trace with hash -146206158, now seen corresponding path program 53 times [2021-05-06 11:35:22,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:35:22,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662065752] [2021-05-06 11:35:22,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:35:22,357 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:35:22,357 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:35:22,358 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:35:22,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:35:23,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:35:23,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:35:23,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:35:23,727 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:35:23,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662065752] [2021-05-06 11:35:23,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1662065752] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:35:23,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:35:23,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2021-05-06 11:35:23,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106783383] [2021-05-06 11:35:23,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-05-06 11:35:23,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:35:23,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-05-06 11:35:23,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=3028, Unknown=0, NotChecked=0, Total=3192 [2021-05-06 11:35:23,729 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand has 57 states, 57 states have (on average 1.105263157894737) internal successors, (63), 56 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:35:32,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:35:32,186 INFO L93 Difference]: Finished difference Result 419 states and 585 transitions. [2021-05-06 11:35:32,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-06 11:35:32,187 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.105263157894737) internal successors, (63), 56 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2021-05-06 11:35:32,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:35:32,188 INFO L225 Difference]: With dead ends: 419 [2021-05-06 11:35:32,188 INFO L226 Difference]: Without dead ends: 402 [2021-05-06 11:35:32,188 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1285.1ms TimeCoverageRelationStatistics Valid=164, Invalid=3028, Unknown=0, NotChecked=0, Total=3192 [2021-05-06 11:35:32,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-05-06 11:35:32,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 78. [2021-05-06 11:35:32,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 70 states have (on average 1.042857142857143) internal successors, (73), 71 states have internal predecessors, (73), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:35:32,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2021-05-06 11:35:32,234 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 67 [2021-05-06 11:35:32,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:35:32,234 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2021-05-06 11:35:32,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 1.105263157894737) internal successors, (63), 56 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:35:32,234 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2021-05-06 11:35:32,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 11:35:32,234 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:35:32,235 INFO L523 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:35:32,235 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-05-06 11:35:32,235 INFO L428 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:35:32,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:35:32,235 INFO L82 PathProgramCache]: Analyzing trace with hash -102143510, now seen corresponding path program 54 times [2021-05-06 11:35:32,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:35:32,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132539534] [2021-05-06 11:35:32,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:35:32,242 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:35:32,242 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:35:32,243 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:35:32,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:35:33,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:35:33,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:35:33,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:35:33,657 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:35:33,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132539534] [2021-05-06 11:35:33,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [132539534] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:35:33,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:35:33,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2021-05-06 11:35:33,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097036310] [2021-05-06 11:35:33,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-06 11:35:33,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:35:33,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-06 11:35:33,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=3139, Unknown=0, NotChecked=0, Total=3306 [2021-05-06 11:35:33,658 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 58 states, 58 states have (on average 1.103448275862069) internal successors, (64), 57 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:35:41,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:35:41,676 INFO L93 Difference]: Finished difference Result 426 states and 595 transitions. [2021-05-06 11:35:41,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-06 11:35:41,677 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.103448275862069) internal successors, (64), 57 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2021-05-06 11:35:41,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:35:41,678 INFO L225 Difference]: With dead ends: 426 [2021-05-06 11:35:41,678 INFO L226 Difference]: Without dead ends: 409 [2021-05-06 11:35:41,679 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1327.0ms TimeCoverageRelationStatistics Valid=167, Invalid=3139, Unknown=0, NotChecked=0, Total=3306 [2021-05-06 11:35:41,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-05-06 11:35:41,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 79. [2021-05-06 11:35:41,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 72 states have internal predecessors, (74), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:35:41,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2021-05-06 11:35:41,722 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 68 [2021-05-06 11:35:41,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:35:41,722 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2021-05-06 11:35:41,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 1.103448275862069) internal successors, (64), 57 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:35:41,722 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2021-05-06 11:35:41,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 11:35:41,723 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:35:41,723 INFO L523 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:35:41,723 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-05-06 11:35:41,723 INFO L428 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:35:41,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:35:41,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1263798578, now seen corresponding path program 55 times [2021-05-06 11:35:41,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:35:41,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2068731182] [2021-05-06 11:35:41,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:35:41,726 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:35:41,726 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:35:41,726 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:35:41,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:35:43,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:35:43,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:35:43,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:35:43,217 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:35:43,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2068731182] [2021-05-06 11:35:43,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2068731182] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:35:43,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:35:43,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2021-05-06 11:35:43,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191212714] [2021-05-06 11:35:43,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-05-06 11:35:43,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:35:43,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-05-06 11:35:43,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=3252, Unknown=0, NotChecked=0, Total=3422 [2021-05-06 11:35:43,218 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand has 59 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 58 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:35:51,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:35:51,764 INFO L93 Difference]: Finished difference Result 433 states and 605 transitions. [2021-05-06 11:35:51,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-06 11:35:51,764 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 58 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2021-05-06 11:35:51,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:35:51,766 INFO L225 Difference]: With dead ends: 433 [2021-05-06 11:35:51,766 INFO L226 Difference]: Without dead ends: 416 [2021-05-06 11:35:51,766 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1400.0ms TimeCoverageRelationStatistics Valid=170, Invalid=3252, Unknown=0, NotChecked=0, Total=3422 [2021-05-06 11:35:51,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-05-06 11:35:51,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 80. [2021-05-06 11:35:51,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 73 states have internal predecessors, (75), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:35:51,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2021-05-06 11:35:51,823 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 69 [2021-05-06 11:35:51,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:35:51,824 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2021-05-06 11:35:51,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 59 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 58 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:35:51,824 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2021-05-06 11:35:51,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-06 11:35:51,824 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:35:51,824 INFO L523 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:35:51,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-05-06 11:35:51,824 INFO L428 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:35:51,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:35:51,825 INFO L82 PathProgramCache]: Analyzing trace with hash 658330346, now seen corresponding path program 56 times [2021-05-06 11:35:51,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:35:51,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294601120] [2021-05-06 11:35:51,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:35:51,827 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:35:51,827 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:35:51,828 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:35:51,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:35:53,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:35:53,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:35:53,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:35:53,388 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:35:53,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294601120] [2021-05-06 11:35:53,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [294601120] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:35:53,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:35:53,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2021-05-06 11:35:53,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444564926] [2021-05-06 11:35:53,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-05-06 11:35:53,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:35:53,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-05-06 11:35:53,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=3367, Unknown=0, NotChecked=0, Total=3540 [2021-05-06 11:35:53,389 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand has 60 states, 60 states have (on average 1.1) internal successors, (66), 59 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:36:02,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:36:02,102 INFO L93 Difference]: Finished difference Result 440 states and 615 transitions. [2021-05-06 11:36:02,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-06 11:36:02,102 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.1) internal successors, (66), 59 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2021-05-06 11:36:02,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:36:02,104 INFO L225 Difference]: With dead ends: 440 [2021-05-06 11:36:02,104 INFO L226 Difference]: Without dead ends: 423 [2021-05-06 11:36:02,104 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1458.5ms TimeCoverageRelationStatistics Valid=173, Invalid=3367, Unknown=0, NotChecked=0, Total=3540 [2021-05-06 11:36:02,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-05-06 11:36:02,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 81. [2021-05-06 11:36:02,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 74 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:36:02,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2021-05-06 11:36:02,146 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 70 [2021-05-06 11:36:02,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:36:02,146 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2021-05-06 11:36:02,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 1.1) internal successors, (66), 59 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:36:02,147 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2021-05-06 11:36:02,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-06 11:36:02,147 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:36:02,147 INFO L523 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:36:02,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-05-06 11:36:02,147 INFO L428 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:36:02,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:36:02,147 INFO L82 PathProgramCache]: Analyzing trace with hash -931315662, now seen corresponding path program 57 times [2021-05-06 11:36:02,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:36:02,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538443945] [2021-05-06 11:36:02,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:36:02,150 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:36:02,150 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:36:02,150 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:36:02,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:36:03,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:36:03,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:36:03,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:36:03,729 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:36:03,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1538443945] [2021-05-06 11:36:03,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1538443945] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:36:03,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:36:03,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2021-05-06 11:36:03,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244738910] [2021-05-06 11:36:03,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-05-06 11:36:03,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:36:03,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-05-06 11:36:03,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=3484, Unknown=0, NotChecked=0, Total=3660 [2021-05-06 11:36:03,730 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand has 61 states, 61 states have (on average 1.098360655737705) internal successors, (67), 60 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:36:12,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:36:12,494 INFO L93 Difference]: Finished difference Result 447 states and 625 transitions. [2021-05-06 11:36:12,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-06 11:36:12,494 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.098360655737705) internal successors, (67), 60 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2021-05-06 11:36:12,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:36:12,496 INFO L225 Difference]: With dead ends: 447 [2021-05-06 11:36:12,496 INFO L226 Difference]: Without dead ends: 430 [2021-05-06 11:36:12,496 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1469.5ms TimeCoverageRelationStatistics Valid=176, Invalid=3484, Unknown=0, NotChecked=0, Total=3660 [2021-05-06 11:36:12,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-05-06 11:36:12,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 82. [2021-05-06 11:36:12,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 75 states have internal predecessors, (77), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:36:12,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2021-05-06 11:36:12,542 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 71 [2021-05-06 11:36:12,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:36:12,542 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2021-05-06 11:36:12,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 61 states, 61 states have (on average 1.098360655737705) internal successors, (67), 60 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:36:12,542 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2021-05-06 11:36:12,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-06 11:36:12,542 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:36:12,542 INFO L523 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:36:12,542 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-05-06 11:36:12,542 INFO L428 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:36:12,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:36:12,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1329265642, now seen corresponding path program 58 times [2021-05-06 11:36:12,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:36:12,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18327680] [2021-05-06 11:36:12,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:36:12,548 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:36:12,548 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:36:12,549 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:36:12,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:36:14,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:36:14,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:36:14,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:36:14,169 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:36:14,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18327680] [2021-05-06 11:36:14,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [18327680] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:36:14,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:36:14,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2021-05-06 11:36:14,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528341267] [2021-05-06 11:36:14,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-05-06 11:36:14,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:36:14,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-05-06 11:36:14,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=3603, Unknown=0, NotChecked=0, Total=3782 [2021-05-06 11:36:14,170 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand has 62 states, 62 states have (on average 1.096774193548387) internal successors, (68), 61 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:36:23,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:36:23,580 INFO L93 Difference]: Finished difference Result 454 states and 635 transitions. [2021-05-06 11:36:23,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-06 11:36:23,581 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.096774193548387) internal successors, (68), 61 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2021-05-06 11:36:23,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:36:23,582 INFO L225 Difference]: With dead ends: 454 [2021-05-06 11:36:23,582 INFO L226 Difference]: Without dead ends: 437 [2021-05-06 11:36:23,583 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1496.7ms TimeCoverageRelationStatistics Valid=179, Invalid=3603, Unknown=0, NotChecked=0, Total=3782 [2021-05-06 11:36:23,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-05-06 11:36:23,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 83. [2021-05-06 11:36:23,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 75 states have (on average 1.04) internal successors, (78), 76 states have internal predecessors, (78), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:36:23,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2021-05-06 11:36:23,632 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 72 [2021-05-06 11:36:23,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:36:23,632 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2021-05-06 11:36:23,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 62 states, 62 states have (on average 1.096774193548387) internal successors, (68), 61 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:36:23,633 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2021-05-06 11:36:23,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-06 11:36:23,633 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:36:23,633 INFO L523 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:36:23,633 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-05-06 11:36:23,633 INFO L428 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:36:23,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:36:23,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1607157966, now seen corresponding path program 59 times [2021-05-06 11:36:23,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:36:23,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [726698478] [2021-05-06 11:36:23,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:36:23,635 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:36:23,635 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:36:23,636 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:36:23,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:36:25,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:36:25,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:36:25,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:36:25,290 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:36:25,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [726698478] [2021-05-06 11:36:25,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [726698478] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:36:25,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:36:25,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2021-05-06 11:36:25,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054583044] [2021-05-06 11:36:25,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-05-06 11:36:25,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:36:25,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-05-06 11:36:25,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=3724, Unknown=0, NotChecked=0, Total=3906 [2021-05-06 11:36:25,291 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand has 63 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 62 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:36:34,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:36:34,938 INFO L93 Difference]: Finished difference Result 461 states and 645 transitions. [2021-05-06 11:36:34,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-06 11:36:34,939 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 62 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2021-05-06 11:36:34,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:36:34,940 INFO L225 Difference]: With dead ends: 461 [2021-05-06 11:36:34,940 INFO L226 Difference]: Without dead ends: 444 [2021-05-06 11:36:34,940 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1554.3ms TimeCoverageRelationStatistics Valid=182, Invalid=3724, Unknown=0, NotChecked=0, Total=3906 [2021-05-06 11:36:34,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-05-06 11:36:34,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 84. [2021-05-06 11:36:34,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 77 states have internal predecessors, (79), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:36:34,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2021-05-06 11:36:34,992 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 73 [2021-05-06 11:36:34,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:36:34,992 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2021-05-06 11:36:34,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 63 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 62 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:36:34,992 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2021-05-06 11:36:34,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-06 11:36:34,993 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:36:34,993 INFO L523 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:36:34,993 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-05-06 11:36:34,993 INFO L428 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:36:34,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:36:34,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1852990698, now seen corresponding path program 60 times [2021-05-06 11:36:34,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:36:34,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1166925185] [2021-05-06 11:36:34,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:36:34,996 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:36:34,996 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:36:34,996 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:36:35,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:36:36,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:36:36,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:36:36,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:36:36,692 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:36:36,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1166925185] [2021-05-06 11:36:36,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1166925185] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:36:36,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:36:36,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2021-05-06 11:36:36,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445268482] [2021-05-06 11:36:36,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-05-06 11:36:36,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:36:36,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-05-06 11:36:36,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=3847, Unknown=0, NotChecked=0, Total=4032 [2021-05-06 11:36:36,693 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand has 64 states, 64 states have (on average 1.09375) internal successors, (70), 63 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:36:46,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:36:46,913 INFO L93 Difference]: Finished difference Result 468 states and 655 transitions. [2021-05-06 11:36:46,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-06 11:36:46,913 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.09375) internal successors, (70), 63 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2021-05-06 11:36:46,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:36:46,915 INFO L225 Difference]: With dead ends: 468 [2021-05-06 11:36:46,915 INFO L226 Difference]: Without dead ends: 451 [2021-05-06 11:36:46,915 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1593.4ms TimeCoverageRelationStatistics Valid=185, Invalid=3847, Unknown=0, NotChecked=0, Total=4032 [2021-05-06 11:36:46,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-05-06 11:36:46,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 85. [2021-05-06 11:36:46,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 78 states have internal predecessors, (80), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:36:46,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2021-05-06 11:36:46,973 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 74 [2021-05-06 11:36:46,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:36:46,973 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2021-05-06 11:36:46,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 64 states, 64 states have (on average 1.09375) internal successors, (70), 63 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:36:46,974 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2021-05-06 11:36:46,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 11:36:46,974 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:36:46,974 INFO L523 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:36:46,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-05-06 11:36:46,974 INFO L428 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:36:46,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:36:46,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1743416882, now seen corresponding path program 61 times [2021-05-06 11:36:46,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:36:46,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167950187] [2021-05-06 11:36:46,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:36:46,976 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:36:46,977 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:36:46,977 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:36:47,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:36:48,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:36:48,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:36:48,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:36:48,721 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:36:48,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167950187] [2021-05-06 11:36:48,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1167950187] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:36:48,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:36:48,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2021-05-06 11:36:48,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311446653] [2021-05-06 11:36:48,721 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-05-06 11:36:48,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:36:48,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-05-06 11:36:48,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=3972, Unknown=0, NotChecked=0, Total=4160 [2021-05-06 11:36:48,722 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand has 65 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 64 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:36:59,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:36:59,294 INFO L93 Difference]: Finished difference Result 475 states and 665 transitions. [2021-05-06 11:36:59,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-06 11:36:59,295 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 64 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2021-05-06 11:36:59,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:36:59,296 INFO L225 Difference]: With dead ends: 475 [2021-05-06 11:36:59,296 INFO L226 Difference]: Without dead ends: 458 [2021-05-06 11:36:59,297 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1639.8ms TimeCoverageRelationStatistics Valid=188, Invalid=3972, Unknown=0, NotChecked=0, Total=4160 [2021-05-06 11:36:59,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-05-06 11:36:59,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 86. [2021-05-06 11:36:59,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 79 states have internal predecessors, (81), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:36:59,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2021-05-06 11:36:59,358 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 75 [2021-05-06 11:36:59,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:36:59,358 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2021-05-06 11:36:59,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 65 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 64 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:36:59,358 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2021-05-06 11:36:59,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-06 11:36:59,359 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:36:59,359 INFO L523 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:36:59,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-05-06 11:36:59,359 INFO L428 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:36:59,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:36:59,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1653371414, now seen corresponding path program 62 times [2021-05-06 11:36:59,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:36:59,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808697527] [2021-05-06 11:36:59,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:36:59,361 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:36:59,361 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:36:59,362 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:36:59,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:37:01,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:37:01,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:37:01,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:37:01,137 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:37:01,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808697527] [2021-05-06 11:37:01,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [808697527] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:37:01,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:37:01,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2021-05-06 11:37:01,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698441755] [2021-05-06 11:37:01,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-05-06 11:37:01,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:37:01,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-05-06 11:37:01,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=4099, Unknown=0, NotChecked=0, Total=4290 [2021-05-06 11:37:01,138 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand has 66 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 65 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:37:12,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:37:12,580 INFO L93 Difference]: Finished difference Result 482 states and 675 transitions. [2021-05-06 11:37:12,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-06 11:37:12,580 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 65 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2021-05-06 11:37:12,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:37:12,582 INFO L225 Difference]: With dead ends: 482 [2021-05-06 11:37:12,582 INFO L226 Difference]: Without dead ends: 465 [2021-05-06 11:37:12,582 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1656.5ms TimeCoverageRelationStatistics Valid=191, Invalid=4099, Unknown=0, NotChecked=0, Total=4290 [2021-05-06 11:37:12,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-05-06 11:37:12,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 87. [2021-05-06 11:37:12,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 79 states have (on average 1.0379746835443038) internal successors, (82), 80 states have internal predecessors, (82), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:37:12,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2021-05-06 11:37:12,643 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 76 [2021-05-06 11:37:12,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:37:12,644 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2021-05-06 11:37:12,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 65 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:37:12,644 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2021-05-06 11:37:12,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-06 11:37:12,644 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:37:12,644 INFO L523 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:37:12,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-05-06 11:37:12,644 INFO L428 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:37:12,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:37:12,644 INFO L82 PathProgramCache]: Analyzing trace with hash 420373810, now seen corresponding path program 63 times [2021-05-06 11:37:12,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:37:12,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075959240] [2021-05-06 11:37:12,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:37:12,647 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:37:12,647 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:37:12,647 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:37:12,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:37:14,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:37:14,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:37:14,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:37:14,475 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:37:14,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075959240] [2021-05-06 11:37:14,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2075959240] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:37:14,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:37:14,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2021-05-06 11:37:14,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659712228] [2021-05-06 11:37:14,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-05-06 11:37:14,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:37:14,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-05-06 11:37:14,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=4228, Unknown=0, NotChecked=0, Total=4422 [2021-05-06 11:37:14,476 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand has 67 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 66 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:37:26,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:37:26,113 INFO L93 Difference]: Finished difference Result 489 states and 685 transitions. [2021-05-06 11:37:26,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-06 11:37:26,113 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 66 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2021-05-06 11:37:26,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:37:26,115 INFO L225 Difference]: With dead ends: 489 [2021-05-06 11:37:26,115 INFO L226 Difference]: Without dead ends: 472 [2021-05-06 11:37:26,115 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1713.9ms TimeCoverageRelationStatistics Valid=194, Invalid=4228, Unknown=0, NotChecked=0, Total=4422 [2021-05-06 11:37:26,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-05-06 11:37:26,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 88. [2021-05-06 11:37:26,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 80 states have (on average 1.0375) internal successors, (83), 81 states have internal predecessors, (83), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:37:26,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2021-05-06 11:37:26,186 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 77 [2021-05-06 11:37:26,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:37:26,186 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2021-05-06 11:37:26,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 67 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 66 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:37:26,186 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2021-05-06 11:37:26,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-06 11:37:26,187 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:37:26,187 INFO L523 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:37:26,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-05-06 11:37:26,187 INFO L428 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:37:26,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:37:26,187 INFO L82 PathProgramCache]: Analyzing trace with hash 281966314, now seen corresponding path program 64 times [2021-05-06 11:37:26,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:37:26,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303264799] [2021-05-06 11:37:26,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:37:26,189 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:37:26,189 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:37:26,190 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:37:26,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:37:28,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:37:28,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:37:28,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:37:28,087 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:37:28,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303264799] [2021-05-06 11:37:28,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [303264799] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:37:28,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:37:28,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2021-05-06 11:37:28,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508219534] [2021-05-06 11:37:28,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-05-06 11:37:28,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:37:28,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-05-06 11:37:28,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=4359, Unknown=0, NotChecked=0, Total=4556 [2021-05-06 11:37:28,088 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand has 68 states, 68 states have (on average 1.088235294117647) internal successors, (74), 67 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:37:40,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:37:40,364 INFO L93 Difference]: Finished difference Result 496 states and 695 transitions. [2021-05-06 11:37:40,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-06 11:37:40,365 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.088235294117647) internal successors, (74), 67 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2021-05-06 11:37:40,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:37:40,366 INFO L225 Difference]: With dead ends: 496 [2021-05-06 11:37:40,366 INFO L226 Difference]: Without dead ends: 479 [2021-05-06 11:37:40,367 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1771.7ms TimeCoverageRelationStatistics Valid=197, Invalid=4359, Unknown=0, NotChecked=0, Total=4556 [2021-05-06 11:37:40,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-05-06 11:37:40,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 89. [2021-05-06 11:37:40,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 81 states have (on average 1.037037037037037) internal successors, (84), 82 states have internal predecessors, (84), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:37:40,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2021-05-06 11:37:40,438 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 78 [2021-05-06 11:37:40,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:37:40,438 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2021-05-06 11:37:40,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 68 states, 68 states have (on average 1.088235294117647) internal successors, (74), 67 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:37:40,438 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2021-05-06 11:37:40,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 11:37:40,438 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:37:40,438 INFO L523 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:37:40,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-05-06 11:37:40,439 INFO L428 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:37:40,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:37:40,439 INFO L82 PathProgramCache]: Analyzing trace with hash 286301234, now seen corresponding path program 65 times [2021-05-06 11:37:40,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:37:40,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549218657] [2021-05-06 11:37:40,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:37:40,441 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:37:40,441 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:37:40,442 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:37:40,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:37:42,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:37:42,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:37:42,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:37:42,402 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:37:42,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549218657] [2021-05-06 11:37:42,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [549218657] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:37:42,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:37:42,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2021-05-06 11:37:42,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530697612] [2021-05-06 11:37:42,403 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-05-06 11:37:42,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:37:42,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-05-06 11:37:42,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=4492, Unknown=0, NotChecked=0, Total=4692 [2021-05-06 11:37:42,403 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 68 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:37:55,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:37:55,169 INFO L93 Difference]: Finished difference Result 503 states and 705 transitions. [2021-05-06 11:37:55,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-06 11:37:55,169 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 68 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2021-05-06 11:37:55,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:37:55,171 INFO L225 Difference]: With dead ends: 503 [2021-05-06 11:37:55,171 INFO L226 Difference]: Without dead ends: 486 [2021-05-06 11:37:55,172 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1835.7ms TimeCoverageRelationStatistics Valid=200, Invalid=4492, Unknown=0, NotChecked=0, Total=4692 [2021-05-06 11:37:55,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-05-06 11:37:55,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 90. [2021-05-06 11:37:55,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 83 states have internal predecessors, (85), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:37:55,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2021-05-06 11:37:55,246 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 79 [2021-05-06 11:37:55,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:37:55,246 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2021-05-06 11:37:55,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 68 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:37:55,246 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2021-05-06 11:37:55,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 11:37:55,247 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:37:55,247 INFO L523 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:37:55,247 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-05-06 11:37:55,247 INFO L428 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:37:55,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:37:55,247 INFO L82 PathProgramCache]: Analyzing trace with hash 420683754, now seen corresponding path program 66 times [2021-05-06 11:37:55,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:37:55,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1489183320] [2021-05-06 11:37:55,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:37:55,269 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:37:55,269 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:37:55,270 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:37:55,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:37:57,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:37:57,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:37:57,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:37:57,559 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:37:57,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1489183320] [2021-05-06 11:37:57,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1489183320] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:37:57,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:37:57,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2021-05-06 11:37:57,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770905370] [2021-05-06 11:37:57,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-05-06 11:37:57,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:37:57,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-05-06 11:37:57,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=4627, Unknown=0, NotChecked=0, Total=4830 [2021-05-06 11:37:57,560 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand has 70 states, 70 states have (on average 1.0857142857142856) internal successors, (76), 69 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:38:11,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:38:11,000 INFO L93 Difference]: Finished difference Result 510 states and 715 transitions. [2021-05-06 11:38:11,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-06 11:38:11,001 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.0857142857142856) internal successors, (76), 69 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2021-05-06 11:38:11,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:38:11,002 INFO L225 Difference]: With dead ends: 510 [2021-05-06 11:38:11,002 INFO L226 Difference]: Without dead ends: 493 [2021-05-06 11:38:11,003 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2125.1ms TimeCoverageRelationStatistics Valid=203, Invalid=4627, Unknown=0, NotChecked=0, Total=4830 [2021-05-06 11:38:11,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-05-06 11:38:11,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 91. [2021-05-06 11:38:11,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 83 states have (on average 1.036144578313253) internal successors, (86), 84 states have internal predecessors, (86), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:38:11,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2021-05-06 11:38:11,077 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 80 [2021-05-06 11:38:11,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:38:11,077 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2021-05-06 11:38:11,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 1.0857142857142856) internal successors, (76), 69 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:38:11,077 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2021-05-06 11:38:11,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-06 11:38:11,077 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:38:11,078 INFO L523 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:38:11,078 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-05-06 11:38:11,078 INFO L428 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:38:11,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:38:11,078 INFO L82 PathProgramCache]: Analyzing trace with hash 291574578, now seen corresponding path program 67 times [2021-05-06 11:38:11,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:38:11,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [522618955] [2021-05-06 11:38:11,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:38:11,080 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:38:11,080 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:38:11,081 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:38:11,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:38:13,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:38:13,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:38:13,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:38:13,133 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:38:13,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [522618955] [2021-05-06 11:38:13,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [522618955] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:38:13,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:38:13,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2021-05-06 11:38:13,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012204000] [2021-05-06 11:38:13,133 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-05-06 11:38:13,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:38:13,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-05-06 11:38:13,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=4764, Unknown=0, NotChecked=0, Total=4970 [2021-05-06 11:38:13,134 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand has 71 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 70 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:38:27,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:38:27,074 INFO L93 Difference]: Finished difference Result 517 states and 725 transitions. [2021-05-06 11:38:27,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-06 11:38:27,074 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 70 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2021-05-06 11:38:27,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:38:27,076 INFO L225 Difference]: With dead ends: 517 [2021-05-06 11:38:27,076 INFO L226 Difference]: Without dead ends: 500 [2021-05-06 11:38:27,077 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1920.4ms TimeCoverageRelationStatistics Valid=206, Invalid=4764, Unknown=0, NotChecked=0, Total=4970 [2021-05-06 11:38:27,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-05-06 11:38:27,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 92. [2021-05-06 11:38:27,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 85 states have internal predecessors, (87), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:38:27,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2021-05-06 11:38:27,166 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 81 [2021-05-06 11:38:27,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:38:27,166 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2021-05-06 11:38:27,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 71 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 70 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:38:27,166 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2021-05-06 11:38:27,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-06 11:38:27,166 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:38:27,167 INFO L523 BasicCegarLoop]: trace histogram [68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:38:27,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-05-06 11:38:27,167 INFO L428 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:38:27,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:38:27,167 INFO L82 PathProgramCache]: Analyzing trace with hash 584157418, now seen corresponding path program 68 times [2021-05-06 11:38:27,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:38:27,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638760906] [2021-05-06 11:38:27,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:38:27,169 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:38:27,169 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:38:27,170 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:38:27,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:38:29,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:38:29,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:38:29,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:38:29,439 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:38:29,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1638760906] [2021-05-06 11:38:29,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1638760906] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:38:29,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:38:29,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2021-05-06 11:38:29,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806890243] [2021-05-06 11:38:29,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-05-06 11:38:29,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:38:29,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-05-06 11:38:29,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=4903, Unknown=0, NotChecked=0, Total=5112 [2021-05-06 11:38:29,440 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand has 72 states, 72 states have (on average 1.0833333333333333) internal successors, (78), 71 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:38:44,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:38:44,196 INFO L93 Difference]: Finished difference Result 524 states and 735 transitions. [2021-05-06 11:38:44,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-06 11:38:44,196 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.0833333333333333) internal successors, (78), 71 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2021-05-06 11:38:44,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:38:44,198 INFO L225 Difference]: With dead ends: 524 [2021-05-06 11:38:44,198 INFO L226 Difference]: Without dead ends: 507 [2021-05-06 11:38:44,198 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2114.5ms TimeCoverageRelationStatistics Valid=209, Invalid=4903, Unknown=0, NotChecked=0, Total=5112 [2021-05-06 11:38:44,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-05-06 11:38:44,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 93. [2021-05-06 11:38:44,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 85 states have (on average 1.035294117647059) internal successors, (88), 86 states have internal predecessors, (88), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:38:44,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2021-05-06 11:38:44,293 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 82 [2021-05-06 11:38:44,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:38:44,293 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2021-05-06 11:38:44,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 72 states, 72 states have (on average 1.0833333333333333) internal successors, (78), 71 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:38:44,293 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2021-05-06 11:38:44,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-05-06 11:38:44,293 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:38:44,293 INFO L523 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:38:44,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-05-06 11:38:44,293 INFO L428 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:38:44,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:38:44,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1064290866, now seen corresponding path program 69 times [2021-05-06 11:38:44,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:38:44,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [529959433] [2021-05-06 11:38:44,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:38:44,296 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:38:44,296 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:38:44,297 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:38:44,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:38:46,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:38:46,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:38:46,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:38:46,677 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:38:46,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [529959433] [2021-05-06 11:38:46,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [529959433] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:38:46,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:38:46,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2021-05-06 11:38:46,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814955404] [2021-05-06 11:38:46,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2021-05-06 11:38:46,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:38:46,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-05-06 11:38:46,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=5044, Unknown=0, NotChecked=0, Total=5256 [2021-05-06 11:38:46,678 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand has 73 states, 73 states have (on average 1.082191780821918) internal successors, (79), 72 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:39:02,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:39:02,028 INFO L93 Difference]: Finished difference Result 531 states and 745 transitions. [2021-05-06 11:39:02,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-06 11:39:02,029 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.082191780821918) internal successors, (79), 72 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2021-05-06 11:39:02,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:39:02,030 INFO L225 Difference]: With dead ends: 531 [2021-05-06 11:39:02,030 INFO L226 Difference]: Without dead ends: 514 [2021-05-06 11:39:02,031 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2253.8ms TimeCoverageRelationStatistics Valid=212, Invalid=5044, Unknown=0, NotChecked=0, Total=5256 [2021-05-06 11:39:02,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-05-06 11:39:02,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 94. [2021-05-06 11:39:02,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 87 states have internal predecessors, (89), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:39:02,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2021-05-06 11:39:02,221 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 83 [2021-05-06 11:39:02,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:39:02,221 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2021-05-06 11:39:02,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 73 states, 73 states have (on average 1.082191780821918) internal successors, (79), 72 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:39:02,222 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2021-05-06 11:39:02,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-06 11:39:02,222 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:39:02,222 INFO L523 BasicCegarLoop]: trace histogram [70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:39:02,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-05-06 11:39:02,223 INFO L428 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:39:02,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:39:02,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1231441430, now seen corresponding path program 70 times [2021-05-06 11:39:02,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:39:02,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [910783496] [2021-05-06 11:39:02,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:39:02,225 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:39:02,225 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:39:02,226 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:39:02,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:39:04,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:39:04,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:39:04,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:39:04,935 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:39:04,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [910783496] [2021-05-06 11:39:04,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [910783496] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:39:04,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:39:04,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2021-05-06 11:39:04,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822128436] [2021-05-06 11:39:04,935 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-05-06 11:39:04,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:39:04,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-05-06 11:39:04,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=5187, Unknown=0, NotChecked=0, Total=5402 [2021-05-06 11:39:04,936 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand has 74 states, 74 states have (on average 1.0810810810810811) internal successors, (80), 73 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:39:21,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:39:21,341 INFO L93 Difference]: Finished difference Result 538 states and 755 transitions. [2021-05-06 11:39:21,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-06 11:39:21,342 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.0810810810810811) internal successors, (80), 73 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2021-05-06 11:39:21,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:39:21,343 INFO L225 Difference]: With dead ends: 538 [2021-05-06 11:39:21,343 INFO L226 Difference]: Without dead ends: 521 [2021-05-06 11:39:21,344 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2535.6ms TimeCoverageRelationStatistics Valid=215, Invalid=5187, Unknown=0, NotChecked=0, Total=5402 [2021-05-06 11:39:21,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-05-06 11:39:21,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 95. [2021-05-06 11:39:21,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 87 states have (on average 1.0344827586206897) internal successors, (90), 88 states have internal predecessors, (90), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:39:21,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2021-05-06 11:39:21,438 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 84 [2021-05-06 11:39:21,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:39:21,438 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2021-05-06 11:39:21,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 74 states, 74 states have (on average 1.0810810810810811) internal successors, (80), 73 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:39:21,438 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2021-05-06 11:39:21,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 11:39:21,438 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:39:21,438 INFO L523 BasicCegarLoop]: trace histogram [71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:39:21,439 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-05-06 11:39:21,439 INFO L428 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:39:21,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:39:21,439 INFO L82 PathProgramCache]: Analyzing trace with hash 615301426, now seen corresponding path program 71 times [2021-05-06 11:39:21,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:39:21,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1826425561] [2021-05-06 11:39:21,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:39:21,444 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:39:21,444 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:39:21,445 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:39:21,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:39:23,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:39:23,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:39:23,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:39:23,762 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:39:23,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1826425561] [2021-05-06 11:39:23,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1826425561] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:39:23,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:39:23,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2021-05-06 11:39:23,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581854440] [2021-05-06 11:39:23,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-05-06 11:39:23,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:39:23,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-05-06 11:39:23,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=5332, Unknown=0, NotChecked=0, Total=5550 [2021-05-06 11:39:23,764 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand has 75 states, 75 states have (on average 1.08) internal successors, (81), 74 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:39:40,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:39:40,297 INFO L93 Difference]: Finished difference Result 545 states and 765 transitions. [2021-05-06 11:39:40,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-06 11:39:40,298 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.08) internal successors, (81), 74 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2021-05-06 11:39:40,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:39:40,299 INFO L225 Difference]: With dead ends: 545 [2021-05-06 11:39:40,299 INFO L226 Difference]: Without dead ends: 528 [2021-05-06 11:39:40,300 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2187.5ms TimeCoverageRelationStatistics Valid=218, Invalid=5332, Unknown=0, NotChecked=0, Total=5550 [2021-05-06 11:39:40,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-05-06 11:39:40,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 96. [2021-05-06 11:39:40,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 88 states have (on average 1.0340909090909092) internal successors, (91), 89 states have internal predecessors, (91), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:39:40,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2021-05-06 11:39:40,403 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 85 [2021-05-06 11:39:40,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:39:40,403 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2021-05-06 11:39:40,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 75 states, 75 states have (on average 1.08) internal successors, (81), 74 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:39:40,403 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2021-05-06 11:39:40,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 11:39:40,404 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:39:40,404 INFO L523 BasicCegarLoop]: trace histogram [72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:39:40,404 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-05-06 11:39:40,404 INFO L428 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:39:40,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:39:40,404 INFO L82 PathProgramCache]: Analyzing trace with hash 2029755114, now seen corresponding path program 72 times [2021-05-06 11:39:40,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:39:40,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [314923454] [2021-05-06 11:39:40,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:39:40,406 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:39:40,406 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:39:40,407 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:39:40,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:39:42,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:39:42,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:39:42,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:39:42,780 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:39:42,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [314923454] [2021-05-06 11:39:42,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [314923454] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:39:42,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:39:42,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2021-05-06 11:39:42,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463067533] [2021-05-06 11:39:42,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-05-06 11:39:42,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:39:42,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-05-06 11:39:42,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=5479, Unknown=0, NotChecked=0, Total=5700 [2021-05-06 11:39:42,781 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand has 76 states, 76 states have (on average 1.0789473684210527) internal successors, (82), 75 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:40:00,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:40:00,422 INFO L93 Difference]: Finished difference Result 552 states and 775 transitions. [2021-05-06 11:40:00,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-06 11:40:00,422 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.0789473684210527) internal successors, (82), 75 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2021-05-06 11:40:00,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:40:00,424 INFO L225 Difference]: With dead ends: 552 [2021-05-06 11:40:00,424 INFO L226 Difference]: Without dead ends: 535 [2021-05-06 11:40:00,424 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2244.9ms TimeCoverageRelationStatistics Valid=221, Invalid=5479, Unknown=0, NotChecked=0, Total=5700 [2021-05-06 11:40:00,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-05-06 11:40:00,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 97. [2021-05-06 11:40:00,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 90 states have internal predecessors, (92), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:40:00,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2021-05-06 11:40:00,530 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 86 [2021-05-06 11:40:00,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:40:00,530 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2021-05-06 11:40:00,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 76 states, 76 states have (on average 1.0789473684210527) internal successors, (82), 75 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:40:00,530 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2021-05-06 11:40:00,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 11:40:00,531 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:40:00,531 INFO L523 BasicCegarLoop]: trace histogram [73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:40:00,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-05-06 11:40:00,531 INFO L428 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:40:00,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:40:00,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1366820814, now seen corresponding path program 73 times [2021-05-06 11:40:00,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:40:00,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [296344909] [2021-05-06 11:40:00,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:40:00,534 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:40:00,534 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:40:00,535 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:40:00,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:40:03,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:40:03,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:40:03,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:40:03,058 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:40:03,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [296344909] [2021-05-06 11:40:03,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [296344909] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:40:03,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:40:03,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2021-05-06 11:40:03,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578743085] [2021-05-06 11:40:03,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 77 states [2021-05-06 11:40:03,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:40:03,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-05-06 11:40:03,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=5628, Unknown=0, NotChecked=0, Total=5852 [2021-05-06 11:40:03,059 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand has 77 states, 77 states have (on average 1.077922077922078) internal successors, (83), 76 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:40:22,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:40:22,759 INFO L93 Difference]: Finished difference Result 559 states and 785 transitions. [2021-05-06 11:40:22,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-05-06 11:40:22,759 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.077922077922078) internal successors, (83), 76 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2021-05-06 11:40:22,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:40:22,761 INFO L225 Difference]: With dead ends: 559 [2021-05-06 11:40:22,761 INFO L226 Difference]: Without dead ends: 542 [2021-05-06 11:40:22,761 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2374.8ms TimeCoverageRelationStatistics Valid=224, Invalid=5628, Unknown=0, NotChecked=0, Total=5852 [2021-05-06 11:40:22,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-05-06 11:40:22,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 98. [2021-05-06 11:40:22,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 90 states have (on average 1.0333333333333334) internal successors, (93), 91 states have internal predecessors, (93), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:40:22,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2021-05-06 11:40:22,875 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 87 [2021-05-06 11:40:22,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:40:22,875 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2021-05-06 11:40:22,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 77 states, 77 states have (on average 1.077922077922078) internal successors, (83), 76 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:40:22,875 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2021-05-06 11:40:22,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-05-06 11:40:22,876 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:40:22,876 INFO L523 BasicCegarLoop]: trace histogram [74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:40:22,876 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-05-06 11:40:22,876 INFO L428 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:40:22,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:40:22,876 INFO L82 PathProgramCache]: Analyzing trace with hash 713507818, now seen corresponding path program 74 times [2021-05-06 11:40:22,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:40:22,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1672694071] [2021-05-06 11:40:22,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:40:22,880 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:40:22,881 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:40:22,881 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:40:22,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:40:25,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:40:25,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:40:25,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:40:25,508 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:40:25,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1672694071] [2021-05-06 11:40:25,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1672694071] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:40:25,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:40:25,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2021-05-06 11:40:25,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649413473] [2021-05-06 11:40:25,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-05-06 11:40:25,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:40:25,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-05-06 11:40:25,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=5779, Unknown=0, NotChecked=0, Total=6006 [2021-05-06 11:40:25,509 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand has 78 states, 78 states have (on average 1.0769230769230769) internal successors, (84), 77 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:40:45,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:40:45,138 INFO L93 Difference]: Finished difference Result 566 states and 795 transitions. [2021-05-06 11:40:45,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-06 11:40:45,138 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.0769230769230769) internal successors, (84), 77 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2021-05-06 11:40:45,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:40:45,140 INFO L225 Difference]: With dead ends: 566 [2021-05-06 11:40:45,140 INFO L226 Difference]: Without dead ends: 549 [2021-05-06 11:40:45,140 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2494.6ms TimeCoverageRelationStatistics Valid=227, Invalid=5779, Unknown=0, NotChecked=0, Total=6006 [2021-05-06 11:40:45,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-05-06 11:40:45,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 99. [2021-05-06 11:40:45,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 91 states have (on average 1.032967032967033) internal successors, (94), 92 states have internal predecessors, (94), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:40:45,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2021-05-06 11:40:45,270 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 88 [2021-05-06 11:40:45,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:40:45,270 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2021-05-06 11:40:45,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 78 states, 78 states have (on average 1.0769230769230769) internal successors, (84), 77 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:40:45,270 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2021-05-06 11:40:45,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 11:40:45,271 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:40:45,271 INFO L523 BasicCegarLoop]: trace histogram [75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:40:45,271 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-05-06 11:40:45,271 INFO L428 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:40:45,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:40:45,271 INFO L82 PathProgramCache]: Analyzing trace with hash 779185970, now seen corresponding path program 75 times [2021-05-06 11:40:45,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:40:45,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811204333] [2021-05-06 11:40:45,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:40:45,273 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:40:45,273 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:40:45,274 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:40:45,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:40:47,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:40:47,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:40:47,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:40:47,911 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:40:47,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811204333] [2021-05-06 11:40:47,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [811204333] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:40:47,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:40:47,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2021-05-06 11:40:47,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923046175] [2021-05-06 11:40:47,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2021-05-06 11:40:47,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:40:47,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-05-06 11:40:47,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=5932, Unknown=0, NotChecked=0, Total=6162 [2021-05-06 11:40:47,912 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand has 79 states, 79 states have (on average 1.0759493670886076) internal successors, (85), 78 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:41:07,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:41:07,724 INFO L93 Difference]: Finished difference Result 573 states and 805 transitions. [2021-05-06 11:41:07,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-05-06 11:41:07,724 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.0759493670886076) internal successors, (85), 78 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2021-05-06 11:41:07,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:41:07,726 INFO L225 Difference]: With dead ends: 573 [2021-05-06 11:41:07,726 INFO L226 Difference]: Without dead ends: 556 [2021-05-06 11:41:07,727 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2486.3ms TimeCoverageRelationStatistics Valid=230, Invalid=5932, Unknown=0, NotChecked=0, Total=6162 [2021-05-06 11:41:07,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-05-06 11:41:07,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 100. [2021-05-06 11:41:07,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 93 states have internal predecessors, (95), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:41:07,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2021-05-06 11:41:07,848 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 89 [2021-05-06 11:41:07,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:41:07,848 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2021-05-06 11:41:07,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 79 states, 79 states have (on average 1.0759493670886076) internal successors, (85), 78 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:41:07,848 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2021-05-06 11:41:07,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-06 11:41:07,849 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:41:07,849 INFO L523 BasicCegarLoop]: trace histogram [76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:41:07,849 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-05-06 11:41:07,849 INFO L428 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:41:07,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:41:07,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1479758614, now seen corresponding path program 76 times [2021-05-06 11:41:07,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:41:07,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200835678] [2021-05-06 11:41:07,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:41:07,857 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:41:07,857 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:41:07,858 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:41:07,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:41:10,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:41:10,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:41:10,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:41:10,414 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:41:10,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200835678] [2021-05-06 11:41:10,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1200835678] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:41:10,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:41:10,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2021-05-06 11:41:10,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659691265] [2021-05-06 11:41:10,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2021-05-06 11:41:10,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:41:10,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-05-06 11:41:10,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=6087, Unknown=0, NotChecked=0, Total=6320 [2021-05-06 11:41:10,415 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand has 80 states, 80 states have (on average 1.075) internal successors, (86), 79 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:41:30,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:41:30,765 INFO L93 Difference]: Finished difference Result 580 states and 815 transitions. [2021-05-06 11:41:30,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-06 11:41:30,765 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.075) internal successors, (86), 79 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2021-05-06 11:41:30,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:41:30,767 INFO L225 Difference]: With dead ends: 580 [2021-05-06 11:41:30,767 INFO L226 Difference]: Without dead ends: 563 [2021-05-06 11:41:30,767 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2428.0ms TimeCoverageRelationStatistics Valid=233, Invalid=6087, Unknown=0, NotChecked=0, Total=6320 [2021-05-06 11:41:30,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-05-06 11:41:30,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 101. [2021-05-06 11:41:30,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 93 states have (on average 1.032258064516129) internal successors, (96), 94 states have internal predecessors, (96), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:41:30,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2021-05-06 11:41:30,896 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 90 [2021-05-06 11:41:30,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:41:30,897 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2021-05-06 11:41:30,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 80 states, 80 states have (on average 1.075) internal successors, (86), 79 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:41:30,897 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2021-05-06 11:41:30,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-06 11:41:30,897 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:41:30,897 INFO L523 BasicCegarLoop]: trace histogram [77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:41:30,897 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-05-06 11:41:30,897 INFO L428 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:41:30,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:41:30,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1507403314, now seen corresponding path program 77 times [2021-05-06 11:41:30,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:41:30,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [872809190] [2021-05-06 11:41:30,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:41:30,900 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:41:30,900 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:41:30,900 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:41:30,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:41:33,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:41:33,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:41:33,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:41:33,510 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:41:33,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [872809190] [2021-05-06 11:41:33,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [872809190] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:41:33,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:41:33,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2021-05-06 11:41:33,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333674792] [2021-05-06 11:41:33,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2021-05-06 11:41:33,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:41:33,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-05-06 11:41:33,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=6244, Unknown=0, NotChecked=0, Total=6480 [2021-05-06 11:41:33,511 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand has 81 states, 81 states have (on average 1.0740740740740742) internal successors, (87), 80 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:41:55,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:41:55,209 INFO L93 Difference]: Finished difference Result 587 states and 825 transitions. [2021-05-06 11:41:55,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-05-06 11:41:55,209 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.0740740740740742) internal successors, (87), 80 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2021-05-06 11:41:55,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:41:55,214 INFO L225 Difference]: With dead ends: 587 [2021-05-06 11:41:55,214 INFO L226 Difference]: Without dead ends: 570 [2021-05-06 11:41:55,215 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2473.6ms TimeCoverageRelationStatistics Valid=236, Invalid=6244, Unknown=0, NotChecked=0, Total=6480 [2021-05-06 11:41:55,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-05-06 11:41:55,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 102. [2021-05-06 11:41:55,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 94 states have (on average 1.0319148936170213) internal successors, (97), 95 states have internal predecessors, (97), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:41:55,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2021-05-06 11:41:55,353 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 91 [2021-05-06 11:41:55,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:41:55,353 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2021-05-06 11:41:55,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 81 states, 81 states have (on average 1.0740740740740742) internal successors, (87), 80 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:41:55,353 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2021-05-06 11:41:55,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 11:41:55,353 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:41:55,354 INFO L523 BasicCegarLoop]: trace histogram [78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:41:55,354 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-05-06 11:41:55,354 INFO L428 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:41:55,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:41:55,354 INFO L82 PathProgramCache]: Analyzing trace with hash -379857430, now seen corresponding path program 78 times [2021-05-06 11:41:55,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:41:55,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2095752398] [2021-05-06 11:41:55,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:41:55,356 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:41:55,356 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:41:55,357 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:41:55,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:41:58,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:41:58,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:41:58,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:41:58,025 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:41:58,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2095752398] [2021-05-06 11:41:58,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2095752398] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:41:58,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:41:58,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2021-05-06 11:41:58,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001627278] [2021-05-06 11:41:58,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-05-06 11:41:58,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:41:58,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-05-06 11:41:58,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=6403, Unknown=0, NotChecked=0, Total=6642 [2021-05-06 11:41:58,026 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand has 82 states, 82 states have (on average 1.0731707317073171) internal successors, (88), 81 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:42:19,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:42:19,908 INFO L93 Difference]: Finished difference Result 594 states and 835 transitions. [2021-05-06 11:42:19,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-06 11:42:19,909 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.0731707317073171) internal successors, (88), 81 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2021-05-06 11:42:19,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:42:19,910 INFO L225 Difference]: With dead ends: 594 [2021-05-06 11:42:19,910 INFO L226 Difference]: Without dead ends: 577 [2021-05-06 11:42:19,911 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2507.5ms TimeCoverageRelationStatistics Valid=239, Invalid=6403, Unknown=0, NotChecked=0, Total=6642 [2021-05-06 11:42:19,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-05-06 11:42:20,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 103. [2021-05-06 11:42:20,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 95 states have (on average 1.0315789473684212) internal successors, (98), 96 states have internal predecessors, (98), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:42:20,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2021-05-06 11:42:20,051 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 92 [2021-05-06 11:42:20,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:42:20,051 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2021-05-06 11:42:20,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 82 states, 82 states have (on average 1.0731707317073171) internal successors, (88), 81 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:42:20,052 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2021-05-06 11:42:20,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-06 11:42:20,052 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:42:20,052 INFO L523 BasicCegarLoop]: trace histogram [79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:42:20,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-05-06 11:42:20,052 INFO L428 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:42:20,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:42:20,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1244601650, now seen corresponding path program 79 times [2021-05-06 11:42:20,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:42:20,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [73094347] [2021-05-06 11:42:20,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:42:20,054 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:42:20,055 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:42:20,055 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:42:20,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:42:22,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:42:22,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:42:22,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:42:22,768 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:42:22,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [73094347] [2021-05-06 11:42:22,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [73094347] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:42:22,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:42:22,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2021-05-06 11:42:22,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164026652] [2021-05-06 11:42:22,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-05-06 11:42:22,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:42:22,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-05-06 11:42:22,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=6564, Unknown=0, NotChecked=0, Total=6806 [2021-05-06 11:42:22,769 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 82 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:42:45,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:42:45,388 INFO L93 Difference]: Finished difference Result 601 states and 845 transitions. [2021-05-06 11:42:45,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-05-06 11:42:45,389 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 82 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2021-05-06 11:42:45,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:42:45,390 INFO L225 Difference]: With dead ends: 601 [2021-05-06 11:42:45,390 INFO L226 Difference]: Without dead ends: 584 [2021-05-06 11:42:45,391 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2575.9ms TimeCoverageRelationStatistics Valid=242, Invalid=6564, Unknown=0, NotChecked=0, Total=6806 [2021-05-06 11:42:45,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-05-06 11:42:45,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 104. [2021-05-06 11:42:45,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 96 states have (on average 1.03125) internal successors, (99), 97 states have internal predecessors, (99), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:42:45,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2021-05-06 11:42:45,537 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 93 [2021-05-06 11:42:45,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:42:45,537 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2021-05-06 11:42:45,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 82 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:42:45,537 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2021-05-06 11:42:45,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-06 11:42:45,537 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:42:45,537 INFO L523 BasicCegarLoop]: trace histogram [80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:42:45,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-05-06 11:42:45,537 INFO L428 AbstractCegarLoop]: === Iteration 82 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:42:45,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:42:45,538 INFO L82 PathProgramCache]: Analyzing trace with hash 63225578, now seen corresponding path program 80 times [2021-05-06 11:42:45,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:42:45,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1047941467] [2021-05-06 11:42:45,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:42:45,542 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:42:45,542 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:42:45,542 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:42:45,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:42:48,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:42:48,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:42:48,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:42:48,474 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:42:48,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1047941467] [2021-05-06 11:42:48,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1047941467] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:42:48,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:42:48,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2021-05-06 11:42:48,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296064221] [2021-05-06 11:42:48,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2021-05-06 11:42:48,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:42:48,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-05-06 11:42:48,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=6727, Unknown=0, NotChecked=0, Total=6972 [2021-05-06 11:42:48,475 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand has 84 states, 84 states have (on average 1.0714285714285714) internal successors, (90), 83 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:43:12,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:43:12,706 INFO L93 Difference]: Finished difference Result 608 states and 855 transitions. [2021-05-06 11:43:12,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-05-06 11:43:12,707 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.0714285714285714) internal successors, (90), 83 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2021-05-06 11:43:12,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:43:12,708 INFO L225 Difference]: With dead ends: 608 [2021-05-06 11:43:12,708 INFO L226 Difference]: Without dead ends: 591 [2021-05-06 11:43:12,709 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2781.4ms TimeCoverageRelationStatistics Valid=245, Invalid=6727, Unknown=0, NotChecked=0, Total=6972 [2021-05-06 11:43:12,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-05-06 11:43:12,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 105. [2021-05-06 11:43:12,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 98 states have internal predecessors, (100), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:43:12,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2021-05-06 11:43:12,864 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 94 [2021-05-06 11:43:12,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:43:12,865 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2021-05-06 11:43:12,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 84 states, 84 states have (on average 1.0714285714285714) internal successors, (90), 83 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:43:12,865 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2021-05-06 11:43:12,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-06 11:43:12,865 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:43:12,865 INFO L523 BasicCegarLoop]: trace histogram [81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:43:12,865 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-05-06 11:43:12,865 INFO L428 AbstractCegarLoop]: === Iteration 83 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:43:12,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:43:12,866 INFO L82 PathProgramCache]: Analyzing trace with hash 2095273010, now seen corresponding path program 81 times [2021-05-06 11:43:12,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:43:12,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [873147596] [2021-05-06 11:43:12,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:43:12,868 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:43:12,868 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:43:12,868 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:43:12,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:43:15,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:43:15,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:43:15,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:43:15,789 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:43:15,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [873147596] [2021-05-06 11:43:15,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [873147596] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:43:15,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:43:15,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2021-05-06 11:43:15,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626482752] [2021-05-06 11:43:15,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2021-05-06 11:43:15,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:43:15,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-05-06 11:43:15,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=6892, Unknown=0, NotChecked=0, Total=7140 [2021-05-06 11:43:15,790 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand has 85 states, 85 states have (on average 1.0705882352941176) internal successors, (91), 84 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:43:40,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:43:40,449 INFO L93 Difference]: Finished difference Result 615 states and 865 transitions. [2021-05-06 11:43:40,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-05-06 11:43:40,450 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.0705882352941176) internal successors, (91), 84 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2021-05-06 11:43:40,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:43:40,451 INFO L225 Difference]: With dead ends: 615 [2021-05-06 11:43:40,451 INFO L226 Difference]: Without dead ends: 598 [2021-05-06 11:43:40,452 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2753.6ms TimeCoverageRelationStatistics Valid=248, Invalid=6892, Unknown=0, NotChecked=0, Total=7140 [2021-05-06 11:43:40,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-05-06 11:43:40,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 106. [2021-05-06 11:43:40,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 98 states have (on average 1.030612244897959) internal successors, (101), 99 states have internal predecessors, (101), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:43:40,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2021-05-06 11:43:40,620 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 95 [2021-05-06 11:43:40,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:43:40,620 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2021-05-06 11:43:40,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 85 states, 85 states have (on average 1.0705882352941176) internal successors, (91), 84 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:43:40,620 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2021-05-06 11:43:40,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-05-06 11:43:40,621 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:43:40,621 INFO L523 BasicCegarLoop]: trace histogram [82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:43:40,621 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-05-06 11:43:40,621 INFO L428 AbstractCegarLoop]: === Iteration 84 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:43:40,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:43:40,621 INFO L82 PathProgramCache]: Analyzing trace with hash 664233962, now seen corresponding path program 82 times [2021-05-06 11:43:40,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:43:40,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452260801] [2021-05-06 11:43:40,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:43:40,624 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:43:40,624 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:43:40,625 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:43:40,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:43:43,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:43:43,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:43:43,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:43:43,539 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:43:43,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1452260801] [2021-05-06 11:43:43,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1452260801] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:43:43,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:43:43,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2021-05-06 11:43:43,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906900669] [2021-05-06 11:43:43,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-05-06 11:43:43,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:43:43,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-05-06 11:43:43,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=7059, Unknown=0, NotChecked=0, Total=7310 [2021-05-06 11:43:43,540 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand has 86 states, 86 states have (on average 1.069767441860465) internal successors, (92), 85 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:44:09,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:44:09,723 INFO L93 Difference]: Finished difference Result 622 states and 875 transitions. [2021-05-06 11:44:09,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-05-06 11:44:09,723 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.069767441860465) internal successors, (92), 85 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2021-05-06 11:44:09,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:44:09,725 INFO L225 Difference]: With dead ends: 622 [2021-05-06 11:44:09,725 INFO L226 Difference]: Without dead ends: 605 [2021-05-06 11:44:09,726 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2758.8ms TimeCoverageRelationStatistics Valid=251, Invalid=7059, Unknown=0, NotChecked=0, Total=7310 [2021-05-06 11:44:09,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-05-06 11:44:09,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 107. [2021-05-06 11:44:09,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 99 states have (on average 1.0303030303030303) internal successors, (102), 100 states have internal predecessors, (102), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:44:09,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 109 transitions. [2021-05-06 11:44:09,909 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 109 transitions. Word has length 96 [2021-05-06 11:44:09,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:44:09,910 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 109 transitions. [2021-05-06 11:44:09,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 86 states, 86 states have (on average 1.069767441860465) internal successors, (92), 85 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:44:09,910 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 109 transitions. [2021-05-06 11:44:09,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-06 11:44:09,910 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:44:09,910 INFO L523 BasicCegarLoop]: trace histogram [83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:44:09,910 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-05-06 11:44:09,910 INFO L428 AbstractCegarLoop]: === Iteration 85 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:44:09,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:44:09,911 INFO L82 PathProgramCache]: Analyzing trace with hash -748303566, now seen corresponding path program 83 times [2021-05-06 11:44:09,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:44:09,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562365645] [2021-05-06 11:44:09,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:44:09,920 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:44:09,920 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:44:09,922 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:44:10,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:44:12,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:44:12,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:44:12,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:44:12,930 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:44:12,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562365645] [2021-05-06 11:44:12,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [562365645] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:44:12,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:44:12,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2021-05-06 11:44:12,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096883182] [2021-05-06 11:44:12,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 87 states [2021-05-06 11:44:12,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:44:12,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-05-06 11:44:12,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=7228, Unknown=0, NotChecked=0, Total=7482 [2021-05-06 11:44:12,931 INFO L87 Difference]: Start difference. First operand 107 states and 109 transitions. Second operand has 87 states, 87 states have (on average 1.0689655172413792) internal successors, (93), 86 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:44:40,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:44:40,829 INFO L93 Difference]: Finished difference Result 629 states and 885 transitions. [2021-05-06 11:44:40,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-05-06 11:44:40,829 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.0689655172413792) internal successors, (93), 86 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2021-05-06 11:44:40,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:44:40,831 INFO L225 Difference]: With dead ends: 629 [2021-05-06 11:44:40,831 INFO L226 Difference]: Without dead ends: 612 [2021-05-06 11:44:40,831 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2854.2ms TimeCoverageRelationStatistics Valid=254, Invalid=7228, Unknown=0, NotChecked=0, Total=7482 [2021-05-06 11:44:40,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-05-06 11:44:41,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 108. [2021-05-06 11:44:41,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 100 states have (on average 1.03) internal successors, (103), 101 states have internal predecessors, (103), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:44:41,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2021-05-06 11:44:41,016 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 97 [2021-05-06 11:44:41,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:44:41,016 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2021-05-06 11:44:41,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 87 states, 87 states have (on average 1.0689655172413792) internal successors, (93), 86 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:44:41,016 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2021-05-06 11:44:41,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-06 11:44:41,017 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:44:41,017 INFO L523 BasicCegarLoop]: trace histogram [84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:44:41,017 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-05-06 11:44:41,017 INFO L428 AbstractCegarLoop]: === Iteration 86 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:44:41,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:44:41,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1587293974, now seen corresponding path program 84 times [2021-05-06 11:44:41,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:44:41,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058578854] [2021-05-06 11:44:41,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:44:41,019 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:44:41,020 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:44:41,020 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:44:41,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:44:44,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:44:44,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:44:44,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:44:44,085 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:44:44,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058578854] [2021-05-06 11:44:44,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2058578854] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:44:44,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:44:44,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2021-05-06 11:44:44,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146845467] [2021-05-06 11:44:44,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states [2021-05-06 11:44:44,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:44:44,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-05-06 11:44:44,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=7399, Unknown=0, NotChecked=0, Total=7656 [2021-05-06 11:44:44,086 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand has 88 states, 88 states have (on average 1.0681818181818181) internal successors, (94), 87 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:45:14,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:45:14,733 INFO L93 Difference]: Finished difference Result 636 states and 895 transitions. [2021-05-06 11:45:14,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-05-06 11:45:14,734 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.0681818181818181) internal successors, (94), 87 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2021-05-06 11:45:14,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:45:14,741 INFO L225 Difference]: With dead ends: 636 [2021-05-06 11:45:14,741 INFO L226 Difference]: Without dead ends: 619 [2021-05-06 11:45:14,743 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2906.2ms TimeCoverageRelationStatistics Valid=257, Invalid=7399, Unknown=0, NotChecked=0, Total=7656 [2021-05-06 11:45:14,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-05-06 11:45:14,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 109. [2021-05-06 11:45:14,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 101 states have (on average 1.0297029702970297) internal successors, (104), 102 states have internal predecessors, (104), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:45:14,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2021-05-06 11:45:14,972 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 98 [2021-05-06 11:45:14,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:45:14,972 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2021-05-06 11:45:14,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 88 states, 88 states have (on average 1.0681818181818181) internal successors, (94), 87 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:45:14,972 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2021-05-06 11:45:14,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-05-06 11:45:14,972 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:45:14,973 INFO L523 BasicCegarLoop]: trace histogram [85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:45:14,973 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-05-06 11:45:14,973 INFO L428 AbstractCegarLoop]: === Iteration 87 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:45:14,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:45:14,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1826192846, now seen corresponding path program 85 times [2021-05-06 11:45:14,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:45:14,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1921765739] [2021-05-06 11:45:14,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:45:14,987 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:45:14,987 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:45:14,987 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:45:15,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:45:18,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:45:18,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:45:18,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:45:18,486 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:45:18,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1921765739] [2021-05-06 11:45:18,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1921765739] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:45:18,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:45:18,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2021-05-06 11:45:18,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643945559] [2021-05-06 11:45:18,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 89 states [2021-05-06 11:45:18,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:45:18,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-05-06 11:45:18,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=7572, Unknown=0, NotChecked=0, Total=7832 [2021-05-06 11:45:18,487 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand has 89 states, 89 states have (on average 1.0674157303370786) internal successors, (95), 88 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:45:49,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:45:49,942 INFO L93 Difference]: Finished difference Result 643 states and 905 transitions. [2021-05-06 11:45:49,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-05-06 11:45:49,943 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.0674157303370786) internal successors, (95), 88 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2021-05-06 11:45:49,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:45:49,944 INFO L225 Difference]: With dead ends: 643 [2021-05-06 11:45:49,944 INFO L226 Difference]: Without dead ends: 626 [2021-05-06 11:45:49,945 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 3323.5ms TimeCoverageRelationStatistics Valid=260, Invalid=7572, Unknown=0, NotChecked=0, Total=7832 [2021-05-06 11:45:49,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-05-06 11:45:50,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 110. [2021-05-06 11:45:50,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 102 states have (on average 1.0294117647058822) internal successors, (105), 103 states have internal predecessors, (105), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:45:50,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2021-05-06 11:45:50,147 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 99 [2021-05-06 11:45:50,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:45:50,147 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2021-05-06 11:45:50,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 89 states, 89 states have (on average 1.0674157303370786) internal successors, (95), 88 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:45:50,148 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2021-05-06 11:45:50,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-06 11:45:50,155 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:45:50,155 INFO L523 BasicCegarLoop]: trace histogram [86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:45:50,155 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-05-06 11:45:50,155 INFO L428 AbstractCegarLoop]: === Iteration 88 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:45:50,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:45:50,155 INFO L82 PathProgramCache]: Analyzing trace with hash -642123286, now seen corresponding path program 86 times [2021-05-06 11:45:50,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:45:50,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923917486] [2021-05-06 11:45:50,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:45:50,160 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:45:50,160 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:45:50,161 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:45:50,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:45:53,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:45:53,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:45:53,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:45:53,510 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:45:53,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923917486] [2021-05-06 11:45:53,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [923917486] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:45:53,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:45:53,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2021-05-06 11:45:53,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838555051] [2021-05-06 11:45:53,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-05-06 11:45:53,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:45:53,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-05-06 11:45:53,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=7747, Unknown=0, NotChecked=0, Total=8010 [2021-05-06 11:45:53,511 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand has 90 states, 90 states have (on average 1.0666666666666667) internal successors, (96), 89 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)