/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-lit/afnp2014.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 06:39:43,629 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 06:39:43,634 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 06:39:43,696 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-07 06:39:43,734 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 06:39:43,739 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 06:39:43,742 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 06:39:43,744 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 06:39:43,746 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 06:39:43,751 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 06:39:43,768 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 06:39:43,771 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 06:39:43,773 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 06:39:43,774 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 06:39:43,776 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 06:39:43,777 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 06:39:43,780 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 06:39:43,791 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 06:39:43,792 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 06:39:43,793 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 06:39:43,795 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 06:39:43,809 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 06:39:43,810 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 06:39:43,812 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 06:39:43,812 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 06:39:43,812 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 06:39:43,813 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 06:39:43,813 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 06:39:43,813 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 06:39:43,813 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 06:39:43,814 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 06:39:43,814 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 06:39:43,814 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 06:39:43,814 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 06:39:43,814 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 06:39:43,815 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 06:39:43,815 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 06:39:43,815 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 06:39:43,815 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 06:39:43,816 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 06:39:43,816 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 06:39:43,816 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 06:39:43,816 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 06:39:43,817 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 06:39:44,229 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 06:39:44,266 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 06:39:44,269 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 06:39:44,271 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 06:39:44,272 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 06:39:44,273 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/afnp2014.i [2020-11-07 06:39:44,359 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/606b0a503/43506e04cbd2448a854aabae5f5059d1/FLAG3351c4e4f [2020-11-07 06:39:45,076 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 06:39:45,077 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/afnp2014.i [2020-11-07 06:39:45,087 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/606b0a503/43506e04cbd2448a854aabae5f5059d1/FLAG3351c4e4f [2020-11-07 06:39:45,411 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/606b0a503/43506e04cbd2448a854aabae5f5059d1 [2020-11-07 06:39:45,415 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 06:39:45,429 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 06:39:45,434 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 06:39:45,435 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 06:39:45,440 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 06:39:45,441 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:39:45" (1/1) ... [2020-11-07 06:39:45,447 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14ffa1ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:39:45, skipping insertion in model container [2020-11-07 06:39:45,447 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:39:45" (1/1) ... [2020-11-07 06:39:45,458 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 06:39:45,483 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 06:39:45,732 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:39:45,743 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 06:39:45,764 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:39:45,783 INFO L208 MainTranslator]: Completed translation [2020-11-07 06:39:45,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:39:45 WrapperNode [2020-11-07 06:39:45,784 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 06:39:45,786 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 06:39:45,786 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 06:39:45,786 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 06:39:45,803 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:39:45" (1/1) ... [2020-11-07 06:39:45,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:39:45" (1/1) ... [2020-11-07 06:39:45,814 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:39:45" (1/1) ... [2020-11-07 06:39:45,814 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:39:45" (1/1) ... [2020-11-07 06:39:45,821 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:39:45" (1/1) ... [2020-11-07 06:39:45,826 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:39:45" (1/1) ... [2020-11-07 06:39:45,829 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:39:45" (1/1) ... [2020-11-07 06:39:45,831 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 06:39:45,832 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 06:39:45,833 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 06:39:45,833 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 06:39:45,834 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:39:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 06:39:45,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 06:39:45,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 06:39:45,929 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 06:39:45,929 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-07 06:39:45,930 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 06:39:45,930 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 06:39:45,930 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 06:39:45,930 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 06:39:45,931 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-07 06:39:45,931 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-07 06:39:45,931 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 06:39:45,931 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 06:39:45,932 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-07 06:39:45,932 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 06:39:45,932 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 06:39:45,932 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 06:39:45,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 06:39:45,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 06:39:45,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 06:39:45,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 06:39:45,933 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 06:39:45,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 06:39:46,376 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 06:39:46,377 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-07 06:39:46,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:39:46 BoogieIcfgContainer [2020-11-07 06:39:46,380 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 06:39:46,382 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 06:39:46,383 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 06:39:46,387 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 06:39:46,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:39:45" (1/3) ... [2020-11-07 06:39:46,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@629ca0b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:39:46, skipping insertion in model container [2020-11-07 06:39:46,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:39:45" (2/3) ... [2020-11-07 06:39:46,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@629ca0b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:39:46, skipping insertion in model container [2020-11-07 06:39:46,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:39:46" (3/3) ... [2020-11-07 06:39:46,392 INFO L111 eAbstractionObserver]: Analyzing ICFG afnp2014.i [2020-11-07 06:39:46,411 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 06:39:46,416 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 06:39:46,432 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 06:39:46,463 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 06:39:46,464 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 06:39:46,464 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 06:39:46,464 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 06:39:46,464 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 06:39:46,465 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 06:39:46,465 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 06:39:46,465 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 06:39:46,483 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-11-07 06:39:46,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-07 06:39:46,494 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:39:46,495 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:39:46,496 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:39:46,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:39:46,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1975152354, now seen corresponding path program 1 times [2020-11-07 06:39:46,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:39:46,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808337529] [2020-11-07 06:39:46,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:39:46,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:46,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:39:46,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:46,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:39:46,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808337529] [2020-11-07 06:39:46,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:39:46,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-07 06:39:46,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992612963] [2020-11-07 06:39:46,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-07 06:39:46,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:39:46,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-07 06:39:46,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 06:39:46,860 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 3 states. [2020-11-07 06:39:46,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:39:46,966 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2020-11-07 06:39:46,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-07 06:39:46,969 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-11-07 06:39:46,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:39:46,978 INFO L225 Difference]: With dead ends: 56 [2020-11-07 06:39:46,979 INFO L226 Difference]: Without dead ends: 31 [2020-11-07 06:39:46,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 06:39:47,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-07 06:39:47,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-11-07 06:39:47,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-07 06:39:47,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-11-07 06:39:47,040 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 20 [2020-11-07 06:39:47,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:39:47,040 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-11-07 06:39:47,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-07 06:39:47,041 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-11-07 06:39:47,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-07 06:39:47,042 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:39:47,043 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:39:47,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 06:39:47,043 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:39:47,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:39:47,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1632308722, now seen corresponding path program 1 times [2020-11-07 06:39:47,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:39:47,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400056792] [2020-11-07 06:39:47,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:39:47,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:47,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:39:47,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:47,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:39:47,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400056792] [2020-11-07 06:39:47,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:39:47,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-07 06:39:47,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252300763] [2020-11-07 06:39:47,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 06:39:47,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:39:47,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 06:39:47,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-07 06:39:47,235 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 7 states. [2020-11-07 06:39:47,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:39:47,608 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-11-07 06:39:47,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-07 06:39:47,608 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-11-07 06:39:47,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:39:47,610 INFO L225 Difference]: With dead ends: 49 [2020-11-07 06:39:47,611 INFO L226 Difference]: Without dead ends: 40 [2020-11-07 06:39:47,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-11-07 06:39:47,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-07 06:39:47,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2020-11-07 06:39:47,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-07 06:39:47,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-11-07 06:39:47,643 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 24 [2020-11-07 06:39:47,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:39:47,647 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-11-07 06:39:47,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 06:39:47,647 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-11-07 06:39:47,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-07 06:39:47,649 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:39:47,651 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:39:47,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 06:39:47,652 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:39:47,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:39:47,654 INFO L82 PathProgramCache]: Analyzing trace with hash -7380593, now seen corresponding path program 1 times [2020-11-07 06:39:47,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:39:47,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [820607357] [2020-11-07 06:39:47,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:39:47,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:47,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:39:47,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:47,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:39:47,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [820607357] [2020-11-07 06:39:47,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:39:47,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 06:39:47,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390479922] [2020-11-07 06:39:47,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 06:39:47,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:39:47,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 06:39:47,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 06:39:47,771 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 4 states. [2020-11-07 06:39:47,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:39:47,878 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2020-11-07 06:39:47,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 06:39:47,879 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-11-07 06:39:47,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:39:47,880 INFO L225 Difference]: With dead ends: 56 [2020-11-07 06:39:47,881 INFO L226 Difference]: Without dead ends: 37 [2020-11-07 06:39:47,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 06:39:47,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-07 06:39:47,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-11-07 06:39:47,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-07 06:39:47,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-11-07 06:39:47,898 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 31 [2020-11-07 06:39:47,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:39:47,899 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-11-07 06:39:47,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 06:39:47,899 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-11-07 06:39:47,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-07 06:39:47,901 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:39:47,901 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:39:47,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 06:39:47,901 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:39:47,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:39:47,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1203694188, now seen corresponding path program 1 times [2020-11-07 06:39:47,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:39:47,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393174841] [2020-11-07 06:39:47,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:39:47,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:48,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:39:48,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:48,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:39:48,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393174841] [2020-11-07 06:39:48,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:39:48,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-11-07 06:39:48,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285010104] [2020-11-07 06:39:48,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 06:39:48,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:39:48,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 06:39:48,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-07 06:39:48,020 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 6 states. [2020-11-07 06:39:48,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:39:48,329 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2020-11-07 06:39:48,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-07 06:39:48,330 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-11-07 06:39:48,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:39:48,333 INFO L225 Difference]: With dead ends: 63 [2020-11-07 06:39:48,334 INFO L226 Difference]: Without dead ends: 53 [2020-11-07 06:39:48,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2020-11-07 06:39:48,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-07 06:39:48,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 43. [2020-11-07 06:39:48,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-07 06:39:48,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-11-07 06:39:48,355 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 33 [2020-11-07 06:39:48,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:39:48,356 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-11-07 06:39:48,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 06:39:48,356 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-11-07 06:39:48,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-07 06:39:48,357 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:39:48,358 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:39:48,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 06:39:48,358 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:39:48,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:39:48,359 INFO L82 PathProgramCache]: Analyzing trace with hash -944784977, now seen corresponding path program 1 times [2020-11-07 06:39:48,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:39:48,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362177897] [2020-11-07 06:39:48,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:39:48,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:48,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:39:48,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:48,495 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:39:48,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362177897] [2020-11-07 06:39:48,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:39:48,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-07 06:39:48,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173317322] [2020-11-07 06:39:48,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 06:39:48,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:39:48,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 06:39:48,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-11-07 06:39:48,499 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 8 states. [2020-11-07 06:39:48,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:39:48,823 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-11-07 06:39:48,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-07 06:39:48,824 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-11-07 06:39:48,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:39:48,825 INFO L225 Difference]: With dead ends: 58 [2020-11-07 06:39:48,825 INFO L226 Difference]: Without dead ends: 49 [2020-11-07 06:39:48,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-11-07 06:39:48,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-07 06:39:48,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2020-11-07 06:39:48,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-11-07 06:39:48,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-11-07 06:39:48,842 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 35 [2020-11-07 06:39:48,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:39:48,843 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-11-07 06:39:48,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 06:39:48,843 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-11-07 06:39:48,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-07 06:39:48,845 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:39:48,845 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:39:48,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 06:39:48,845 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:39:48,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:39:48,846 INFO L82 PathProgramCache]: Analyzing trace with hash 2061662002, now seen corresponding path program 2 times [2020-11-07 06:39:48,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:39:48,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1041293715] [2020-11-07 06:39:48,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:39:48,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:48,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:39:48,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:48,944 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:39:48,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1041293715] [2020-11-07 06:39:48,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:39:48,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-07 06:39:48,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394850034] [2020-11-07 06:39:48,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 06:39:48,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:39:48,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 06:39:48,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-11-07 06:39:48,948 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 7 states. [2020-11-07 06:39:49,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:39:49,298 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2020-11-07 06:39:49,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-07 06:39:49,299 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-11-07 06:39:49,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:39:49,300 INFO L225 Difference]: With dead ends: 72 [2020-11-07 06:39:49,300 INFO L226 Difference]: Without dead ends: 62 [2020-11-07 06:39:49,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2020-11-07 06:39:49,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-11-07 06:39:49,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 52. [2020-11-07 06:39:49,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-11-07 06:39:49,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-11-07 06:39:49,317 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 42 [2020-11-07 06:39:49,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:39:49,317 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-11-07 06:39:49,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 06:39:49,317 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-11-07 06:39:49,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-07 06:39:49,319 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:39:49,319 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:39:49,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 06:39:49,320 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:39:49,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:39:49,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1071436555, now seen corresponding path program 2 times [2020-11-07 06:39:49,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:39:49,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2046019533] [2020-11-07 06:39:49,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:39:49,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:49,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:39:49,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:49,504 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:39:49,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2046019533] [2020-11-07 06:39:49,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:39:49,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-11-07 06:39:49,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960664263] [2020-11-07 06:39:49,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-07 06:39:49,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:39:49,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-07 06:39:49,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-11-07 06:39:49,507 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 10 states. [2020-11-07 06:39:49,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:39:49,918 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-11-07 06:39:49,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-07 06:39:49,918 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 44 [2020-11-07 06:39:49,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:39:49,920 INFO L225 Difference]: With dead ends: 67 [2020-11-07 06:39:49,920 INFO L226 Difference]: Without dead ends: 58 [2020-11-07 06:39:49,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-11-07 06:39:49,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-07 06:39:49,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2020-11-07 06:39:49,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-07 06:39:49,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-11-07 06:39:49,949 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 44 [2020-11-07 06:39:49,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:39:49,951 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-11-07 06:39:49,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-07 06:39:49,951 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-11-07 06:39:49,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-07 06:39:49,953 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:39:49,954 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:39:49,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 06:39:49,954 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:39:49,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:39:49,955 INFO L82 PathProgramCache]: Analyzing trace with hash 969533740, now seen corresponding path program 3 times [2020-11-07 06:39:49,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:39:49,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867769196] [2020-11-07 06:39:49,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:39:49,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:50,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:39:50,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:50,090 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:39:50,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867769196] [2020-11-07 06:39:50,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:39:50,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-07 06:39:50,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547096841] [2020-11-07 06:39:50,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 06:39:50,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:39:50,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 06:39:50,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-11-07 06:39:50,093 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 8 states. [2020-11-07 06:39:50,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:39:50,576 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2020-11-07 06:39:50,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-07 06:39:50,576 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-11-07 06:39:50,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:39:50,578 INFO L225 Difference]: With dead ends: 81 [2020-11-07 06:39:50,578 INFO L226 Difference]: Without dead ends: 71 [2020-11-07 06:39:50,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2020-11-07 06:39:50,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-11-07 06:39:50,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2020-11-07 06:39:50,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-07 06:39:50,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-11-07 06:39:50,597 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 51 [2020-11-07 06:39:50,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:39:50,598 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-11-07 06:39:50,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 06:39:50,598 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-11-07 06:39:50,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-07 06:39:50,599 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:39:50,599 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:39:50,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 06:39:50,600 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:39:50,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:39:50,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1660291183, now seen corresponding path program 3 times [2020-11-07 06:39:50,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:39:50,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1673915505] [2020-11-07 06:39:50,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:39:50,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:50,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:39:50,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:50,783 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:39:50,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1673915505] [2020-11-07 06:39:50,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:39:50,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-11-07 06:39:50,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910272959] [2020-11-07 06:39:50,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 06:39:50,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:39:50,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 06:39:50,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-11-07 06:39:50,786 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 12 states. [2020-11-07 06:39:51,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:39:51,603 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2020-11-07 06:39:51,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-07 06:39:51,604 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-11-07 06:39:51,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:39:51,606 INFO L225 Difference]: With dead ends: 89 [2020-11-07 06:39:51,606 INFO L226 Difference]: Without dead ends: 76 [2020-11-07 06:39:51,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2020-11-07 06:39:51,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-11-07 06:39:51,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2020-11-07 06:39:51,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-07 06:39:51,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2020-11-07 06:39:51,635 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 53 [2020-11-07 06:39:51,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:39:51,636 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2020-11-07 06:39:51,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 06:39:51,636 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2020-11-07 06:39:51,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-11-07 06:39:51,638 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:39:51,638 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:39:51,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-07 06:39:51,638 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:39:51,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:39:51,639 INFO L82 PathProgramCache]: Analyzing trace with hash -904218644, now seen corresponding path program 4 times [2020-11-07 06:39:51,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:39:51,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [169247636] [2020-11-07 06:39:51,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:39:51,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:51,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:39:51,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:51,854 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 5 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:39:51,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [169247636] [2020-11-07 06:39:51,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:39:51,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-11-07 06:39:51,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986465754] [2020-11-07 06:39:51,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-07 06:39:51,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:39:51,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-07 06:39:51,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-11-07 06:39:51,857 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 10 states. [2020-11-07 06:39:52,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:39:52,544 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2020-11-07 06:39:52,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-07 06:39:52,545 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-11-07 06:39:52,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:39:52,546 INFO L225 Difference]: With dead ends: 99 [2020-11-07 06:39:52,546 INFO L226 Difference]: Without dead ends: 89 [2020-11-07 06:39:52,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2020-11-07 06:39:52,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-11-07 06:39:52,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2020-11-07 06:39:52,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-11-07 06:39:52,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2020-11-07 06:39:52,599 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 69 [2020-11-07 06:39:52,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:39:52,600 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2020-11-07 06:39:52,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-07 06:39:52,600 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2020-11-07 06:39:52,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-07 06:39:52,605 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:39:52,605 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:39:52,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-07 06:39:52,609 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:39:52,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:39:52,609 INFO L82 PathProgramCache]: Analyzing trace with hash 575547183, now seen corresponding path program 4 times [2020-11-07 06:39:52,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:39:52,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674956527] [2020-11-07 06:39:52,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:39:52,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:52,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:39:52,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:52,988 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:39:52,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674956527] [2020-11-07 06:39:52,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:39:52,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-11-07 06:39:52,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910427095] [2020-11-07 06:39:52,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-07 06:39:52,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:39:52,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-07 06:39:52,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-11-07 06:39:52,996 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 16 states. [2020-11-07 06:39:54,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:39:54,163 INFO L93 Difference]: Finished difference Result 107 states and 110 transitions. [2020-11-07 06:39:54,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-07 06:39:54,164 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 71 [2020-11-07 06:39:54,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:39:54,165 INFO L225 Difference]: With dead ends: 107 [2020-11-07 06:39:54,165 INFO L226 Difference]: Without dead ends: 94 [2020-11-07 06:39:54,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2020-11-07 06:39:54,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-11-07 06:39:54,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2020-11-07 06:39:54,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-11-07 06:39:54,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2020-11-07 06:39:54,192 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 71 [2020-11-07 06:39:54,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:39:54,193 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2020-11-07 06:39:54,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-07 06:39:54,193 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2020-11-07 06:39:54,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-11-07 06:39:54,196 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:39:54,197 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:39:54,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-07 06:39:54,197 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:39:54,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:39:54,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1088247468, now seen corresponding path program 5 times [2020-11-07 06:39:54,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:39:54,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1290394182] [2020-11-07 06:39:54,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:39:54,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:54,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:39:54,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:54,449 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 7 proven. 203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:39:54,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1290394182] [2020-11-07 06:39:54,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:39:54,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-11-07 06:39:54,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290882642] [2020-11-07 06:39:54,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 06:39:54,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:39:54,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 06:39:54,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-11-07 06:39:54,452 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 12 states. [2020-11-07 06:39:55,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:39:55,356 INFO L93 Difference]: Finished difference Result 117 states and 119 transitions. [2020-11-07 06:39:55,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-07 06:39:55,357 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 87 [2020-11-07 06:39:55,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:39:55,358 INFO L225 Difference]: With dead ends: 117 [2020-11-07 06:39:55,358 INFO L226 Difference]: Without dead ends: 107 [2020-11-07 06:39:55,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=281, Invalid=531, Unknown=0, NotChecked=0, Total=812 [2020-11-07 06:39:55,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-11-07 06:39:55,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 97. [2020-11-07 06:39:55,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-11-07 06:39:55,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2020-11-07 06:39:55,383 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 87 [2020-11-07 06:39:55,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:39:55,384 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2020-11-07 06:39:55,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 06:39:55,384 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2020-11-07 06:39:55,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-11-07 06:39:55,385 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:39:55,385 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:39:55,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-07 06:39:55,385 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:39:55,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:39:55,386 INFO L82 PathProgramCache]: Analyzing trace with hash -219933201, now seen corresponding path program 5 times [2020-11-07 06:39:55,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:39:55,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400890297] [2020-11-07 06:39:55,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:39:55,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:55,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:39:55,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:55,727 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:39:55,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400890297] [2020-11-07 06:39:55,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:39:55,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-11-07 06:39:55,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741804957] [2020-11-07 06:39:55,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-07 06:39:55,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:39:55,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-07 06:39:55,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2020-11-07 06:39:55,732 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 20 states. [2020-11-07 06:39:57,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:39:57,466 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2020-11-07 06:39:57,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-07 06:39:57,466 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 89 [2020-11-07 06:39:57,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:39:57,467 INFO L225 Difference]: With dead ends: 125 [2020-11-07 06:39:57,468 INFO L226 Difference]: Without dead ends: 112 [2020-11-07 06:39:57,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=159, Invalid=1323, Unknown=0, NotChecked=0, Total=1482 [2020-11-07 06:39:57,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-11-07 06:39:57,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2020-11-07 06:39:57,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-11-07 06:39:57,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2020-11-07 06:39:57,496 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 89 [2020-11-07 06:39:57,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:39:57,497 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2020-11-07 06:39:57,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-07 06:39:57,497 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2020-11-07 06:39:57,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-11-07 06:39:57,498 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:39:57,498 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:39:57,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-07 06:39:57,499 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:39:57,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:39:57,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1287797396, now seen corresponding path program 6 times [2020-11-07 06:39:57,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:39:57,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [276027386] [2020-11-07 06:39:57,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:39:57,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:57,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:39:57,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:57,746 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 9 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:39:57,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [276027386] [2020-11-07 06:39:57,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:39:57,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-11-07 06:39:57,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214892508] [2020-11-07 06:39:57,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-07 06:39:57,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:39:57,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-07 06:39:57,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-11-07 06:39:57,750 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 14 states. [2020-11-07 06:39:58,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:39:58,882 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2020-11-07 06:39:58,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-07 06:39:58,883 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 105 [2020-11-07 06:39:58,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:39:58,885 INFO L225 Difference]: With dead ends: 135 [2020-11-07 06:39:58,885 INFO L226 Difference]: Without dead ends: 125 [2020-11-07 06:39:58,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=409, Invalid=781, Unknown=0, NotChecked=0, Total=1190 [2020-11-07 06:39:58,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-11-07 06:39:58,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 115. [2020-11-07 06:39:58,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-11-07 06:39:58,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2020-11-07 06:39:58,909 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 105 [2020-11-07 06:39:58,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:39:58,909 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2020-11-07 06:39:58,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-07 06:39:58,909 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2020-11-07 06:39:58,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-11-07 06:39:58,910 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:39:58,911 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:39:58,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-07 06:39:58,911 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:39:58,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:39:58,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1323553967, now seen corresponding path program 6 times [2020-11-07 06:39:58,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:39:58,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766487034] [2020-11-07 06:39:58,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:39:58,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:59,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:39:59,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:59,531 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 0 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:39:59,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766487034] [2020-11-07 06:39:59,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:39:59,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-11-07 06:39:59,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761044666] [2020-11-07 06:39:59,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-07 06:39:59,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:39:59,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-07 06:39:59,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2020-11-07 06:39:59,536 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 24 states. [2020-11-07 06:40:01,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:40:01,773 INFO L93 Difference]: Finished difference Result 143 states and 146 transitions. [2020-11-07 06:40:01,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-07 06:40:01,774 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 107 [2020-11-07 06:40:01,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:40:01,776 INFO L225 Difference]: With dead ends: 143 [2020-11-07 06:40:01,776 INFO L226 Difference]: Without dead ends: 130 [2020-11-07 06:40:01,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=195, Invalid=1967, Unknown=0, NotChecked=0, Total=2162 [2020-11-07 06:40:01,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-11-07 06:40:01,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 127. [2020-11-07 06:40:01,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-11-07 06:40:01,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2020-11-07 06:40:01,809 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 107 [2020-11-07 06:40:01,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:40:01,810 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2020-11-07 06:40:01,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-07 06:40:01,810 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2020-11-07 06:40:01,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-11-07 06:40:01,811 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:40:01,811 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:40:01,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-07 06:40:01,812 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:40:01,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:40:01,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1016593364, now seen corresponding path program 7 times [2020-11-07 06:40:01,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:40:01,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [864515475] [2020-11-07 06:40:01,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:40:01,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:02,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:40:02,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:02,085 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 11 proven. 517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:40:02,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [864515475] [2020-11-07 06:40:02,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:40:02,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-11-07 06:40:02,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883525506] [2020-11-07 06:40:02,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-07 06:40:02,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:40:02,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-07 06:40:02,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-11-07 06:40:02,087 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 16 states. [2020-11-07 06:40:03,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:40:03,460 INFO L93 Difference]: Finished difference Result 153 states and 155 transitions. [2020-11-07 06:40:03,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-07 06:40:03,460 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 123 [2020-11-07 06:40:03,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:40:03,462 INFO L225 Difference]: With dead ends: 153 [2020-11-07 06:40:03,463 INFO L226 Difference]: Without dead ends: 143 [2020-11-07 06:40:03,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=561, Invalid=1079, Unknown=0, NotChecked=0, Total=1640 [2020-11-07 06:40:03,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-11-07 06:40:03,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 133. [2020-11-07 06:40:03,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-11-07 06:40:03,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2020-11-07 06:40:03,490 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 123 [2020-11-07 06:40:03,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:40:03,490 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2020-11-07 06:40:03,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-07 06:40:03,490 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2020-11-07 06:40:03,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-11-07 06:40:03,492 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:40:03,492 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:40:03,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-07 06:40:03,492 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:40:03,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:40:03,493 INFO L82 PathProgramCache]: Analyzing trace with hash -42376337, now seen corresponding path program 7 times [2020-11-07 06:40:03,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:40:03,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197222805] [2020-11-07 06:40:03,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:40:03,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:04,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:40:04,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:04,093 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 0 proven. 550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:40:04,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197222805] [2020-11-07 06:40:04,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:40:04,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-11-07 06:40:04,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633562658] [2020-11-07 06:40:04,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-07 06:40:04,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:40:04,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-07 06:40:04,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=692, Unknown=0, NotChecked=0, Total=756 [2020-11-07 06:40:04,096 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 28 states. [2020-11-07 06:40:06,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:40:06,962 INFO L93 Difference]: Finished difference Result 161 states and 164 transitions. [2020-11-07 06:40:06,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-07 06:40:06,963 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 125 [2020-11-07 06:40:06,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:40:06,964 INFO L225 Difference]: With dead ends: 161 [2020-11-07 06:40:06,964 INFO L226 Difference]: Without dead ends: 148 [2020-11-07 06:40:06,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=231, Invalid=2739, Unknown=0, NotChecked=0, Total=2970 [2020-11-07 06:40:06,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-11-07 06:40:06,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 145. [2020-11-07 06:40:06,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-11-07 06:40:06,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2020-11-07 06:40:06,997 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 125 [2020-11-07 06:40:06,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:40:06,998 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2020-11-07 06:40:06,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-07 06:40:06,998 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2020-11-07 06:40:06,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-07 06:40:06,999 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:40:07,000 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:40:07,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-11-07 06:40:07,000 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:40:07,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:40:07,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1619530476, now seen corresponding path program 8 times [2020-11-07 06:40:07,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:40:07,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071303839] [2020-11-07 06:40:07,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:40:07,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:07,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:40:07,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:07,313 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 13 proven. 728 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:40:07,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071303839] [2020-11-07 06:40:07,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:40:07,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-11-07 06:40:07,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499222130] [2020-11-07 06:40:07,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-07 06:40:07,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:40:07,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-07 06:40:07,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-11-07 06:40:07,316 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 18 states. [2020-11-07 06:40:08,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:40:08,997 INFO L93 Difference]: Finished difference Result 171 states and 173 transitions. [2020-11-07 06:40:08,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-07 06:40:08,998 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 141 [2020-11-07 06:40:08,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:40:09,000 INFO L225 Difference]: With dead ends: 171 [2020-11-07 06:40:09,000 INFO L226 Difference]: Without dead ends: 161 [2020-11-07 06:40:09,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=737, Invalid=1425, Unknown=0, NotChecked=0, Total=2162 [2020-11-07 06:40:09,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-11-07 06:40:09,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 151. [2020-11-07 06:40:09,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-11-07 06:40:09,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2020-11-07 06:40:09,038 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 141 [2020-11-07 06:40:09,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:40:09,038 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2020-11-07 06:40:09,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-07 06:40:09,038 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2020-11-07 06:40:09,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-11-07 06:40:09,040 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:40:09,040 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:40:09,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-11-07 06:40:09,041 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:40:09,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:40:09,041 INFO L82 PathProgramCache]: Analyzing trace with hash -758070737, now seen corresponding path program 8 times [2020-11-07 06:40:09,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:40:09,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2097382755] [2020-11-07 06:40:09,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:40:09,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:09,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:40:09,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:09,838 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 0 proven. 767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:40:09,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2097382755] [2020-11-07 06:40:09,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:40:09,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-11-07 06:40:09,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12793168] [2020-11-07 06:40:09,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-11-07 06:40:09,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:40:09,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-11-07 06:40:09,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=918, Unknown=0, NotChecked=0, Total=992 [2020-11-07 06:40:09,842 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand 32 states. [2020-11-07 06:40:13,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:40:13,418 INFO L93 Difference]: Finished difference Result 179 states and 182 transitions. [2020-11-07 06:40:13,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-07 06:40:13,419 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 143 [2020-11-07 06:40:13,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:40:13,421 INFO L225 Difference]: With dead ends: 179 [2020-11-07 06:40:13,421 INFO L226 Difference]: Without dead ends: 166 [2020-11-07 06:40:13,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=267, Invalid=3639, Unknown=0, NotChecked=0, Total=3906 [2020-11-07 06:40:13,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-11-07 06:40:13,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 163. [2020-11-07 06:40:13,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-11-07 06:40:13,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2020-11-07 06:40:13,460 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 143 [2020-11-07 06:40:13,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:40:13,461 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2020-11-07 06:40:13,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-11-07 06:40:13,461 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2020-11-07 06:40:13,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-11-07 06:40:13,463 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:40:13,463 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:40:13,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-11-07 06:40:13,463 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:40:13,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:40:13,464 INFO L82 PathProgramCache]: Analyzing trace with hash -2033585748, now seen corresponding path program 9 times [2020-11-07 06:40:13,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:40:13,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665488444] [2020-11-07 06:40:13,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:40:13,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:13,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:40:13,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:13,832 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 15 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:40:13,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665488444] [2020-11-07 06:40:13,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:40:13,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-11-07 06:40:13,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207403440] [2020-11-07 06:40:13,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-07 06:40:13,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:40:13,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-07 06:40:13,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-11-07 06:40:13,837 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand 20 states. [2020-11-07 06:40:15,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:40:15,735 INFO L93 Difference]: Finished difference Result 189 states and 191 transitions. [2020-11-07 06:40:15,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-07 06:40:15,735 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 159 [2020-11-07 06:40:15,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:40:15,737 INFO L225 Difference]: With dead ends: 189 [2020-11-07 06:40:15,738 INFO L226 Difference]: Without dead ends: 179 [2020-11-07 06:40:15,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=937, Invalid=1819, Unknown=0, NotChecked=0, Total=2756 [2020-11-07 06:40:15,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-11-07 06:40:15,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 169. [2020-11-07 06:40:15,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-11-07 06:40:15,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2020-11-07 06:40:15,786 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 159 [2020-11-07 06:40:15,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:40:15,786 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2020-11-07 06:40:15,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-07 06:40:15,787 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2020-11-07 06:40:15,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-11-07 06:40:15,788 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:40:15,789 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:40:15,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-11-07 06:40:15,789 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:40:15,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:40:15,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1880486127, now seen corresponding path program 9 times [2020-11-07 06:40:15,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:40:15,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632562686] [2020-11-07 06:40:15,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:40:15,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:16,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:40:16,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:16,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 0 proven. 1020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:40:16,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632562686] [2020-11-07 06:40:16,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:40:16,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-11-07 06:40:16,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288076781] [2020-11-07 06:40:16,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-11-07 06:40:16,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:40:16,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-11-07 06:40:16,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1176, Unknown=0, NotChecked=0, Total=1260 [2020-11-07 06:40:16,801 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand 36 states. [2020-11-07 06:40:21,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:40:21,160 INFO L93 Difference]: Finished difference Result 197 states and 200 transitions. [2020-11-07 06:40:21,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-07 06:40:21,162 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 161 [2020-11-07 06:40:21,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:40:21,164 INFO L225 Difference]: With dead ends: 197 [2020-11-07 06:40:21,164 INFO L226 Difference]: Without dead ends: 184 [2020-11-07 06:40:21,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=303, Invalid=4667, Unknown=0, NotChecked=0, Total=4970 [2020-11-07 06:40:21,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-11-07 06:40:21,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 181. [2020-11-07 06:40:21,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-11-07 06:40:21,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2020-11-07 06:40:21,215 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 161 [2020-11-07 06:40:21,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:40:21,216 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2020-11-07 06:40:21,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-11-07 06:40:21,216 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2020-11-07 06:40:21,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-11-07 06:40:21,218 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:40:21,218 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:40:21,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-11-07 06:40:21,219 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:40:21,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:40:21,219 INFO L82 PathProgramCache]: Analyzing trace with hash -10903444, now seen corresponding path program 10 times [2020-11-07 06:40:21,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:40:21,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657941750] [2020-11-07 06:40:21,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:40:21,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:21,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:40:21,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:21,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 17 proven. 1258 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:40:21,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [657941750] [2020-11-07 06:40:21,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:40:21,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-11-07 06:40:21,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135978275] [2020-11-07 06:40:21,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-07 06:40:21,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:40:21,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-07 06:40:21,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-11-07 06:40:21,627 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand 22 states. [2020-11-07 06:40:23,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:40:23,887 INFO L93 Difference]: Finished difference Result 207 states and 209 transitions. [2020-11-07 06:40:23,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-07 06:40:23,888 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 177 [2020-11-07 06:40:23,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:40:23,891 INFO L225 Difference]: With dead ends: 207 [2020-11-07 06:40:23,891 INFO L226 Difference]: Without dead ends: 197 [2020-11-07 06:40:23,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1161, Invalid=2261, Unknown=0, NotChecked=0, Total=3422 [2020-11-07 06:40:23,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-11-07 06:40:23,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 187. [2020-11-07 06:40:23,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-11-07 06:40:23,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2020-11-07 06:40:23,958 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 177 [2020-11-07 06:40:23,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:40:23,959 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2020-11-07 06:40:23,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-07 06:40:23,959 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2020-11-07 06:40:23,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-11-07 06:40:23,964 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:40:23,964 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:40:23,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-11-07 06:40:23,965 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:40:23,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:40:23,965 INFO L82 PathProgramCache]: Analyzing trace with hash 57995183, now seen corresponding path program 10 times [2020-11-07 06:40:23,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:40:23,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516038756] [2020-11-07 06:40:23,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:40:23,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:25,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:40:25,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:25,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 0 proven. 1309 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:40:25,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516038756] [2020-11-07 06:40:25,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:40:25,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-11-07 06:40:25,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454740615] [2020-11-07 06:40:25,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-11-07 06:40:25,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:40:25,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-11-07 06:40:25,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1466, Unknown=0, NotChecked=0, Total=1560 [2020-11-07 06:40:25,209 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand 40 states. [2020-11-07 06:40:30,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:40:30,625 INFO L93 Difference]: Finished difference Result 215 states and 218 transitions. [2020-11-07 06:40:30,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-07 06:40:30,626 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 179 [2020-11-07 06:40:30,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:40:30,628 INFO L225 Difference]: With dead ends: 215 [2020-11-07 06:40:30,628 INFO L226 Difference]: Without dead ends: 202 [2020-11-07 06:40:30,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1589 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=339, Invalid=5823, Unknown=0, NotChecked=0, Total=6162 [2020-11-07 06:40:30,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-11-07 06:40:30,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 199. [2020-11-07 06:40:30,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-11-07 06:40:30,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 200 transitions. [2020-11-07 06:40:30,683 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 200 transitions. Word has length 179 [2020-11-07 06:40:30,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:40:30,683 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 200 transitions. [2020-11-07 06:40:30,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-11-07 06:40:30,683 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 200 transitions. [2020-11-07 06:40:30,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-11-07 06:40:30,685 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:40:30,686 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:40:30,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-11-07 06:40:30,686 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:40:30,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:40:30,687 INFO L82 PathProgramCache]: Analyzing trace with hash 543366956, now seen corresponding path program 11 times [2020-11-07 06:40:30,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:40:30,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1992223274] [2020-11-07 06:40:30,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:40:30,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:31,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:40:31,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:31,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 19 proven. 1577 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:40:31,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1992223274] [2020-11-07 06:40:31,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:40:31,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-11-07 06:40:31,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706371969] [2020-11-07 06:40:31,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-07 06:40:31,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:40:31,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-07 06:40:31,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-11-07 06:40:31,189 INFO L87 Difference]: Start difference. First operand 199 states and 200 transitions. Second operand 24 states. [2020-11-07 06:40:33,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:40:33,794 INFO L93 Difference]: Finished difference Result 225 states and 227 transitions. [2020-11-07 06:40:33,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-07 06:40:33,795 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 195 [2020-11-07 06:40:33,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:40:33,797 INFO L225 Difference]: With dead ends: 225 [2020-11-07 06:40:33,797 INFO L226 Difference]: Without dead ends: 215 [2020-11-07 06:40:33,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1409, Invalid=2751, Unknown=0, NotChecked=0, Total=4160 [2020-11-07 06:40:33,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-11-07 06:40:33,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 205. [2020-11-07 06:40:33,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-11-07 06:40:33,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 206 transitions. [2020-11-07 06:40:33,856 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 206 transitions. Word has length 195 [2020-11-07 06:40:33,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:40:33,856 INFO L481 AbstractCegarLoop]: Abstraction has 205 states and 206 transitions. [2020-11-07 06:40:33,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-07 06:40:33,857 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 206 transitions. [2020-11-07 06:40:33,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-11-07 06:40:33,858 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:40:33,858 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:40:33,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-11-07 06:40:33,858 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:40:33,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:40:33,859 INFO L82 PathProgramCache]: Analyzing trace with hash 135904879, now seen corresponding path program 11 times [2020-11-07 06:40:33,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:40:33,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083849689] [2020-11-07 06:40:33,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:40:33,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:35,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:40:35,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:35,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1634 backedges. 0 proven. 1634 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:40:35,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083849689] [2020-11-07 06:40:35,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:40:35,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-11-07 06:40:35,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185140914] [2020-11-07 06:40:35,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-11-07 06:40:35,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:40:35,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-11-07 06:40:35,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1788, Unknown=0, NotChecked=0, Total=1892 [2020-11-07 06:40:35,351 INFO L87 Difference]: Start difference. First operand 205 states and 206 transitions. Second operand 44 states. [2020-11-07 06:40:41,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:40:41,758 INFO L93 Difference]: Finished difference Result 233 states and 236 transitions. [2020-11-07 06:40:41,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-07 06:40:41,766 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 197 [2020-11-07 06:40:41,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:40:41,768 INFO L225 Difference]: With dead ends: 233 [2020-11-07 06:40:41,768 INFO L226 Difference]: Without dead ends: 220 [2020-11-07 06:40:41,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1965 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=375, Invalid=7107, Unknown=0, NotChecked=0, Total=7482 [2020-11-07 06:40:41,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-11-07 06:40:41,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 217. [2020-11-07 06:40:41,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-11-07 06:40:41,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 218 transitions. [2020-11-07 06:40:41,822 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 218 transitions. Word has length 197 [2020-11-07 06:40:41,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:40:41,822 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 218 transitions. [2020-11-07 06:40:41,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-11-07 06:40:41,822 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 218 transitions. [2020-11-07 06:40:41,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-11-07 06:40:41,823 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:40:41,823 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:40:41,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-11-07 06:40:41,824 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:40:41,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:40:41,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1928172052, now seen corresponding path program 12 times [2020-11-07 06:40:41,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:40:41,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1141585223] [2020-11-07 06:40:41,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:40:41,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:42,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:40:42,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:42,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 21 proven. 1932 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:40:42,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1141585223] [2020-11-07 06:40:42,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:40:42,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-11-07 06:40:42,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194171488] [2020-11-07 06:40:42,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-07 06:40:42,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:40:42,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-07 06:40:42,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-11-07 06:40:42,392 INFO L87 Difference]: Start difference. First operand 217 states and 218 transitions. Second operand 26 states. [2020-11-07 06:40:45,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:40:45,263 INFO L93 Difference]: Finished difference Result 243 states and 245 transitions. [2020-11-07 06:40:45,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-07 06:40:45,263 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 213 [2020-11-07 06:40:45,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:40:45,266 INFO L225 Difference]: With dead ends: 243 [2020-11-07 06:40:45,266 INFO L226 Difference]: Without dead ends: 233 [2020-11-07 06:40:45,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1241 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1681, Invalid=3289, Unknown=0, NotChecked=0, Total=4970 [2020-11-07 06:40:45,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-11-07 06:40:45,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 223. [2020-11-07 06:40:45,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-11-07 06:40:45,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 224 transitions. [2020-11-07 06:40:45,344 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 224 transitions. Word has length 213 [2020-11-07 06:40:45,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:40:45,345 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 224 transitions. [2020-11-07 06:40:45,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-07 06:40:45,345 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 224 transitions. [2020-11-07 06:40:45,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-11-07 06:40:45,346 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:40:45,346 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:40:45,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-11-07 06:40:45,347 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:40:45,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:40:45,347 INFO L82 PathProgramCache]: Analyzing trace with hash 103832879, now seen corresponding path program 12 times [2020-11-07 06:40:45,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:40:45,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1353461887] [2020-11-07 06:40:45,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:40:45,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:46,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:40:46,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:47,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1995 backedges. 0 proven. 1995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:40:47,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1353461887] [2020-11-07 06:40:47,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:40:47,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-11-07 06:40:47,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527318588] [2020-11-07 06:40:47,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-11-07 06:40:47,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:40:47,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-11-07 06:40:47,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=2142, Unknown=0, NotChecked=0, Total=2256 [2020-11-07 06:40:47,049 INFO L87 Difference]: Start difference. First operand 223 states and 224 transitions. Second operand 48 states. [2020-11-07 06:40:54,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:40:54,270 INFO L93 Difference]: Finished difference Result 251 states and 254 transitions. [2020-11-07 06:40:54,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-11-07 06:40:54,271 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 215 [2020-11-07 06:40:54,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:40:54,274 INFO L225 Difference]: With dead ends: 251 [2020-11-07 06:40:54,274 INFO L226 Difference]: Without dead ends: 238 [2020-11-07 06:40:54,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2381 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=411, Invalid=8519, Unknown=0, NotChecked=0, Total=8930 [2020-11-07 06:40:54,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-11-07 06:40:54,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 235. [2020-11-07 06:40:54,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-11-07 06:40:54,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 236 transitions. [2020-11-07 06:40:54,345 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 236 transitions. Word has length 215 [2020-11-07 06:40:54,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:40:54,346 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 236 transitions. [2020-11-07 06:40:54,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-11-07 06:40:54,346 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 236 transitions. [2020-11-07 06:40:54,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-11-07 06:40:54,347 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:40:54,347 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:40:54,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-11-07 06:40:54,348 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:40:54,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:40:54,348 INFO L82 PathProgramCache]: Analyzing trace with hash -174879572, now seen corresponding path program 13 times [2020-11-07 06:40:54,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:40:54,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171778099] [2020-11-07 06:40:54,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:40:54,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:54,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:40:54,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:55,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 23 proven. 2323 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:40:55,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171778099] [2020-11-07 06:40:55,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:40:55,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-11-07 06:40:55,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018938266] [2020-11-07 06:40:55,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-07 06:40:55,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:40:55,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-07 06:40:55,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2020-11-07 06:40:55,003 INFO L87 Difference]: Start difference. First operand 235 states and 236 transitions. Second operand 28 states. [2020-11-07 06:40:58,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:40:58,236 INFO L93 Difference]: Finished difference Result 261 states and 263 transitions. [2020-11-07 06:40:58,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-07 06:40:58,237 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 231 [2020-11-07 06:40:58,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:40:58,239 INFO L225 Difference]: With dead ends: 261 [2020-11-07 06:40:58,240 INFO L226 Difference]: Without dead ends: 251 [2020-11-07 06:40:58,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1474 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1977, Invalid=3875, Unknown=0, NotChecked=0, Total=5852 [2020-11-07 06:40:58,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-11-07 06:40:58,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 241. [2020-11-07 06:40:58,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-11-07 06:40:58,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 242 transitions. [2020-11-07 06:40:58,337 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 242 transitions. Word has length 231 [2020-11-07 06:40:58,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:40:58,338 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 242 transitions. [2020-11-07 06:40:58,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-07 06:40:58,338 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 242 transitions. [2020-11-07 06:40:58,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-11-07 06:40:58,339 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:40:58,340 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:40:58,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-11-07 06:40:58,340 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:40:58,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:40:58,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1390726127, now seen corresponding path program 13 times [2020-11-07 06:40:58,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:40:58,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1774077810] [2020-11-07 06:40:58,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:40:58,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:00,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:41:00,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:00,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2392 backedges. 0 proven. 2392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:41:00,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1774077810] [2020-11-07 06:41:00,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:41:00,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-11-07 06:41:00,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462981882] [2020-11-07 06:41:00,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-11-07 06:41:00,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:41:00,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-11-07 06:41:00,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=2528, Unknown=0, NotChecked=0, Total=2652 [2020-11-07 06:41:00,298 INFO L87 Difference]: Start difference. First operand 241 states and 242 transitions. Second operand 52 states. [2020-11-07 06:41:08,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:41:08,878 INFO L93 Difference]: Finished difference Result 269 states and 272 transitions. [2020-11-07 06:41:08,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-11-07 06:41:08,879 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 233 [2020-11-07 06:41:08,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:41:08,881 INFO L225 Difference]: With dead ends: 269 [2020-11-07 06:41:08,881 INFO L226 Difference]: Without dead ends: 256 [2020-11-07 06:41:08,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2837 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=447, Invalid=10059, Unknown=0, NotChecked=0, Total=10506 [2020-11-07 06:41:08,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-11-07 06:41:08,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 253. [2020-11-07 06:41:08,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-11-07 06:41:08,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 254 transitions. [2020-11-07 06:41:08,990 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 254 transitions. Word has length 233 [2020-11-07 06:41:08,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:41:08,990 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 254 transitions. [2020-11-07 06:41:08,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-11-07 06:41:08,991 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 254 transitions. [2020-11-07 06:41:08,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-11-07 06:41:08,992 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:41:08,992 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:41:08,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-11-07 06:41:08,992 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:41:08,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:41:08,993 INFO L82 PathProgramCache]: Analyzing trace with hash -686654612, now seen corresponding path program 14 times [2020-11-07 06:41:08,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:41:08,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464087767] [2020-11-07 06:41:08,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:41:09,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:09,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:41:09,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:09,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 25 proven. 2750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:41:09,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464087767] [2020-11-07 06:41:09,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:41:09,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-11-07 06:41:09,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840127832] [2020-11-07 06:41:09,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-07 06:41:09,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:41:09,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-07 06:41:09,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=488, Unknown=0, NotChecked=0, Total=870 [2020-11-07 06:41:09,823 INFO L87 Difference]: Start difference. First operand 253 states and 254 transitions. Second operand 30 states. [2020-11-07 06:41:13,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:41:13,624 INFO L93 Difference]: Finished difference Result 279 states and 281 transitions. [2020-11-07 06:41:13,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-11-07 06:41:13,626 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 249 [2020-11-07 06:41:13,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:41:13,629 INFO L225 Difference]: With dead ends: 279 [2020-11-07 06:41:13,629 INFO L226 Difference]: Without dead ends: 269 [2020-11-07 06:41:13,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2297, Invalid=4509, Unknown=0, NotChecked=0, Total=6806 [2020-11-07 06:41:13,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-11-07 06:41:13,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 259. [2020-11-07 06:41:13,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-11-07 06:41:13,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 260 transitions. [2020-11-07 06:41:13,765 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 260 transitions. Word has length 249 [2020-11-07 06:41:13,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:41:13,766 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 260 transitions. [2020-11-07 06:41:13,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-11-07 06:41:13,766 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 260 transitions. [2020-11-07 06:41:13,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-11-07 06:41:13,768 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:41:13,769 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:41:13,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-11-07 06:41:13,769 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:41:13,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:41:13,770 INFO L82 PathProgramCache]: Analyzing trace with hash -798815569, now seen corresponding path program 14 times [2020-11-07 06:41:13,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:41:13,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [414623978] [2020-11-07 06:41:13,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:41:13,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:16,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:41:16,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:16,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2825 backedges. 0 proven. 2825 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:41:16,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [414623978] [2020-11-07 06:41:16,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:41:16,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-11-07 06:41:16,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200959121] [2020-11-07 06:41:16,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-11-07 06:41:16,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:41:16,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-11-07 06:41:16,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2946, Unknown=0, NotChecked=0, Total=3080 [2020-11-07 06:41:16,247 INFO L87 Difference]: Start difference. First operand 259 states and 260 transitions. Second operand 56 states. [2020-11-07 06:41:26,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:41:26,744 INFO L93 Difference]: Finished difference Result 287 states and 290 transitions. [2020-11-07 06:41:26,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-11-07 06:41:26,745 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 251 [2020-11-07 06:41:26,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:41:26,748 INFO L225 Difference]: With dead ends: 287 [2020-11-07 06:41:26,748 INFO L226 Difference]: Without dead ends: 274 [2020-11-07 06:41:26,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3333 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=483, Invalid=11727, Unknown=0, NotChecked=0, Total=12210 [2020-11-07 06:41:26,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-11-07 06:41:26,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 271. [2020-11-07 06:41:26,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-11-07 06:41:26,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 272 transitions. [2020-11-07 06:41:26,870 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 272 transitions. Word has length 251 [2020-11-07 06:41:26,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:41:26,871 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 272 transitions. [2020-11-07 06:41:26,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-11-07 06:41:26,871 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 272 transitions. [2020-11-07 06:41:26,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2020-11-07 06:41:26,873 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:41:26,873 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:41:26,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-11-07 06:41:26,874 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:41:26,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:41:26,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1002125868, now seen corresponding path program 15 times [2020-11-07 06:41:26,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:41:26,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379044992] [2020-11-07 06:41:26,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:41:26,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:27,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:41:27,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:27,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 27 proven. 3213 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:41:27,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379044992] [2020-11-07 06:41:27,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:41:27,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-11-07 06:41:27,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12335937] [2020-11-07 06:41:27,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-11-07 06:41:27,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:41:27,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-11-07 06:41:27,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=553, Unknown=0, NotChecked=0, Total=992 [2020-11-07 06:41:27,839 INFO L87 Difference]: Start difference. First operand 271 states and 272 transitions. Second operand 32 states. [2020-11-07 06:41:32,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:41:32,226 INFO L93 Difference]: Finished difference Result 297 states and 299 transitions. [2020-11-07 06:41:32,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-11-07 06:41:32,227 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 267 [2020-11-07 06:41:32,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:41:32,229 INFO L225 Difference]: With dead ends: 297 [2020-11-07 06:41:32,229 INFO L226 Difference]: Without dead ends: 287 [2020-11-07 06:41:32,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2000 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2641, Invalid=5191, Unknown=0, NotChecked=0, Total=7832 [2020-11-07 06:41:32,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-11-07 06:41:32,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 277. [2020-11-07 06:41:32,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-11-07 06:41:32,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 278 transitions. [2020-11-07 06:41:32,313 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 278 transitions. Word has length 267 [2020-11-07 06:41:32,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:41:32,313 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 278 transitions. [2020-11-07 06:41:32,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-11-07 06:41:32,313 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 278 transitions. [2020-11-07 06:41:32,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-11-07 06:41:32,315 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:41:32,315 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:41:32,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-11-07 06:41:32,316 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:41:32,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:41:32,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1378412177, now seen corresponding path program 15 times [2020-11-07 06:41:32,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:41:32,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052101783] [2020-11-07 06:41:32,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:41:32,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:35,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:41:35,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:35,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3294 backedges. 0 proven. 3294 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:41:35,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052101783] [2020-11-07 06:41:35,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:41:35,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-11-07 06:41:35,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380305888] [2020-11-07 06:41:35,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-11-07 06:41:35,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:41:35,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-11-07 06:41:35,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=3396, Unknown=0, NotChecked=0, Total=3540 [2020-11-07 06:41:35,141 INFO L87 Difference]: Start difference. First operand 277 states and 278 transitions. Second operand 60 states. [2020-11-07 06:41:46,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:41:46,661 INFO L93 Difference]: Finished difference Result 305 states and 308 transitions. [2020-11-07 06:41:46,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-11-07 06:41:46,662 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 269 [2020-11-07 06:41:46,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:41:46,664 INFO L225 Difference]: With dead ends: 305 [2020-11-07 06:41:46,664 INFO L226 Difference]: Without dead ends: 292 [2020-11-07 06:41:46,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3869 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=519, Invalid=13523, Unknown=0, NotChecked=0, Total=14042 [2020-11-07 06:41:46,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-11-07 06:41:46,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 289. [2020-11-07 06:41:46,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-11-07 06:41:46,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 290 transitions. [2020-11-07 06:41:46,780 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 290 transitions. Word has length 269 [2020-11-07 06:41:46,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:41:46,780 INFO L481 AbstractCegarLoop]: Abstraction has 289 states and 290 transitions. [2020-11-07 06:41:46,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-11-07 06:41:46,780 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 290 transitions. [2020-11-07 06:41:46,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2020-11-07 06:41:46,782 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:41:46,782 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:41:46,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-11-07 06:41:46,783 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:41:46,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:41:46,783 INFO L82 PathProgramCache]: Analyzing trace with hash 2058995948, now seen corresponding path program 16 times [2020-11-07 06:41:46,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:41:46,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052203939] [2020-11-07 06:41:46,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:41:46,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:47,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:41:47,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:47,862 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 29 proven. 3712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:41:47,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052203939] [2020-11-07 06:41:47,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:41:47,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-11-07 06:41:47,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268060080] [2020-11-07 06:41:47,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-11-07 06:41:47,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:41:47,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-11-07 06:41:47,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=622, Unknown=0, NotChecked=0, Total=1122 [2020-11-07 06:41:47,865 INFO L87 Difference]: Start difference. First operand 289 states and 290 transitions. Second operand 34 states. [2020-11-07 06:41:52,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:41:52,471 INFO L93 Difference]: Finished difference Result 315 states and 317 transitions. [2020-11-07 06:41:52,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-11-07 06:41:52,472 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 285 [2020-11-07 06:41:52,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:41:52,475 INFO L225 Difference]: With dead ends: 315 [2020-11-07 06:41:52,475 INFO L226 Difference]: Without dead ends: 305 [2020-11-07 06:41:52,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2293 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3009, Invalid=5921, Unknown=0, NotChecked=0, Total=8930 [2020-11-07 06:41:52,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-11-07 06:41:52,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 295. [2020-11-07 06:41:52,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-11-07 06:41:52,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 296 transitions. [2020-11-07 06:41:52,621 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 296 transitions. Word has length 285 [2020-11-07 06:41:52,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:41:52,622 INFO L481 AbstractCegarLoop]: Abstraction has 295 states and 296 transitions. [2020-11-07 06:41:52,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-11-07 06:41:52,622 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 296 transitions. [2020-11-07 06:41:52,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2020-11-07 06:41:52,623 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:41:52,624 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:41:52,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-11-07 06:41:52,624 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:41:52,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:41:52,624 INFO L82 PathProgramCache]: Analyzing trace with hash 661452847, now seen corresponding path program 16 times [2020-11-07 06:41:52,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:41:52,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217513064] [2020-11-07 06:41:52,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:41:52,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:55,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:41:55,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:55,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3799 backedges. 0 proven. 3799 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:41:55,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217513064] [2020-11-07 06:41:55,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:41:55,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-11-07 06:41:55,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812832954] [2020-11-07 06:41:55,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-11-07 06:41:55,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:41:55,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-11-07 06:41:55,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=3878, Unknown=0, NotChecked=0, Total=4032 [2020-11-07 06:41:55,761 INFO L87 Difference]: Start difference. First operand 295 states and 296 transitions. Second operand 64 states. [2020-11-07 06:42:08,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:42:08,781 INFO L93 Difference]: Finished difference Result 323 states and 326 transitions. [2020-11-07 06:42:08,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-11-07 06:42:08,783 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 287 [2020-11-07 06:42:08,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:42:08,785 INFO L225 Difference]: With dead ends: 323 [2020-11-07 06:42:08,785 INFO L226 Difference]: Without dead ends: 310 [2020-11-07 06:42:08,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4445 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=555, Invalid=15447, Unknown=0, NotChecked=0, Total=16002 [2020-11-07 06:42:08,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-11-07 06:42:08,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 307. [2020-11-07 06:42:08,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-11-07 06:42:08,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 308 transitions. [2020-11-07 06:42:08,917 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 308 transitions. Word has length 287 [2020-11-07 06:42:08,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:42:08,917 INFO L481 AbstractCegarLoop]: Abstraction has 307 states and 308 transitions. [2020-11-07 06:42:08,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-11-07 06:42:08,917 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 308 transitions. [2020-11-07 06:42:08,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2020-11-07 06:42:08,920 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:42:08,920 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:42:08,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-11-07 06:42:08,920 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:42:08,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:42:08,921 INFO L82 PathProgramCache]: Analyzing trace with hash -130406484, now seen corresponding path program 17 times [2020-11-07 06:42:08,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:42:08,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [563280311] [2020-11-07 06:42:08,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:42:08,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:10,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:42:10,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:10,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 31 proven. 4247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:42:10,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [563280311] [2020-11-07 06:42:10,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:42:10,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-11-07 06:42:10,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464113121] [2020-11-07 06:42:10,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-11-07 06:42:10,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:42:10,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-11-07 06:42:10,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=565, Invalid=695, Unknown=0, NotChecked=0, Total=1260 [2020-11-07 06:42:10,099 INFO L87 Difference]: Start difference. First operand 307 states and 308 transitions. Second operand 36 states. [2020-11-07 06:42:15,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:42:15,313 INFO L93 Difference]: Finished difference Result 333 states and 335 transitions. [2020-11-07 06:42:15,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-11-07 06:42:15,314 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 303 [2020-11-07 06:42:15,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:42:15,317 INFO L225 Difference]: With dead ends: 333 [2020-11-07 06:42:15,317 INFO L226 Difference]: Without dead ends: 323 [2020-11-07 06:42:15,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=3401, Invalid=6699, Unknown=0, NotChecked=0, Total=10100 [2020-11-07 06:42:15,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2020-11-07 06:42:15,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 313. [2020-11-07 06:42:15,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2020-11-07 06:42:15,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 314 transitions. [2020-11-07 06:42:15,488 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 314 transitions. Word has length 303 [2020-11-07 06:42:15,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:42:15,489 INFO L481 AbstractCegarLoop]: Abstraction has 313 states and 314 transitions. [2020-11-07 06:42:15,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-11-07 06:42:15,489 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 314 transitions. [2020-11-07 06:42:15,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-11-07 06:42:15,491 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:42:15,492 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:42:15,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-11-07 06:42:15,492 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:42:15,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:42:15,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1179690735, now seen corresponding path program 17 times [2020-11-07 06:42:15,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:42:15,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428114262] [2020-11-07 06:42:15,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:42:15,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:18,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:42:18,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:19,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4340 backedges. 0 proven. 4340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:42:19,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428114262] [2020-11-07 06:42:19,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:42:19,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-11-07 06:42:19,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805267073] [2020-11-07 06:42:19,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-11-07 06:42:19,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:42:19,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-11-07 06:42:19,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=4392, Unknown=0, NotChecked=0, Total=4556 [2020-11-07 06:42:19,115 INFO L87 Difference]: Start difference. First operand 313 states and 314 transitions. Second operand 68 states. [2020-11-07 06:42:33,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:42:33,969 INFO L93 Difference]: Finished difference Result 341 states and 344 transitions. [2020-11-07 06:42:33,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-11-07 06:42:33,970 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 305 [2020-11-07 06:42:33,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:42:33,973 INFO L225 Difference]: With dead ends: 341 [2020-11-07 06:42:33,974 INFO L226 Difference]: Without dead ends: 328 [2020-11-07 06:42:33,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5061 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=591, Invalid=17499, Unknown=0, NotChecked=0, Total=18090 [2020-11-07 06:42:33,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-11-07 06:42:34,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 325. [2020-11-07 06:42:34,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-11-07 06:42:34,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 326 transitions. [2020-11-07 06:42:34,081 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 326 transitions. Word has length 305 [2020-11-07 06:42:34,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:42:34,081 INFO L481 AbstractCegarLoop]: Abstraction has 325 states and 326 transitions. [2020-11-07 06:42:34,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-11-07 06:42:34,081 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 326 transitions. [2020-11-07 06:42:34,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-11-07 06:42:34,083 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:42:34,083 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:42:34,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-11-07 06:42:34,083 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:42:34,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:42:34,084 INFO L82 PathProgramCache]: Analyzing trace with hash -446146964, now seen corresponding path program 18 times [2020-11-07 06:42:34,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:42:34,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803226303] [2020-11-07 06:42:34,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:42:34,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:35,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:42:35,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:35,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 33 proven. 4818 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:42:35,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803226303] [2020-11-07 06:42:35,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:42:35,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-11-07 06:42:35,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689775954] [2020-11-07 06:42:35,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-11-07 06:42:35,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:42:35,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-11-07 06:42:35,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=634, Invalid=772, Unknown=0, NotChecked=0, Total=1406 [2020-11-07 06:42:35,460 INFO L87 Difference]: Start difference. First operand 325 states and 326 transitions. Second operand 38 states. [2020-11-07 06:42:41,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:42:41,496 INFO L93 Difference]: Finished difference Result 351 states and 353 transitions. [2020-11-07 06:42:41,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-11-07 06:42:41,497 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 321 [2020-11-07 06:42:41,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:42:41,501 INFO L225 Difference]: With dead ends: 351 [2020-11-07 06:42:41,501 INFO L226 Difference]: Without dead ends: 341 [2020-11-07 06:42:41,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2939 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=3817, Invalid=7525, Unknown=0, NotChecked=0, Total=11342 [2020-11-07 06:42:41,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-11-07 06:42:41,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 331. [2020-11-07 06:42:41,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2020-11-07 06:42:41,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 332 transitions. [2020-11-07 06:42:41,643 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 332 transitions. Word has length 321 [2020-11-07 06:42:41,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:42:41,643 INFO L481 AbstractCegarLoop]: Abstraction has 331 states and 332 transitions. [2020-11-07 06:42:41,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-11-07 06:42:41,644 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 332 transitions. [2020-11-07 06:42:41,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-11-07 06:42:41,646 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:42:41,646 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:42:41,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-11-07 06:42:41,647 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:42:41,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:42:41,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1599199825, now seen corresponding path program 18 times [2020-11-07 06:42:41,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:42:41,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2142307738] [2020-11-07 06:42:41,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:42:41,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:46,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:42:46,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:46,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4917 backedges. 0 proven. 4917 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:42:46,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2142307738] [2020-11-07 06:42:46,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:42:46,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2020-11-07 06:42:46,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272672344] [2020-11-07 06:42:46,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-11-07 06:42:46,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:42:46,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-11-07 06:42:46,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=4938, Unknown=0, NotChecked=0, Total=5112 [2020-11-07 06:42:46,250 INFO L87 Difference]: Start difference. First operand 331 states and 332 transitions. Second operand 72 states. [2020-11-07 06:43:03,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:43:03,874 INFO L93 Difference]: Finished difference Result 359 states and 362 transitions. [2020-11-07 06:43:03,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-11-07 06:43:03,876 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 323 [2020-11-07 06:43:03,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:43:03,879 INFO L225 Difference]: With dead ends: 359 [2020-11-07 06:43:03,879 INFO L226 Difference]: Without dead ends: 346 [2020-11-07 06:43:03,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5717 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=627, Invalid=19679, Unknown=0, NotChecked=0, Total=20306 [2020-11-07 06:43:03,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-11-07 06:43:04,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 343. [2020-11-07 06:43:04,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-11-07 06:43:04,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 344 transitions. [2020-11-07 06:43:04,044 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 344 transitions. Word has length 323 [2020-11-07 06:43:04,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:43:04,044 INFO L481 AbstractCegarLoop]: Abstraction has 343 states and 344 transitions. [2020-11-07 06:43:04,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-11-07 06:43:04,045 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 344 transitions. [2020-11-07 06:43:04,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-11-07 06:43:04,047 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:43:04,048 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:43:04,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-11-07 06:43:04,048 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:43:04,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:43:04,049 INFO L82 PathProgramCache]: Analyzing trace with hash 7361836, now seen corresponding path program 19 times [2020-11-07 06:43:04,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:43:04,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [169537234] [2020-11-07 06:43:04,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:43:04,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:43:05,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:43:05,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:43:05,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 35 proven. 5425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:43:05,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [169537234] [2020-11-07 06:43:05,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:43:05,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-11-07 06:43:05,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992822028] [2020-11-07 06:43:05,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-11-07 06:43:05,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:43:05,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-11-07 06:43:05,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=853, Unknown=0, NotChecked=0, Total=1560 [2020-11-07 06:43:05,631 INFO L87 Difference]: Start difference. First operand 343 states and 344 transitions. Second operand 40 states. [2020-11-07 06:43:12,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:43:12,409 INFO L93 Difference]: Finished difference Result 369 states and 371 transitions. [2020-11-07 06:43:12,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-11-07 06:43:12,411 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 339 [2020-11-07 06:43:12,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:43:12,413 INFO L225 Difference]: With dead ends: 369 [2020-11-07 06:43:12,413 INFO L226 Difference]: Without dead ends: 359 [2020-11-07 06:43:12,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3292 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=4257, Invalid=8399, Unknown=0, NotChecked=0, Total=12656 [2020-11-07 06:43:12,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-11-07 06:43:12,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 349. [2020-11-07 06:43:12,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2020-11-07 06:43:12,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 350 transitions. [2020-11-07 06:43:12,590 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 350 transitions. Word has length 339 [2020-11-07 06:43:12,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:43:12,590 INFO L481 AbstractCegarLoop]: Abstraction has 349 states and 350 transitions. [2020-11-07 06:43:12,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-11-07 06:43:12,591 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 350 transitions. [2020-11-07 06:43:12,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-11-07 06:43:12,594 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:43:12,594 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:43:12,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-11-07 06:43:12,594 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:43:12,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:43:12,595 INFO L82 PathProgramCache]: Analyzing trace with hash 431060079, now seen corresponding path program 19 times [2020-11-07 06:43:12,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:43:12,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165800727] [2020-11-07 06:43:12,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:43:12,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:43:17,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:43:17,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:43:17,514 INFO L134 CoverageAnalysis]: Checked inductivity of 5530 backedges. 0 proven. 5530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:43:17,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165800727] [2020-11-07 06:43:17,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:43:17,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2020-11-07 06:43:17,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620538286] [2020-11-07 06:43:17,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-11-07 06:43:17,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:43:17,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-11-07 06:43:17,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=5516, Unknown=0, NotChecked=0, Total=5700 [2020-11-07 06:43:17,518 INFO L87 Difference]: Start difference. First operand 349 states and 350 transitions. Second operand 76 states. [2020-11-07 06:43:38,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:43:38,044 INFO L93 Difference]: Finished difference Result 377 states and 380 transitions. [2020-11-07 06:43:38,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-11-07 06:43:38,046 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 341 [2020-11-07 06:43:38,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:43:38,049 INFO L225 Difference]: With dead ends: 377 [2020-11-07 06:43:38,049 INFO L226 Difference]: Without dead ends: 364 [2020-11-07 06:43:38,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6413 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=663, Invalid=21987, Unknown=0, NotChecked=0, Total=22650 [2020-11-07 06:43:38,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2020-11-07 06:43:38,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 361. [2020-11-07 06:43:38,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2020-11-07 06:43:38,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 362 transitions. [2020-11-07 06:43:38,230 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 362 transitions. Word has length 341 [2020-11-07 06:43:38,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:43:38,231 INFO L481 AbstractCegarLoop]: Abstraction has 361 states and 362 transitions. [2020-11-07 06:43:38,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-11-07 06:43:38,231 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 362 transitions. [2020-11-07 06:43:38,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2020-11-07 06:43:38,234 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:43:38,234 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:43:38,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-11-07 06:43:38,234 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:43:38,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:43:38,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1417552876, now seen corresponding path program 20 times [2020-11-07 06:43:38,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:43:38,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1848552723] [2020-11-07 06:43:38,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:43:38,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:43:40,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:43:40,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:43:40,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 37 proven. 6068 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:43:40,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1848552723] [2020-11-07 06:43:40,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:43:40,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-11-07 06:43:40,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174598324] [2020-11-07 06:43:40,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-11-07 06:43:40,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:43:40,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-11-07 06:43:40,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=784, Invalid=938, Unknown=0, NotChecked=0, Total=1722 [2020-11-07 06:43:40,352 INFO L87 Difference]: Start difference. First operand 361 states and 362 transitions. Second operand 42 states. [2020-11-07 06:43:48,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:43:48,421 INFO L93 Difference]: Finished difference Result 387 states and 389 transitions. [2020-11-07 06:43:48,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-11-07 06:43:48,423 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 357 [2020-11-07 06:43:48,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:43:48,426 INFO L225 Difference]: With dead ends: 387 [2020-11-07 06:43:48,426 INFO L226 Difference]: Without dead ends: 377 [2020-11-07 06:43:48,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3665 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=4721, Invalid=9321, Unknown=0, NotChecked=0, Total=14042 [2020-11-07 06:43:48,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2020-11-07 06:43:48,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 367. [2020-11-07 06:43:48,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2020-11-07 06:43:48,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 368 transitions. [2020-11-07 06:43:48,588 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 368 transitions. Word has length 357 [2020-11-07 06:43:48,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:43:48,588 INFO L481 AbstractCegarLoop]: Abstraction has 367 states and 368 transitions. [2020-11-07 06:43:48,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-11-07 06:43:48,588 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 368 transitions. [2020-11-07 06:43:48,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2020-11-07 06:43:48,591 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:43:48,591 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:43:48,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-11-07 06:43:48,592 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:43:48,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:43:48,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1585016017, now seen corresponding path program 20 times [2020-11-07 06:43:48,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:43:48,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1570079567] [2020-11-07 06:43:48,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:43:48,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:43:54,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:43:54,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:43:54,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6179 backedges. 0 proven. 6179 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:43:54,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1570079567] [2020-11-07 06:43:54,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:43:54,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2020-11-07 06:43:54,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690624767] [2020-11-07 06:43:54,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-11-07 06:43:54,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:43:54,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-11-07 06:43:54,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=6126, Unknown=0, NotChecked=0, Total=6320 [2020-11-07 06:43:54,635 INFO L87 Difference]: Start difference. First operand 367 states and 368 transitions. Second operand 80 states. [2020-11-07 06:44:19,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:44:19,389 INFO L93 Difference]: Finished difference Result 395 states and 398 transitions. [2020-11-07 06:44:19,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-11-07 06:44:19,391 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 359 [2020-11-07 06:44:19,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:44:19,394 INFO L225 Difference]: With dead ends: 395 [2020-11-07 06:44:19,395 INFO L226 Difference]: Without dead ends: 382 [2020-11-07 06:44:19,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7149 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=699, Invalid=24423, Unknown=0, NotChecked=0, Total=25122 [2020-11-07 06:44:19,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2020-11-07 06:44:19,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 379. [2020-11-07 06:44:19,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2020-11-07 06:44:19,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 380 transitions. [2020-11-07 06:44:19,574 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 380 transitions. Word has length 359 [2020-11-07 06:44:19,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:44:19,575 INFO L481 AbstractCegarLoop]: Abstraction has 379 states and 380 transitions. [2020-11-07 06:44:19,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-11-07 06:44:19,575 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 380 transitions. [2020-11-07 06:44:19,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2020-11-07 06:44:19,578 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:44:19,579 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:44:19,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-11-07 06:44:19,579 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:44:19,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:44:19,580 INFO L82 PathProgramCache]: Analyzing trace with hash -105004372, now seen corresponding path program 21 times [2020-11-07 06:44:19,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:44:19,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [680036034] [2020-11-07 06:44:19,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:44:19,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:44:21,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:44:21,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:44:21,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 39 proven. 6747 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:44:21,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [680036034] [2020-11-07 06:44:21,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:44:21,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-11-07 06:44:21,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993488972] [2020-11-07 06:44:21,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-11-07 06:44:22,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:44:22,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-11-07 06:44:22,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=865, Invalid=1027, Unknown=0, NotChecked=0, Total=1892 [2020-11-07 06:44:22,001 INFO L87 Difference]: Start difference. First operand 379 states and 380 transitions. Second operand 44 states. [2020-11-07 06:44:31,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:44:31,850 INFO L93 Difference]: Finished difference Result 405 states and 407 transitions. [2020-11-07 06:44:31,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-11-07 06:44:31,852 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 375 [2020-11-07 06:44:31,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:44:31,854 INFO L225 Difference]: With dead ends: 405 [2020-11-07 06:44:31,855 INFO L226 Difference]: Without dead ends: 395 [2020-11-07 06:44:31,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4058 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=5209, Invalid=10291, Unknown=0, NotChecked=0, Total=15500 [2020-11-07 06:44:31,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-11-07 06:44:32,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 385. [2020-11-07 06:44:32,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2020-11-07 06:44:32,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 386 transitions. [2020-11-07 06:44:32,013 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 386 transitions. Word has length 375 [2020-11-07 06:44:32,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:44:32,014 INFO L481 AbstractCegarLoop]: Abstraction has 385 states and 386 transitions. [2020-11-07 06:44:32,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-11-07 06:44:32,014 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 386 transitions. [2020-11-07 06:44:32,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2020-11-07 06:44:32,019 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:44:32,019 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:44:32,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-11-07 06:44:32,020 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:44:32,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:44:32,021 INFO L82 PathProgramCache]: Analyzing trace with hash -178683409, now seen corresponding path program 21 times [2020-11-07 06:44:32,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:44:32,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [759442878] [2020-11-07 06:44:32,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:44:32,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:44:39,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:44:39,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:44:39,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6864 backedges. 0 proven. 6864 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:44:39,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [759442878] [2020-11-07 06:44:39,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:44:39,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2020-11-07 06:44:39,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703127751] [2020-11-07 06:44:39,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-11-07 06:44:39,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:44:39,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-11-07 06:44:39,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=6768, Unknown=0, NotChecked=0, Total=6972 [2020-11-07 06:44:39,540 INFO L87 Difference]: Start difference. First operand 385 states and 386 transitions. Second operand 84 states. [2020-11-07 06:45:09,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:45:09,119 INFO L93 Difference]: Finished difference Result 413 states and 416 transitions. [2020-11-07 06:45:09,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-11-07 06:45:09,121 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 377 [2020-11-07 06:45:09,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:45:09,124 INFO L225 Difference]: With dead ends: 413 [2020-11-07 06:45:09,124 INFO L226 Difference]: Without dead ends: 400 [2020-11-07 06:45:09,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7925 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=735, Invalid=26987, Unknown=0, NotChecked=0, Total=27722 [2020-11-07 06:45:09,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2020-11-07 06:45:09,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 397. [2020-11-07 06:45:09,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 397 states. [2020-11-07 06:45:09,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 398 transitions. [2020-11-07 06:45:09,437 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 398 transitions. Word has length 377 [2020-11-07 06:45:09,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:45:09,437 INFO L481 AbstractCegarLoop]: Abstraction has 397 states and 398 transitions. [2020-11-07 06:45:09,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-11-07 06:45:09,437 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 398 transitions. [2020-11-07 06:45:09,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2020-11-07 06:45:09,442 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:45:09,442 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:45:09,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-11-07 06:45:09,443 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:45:09,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:45:09,444 INFO L82 PathProgramCache]: Analyzing trace with hash -715443860, now seen corresponding path program 22 times [2020-11-07 06:45:09,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:45:09,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674716378] [2020-11-07 06:45:09,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:45:09,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:45:12,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:45:12,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:45:12,237 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 41 proven. 7462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:45:12,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674716378] [2020-11-07 06:45:12,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:45:12,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-11-07 06:45:12,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010082862] [2020-11-07 06:45:12,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-11-07 06:45:12,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:45:12,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-11-07 06:45:12,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=950, Invalid=1120, Unknown=0, NotChecked=0, Total=2070 [2020-11-07 06:45:12,241 INFO L87 Difference]: Start difference. First operand 397 states and 398 transitions. Second operand 46 states. [2020-11-07 06:45:23,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:45:23,804 INFO L93 Difference]: Finished difference Result 423 states and 425 transitions. [2020-11-07 06:45:23,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-11-07 06:45:23,806 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 393 [2020-11-07 06:45:23,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:45:23,809 INFO L225 Difference]: With dead ends: 423 [2020-11-07 06:45:23,809 INFO L226 Difference]: Without dead ends: 413 [2020-11-07 06:45:23,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4471 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=5721, Invalid=11309, Unknown=0, NotChecked=0, Total=17030 [2020-11-07 06:45:23,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2020-11-07 06:45:23,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 403. [2020-11-07 06:45:23,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2020-11-07 06:45:23,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 404 transitions. [2020-11-07 06:45:23,968 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 404 transitions. Word has length 393 [2020-11-07 06:45:23,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:45:23,968 INFO L481 AbstractCegarLoop]: Abstraction has 403 states and 404 transitions. [2020-11-07 06:45:23,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-11-07 06:45:23,968 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 404 transitions. [2020-11-07 06:45:23,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2020-11-07 06:45:23,970 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:45:23,970 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:45:23,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-11-07 06:45:23,971 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:45:23,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:45:23,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1599488175, now seen corresponding path program 22 times [2020-11-07 06:45:23,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:45:23,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186262186] [2020-11-07 06:45:23,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:45:24,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:45:32,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:45:32,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:45:32,998 INFO L134 CoverageAnalysis]: Checked inductivity of 7585 backedges. 0 proven. 7585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:45:32,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186262186] [2020-11-07 06:45:32,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:45:32,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2020-11-07 06:45:32,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572071776] [2020-11-07 06:45:32,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-11-07 06:45:32,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:45:33,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-11-07 06:45:33,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=7442, Unknown=0, NotChecked=0, Total=7656 [2020-11-07 06:45:33,000 INFO L87 Difference]: Start difference. First operand 403 states and 404 transitions. Second operand 88 states. [2020-11-07 06:46:10,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:46:10,161 INFO L93 Difference]: Finished difference Result 431 states and 434 transitions. [2020-11-07 06:46:10,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2020-11-07 06:46:10,162 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 395 [2020-11-07 06:46:10,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:46:10,165 INFO L225 Difference]: With dead ends: 431 [2020-11-07 06:46:10,166 INFO L226 Difference]: Without dead ends: 418 [2020-11-07 06:46:10,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8741 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=771, Invalid=29679, Unknown=0, NotChecked=0, Total=30450 [2020-11-07 06:46:10,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-11-07 06:46:10,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 415. [2020-11-07 06:46:10,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415 states. [2020-11-07 06:46:10,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 416 transitions. [2020-11-07 06:46:10,422 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 416 transitions. Word has length 395 [2020-11-07 06:46:10,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:46:10,423 INFO L481 AbstractCegarLoop]: Abstraction has 415 states and 416 transitions. [2020-11-07 06:46:10,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-11-07 06:46:10,423 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 416 transitions. [2020-11-07 06:46:10,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2020-11-07 06:46:10,426 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:46:10,426 INFO L422 BasicCegarLoop]: trace histogram [44, 43, 43, 43, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:46:10,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-11-07 06:46:10,427 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:46:10,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:46:10,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1501720620, now seen corresponding path program 23 times [2020-11-07 06:46:10,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:46:10,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525771636] [2020-11-07 06:46:10,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:46:10,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:46:13,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:46:13,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:46:13,895 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 43 proven. 8213 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:46:13,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525771636] [2020-11-07 06:46:13,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:46:13,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-11-07 06:46:13,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605674598] [2020-11-07 06:46:13,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-11-07 06:46:13,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:46:13,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-11-07 06:46:13,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1039, Invalid=1217, Unknown=0, NotChecked=0, Total=2256 [2020-11-07 06:46:13,898 INFO L87 Difference]: Start difference. First operand 415 states and 416 transitions. Second operand 48 states. [2020-11-07 06:46:28,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:46:28,219 INFO L93 Difference]: Finished difference Result 441 states and 443 transitions. [2020-11-07 06:46:28,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2020-11-07 06:46:28,223 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 411 [2020-11-07 06:46:28,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:46:28,226 INFO L225 Difference]: With dead ends: 441 [2020-11-07 06:46:28,226 INFO L226 Difference]: Without dead ends: 431 [2020-11-07 06:46:28,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4904 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=6257, Invalid=12375, Unknown=0, NotChecked=0, Total=18632 [2020-11-07 06:46:28,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2020-11-07 06:46:28,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 421. [2020-11-07 06:46:28,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 421 states. [2020-11-07 06:46:28,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 422 transitions. [2020-11-07 06:46:28,452 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 422 transitions. Word has length 411 [2020-11-07 06:46:28,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:46:28,452 INFO L481 AbstractCegarLoop]: Abstraction has 421 states and 422 transitions. [2020-11-07 06:46:28,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-11-07 06:46:28,453 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 422 transitions. [2020-11-07 06:46:28,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2020-11-07 06:46:28,455 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:46:28,455 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:46:28,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-11-07 06:46:28,456 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:46:28,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:46:28,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1990774639, now seen corresponding path program 23 times [2020-11-07 06:46:28,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:46:28,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [63574440] [2020-11-07 06:46:28,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:46:28,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:46:38,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:46:38,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:46:39,180 INFO L134 CoverageAnalysis]: Checked inductivity of 8342 backedges. 0 proven. 8342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:46:39,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [63574440] [2020-11-07 06:46:39,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:46:39,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2020-11-07 06:46:39,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574880387] [2020-11-07 06:46:39,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-11-07 06:46:39,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:46:39,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-11-07 06:46:39,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=8148, Unknown=0, NotChecked=0, Total=8372 [2020-11-07 06:46:39,183 INFO L87 Difference]: Start difference. First operand 421 states and 422 transitions. Second operand 92 states. [2020-11-07 06:47:28,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:47:28,988 INFO L93 Difference]: Finished difference Result 449 states and 452 transitions. [2020-11-07 06:47:28,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-11-07 06:47:28,992 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 413 [2020-11-07 06:47:28,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:47:28,995 INFO L225 Difference]: With dead ends: 449 [2020-11-07 06:47:28,995 INFO L226 Difference]: Without dead ends: 436 [2020-11-07 06:47:28,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9597 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=807, Invalid=32499, Unknown=0, NotChecked=0, Total=33306 [2020-11-07 06:47:29,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2020-11-07 06:47:29,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 433. [2020-11-07 06:47:29,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 433 states. [2020-11-07 06:47:29,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 434 transitions. [2020-11-07 06:47:29,236 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 434 transitions. Word has length 413 [2020-11-07 06:47:29,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:47:29,237 INFO L481 AbstractCegarLoop]: Abstraction has 433 states and 434 transitions. [2020-11-07 06:47:29,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-11-07 06:47:29,237 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 434 transitions. [2020-11-07 06:47:29,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2020-11-07 06:47:29,241 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:47:29,241 INFO L422 BasicCegarLoop]: trace histogram [46, 45, 45, 45, 45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:47:29,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-11-07 06:47:29,241 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:47:29,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:47:29,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1163886316, now seen corresponding path program 24 times [2020-11-07 06:47:29,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:47:29,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444996337] [2020-11-07 06:47:29,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:47:29,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:47:33,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:47:33,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:47:33,599 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 45 proven. 9000 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:47:33,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444996337] [2020-11-07 06:47:33,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:47:33,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-11-07 06:47:33,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732277512] [2020-11-07 06:47:33,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-11-07 06:47:33,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:47:33,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-11-07 06:47:33,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1132, Invalid=1318, Unknown=0, NotChecked=0, Total=2450 [2020-11-07 06:47:33,602 INFO L87 Difference]: Start difference. First operand 433 states and 434 transitions. Second operand 50 states. [2020-11-07 06:47:49,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:47:49,841 INFO L93 Difference]: Finished difference Result 459 states and 461 transitions. [2020-11-07 06:47:49,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-11-07 06:47:49,844 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 429 [2020-11-07 06:47:49,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:47:49,847 INFO L225 Difference]: With dead ends: 459 [2020-11-07 06:47:49,847 INFO L226 Difference]: Without dead ends: 449 [2020-11-07 06:47:49,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5357 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=6817, Invalid=13489, Unknown=0, NotChecked=0, Total=20306 [2020-11-07 06:47:49,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2020-11-07 06:47:50,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 439. [2020-11-07 06:47:50,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 439 states. [2020-11-07 06:47:50,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 440 transitions. [2020-11-07 06:47:50,062 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 440 transitions. Word has length 429 [2020-11-07 06:47:50,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:47:50,063 INFO L481 AbstractCegarLoop]: Abstraction has 439 states and 440 transitions. [2020-11-07 06:47:50,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-11-07 06:47:50,063 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 440 transitions. [2020-11-07 06:47:50,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2020-11-07 06:47:50,076 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:47:50,076 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:47:50,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-11-07 06:47:50,076 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:47:50,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:47:50,077 INFO L82 PathProgramCache]: Analyzing trace with hash -545444305, now seen corresponding path program 24 times [2020-11-07 06:47:50,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:47:50,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506396830] [2020-11-07 06:47:50,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:47:50,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:48:03,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:48:03,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:48:04,332 INFO L134 CoverageAnalysis]: Checked inductivity of 9135 backedges. 0 proven. 9135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:48:04,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506396830] [2020-11-07 06:48:04,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:48:04,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2020-11-07 06:48:04,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466852] [2020-11-07 06:48:04,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-11-07 06:48:04,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:48:04,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-11-07 06:48:04,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=8886, Unknown=0, NotChecked=0, Total=9120 [2020-11-07 06:48:04,335 INFO L87 Difference]: Start difference. First operand 439 states and 440 transitions. Second operand 96 states. [2020-11-07 06:49:00,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:49:00,519 INFO L93 Difference]: Finished difference Result 467 states and 470 transitions. [2020-11-07 06:49:00,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2020-11-07 06:49:00,522 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 431 [2020-11-07 06:49:00,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:49:00,525 INFO L225 Difference]: With dead ends: 467 [2020-11-07 06:49:00,525 INFO L226 Difference]: Without dead ends: 454 [2020-11-07 06:49:00,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10493 ImplicationChecksByTransitivity, 28.9s TimeCoverageRelationStatistics Valid=843, Invalid=35447, Unknown=0, NotChecked=0, Total=36290 [2020-11-07 06:49:00,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2020-11-07 06:49:00,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 451. [2020-11-07 06:49:00,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2020-11-07 06:49:00,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 452 transitions. [2020-11-07 06:49:00,730 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 452 transitions. Word has length 431 [2020-11-07 06:49:00,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:49:00,730 INFO L481 AbstractCegarLoop]: Abstraction has 451 states and 452 transitions. [2020-11-07 06:49:00,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 96 states. [2020-11-07 06:49:00,731 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 452 transitions. [2020-11-07 06:49:00,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2020-11-07 06:49:00,734 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:49:00,734 INFO L422 BasicCegarLoop]: trace histogram [48, 47, 47, 47, 47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:49:00,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-11-07 06:49:00,734 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:49:00,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:49:00,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1696488876, now seen corresponding path program 25 times [2020-11-07 06:49:00,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:49:00,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627603363] [2020-11-07 06:49:00,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:49:00,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:49:13,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:49:13,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:49:13,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9870 backedges. 1 proven. 9869 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:49:13,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627603363] [2020-11-07 06:49:13,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:49:13,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102] total 102 [2020-11-07 06:49:13,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873663923] [2020-11-07 06:49:13,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 102 states [2020-11-07 06:49:13,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:49:13,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2020-11-07 06:49:13,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=9957, Unknown=0, NotChecked=0, Total=10302 [2020-11-07 06:49:13,686 INFO L87 Difference]: Start difference. First operand 451 states and 452 transitions. Second operand 102 states. [2020-11-07 06:49:14,362 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-11-07 06:49:14,940 WARN L194 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 34 [2020-11-07 06:49:15,395 WARN L194 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 39 [2020-11-07 06:49:16,201 WARN L194 SmtUtils]: Spent 619.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 157 [2020-11-07 06:49:17,158 WARN L194 SmtUtils]: Spent 596.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 160 [2020-11-07 06:49:18,203 WARN L194 SmtUtils]: Spent 699.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 165 [2020-11-07 06:49:19,409 WARN L194 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 156 [2020-11-07 06:49:20,238 WARN L194 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 244 DAG size of output: 159 [2020-11-07 06:49:21,159 WARN L194 SmtUtils]: Spent 669.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 164 [2020-11-07 06:49:21,890 WARN L194 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 154 [2020-11-07 06:49:22,772 WARN L194 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 160 [2020-11-07 06:49:23,729 WARN L194 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 165 [2020-11-07 06:49:24,535 WARN L194 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 155 [2020-11-07 06:49:25,315 WARN L194 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 155 [2020-11-07 06:49:26,133 WARN L194 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 160 [2020-11-07 06:49:26,828 WARN L194 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 149 [2020-11-07 06:49:27,644 WARN L194 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 156 [2020-11-07 06:49:28,645 WARN L194 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 161 [2020-11-07 06:49:29,475 WARN L194 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 150 [2020-11-07 06:49:30,445 WARN L194 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 151 [2020-11-07 06:49:31,470 WARN L194 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 156 [2020-11-07 06:49:32,294 WARN L194 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 137 [2020-11-07 06:49:33,295 WARN L194 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 141 [2020-11-07 06:49:34,326 WARN L194 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 151 [2020-11-07 06:49:35,186 WARN L194 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 136 [2020-11-07 06:49:36,220 WARN L194 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 141 [2020-11-07 06:49:37,251 WARN L194 SmtUtils]: Spent 636.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 146 [2020-11-07 06:49:38,095 WARN L194 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 132 [2020-11-07 06:49:39,120 WARN L194 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 137 [2020-11-07 06:49:40,159 WARN L194 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 142 [2020-11-07 06:49:41,047 WARN L194 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 132 [2020-11-07 06:49:42,068 WARN L194 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 137 [2020-11-07 06:49:43,107 WARN L194 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 142 [2020-11-07 06:49:43,957 WARN L194 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 127 [2020-11-07 06:49:45,005 WARN L194 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 132 [2020-11-07 06:49:46,031 WARN L194 SmtUtils]: Spent 581.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 137 [2020-11-07 06:49:46,904 WARN L194 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 127 [2020-11-07 06:49:47,971 WARN L194 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 127 [2020-11-07 06:49:49,019 WARN L194 SmtUtils]: Spent 567.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 132 [2020-11-07 06:49:49,891 WARN L194 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 122 [2020-11-07 06:49:50,981 WARN L194 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 127 [2020-11-07 06:49:52,057 WARN L194 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 132 [2020-11-07 06:49:52,910 WARN L194 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 122 [2020-11-07 06:49:54,000 WARN L194 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 122 [2020-11-07 06:49:55,058 WARN L194 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 127 [2020-11-07 06:49:55,932 WARN L194 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 117 [2020-11-07 06:49:57,062 WARN L194 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 117 [2020-11-07 06:49:58,003 WARN L194 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 122 [2020-11-07 06:49:58,782 WARN L194 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 117 [2020-11-07 06:49:59,720 WARN L194 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 117 [2020-11-07 06:50:00,581 WARN L194 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 122 [2020-11-07 06:50:01,304 WARN L194 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 112 [2020-11-07 06:50:02,212 WARN L194 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 112 [2020-11-07 06:50:03,048 WARN L194 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 117 [2020-11-07 06:50:03,751 WARN L194 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 112 [2020-11-07 06:50:04,655 WARN L194 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 112 [2020-11-07 06:50:05,542 WARN L194 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 117 [2020-11-07 06:50:06,251 WARN L194 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 107 [2020-11-07 06:50:07,120 WARN L194 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 107 [2020-11-07 06:50:07,946 WARN L194 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 112 [2020-11-07 06:50:08,647 WARN L194 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 107 [2020-11-07 06:50:09,505 WARN L194 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 102 [2020-11-07 06:50:10,346 WARN L194 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 107 [2020-11-07 06:50:11,074 WARN L194 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 102 [2020-11-07 06:50:11,967 WARN L194 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 102 [2020-11-07 06:50:12,799 WARN L194 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 107 [2020-11-07 06:50:13,520 WARN L194 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 102 [2020-11-07 06:50:14,400 WARN L194 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 97 [2020-11-07 06:50:15,306 WARN L194 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 102 [2020-11-07 06:50:15,995 WARN L194 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 97 [2020-11-07 06:50:16,876 WARN L194 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 97 [2020-11-07 06:50:17,676 WARN L194 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 102 [2020-11-07 06:50:18,372 WARN L194 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 97 [2020-11-07 06:50:19,231 WARN L194 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 92 [2020-11-07 06:50:20,018 WARN L194 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 97 [2020-11-07 06:50:20,700 WARN L194 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 92 [2020-11-07 06:50:21,744 WARN L194 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 87 [2020-11-07 06:50:22,677 WARN L194 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 92 [2020-11-07 06:50:23,542 WARN L194 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 92 [2020-11-07 06:50:24,568 WARN L194 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 87 [2020-11-07 06:50:25,477 WARN L194 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 92 [2020-11-07 06:50:26,251 WARN L194 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 87 [2020-11-07 06:50:27,252 WARN L194 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 82 [2020-11-07 06:50:28,161 WARN L194 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 87 [2020-11-07 06:50:28,912 WARN L194 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 82 [2020-11-07 06:50:29,935 WARN L194 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 82 [2020-11-07 06:50:30,924 WARN L194 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 87 [2020-11-07 06:50:31,712 WARN L194 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 82 [2020-11-07 06:50:32,692 WARN L194 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 77 [2020-11-07 06:50:33,621 WARN L194 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 82 [2020-11-07 06:50:34,403 WARN L194 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 77 [2020-11-07 06:50:35,413 WARN L194 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 77 [2020-11-07 06:50:36,464 WARN L194 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 82 [2020-11-07 06:50:37,292 WARN L194 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 77 [2020-11-07 06:50:38,366 WARN L194 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 77 [2020-11-07 06:50:39,280 WARN L194 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 77 [2020-11-07 06:50:40,024 WARN L194 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 72 [2020-11-07 06:50:40,954 WARN L194 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 72 [2020-11-07 06:50:41,838 WARN L194 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 77 [2020-11-07 06:50:42,564 WARN L194 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 72 [2020-11-07 06:50:43,457 WARN L194 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 72 [2020-11-07 06:50:44,298 WARN L194 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 77 [2020-11-07 06:50:44,968 WARN L194 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 67 [2020-11-07 06:50:45,841 WARN L194 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 67 [2020-11-07 06:50:46,662 WARN L194 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 72 [2020-11-07 06:50:47,341 WARN L194 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 67 [2020-11-07 06:50:48,186 WARN L194 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 67 [2020-11-07 06:50:48,944 WARN L194 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 72 [2020-11-07 06:50:49,563 WARN L194 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2020-11-07 06:50:50,419 WARN L194 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2020-11-07 06:50:51,268 WARN L194 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 67 [2020-11-07 06:50:51,925 WARN L194 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2020-11-07 06:50:52,745 WARN L194 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2020-11-07 06:50:53,573 WARN L194 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2020-11-07 06:50:54,226 WARN L194 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2020-11-07 06:50:55,060 WARN L194 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2020-11-07 06:50:55,837 WARN L194 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2020-11-07 06:50:56,453 WARN L194 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2020-11-07 06:50:57,247 WARN L194 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2020-11-07 06:50:58,047 WARN L194 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2020-11-07 06:50:58,700 WARN L194 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-11-07 06:50:59,478 WARN L194 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-11-07 06:51:00,270 WARN L194 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2020-11-07 06:51:00,869 WARN L194 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-11-07 06:51:01,566 WARN L194 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-11-07 06:51:02,291 WARN L194 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-11-07 06:51:02,895 WARN L194 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-11-07 06:51:03,582 WARN L194 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-11-07 06:51:04,281 WARN L194 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-11-07 06:51:04,794 WARN L194 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-11-07 06:51:05,389 WARN L194 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-11-07 06:51:06,127 WARN L194 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-11-07 06:51:06,651 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2020-11-07 06:51:07,231 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2020-11-07 06:51:07,876 WARN L194 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-11-07 06:51:09,374 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-11-07 06:51:11,331 WARN L194 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 35 [2020-11-07 06:51:13,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:51:13,961 INFO L93 Difference]: Finished difference Result 476 states and 478 transitions. [2020-11-07 06:51:13,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2020-11-07 06:51:13,966 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 447 [2020-11-07 06:51:13,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:51:13,969 INFO L225 Difference]: With dead ends: 476 [2020-11-07 06:51:13,970 INFO L226 Difference]: Without dead ends: 466 [2020-11-07 06:51:13,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14912 ImplicationChecksByTransitivity, 125.0s TimeCoverageRelationStatistics Valid=11505, Invalid=50247, Unknown=0, NotChecked=0, Total=61752 [2020-11-07 06:51:13,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2020-11-07 06:51:14,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 457. [2020-11-07 06:51:14,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 457 states. [2020-11-07 06:51:14,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 458 transitions. [2020-11-07 06:51:14,249 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 458 transitions. Word has length 447 [2020-11-07 06:51:14,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:51:14,249 INFO L481 AbstractCegarLoop]: Abstraction has 457 states and 458 transitions. [2020-11-07 06:51:14,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 102 states. [2020-11-07 06:51:14,249 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 458 transitions. [2020-11-07 06:51:14,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-11-07 06:51:14,252 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:51:14,252 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:51:14,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-11-07 06:51:14,253 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:51:14,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:51:14,253 INFO L82 PathProgramCache]: Analyzing trace with hash 184507631, now seen corresponding path program 25 times [2020-11-07 06:51:14,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:51:14,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83641015] [2020-11-07 06:51:14,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:51:14,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:51:29,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:51:29,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:51:30,199 INFO L134 CoverageAnalysis]: Checked inductivity of 9964 backedges. 0 proven. 9964 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:51:30,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83641015] [2020-11-07 06:51:30,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:51:30,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100] total 100 [2020-11-07 06:51:30,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36177404] [2020-11-07 06:51:30,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 100 states [2020-11-07 06:51:30,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:51:30,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2020-11-07 06:51:30,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=9656, Unknown=0, NotChecked=0, Total=9900 [2020-11-07 06:51:30,201 INFO L87 Difference]: Start difference. First operand 457 states and 458 transitions. Second operand 100 states. [2020-11-07 06:52:39,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:52:39,168 INFO L93 Difference]: Finished difference Result 485 states and 488 transitions. [2020-11-07 06:52:39,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2020-11-07 06:52:39,173 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 449 [2020-11-07 06:52:39,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:52:39,176 INFO L225 Difference]: With dead ends: 485 [2020-11-07 06:52:39,176 INFO L226 Difference]: Without dead ends: 472 [2020-11-07 06:52:39,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11429 ImplicationChecksByTransitivity, 33.8s TimeCoverageRelationStatistics Valid=879, Invalid=38523, Unknown=0, NotChecked=0, Total=39402 [2020-11-07 06:52:39,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-11-07 06:52:39,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 469. [2020-11-07 06:52:39,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2020-11-07 06:52:39,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 470 transitions. [2020-11-07 06:52:39,462 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 470 transitions. Word has length 449 [2020-11-07 06:52:39,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:52:39,462 INFO L481 AbstractCegarLoop]: Abstraction has 469 states and 470 transitions. [2020-11-07 06:52:39,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 100 states. [2020-11-07 06:52:39,462 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 470 transitions. [2020-11-07 06:52:39,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2020-11-07 06:52:39,464 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:52:39,464 INFO L422 BasicCegarLoop]: trace histogram [50, 49, 49, 49, 49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:52:39,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-11-07 06:52:39,465 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:52:39,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:52:39,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1374358636, now seen corresponding path program 26 times [2020-11-07 06:52:39,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:52:39,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [515957567] [2020-11-07 06:52:39,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:52:39,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat